uae_cpu/fpu/fpu_x86.cpp

/*
 *  fpu_x86.cpp - 68881/68040 fpu code for x86/Windows an Linux/x86.
 *
 *  Basilisk II (C) 1997-2004 Christian Bauer
 *
 *  MC68881/68040 fpu emulation
 *
 *  Based on UAE FPU, original copyright 1996 Herman ten Brugge,
 *  rewritten for x86 by Lauri Pesonen 1999-2000,
 *  accomodated to GCC's Extended Asm syntax by Gwenole Beauchesne 2000.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 *      Interface
 *              Almost the same as original. Please see the comments in "fpu.h".
 *
 *
 *      Why assembly?
 *              The reason is not really speed, but to get infinities,
 *              NANs and flags finally working.
 *
 *
 *      How to maintain Mac and x86 FPU flags -- plan B
 *
 *      regs.piar is not updated.
 *
 *      regs.FPU fpcr always contains the real 68881/68040 control word.
 *
 *      regs.FPU fpsr is not kept up-to-date, for efficiency reasons.
 *      Most of the FPU commands update this in a way or another, but it is not
 *      read nearly that often. Therefore, three host-specific words hold the
 *      status byte and exception byte ("x86_status_word"), accrued exception
 *      byte ("x86_status_word_accrued") and the quotient byte ("FPU fpsr.quotient"),
 *      as explained below.
 *
 *      CONDITION CODE - QUOTIENT - EXCEPTION STATUS - ACCRUED EXCEPTION
 *              CONDITION CODE (N,Z,I,NAN)
 *              -       updated after each opcode, if needed.
 *              -       x86 assembly opcodes call FXAM and store the status word to
 *                      "x86_status_word".
 *              -       When regs.FPU fpsr is actually used, the value of "x86_status_word"
 *                      is translated.
 *              QUOTIENT BYTE
 *              -       Updated by frem, fmod, frestore(null frame)
 *              -       Stored in "FPU fpsr.quotient" in correct bit position, combined when
 *                      regs.FPU fpsr is actually used.
 *              EXCEPTION STATUS (BSUN,SNAN,OPERR,OVFL,UNFL,DZ,INEX2,INEX1)
 *              -       updated after each opcode, if needed.
 *              -       Saved in x86 form in "x86_status_word".
 *              -       When regs.FPU fpsr is actually used, the value of "x86_status_word"
 *                      is translated.
 *              -       Only fcc_op can set BSUN
 *              ACCRUED EXCEPTION (ACCR_IOP,ACCR_OVFL,ACCR_UNFL,ACCR_DZ,ACCR_INEX)
 *              -       updated after each opcode, if needed.
 *              -       Logically OR'ed in x86 form to "x86_status_word_accrued".
 *              -       When regs.FPU fpsr is actually used, the value of
 *                      "x86_status_word_accrued" is translated.
 *              
 *              When "x86_status_word" and "x86_status_word_accrued" are stored,
 *              all pending x86 FPU exceptions are cleared, if there are any.
 *
 *              Writing to "regs.FPU fpsr" reverse-maps to x86 status/exception values and
 *              stores the values in "x86_status_word", "x86_status_word_accrued"
 *              and "FPU fpsr.quotient".
 *
 *              So, "x86_status_word" and "x86_status_word_accrued" are not in
 *              correct bit positions and have x86 values, but "FPU fpsr.quotient" is at
 *              correct position.
 *
 *              Note that it does not matter that the reverse-mapping is not exact
 *              (both SW_IE and SW_DE are mapped to ACCR_IOP, but ACCR_IOP maps to
 *              SW_IE only), the MacOS always sees the correct exception bits.
 *
 *              Also note the usage of the fake BSUN flag SW_FAKE_BSUN. If you change
 *              the x86 FPU code, you must make sure that you don't generate any FPU
 *              stack faults.
 *
 *
 *      x86 co-processor initialization:
 *
 *      Bit  Code   Use
 *       0   IM     Invalid operation exception mask     1    Disabled
 *       1   DM     Denormalized operand exception mask  1    Disabled
 *       2   ZM     Zerodivide exception mask            1    Disabled
 *       3   OM     Overflow exception mask              1    Disabled
 *       4   UM     Underflow exception mask             1    Disabled
 *       5   PM     Precision exception mask             1    Disabled
 *       6   -      -                                    -    -
 *       7   IEM    Interrupt enable mask                0    Enabled
 *       8   PC     Precision control\                   1  - 64 bits
 *       9   PC     Precision control/                   1  /
 *      10   RC     Rounding control\                    0  - Nearest even
 *      11   RC     Rounding control/                    0  /
 *      12   IC     Infinity control                     1    Affine
 *      13   -      -                                    -    -
 *      14   -      -                                    -    -
 *      15   -      -                                    -    -
 *
 *
 *  TODO:
 *    - Exceptions are not implemented.
 *    - All tbyte variables should be aligned to 16-byte boundaries.
 *                (for best efficiency).
 *              - FTRAPcc code looks like broken.
 *              - If USE_3_BIT_QUOTIENT is 0, exceptions should be checked after
 *                      float -> int rounding (frem,fmod).
 *              - The speed can be greatly improved. Do this only after you are sure
 *                      that there are no major bugs.
 *              - Support for big-endian byte order (but all assembly code needs to
 *                      be rewritten anyway)
 *                      I have some non-portable code like *((uae_u16 *)&m68k_dreg(regs, reg)) = newv;
 *                      Sorry about that, you need to change these. I could do it myself, but better
 *                      not, I would have no way to test them out.
 *                      I tried to mark all spots with a comment TODO_BIGENDIAN.
 *              - to_double() may need renormalization code. Or then again, maybe not.
 *              - Signaling NANs should be handled better. The current mapping of
 *                      signaling nan exception to denormalized operand exception is only
 *                      based on the idea that the (possible) handler sees that "something
 *                      seriously wrong" and takes the same action. Should not really get (m)any
 *                      of those since normalization is handled on to_exten()
 *                      
 */

#include <math.h>
#include <stdio.h>
#include <signal.h>

#include "sysdeps.h"
#include "memory.h"
#include "readcpu.h"
#include "newcpu.h"
#define FPU_IMPLEMENTATION
#include "fpu/fpu.h"
#include "fpu/fpu_x86.h"
#include "fpu/fpu_x86_asm.h"

/* Global FPU context */
fpu_t fpu;

/* -------------------------------------------------------------------------- */
/* --- Native Support                                                     --- */
/* -------------------------------------------------------------------------- */

#include "fpu/flags.h"
#include "fpu/exceptions.h"
#include "fpu/rounding.h"
#include "fpu/impl.h"

#include "fpu/flags.cpp"
#include "fpu/exceptions.cpp"
#include "fpu/rounding.cpp"

/* -------------------------------------------------------------------------- */
/* --- Scopes Definition                                                  --- */
/* -------------------------------------------------------------------------- */

#undef  PUBLIC
#define PUBLIC  /**/

#undef  PRIVATE
#define PRIVATE static

#undef  FFPU
#define FFPU    /**/

#undef  FPU
#define FPU             fpu.

/* ---------------------------- Compatibility ---------------------------- */

#define BYTE            uint8
#define WORD            uint16
#define DWORD           uint32
#define min(a, b)       (((a) < (b)) ? (a) : (b))

/* ---------------------------- Configuration ---------------------------- */

/*
If USE_3_BIT_QUOTIENT is set to 1, FREM and FMOD use a faster version
with only 3 quotient bits (those provided by the x86 FPU). If set to 0,
they calculate the same 7 bits that m68k does. It seems (as for now) that
3 bits suffice for all Mac programs I have tried.

If you decide that you need all 7 bits (USE_3_BIT_QUOTIENT is 0),
consider checking the host exception flags after FISTP (search for
"TODO:Quotient". The result may be too large to fit into a dword.
*/
/*
gb-- I only tested the following configurations:
                USE_3_BIT_QUOTIENT                      1 -- still changes to apply if no 3-bit quotient
                FPU_DEBUG                                       1 or 0
                USE_CONSISTENCY_CHECKING        0
                I3_ON_ILLEGAL_FPU_OP            0 -- and this won't change
                I3_ON_FTRAPCC                           0 -- and this won't change
*/
#define USE_3_BIT_QUOTIENT                      1

//#define FPU_DEBUG                                     0 -- now defined in "fpu/fpu.h"
#define USE_CONSISTENCY_CHECKING        0

#define I3_ON_ILLEGAL_FPU_OP            0
#define I3_ON_FTRAPCC                           0

/* ---------------------------- Debugging ---------------------------- */

PUBLIC void FFPU fpu_dump_registers(void)
{
        for (int i = 0; i < 8; i++){
                printf ("FP%d: %g ", i, fpu_get_register(i));
                if ((i & 3) == 3)
                        printf ("\n");
        }
}

PUBLIC void FFPU fpu_dump_flags(void)
{
        printf ("N=%d Z=%d I=%d NAN=%d\n",
                (get_fpsr() & FPSR_CCB_NEGATIVE) != 0,
                (get_fpsr() & FPSR_CCB_ZERO)!= 0,
                (get_fpsr() & FPSR_CCB_INFINITY) != 0,
                (get_fpsr() & FPSR_CCB_NAN) != 0);
}

#include "debug.h"

#if FPU_DEBUG
#undef __inline__
#define __inline__

PRIVATE void FFPU dump_first_bytes_buf(char *b, uae_u8* buf, uae_s32 actual)
{
        char bb[10];
        int32 i, bytes = min(actual,100);

        *b = 0;
        for (i=0; i<bytes; i++) {
                sprintf( bb, "%02x ", (uint32)buf[i] );
                strcat( b, bb );
        }
        strcat((char*)b,"\r\n");
}

PUBLIC void FFPU dump_first_bytes(uae_u8 * buf, uae_s32 actual)
{
        char msg[256];
        dump_first_bytes_buf( msg, buf, actual );
        D(bug("%s\n", msg));
}

PRIVATE char * FFPU etos(fpu_register const & e)
{
        static char _s[10][30];
        static int _ix = 0;
        float f;

/*      _asm {
                MOV                     EDI, [e]
                FLD     TBYTE PTR [EDI]
    FSTP    DWORD PTR f
        } */
        
        __asm__ __volatile__(
                        "fldt   %1\n"
                        "fstp   %0\n"
                :       "=m" (f)
                :       "m" (e)
                );
        
        if(++_ix >= 10) _ix = 0;

        sprintf( _s[_ix], "%.04f", (float)f );
        return( _s[_ix] );
}

PUBLIC void FFPU dump_registers(const char *s)
{
        char b[512];

        sprintf(
                b,
                "%s: %s, %s, %s, %s, %s, %s, %s, %s\r\n",
                s,
                etos(FPU registers[0]),
                etos(FPU registers[1]),
                etos(FPU registers[2]),
                etos(FPU registers[3]),
                etos(FPU registers[4]),
                etos(FPU registers[5]),
                etos(FPU registers[6]),
                etos(FPU registers[7])
        );
        D(bug((char*)b));
}

#else

PUBLIC void FFPU dump_registers(const char *)
{
}

PUBLIC void FFPU dump_first_bytes(uae_u8 *, uae_s32)
{
}

#endif


/* ---------------------------- FPU consistency ---------------------------- */

#if USE_CONSISTENCY_CHECKING
PRIVATE void FFPU FPU_CONSISTENCY_CHECK_START(void)
{
/*      _asm {
          FNSTSW checked_sw_atstart
        } */
        __asm__ __volatile__("fnstsw %0" : "=m" (checked_sw_atstart));
}

PRIVATE void FFPU FPU_CONSISTENCY_CHECK_STOP(const char *name)
{
        uae_u16 checked_sw_atend;
//      _asm FNSTSW checked_sw_atend
        __asm__ __volatile__("fnstsw %0" : "=m" (checked_sw_attend));
        char msg[256];

        // Check for FPU stack overflows/underflows.
        if( (checked_sw_atend & 0x3800) != (checked_sw_atstart & 0x3800) ) {
                wsprintf(
                        msg, 
                        "FPU stack leak at %s, %X, %X\r\n", 
                        name,
                        (int)(checked_sw_atstart & 0x3800) >> 11,
                        (int)(checked_sw_atend & 0x3800) >> 11
                );
                OutputDebugString(msg);
        }

        // Observe status mapping.
        /*
        if(checked_sw_atstart != 0x400 || checked_sw_atend != 0x400) {
                wsprintf(
                        msg, "Op %s, x86_status_word before=%X, x86_status_word after=%X\r\n", 
                        name, (int)checked_sw_atstart, (int)checked_sw_atend
                );
                OutputDebugString(msg);
        }
        */
}
#else
PRIVATE void FFPU FPU_CONSISTENCY_CHECK_START(void)
{
}

PRIVATE void FFPU FPU_CONSISTENCY_CHECK_STOP(const char *)
{
}
#endif


/* ---------------------------- Status byte ---------------------------- */

// Map x86 FXAM codes -> m68k fpu status byte
#define SW_Z_I_NAN_MASK         (SW_C0|SW_C2|SW_C3)
#define SW_Z                            (SW_C3)
#define SW_I                            (SW_C0|SW_C2)
#define SW_NAN                          (SW_C0)
#define SW_FINITE                       (SW_C2)
#define SW_EMPTY_REGISTER       (SW_C0|SW_C3)
#define SW_DENORMAL                     (SW_C2|SW_C3)
#define SW_UNSUPPORTED          (0)
#define SW_N                            (SW_C1)

// Initial state after boot, reset and frestore(null frame)
#define SW_INITIAL                      SW_FINITE


/* ---------------------------- Status functions ---------------------------- */

PRIVATE void __inline__ FFPU SET_BSUN_ON_NAN ()
{
        if( (x86_status_word & (SW_Z_I_NAN_MASK)) == SW_NAN ) {
                x86_status_word |= SW_FAKE_BSUN;
                x86_status_word_accrued |= SW_IE;
        }
}

PRIVATE void __inline__ FFPU build_ex_status ()
{
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word_accrued |= x86_status_word;
        }
}

// TODO_BIGENDIAN; all of these.
/* ---------------------------- Type functions ---------------------------- */

/*
When the FPU creates a NAN, the NAN always contains the same bit pattern
in the mantissa. All bits of the mantissa are ones for any precision.
When the user creates a NAN, any nonzero bit pattern can be stored in the mantissa.
*/
PRIVATE __inline__ void FFPU MAKE_NAN (fpu_register & f)
{
        // Make it non-signaling.
        uae_u8 * p = (uae_u8 *) &f;
        memset( p, 0xFF, sizeof(fpu_register) - 1 );
        p[9] = 0x7F;
}

/*
For single- and double-precision infinities the fraction is a zero.
For extended-precision infinities, the mantissa�s MSB, the explicit
integer bit, can be either one or zero.
*/
PRIVATE __inline__ uae_u32 FFPU IS_INFINITY (fpu_register const & f)
{
        uae_u8 * p = (uae_u8 *) &f;
        if( ((p[9] & 0x7F) == 0x7F) && p[8] == 0xFF ) {
                if ((*((uae_u32 *)&p[0]) == 0) &&
                        ((*((uae_u32 *)&p[4]) & 0x7FFFFFFF) == 0))
                        return(1);
        }
        return(0);
}

PRIVATE __inline__ uae_u32 FFPU IS_NAN (fpu_register const & f)
{
        uae_u8 * p = (uae_u8 *) &f;
        if( ((p[9] & 0x7F) == 0x7F) && p[8] == 0xFF ) {
                if ((*((uae_u32 *)&p[0]) == 0) &&
                        ((*((uae_u32 *)&p[4]) & 0x7FFFFFFF) != 0))
                        return(1);
        }
        return(0);
}

PRIVATE __inline__ uae_u32 FFPU IS_ZERO (fpu_register const & f)
{
        uae_u8 * p = (uae_u8 *) &f;
        return *((uae_u32 *)p) == 0 &&
                                 *((uae_u32 *)&p[4]) == 0 &&
                                 ( *((uae_u16 *)&p[8]) & 0x7FFF ) == 0;
}

PRIVATE __inline__ void FFPU MAKE_INF_POSITIVE (fpu_register & f)
{
        uae_u8 * p = (uae_u8 *) &f;
        memset( p, 0, sizeof(fpu_register)-2 );
        *((uae_u16 *)&p[8]) = 0x7FFF;
}

PRIVATE __inline__ void FFPU MAKE_INF_NEGATIVE (fpu_register & f)
{
        uae_u8 * p = (uae_u8 *) &f;
        memset( p, 0, sizeof(fpu_register)-2 );
        *((uae_u16 *)&p[8]) = 0xFFFF;
}

PRIVATE __inline__ void FFPU MAKE_ZERO_POSITIVE (fpu_register & f)
{
        uae_u32 * const p = (uae_u32 *) &f;
        memset( p, 0, sizeof(fpu_register) );
}

PRIVATE __inline__ void FFPU MAKE_ZERO_NEGATIVE (fpu_register & f)
{
        uae_u32 * const p = (uae_u32 *) &f;
        memset( p, 0, sizeof(fpu_register) );
        *((uae_u32 *)&p[4]) = 0x80000000;
}

PRIVATE __inline__ uae_u32 FFPU IS_NEGATIVE (fpu_register const & f)
{
        uae_u8 * p = (uae_u8 *) &f;
        return( (p[9] & 0x80) != 0 );
}


/* ---------------------------- Conversions ---------------------------- */

PRIVATE void FFPU signed_to_extended ( uae_s32 x, fpu_register & f )
{
        FPU_CONSISTENCY_CHECK_START();
        
/*      _asm {
                MOV                     ESI, [f]
    FILD    DWORD PTR [x]
                FSTP    TBYTE PTR [ESI]
        } */
        
        __asm__ __volatile__("fildl %1\n\tfstpt %0" : "=m" (f) : "m" (x));
        D(bug("signed_to_extended (%X) = %s\r\n",(int)x,etos(f)));
        FPU_CONSISTENCY_CHECK_STOP("signed_to_extended");
}

PRIVATE uae_s32 FFPU extended_to_signed_32 ( fpu_register const & f )
{
        FPU_CONSISTENCY_CHECK_START();
        volatile uae_s32 tmp;
        volatile WORD sw_temp;
        
/*      _asm {
                MOV                     EDI, [f]
                FLD     TBYTE PTR [EDI]
    FISTP   DWORD PTR tmp
    FNSTSW  sw_temp
        } */

        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fistpl %0\n"
                        "fnstsw %1\n"
                :       "=m" (tmp), "=m" (sw_temp)
                :       "m" (f)
                );
        
        if(sw_temp & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                if(sw_temp & (SW_OE|SW_UE|SW_DE|SW_IE)) { // Map SW_OE to OPERR.
                        x86_status_word |= SW_IE;
                        x86_status_word_accrued |= SW_IE;
                        // Setting the value to zero might not be the right way to go,
                        // but I'll leave it like this for now.
                        tmp = 0;
                }
                if(sw_temp & SW_PE) {
                        x86_status_word |= SW_PE;
                        x86_status_word_accrued |= SW_PE;
                }
        }

        D(bug("extended_to_signed_32 (%s) = %X\r\n",etos(f),(int)tmp));
        FPU_CONSISTENCY_CHECK_STOP("extended_to_signed_32");
        return tmp;
}

PRIVATE uae_s16 FFPU extended_to_signed_16 ( fpu_register const & f )
{
        FPU_CONSISTENCY_CHECK_START();
        volatile uae_s16 tmp;
        volatile WORD sw_temp;

/*      _asm {
                MOV                     EDI, [f]
                FLD     TBYTE PTR [EDI]
    FISTP   WORD PTR tmp
    FNSTSW  sw_temp
        } */
        
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fistp  %0\n"
                        "fnstsw %1\n"
                :       "=m" (tmp), "=m" (sw_temp)
                :       "m" (f)
                );

        if(sw_temp & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                if(sw_temp & (SW_OE|SW_UE|SW_DE|SW_IE)) { // Map SW_OE to OPERR.
                        x86_status_word |= SW_IE;
                        x86_status_word_accrued |= SW_IE;
                        tmp = 0;
                }
                if(sw_temp & SW_PE) {
                        x86_status_word |= SW_PE;
                        x86_status_word_accrued |= SW_PE;
                }
        }

        D(bug("extended_to_signed_16 (%s) = %X\r\n",etos(f),(int)tmp));
        FPU_CONSISTENCY_CHECK_STOP("extended_to_signed_16");
        return tmp;
}

PRIVATE uae_s8 FFPU extended_to_signed_8 ( fpu_register const & f )
{
        FPU_CONSISTENCY_CHECK_START();
        volatile uae_s16 tmp;
        volatile WORD sw_temp;
        
/*      _asm {
                MOV                     EDI, [f]
                FLD     TBYTE PTR [EDI]
    FISTP   WORD PTR tmp
    FNSTSW  sw_temp
        } */
        
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fistp  %0\n"
                        "fnstsw %1\n"
                :       "=m" (tmp), "=m" (sw_temp)
                :       "m" (f)
                );

        if(sw_temp & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                if(sw_temp & (SW_OE|SW_UE|SW_DE|SW_IE)) { // Map SW_OE to OPERR.
                        x86_status_word |= SW_IE;
                        x86_status_word_accrued |= SW_IE;
                        tmp = 0;
                }
                if(sw_temp & SW_PE) {
                        x86_status_word |= SW_PE;
                        x86_status_word_accrued |= SW_PE;
                }
        }

        if(tmp > 127 || tmp < -128) { // OPERR
                x86_status_word |= SW_IE;
                x86_status_word_accrued |= SW_IE;
        }

        D(bug("extended_to_signed_8 (%s) = %X\r\n",etos(f),(int)tmp));
        FPU_CONSISTENCY_CHECK_STOP("extended_to_signed_8");
        return (uae_s8)tmp;
}

PRIVATE void FFPU double_to_extended ( double x, fpu_register & f )
{
        FPU_CONSISTENCY_CHECK_START();

/*      _asm {
                MOV                     EDI, [f]
    FLD     QWORD PTR [x]
                FSTP    TBYTE PTR [EDI]
        } */
        
        __asm__ __volatile__(
                        "fldl   %1\n"
                        "fstpt  %0\n"
                :       "=m" (f)
                :       "m" (x)
                );
        
        FPU_CONSISTENCY_CHECK_STOP("double_to_extended");
}

PRIVATE fpu_double FFPU extended_to_double( fpu_register const & f )
{
        FPU_CONSISTENCY_CHECK_START();
        double result;

/*      _asm {
                MOV                     ESI, [f]
                FLD     TBYTE PTR [ESI]
    FSTP    QWORD PTR result
        } */
        
        __asm__ __volatile__(
                        "fldt   %1\n"
                        "fstpl  %0\n"
                :       "=m" (result)
                :       "m" (f)
                );
        
        FPU_CONSISTENCY_CHECK_STOP("extended_to_double");
        return result;
}

PRIVATE void FFPU to_single ( uae_u32 src, fpu_register & f )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [f]
    FLD     DWORD PTR src
                FSTP    TBYTE PTR [ESI]
        } */
        
        __asm__ __volatile__(
                        "flds   %1\n"
                        "fstpt  %0\n"
                :       "=m" (f)
                :       "m" (src)
                );

        D(bug("to_single (%X) = %s\r\n",src,etos(f)));
        FPU_CONSISTENCY_CHECK_STOP("to_single");
}

// TODO_BIGENDIAN
PRIVATE void FFPU to_exten_no_normalize ( uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3, fpu_register & f )
{
        FPU_CONSISTENCY_CHECK_START();
        uae_u32 *p = (uae_u32 *)&f;

        uae_u32 sign =  (wrd1 & 0x80000000) >> 16;
        uae_u32 exp  = (wrd1 >> 16) & 0x7fff;
        p[0] = wrd3;
        p[1] = wrd2;
        *((uae_u16 *)&p[2]) = (uae_u16)(sign | exp);

        D(bug("to_exten_no_normalize (%X,%X,%X) = %s\r\n",wrd1,wrd2,wrd3,etos(f)));
        FPU_CONSISTENCY_CHECK_STOP("to_exten_no_normalize");
}

PRIVATE void FFPU to_exten ( uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3, fpu_register & f )
{
        FPU_CONSISTENCY_CHECK_START();
        uae_u32 *p = (uae_u32 *)&f;

        uae_u32 sign =  (wrd1 & 0x80000000) >> 16;
        uae_u32 exp  = (wrd1 >> 16) & 0x7fff;

        // The explicit integer bit is not set, must normalize.
        // Don't do it for zeroes, infinities or nans.
        if( (wrd2 & 0x80000000) == 0 && exp != 0 && exp != 0x7FFF ) {
                D(bug("to_exten denormalized mantissa (%X,%X,%X)\r\n",wrd1,wrd2,wrd3));
                if( wrd2 | wrd3 ) {
                        // mantissa, not fraction.
                        uae_u64 man = ((uae_u64)wrd2 << 32) | wrd3;
                        while( exp > 0 && (man & UVAL64(0x8000000000000000)) == 0 ) {
                                man <<= 1;
                                exp--;
                        }
                        wrd2 = (uae_u32)( man >> 32 );
                        wrd3 = (uae_u32)( man & 0xFFFFFFFF );
                        if( exp == 0 || (wrd2 & 0x80000000) == 0 ) {
                                // underflow
                                wrd2 = wrd3 = exp = 0;
                                sign = 0;
                        }
                } else {
                        if(exp != 0x7FFF && exp != 0) {
                                // Make a non-signaling nan.
                                exp = 0x7FFF;
                                sign = 0;
                                wrd2 = 0x80000000;
                        }
                }
        }

        p[0] = wrd3;
        p[1] = wrd2;
        *((uae_u16 *)&p[2]) = (uae_u16)(sign | exp);

        D(bug("to_exten (%X,%X,%X) = %s\r\n",wrd1,wrd2,wrd3,etos(f)));
        FPU_CONSISTENCY_CHECK_STOP("to_exten");
}

PRIVATE void FFPU to_double ( uae_u32 wrd1, uae_u32 wrd2, fpu_register & f )
{
        FPU_CONSISTENCY_CHECK_START();
        
        // gb-- make GCC happy
        union {
                uae_u64 q;
                uae_u32 l[2];
        } src;
        
        // Should renormalize if needed. I'm not sure that x86 and m68k FPU's
        // do it the sama way. This should be extremely rare however.
        // to_exten() is often called with denormalized values.

        src.l[0] = wrd2;
        src.l[1] = wrd1;

/*      _asm {
    FLD     QWORD PTR src
                MOV                     EDI, [f]
                FSTP    TBYTE PTR [EDI]
        } */
        
        __asm__ __volatile__(
                        "fldl   %1\n"
                        "fstpt  %0\n"
                :       "=m" (f)
                :       "m" (src.q)
                );

        D(bug("to_double (%X,%X) = %s\r\n",wrd1,wrd2,etos(f)));
        FPU_CONSISTENCY_CHECK_STOP("to_double");
}

PRIVATE uae_u32 FFPU from_single ( fpu_register const & f )
{
        FPU_CONSISTENCY_CHECK_START();
        volatile uae_u32 dest;
        volatile WORD sw_temp;

/*      _asm {
                MOV                     EDI, [f]
    FLD     TBYTE PTR [EDI]
                FSTP    DWORD PTR dest
    FNSTSW  sw_temp
        } */
        
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fstps  %0\n"
                        "fnstsw %1\n"
                :       "=m" (dest), "=m" (sw_temp)
                :       "m" (f)
                );

        sw_temp &= SW_EXCEPTION_MASK;
        if(sw_temp) {
//              _asm FNCLEX
                asm("fnclex");
                x86_status_word = (x86_status_word & ~SW_EXCEPTION_MASK) | sw_temp;
                x86_status_word_accrued |= sw_temp;
        }

        D(bug("from_single (%s) = %X\r\n",etos(f),dest));
        FPU_CONSISTENCY_CHECK_STOP("from_single");
        return dest;
}

// TODO_BIGENDIAN
PRIVATE void FFPU from_exten ( fpu_register const & f, uae_u32 *wrd1, uae_u32 *wrd2, uae_u32 *wrd3 )
{
        FPU_CONSISTENCY_CHECK_START();
        uae_u32 *p = (uae_u32 *)&f;
        *wrd3 = p[0];
        *wrd2 = p[1];
        *wrd1 = ( (uae_u32)*((uae_u16 *)&p[2]) ) << 16;

        D(bug("from_exten (%s) = %X,%X,%X\r\n",etos(f),*wrd1,*wrd2,*wrd3));
        FPU_CONSISTENCY_CHECK_STOP("from_exten");
}

PRIVATE void FFPU from_double ( fpu_register const & f, uae_u32 *wrd1, uae_u32 *wrd2 )
{
        FPU_CONSISTENCY_CHECK_START();
        volatile uae_u32 dest[2];
        volatile WORD sw_temp;

/*      _asm {
                MOV                     EDI, [f]
    FLD     TBYTE PTR [EDI]
                FSTP    QWORD PTR dest
    FNSTSW  sw_temp
        } */
        
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fstpl  %0\n"
                        "fnstsw %1\n"
                :       "=m" (dest), "=m" (sw_temp)
                :       "m" (f)
                );

        sw_temp &= SW_EXCEPTION_MASK;
        if(sw_temp) {
//              _asm FNCLEX
                asm("fnclex");
                x86_status_word = (x86_status_word & ~SW_EXCEPTION_MASK) | sw_temp;
                x86_status_word_accrued |= sw_temp;
        }

        // TODO: There is a partial memory stall, nothing happens until FSTP retires.
        // On PIII, could use MMX move w/o any penalty.
        *wrd2 = dest[0];
        *wrd1 = dest[1];

        D(bug("from_double (%s) = %X,%X\r\n",etos(f),dest[1],dest[0]));
        FPU_CONSISTENCY_CHECK_STOP("from_double");
}

PRIVATE void FFPU do_fmove ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        FPU_CONSISTENCY_CHECK_STOP("do_fmove");
}

/*
PRIVATE void FFPU do_fmove_no_status ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FSTP    TBYTE PTR [EDI]
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fmove_no_status");
}
*/


/* ---------------------------- Operations ---------------------------- */

PRIVATE void FFPU do_fint ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FRNDINT
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "frndint\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fint");
}

PRIVATE void FFPU do_fintrz ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        WORD cw_temp;

/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
                FSTCW   cw_temp
                and                     cw_temp, ~X86_ROUNDING_MODE
                or                      cw_temp, CW_RC_ZERO
    FLDCW   cw_temp
    FLD     TBYTE PTR [ESI]
                FRNDINT
                FXAM
    FNSTSW  x86_status_word
    FLDCW   x86_control_word
                FSTP    TBYTE PTR [EDI]
        } */
        
        __asm__ __volatile__(
                        "fstcw  %0\n"
                        "andl   $(~X86_ROUNDING_MODE), %0\n"
                        "orl    $CW_RC_ZERO, %0\n"
                        "fldcw  %0\n"
                        "fldt   %3\n"
                        "frndint\n"
                        "fxam   \n"
                        "fnstsw %1\n"
                        "fldcw  %4\n"
                        "fstpt  %2\n"
                :       "+m" (cw_temp), "=m" (x86_status_word), "=m" (dest)
                :       "m" (src), "m" (x86_control_word)
                );
        
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fintrz");
}

PRIVATE void FFPU do_fsqrt ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FSQRT
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fsqrt  \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fsqrt");
}

PRIVATE void FFPU do_ftst ( fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
    FLD     TBYTE PTR [ESI]
                FXAM
    FNSTSW  x86_status_word
                FSTP    ST(0)
        } */
        
        __asm__ __volatile__(
                        "fldt   %1\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstp   %%st(0)\n"
                :       "=m" (x86_status_word)
                :       "m" (src)
                );
        
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~SW_EXCEPTION_MASK;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_ftst");
}

// These functions are calculated in 53 bits accuracy only.
// Exception checking is not complete.
PRIVATE void FFPU do_fsinh ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = sinh(x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_fsinh");
}

PRIVATE void FFPU do_flognp1 ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = log (x + 1.0);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_flognp1");
}

PRIVATE void FFPU do_fetoxm1 ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = exp (x) - 1.0;
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_fetoxm1");
}

PRIVATE void FFPU do_ftanh ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = tanh (x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_ftanh");
}

PRIVATE void FFPU do_fatan ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = atan (x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_fatan");
}

PRIVATE void FFPU do_fasin ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = asin (x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_fasin");
}

PRIVATE void FFPU do_fatanh ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = log ((1 + x) / (1 - x)) / 2;
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_fatanh");
}

PRIVATE void FFPU do_fetox ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = exp (x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_fetox");
}

PRIVATE void FFPU do_ftwotox ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = pow(2.0, x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_ftwotox");
}

PRIVATE void FFPU do_ftentox ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = pow(10.0, x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_ftentox");
}

PRIVATE void FFPU do_flogn ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = log (x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_flogn");
}

PRIVATE void FFPU do_flog10 ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = log10 (x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_flog10");
}

PRIVATE void FFPU do_flog2 ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = log (x) / log (2.0);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_flog2");
}

PRIVATE void FFPU do_facos ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = acos(x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_facos");
}

PRIVATE void FFPU do_fcosh ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        double x, y;
        x = extended_to_double( src );
        y = cosh(x);
        double_to_extended( y, dest );
        do_ftst( dest );
        FPU_CONSISTENCY_CHECK_STOP("do_fcosh");
}

PRIVATE void FFPU do_fsin ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FSIN
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fsin   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fsin");
}

// TODO: Should check for out-of-range condition (partial tangent)
PRIVATE void FFPU do_ftan ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FPTAN
                FSTP    ST(0)   ; pop 1.0 (the 8087/287 compatibility thing)
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fptan  \n"
                        "fstp   %%st(0)\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_PE - SW_UE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_ftan");
}

PRIVATE void FFPU do_fabs ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FABS
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fabs   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        // x86 fabs should not rise any exceptions (except stack underflow)
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~SW_EXCEPTION_MASK;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fabs");
}

PRIVATE void FFPU do_fneg ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FCHS
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fchs   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        // x86 fchs should not rise any exceptions (except stack underflow)
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~SW_EXCEPTION_MASK;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fneg");
}

PRIVATE void FFPU do_fcos ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FCOS
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fcos   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fcos");
}

PRIVATE void FFPU do_fgetexp ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FXTRACT
                FSTP    ST(0)                                           ; pop mantissa
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fxtract\n"
                        "fstp   %%st(0)\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~SW_EXCEPTION_MASK;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fgetexp");
}

PRIVATE void FFPU do_fgetman ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
                FXTRACT
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)                                           ; pop exponent
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fxtract\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                        "fstp   %%st(0)\n"
                :       "=m" (x86_status_word), "=m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~SW_EXCEPTION_MASK;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fgetman");
}

PRIVATE void FFPU do_fdiv ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FDIV            ST(0),ST(1)
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fldt   %1\n"
                        "fdiv   %%st(1), %%st(0)\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                        "fstp   %%st(0)\n"
                :       "=m" (x86_status_word), "+m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fdiv");
}

// The sign of the quotient is the exclusive-OR of the sign bits
// of the source and destination operands.
// Quotient Byte is loaded with the sign and least significant
// seven bits of the quotient.

PRIVATE void FFPU do_fmod ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();

        volatile uint16 status;
        uae_u32 quot;
#if !USE_3_BIT_QUOTIENT
        WORD cw_temp;
#endif
        
        uae_u8 * dest_p = (uae_u8 *)&dest;
        uae_u8 * src_p = (uae_u8 *)&src;
        uae_u32 sign = (dest_p[9] ^ src_p[9]) & 0x80;

/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]

#if !USE_3_BIT_QUOTIENT
                MOV                     CX, x86_control_word
                AND                     CX, ~X86_ROUNDING_MODE
                OR                      CX, CW_RC_ZERO
                MOV                     cw_temp, CX
    FLDCW   cw_temp

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]
                FDIV            ST(0),ST(1)
                FABS
    FISTP   DWORD PTR quot
                FSTP    ST(0)
    FLDCW   x86_control_word
                // TODO:Quotient
                // Should clear any possible exceptions here
#endif

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]

// loop until the remainder is not partial any more.
partial_loop:
                FPREM
                FNSTSW  status
                TEST            status, SW_C2
                JNE                     partial_loop


                FXAM
    FNSTSW  x86_status_word

                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        } */
        
#if !USE_3_BIT_QUOTIENT
        
        __asm__ __volatile__(
                        "movl   %6, %%ecx\n"    // %6: x86_control_word         (read)
                        "andl   $(~X86_ROUNDING_MODE), %%ecx\n"
                        "orl    $CW_RC_ZERO, %%ecx\n"
                        "movl   %%ecx, %0\n"    // %0: cw_temp  (read/write)
                        "fldcw  %0\n"
                        "fldt   %5\n"
                        "fldt   %4\n"
                        "fdiv   %%st(1), %%st(0)\n"
                        "fabs   \n"
                        "fistpl %1\n"                   // %1: quot             (read/write)
                        "fstp   %%st(0)\n"
                        "fldcw  %6\n"
                        "fldt   %5\n"
                        "fldt   %4\n"
                        "0:\n"                                  // partial_loop
                        "fprem  \n"
                        "fnstsw %2\n"                   // %2: status   (read/write)
                        "testl  $SW_C2, %2\n"
                        "jne    0b\n"
                        "fxam   \n"
                        "fnstsw %3\n"                   // %3: x86_status_word          (write)
                        "fstpt  %4\n"
                        "fstp   %%st(0)\n"
                :       "+m" (cw_temp), "+m" (quot), "+m" (status), "=m" (x86_status_word), "+m" (dest)
                :       "m" (src), "m" (x86_control_word)
                :       "ecx"
                );
        
#else
        
        __asm__ __volatile__(
                        "fldt   %3\n"
                        "fldt   %2\n"
                        "0:\n"                                  // partial_loop
                        "fprem  \n"
                        "fnstsw %0\n"                   // %0: status   (read/write)
                        "testl  $SW_C2, %0\n"
                        "jne    0b\n"
                        "fxam   \n"
                        "fnstsw %1\n"                   // %1: x86_status_word          (write)
                        "fstpt  %2\n"
                        "fstp   %%st(0)\n"
                :       "+m" (status), "=m" (x86_status_word), "+m" (dest)
                :       "m" (src)
                );
        
#endif
        
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_UE);
                x86_status_word_accrued |= x86_status_word;
        }

#if USE_3_BIT_QUOTIENT
        // SW_C1 Set to least significant bit of quotient (Q0).
        // SW_C3 Set to bit 1 (Q1) of the quotient.
        // SW_C0 Set to bit 2 (Q2) of the quotient.
        quot = ((status & SW_C0) >> 6) | ((status & SW_C3) >> 13) | ((status & SW_C1) >> 9);
        FPU fpsr.quotient = (sign | quot) << 16;
#else
        FPU fpsr.quotient = (sign | (quot&0x7F)) << 16;
#endif

        FPU_CONSISTENCY_CHECK_STOP("do_fmod");
}

PRIVATE void FFPU do_frem ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();

        volatile uint16 status;
        uae_u32 quot;
#if !USE_3_BIT_QUOTIENT
        WORD cw_temp;
#endif

        uae_u8 * dest_p = (uae_u8 *)&dest;
        uae_u8 * src_p = (uae_u8 *)&src;
        uae_u32 sign = (dest_p[9] ^ src_p[9]) & 0x80;

/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]

#if !USE_3_BIT_QUOTIENT
                MOV                     CX, x86_control_word
                AND                     CX, ~X86_ROUNDING_MODE
                OR                      CX, CW_RC_NEAR
                MOV                     cw_temp, CX
    FLDCW   cw_temp

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]
                FDIV            ST(0),ST(1)
                FABS
    FISTP   DWORD PTR quot
                FSTP    ST(0)
    FLDCW   x86_control_word
                // TODO:Quotient
                // Should clear any possible exceptions here
#endif

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]

// loop until the remainder is not partial any more.
partial_loop:
                FPREM1
                FNSTSW  status
                TEST            status, SW_C2
                JNE                     partial_loop

                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        } */

#if !USE_3_BIT_QUOTIENT
        
        __asm__ __volatile__(
                        "movl   %6, %%ecx\n"    // %6: x86_control_word         (read)
                        "andl   $(~X86_ROUNDING_MODE), %%ecx\n"
                        "orl    $CW_RC_NEAR, %%ecx\n"
                        "movl   %%ecx, %0\n"    // %0: cw_temp  (read/write)
                        "fldcw  %0\n"
                        "fldt   %5\n"
                        "fldt   %4\n"
                        "fdiv   %%st(1), %%st(0)\n"
                        "fabs   \n"
                        "fistpl %1\n"                   // %1: quot             (read/write)
                        "fstp   %%st(0)\n"
                        "fldcw  %6\n"
                        "fldt   %5\n"
                        "fldt   %4\n"
                        "0:\n"                                  // partial_loop
                        "fprem1 \n"
                        "fnstsw %2\n"                   // %2: status   (read/write)
                        "testl  $SW_C2, %2\n"
                        "jne    0b\n"
                        "fxam   \n"
                        "fnstsw %3\n"                   // %3: x86_status_word          (write)
                        "fstpt  %4\n"
                        "fstp   %%st(0)\n"
                :       "+m" (cw_temp), "+m" (quot), "+m" (status), "=m" (x86_status_word), "+m" (dest)
                :       "m" (src), "m" (x86_control_word)
                :       "ecx"
                );
        
#else
        
        __asm__ __volatile__(
                        "fldt   %3\n"
                        "fldt   %2\n"
                        "0:\n"                                  // partial_loop
                        "fprem1 \n"
                        "fnstsw %0\n"                   // %0: status   (read/write)
                        "testl  $SW_C2, %0\n"
                        "jne    0b\n"
                        "fxam   \n"
                        "fnstsw %1\n"                   // %1: x86_status_word          (write)
                        "fstpt  %2\n"
                        "fstp   %%st(0)\n"
                :       "+m" (status), "=m" (x86_status_word), "+m" (dest)
                :       "m" (src)
                );
        
#endif
        
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_UE);
                x86_status_word_accrued |= x86_status_word;
        }

#if USE_3_BIT_QUOTIENT
        // SW_C1 Set to least significant bit of quotient (Q0).
        // SW_C3 Set to bit 1 (Q1) of the quotient.
        // SW_C0 Set to bit 2 (Q2) of the quotient.
        quot = ((status & SW_C0) >> 6) | ((status & SW_C3) >> 13) | ((status & SW_C1) >> 9);
        FPU fpsr.quotient = (sign | quot) << 16;
#else
        FPU fpsr.quotient = (sign | (quot&0x7F)) << 16;
#endif

        FPU_CONSISTENCY_CHECK_STOP("do_frem");
}

// Faster versions. The current rounding mode is already correct.
#if !USE_3_BIT_QUOTIENT
PRIVATE void FFPU do_fmod_dont_set_cw ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();

        volatile uint16 status;
        uae_u32 quot;

        uae_u8 * dest_p = (uae_u8 *)&dest;
        uae_u8 * src_p = (uae_u8 *)&src;
        uae_u32 sign = (dest_p[9] ^ src_p[9]) & 0x80;

        _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]
                FDIV            ST(0),ST(1)
                FABS
    FISTP   DWORD PTR quot
                FSTP    ST(0)
                // TODO:Quotient
                // Should clear any possible exceptions here

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]

// loop until the remainder is not partial any more.
partial_loop:
                FPREM
                FNSTSW  status
                TEST            status, SW_C2
                JNE                     partial_loop

                FXAM
    FNSTSW  x86_status_word

                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        }
        if(x86_status_word & SW_EXCEPTION_MASK) {
                _asm FNCLEX
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_UE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU fpsr.quotient = (sign | (quot&0x7F)) << 16;
        FPU_CONSISTENCY_CHECK_STOP("do_fmod_dont_set_cw");
}

PRIVATE void FFPU do_frem_dont_set_cw ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();

        volatile uint16 status;
        uae_u32 quot;

        uae_u8 * dest_p = (uae_u8 *)&dest;
        uae_u8 * src_p = (uae_u8 *)&src;
        uae_u32 sign = (dest_p[9] ^ src_p[9]) & 0x80;

        _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]
                FDIV            ST(0),ST(1)
                FABS
    FISTP   DWORD PTR quot
                FSTP    ST(0)
                // TODO:Quotient
                // Should clear any possible exceptions here

                FLD     TBYTE PTR [ESI]
                FLD     TBYTE PTR [EDI]

// loop until the remainder is not partial any more.
partial_loop:
                FPREM1
                FNSTSW  status
                TEST            status, SW_C2
                JNE                     partial_loop

                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        }
        if(x86_status_word & SW_EXCEPTION_MASK) {
                _asm FNCLEX
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_UE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU fpsr.quotient = (sign | (quot&0x7F)) << 16;
        FPU_CONSISTENCY_CHECK_STOP("do_frem_dont_set_cw");
}
#endif //USE_3_BIT_QUOTIENT

PRIVATE void FFPU do_fadd ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FADD
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fldt   %1\n"
                        "fadd   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "+m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_UE - SW_OE - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fadd");
}

PRIVATE void FFPU do_fmul ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FMUL
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fldt   %1\n"
                        "fmul   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "+m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fmul");
}

PRIVATE void FFPU do_fsgldiv ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        WORD cw_temp;
/*      _asm {
                FSTCW   cw_temp
                and                     cw_temp, ~X86_ROUNDING_PRECISION
                or                      cw_temp, PRECISION_CONTROL_SINGLE
    FLDCW   cw_temp

                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FDIV            ST(0),ST(1)
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
    FLDCW   x86_control_word
        } */
        __asm__ __volatile__(
                        "fstcw  %0\n"
                        "andl   $(~X86_ROUNDING_PRECISION), %0\n"
                        "orl    $PRECISION_CONTROL_SINGLE, %0\n"
                        "fldcw  %0\n"
                        "fldt   %3\n"
                        "fldt   %2\n"
                        "fdiv   %%st(1), %%st(0)\n"
                        "fxam   \n"
                        "fnstsw %1\n"
                        "fstpt  %2\n"
                        "fstp   %%st(0)\n"
                        "fldcw  %4\n"
                :       "+m" (cw_temp), "=m" (x86_status_word), "+m" (dest)
                :       "m" (src), "m" (x86_control_word)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fsgldiv");
}

PRIVATE void FFPU do_fscale ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FSCALE
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fldt   %1\n"
                        "fscale \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                        "fstp   %%st(0)\n"
                :       "=m" (x86_status_word), "+m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_UE - SW_OE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fscale");
}

PRIVATE void FFPU do_fsglmul ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
        WORD cw_temp;

/*      _asm {
                FSTCW   cw_temp
                and                     cw_temp, ~X86_ROUNDING_PRECISION
                or                      cw_temp, PRECISION_CONTROL_SINGLE
    FLDCW   cw_temp

                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FMUL
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]

    FLDCW   x86_control_word
        } */
        __asm__ __volatile__(
                        "fstcw  %0\n"
                        "andl   $(~X86_ROUNDING_PRECISION), %0\n"
                        "orl    $PRECISION_CONTROL_SINGLE, %0\n"
                        "fldcw  %0\n"
                        "fldt   %3\n"
                        "fldt   %2\n"
                        "fmul   \n"
                        "fxam   \n"
                        "fnstsw %1\n"
                        "fstpt  %2\n"
                        "fldcw  %4\n"
                :       "+m" (cw_temp), "=m" (x86_status_word), "+m" (dest)
                :       "m" (src), "m" (x86_status_word)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fsglmul");
}

PRIVATE void FFPU do_fsub ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FSUB            ST(0),ST(1)
                FXAM
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fldt   %1\n"
                        "fsub   %%st(1), %%st(0)\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                        "fstp   %%st(0)\n"
                :       "=m" (x86_status_word), "+m" (dest)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_UE - SW_OE - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fsub");
}

PRIVATE void FFPU do_fsincos ( fpu_register & dest_sin, fpu_register & dest_cos, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest_cos]
    FLD     TBYTE PTR [ESI]
                FSINCOS
                FSTP    TBYTE PTR [EDI]
                FXAM
                MOV                     EDI, [dest_sin]
    FNSTSW  x86_status_word
                FSTP    TBYTE PTR [EDI]
                FSTP    ST(0)
        } */
        __asm__ __volatile__(
                        "fldt   %3\n"
                        "fsincos\n"
                        "fstpt  %1\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %2\n"
                        "fstp   %%st(0)\n"
                :       "=m" (x86_status_word), "=m" (dest_cos), "=m" (dest_sin)
                :       "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~(SW_EXCEPTION_MASK - SW_IE - SW_UE - SW_PE);
                x86_status_word_accrued |= x86_status_word;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fsincos");
}

PRIVATE void FFPU do_fcmp ( fpu_register & dest, fpu_register const & src )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                MOV                     ESI, [src]
                MOV                     EDI, [dest]
    FLD     TBYTE PTR [ESI]
    FLD     TBYTE PTR [EDI]
                FSUB    ST(0),ST(1)
                FXAM
    FNSTSW  x86_status_word
                FSTP    ST(0)
                FSTP    ST(0)
        } */
        __asm__ __volatile__(
                        "fldt   %2\n"
                        "fldt   %1\n"
                        "fsub   %%st(1), %%st(0)\n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstp   %%st(0)\n"
                        "fstp   %%st(0)\n"
                :       "=m" (x86_status_word)
                :       "m" (dest), "m" (src)
                );
        if(x86_status_word & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                x86_status_word &= ~SW_EXCEPTION_MASK;
        }
        FPU_CONSISTENCY_CHECK_STOP("do_fcmp");
}

// More or less original. Should be reviewed.
PRIVATE fpu_double FFPU to_pack(uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3)
{
        FPU_CONSISTENCY_CHECK_START();

  double d;
  char *cp;
  char str[100];

  cp = str;
  if (wrd1 & 0x80000000)
                *cp++ = '-';
  *cp++ = (char)((wrd1 & 0xf) + '0');
  *cp++ = '.';
  *cp++ = (char)(((wrd2 >> 28) & 0xf) + '0');
  *cp++ = (char)(((wrd2 >> 24) & 0xf) + '0');
  *cp++ = (char)(((wrd2 >> 20) & 0xf) + '0');
  *cp++ = (char)(((wrd2 >> 16) & 0xf) + '0');
  *cp++ = (char)(((wrd2 >> 12) & 0xf) + '0');
  *cp++ = (char)(((wrd2 >> 8) & 0xf) + '0');
  *cp++ = (char)(((wrd2 >> 4) & 0xf) + '0');
  *cp++ = (char)(((wrd2 >> 0) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 28) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 24) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 20) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 16) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 12) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 8) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 4) & 0xf) + '0');
  *cp++ = (char)(((wrd3 >> 0) & 0xf) + '0');
  *cp++ = 'E';
  if (wrd1 & 0x40000000)
                *cp++ = '-';
  *cp++ = (char)(((wrd1 >> 24) & 0xf) + '0');
  *cp++ = (char)(((wrd1 >> 20) & 0xf) + '0');
  *cp++ = (char)(((wrd1 >> 16) & 0xf) + '0');
  *cp = 0;
  sscanf(str, "%le", &d);

        D(bug("to_pack str = %s\r\n",str));

        D(bug("to_pack(%X,%X,%X) = %.04f\r\n",wrd1,wrd2,wrd3,(float)d));

        FPU_CONSISTENCY_CHECK_STOP("to_pack");

  return d;
}

// More or less original. Should be reviewed.
PRIVATE void FFPU from_pack (fpu_double src, uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3)
{
        FPU_CONSISTENCY_CHECK_START();

  int i;
  int t;
  char *cp;
  char str[100];
  int exponent_digit_count = 0;

  sprintf(str, "%.16e", src);

        D(bug("from_pack(%.04f,%s)\r\n",(float)src,str));

  cp = str;
  *wrd1 = *wrd2 = *wrd3 = 0;
  if (*cp == '-') {
                cp++;
                *wrd1 = 0x80000000;
  }
  if (*cp == '+')
                cp++;
  *wrd1 |= (*cp++ - '0');
  if (*cp == '.')
                cp++;
  for (i = 0; i < 8; i++) {
                *wrd2 <<= 4;
                if (*cp >= '0' && *cp <= '9')
            *wrd2 |= *cp++ - '0';
  }
  for (i = 0; i < 8; i++) {
                *wrd3 <<= 4;
                if (*cp >= '0' && *cp <= '9')
            *wrd3 |= *cp++ - '0';
  }
  if (*cp == 'e' || *cp == 'E') {
                cp++;
                if (*cp == '-') {
                        cp++;
                        *wrd1 |= 0x40000000;
                }
                if (*cp == '+')
                        cp++;
                t = 0;
                for (i = 0; i < 3; i++) {
                        if (*cp >= '0' && *cp <= '9') {
                                t = (t << 4) | (*cp++ - '0');
                                exponent_digit_count++;
                        }
                }
                *wrd1 |= t << 16;
  }

        D(bug("from_pack(%.04f) = %X,%X,%X\r\n",(float)src,*wrd1,*wrd2,*wrd3));

        WORD sw_temp;
//      _asm FNSTSW sw_temp
        __asm__ __volatile__("fnstsw %0" : "=m" (sw_temp));
        if(sw_temp & SW_EXCEPTION_MASK) {
//              _asm FNCLEX
                __asm__ __volatile__("fnclex");
                if(sw_temp & SW_PE) {
                        x86_status_word |= SW_PE;
                        x86_status_word_accrued |= SW_PE;
                }
        }

        /*
        OPERR is set if the k-factor > + 17 or the magnitude of
        the decimal exponent exceeds three digits;
        cleared otherwise.
        */
        if(exponent_digit_count > 3) {
                x86_status_word |= SW_IE;
                x86_status_word_accrued |= SW_IE;
        }

        FPU_CONSISTENCY_CHECK_STOP("from_pack");
}

PRIVATE int FFPU get_fp_value (uae_u32 opcode, uae_u32 extra, fpu_register & src)
{
        static const int sz1[8] = {4, 4, 12, 12, 2, 8, 1, 0};
        static const int sz2[8] = {4, 4, 12, 12, 2, 8, 2, 0};

        // D(bug("get_fp_value(%X,%X)\r\n",(int)opcode,(int)extra));
        // dump_first_bytes( regs.pc_p-4, 16 );

  if ((extra & 0x4000) == 0) {
                memcpy( &src, &FPU registers[(extra >> 10) & 7], sizeof(fpu_register) );
//              do_fmove_no_status( src, FPU registers[(extra >> 10) & 7] );
                return 1;
  }

        int mode = (opcode >> 3) & 7;
  int reg = opcode & 7;
  int size = (extra >> 10) & 7;
  uae_u32 ad = 0;

        // D(bug("get_fp_value mode=%d, reg=%d, size=%d\r\n",(int)mode,(int)reg,(int)size));

  switch ((uae_u8)mode) {
    case 0:
                        switch ((uae_u8)size) {
                                case 6:
                                        signed_to_extended( (uae_s32)(uae_s8) m68k_dreg (regs, reg), src );
                                        break;
                                case 4:
                                        signed_to_extended( (uae_s32)(uae_s16) m68k_dreg (regs, reg), src );
                                        break;
                                case 0:
                                        signed_to_extended( (uae_s32) m68k_dreg (regs, reg), src );
                                        break;
                                case 1:
                                        to_single( m68k_dreg (regs, reg), src );
                                        break;
                                default:
                                        return 0;
                        }
                        return 1;
    case 1:
                        return 0;
    case 2:
                        ad = m68k_areg (regs, reg);
                        break;
    case 3:
                        ad = m68k_areg (regs, reg);
                        m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size];
                        break;
    case 4:
                        m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size];
                        ad = m68k_areg (regs, reg);
                        break;
    case 5:
                        ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword();
                        break;
    case 6:
                        ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword());
                        break;
    case 7:
                        switch ((uae_u8)reg) {
                                case 0:
                            ad = (uae_s32) (uae_s16) next_iword();
                                        break;
                                case 1:
                                        ad = next_ilong();
                                        break;
                                case 2:
                                        ad = m68k_getpc ();
                                        ad += (uae_s32) (uae_s16) next_iword();
                                        break;
                                case 3: {
                                        uaecptr tmppc = m68k_getpc ();
                                        uae_u16 tmp = (uae_u16)next_iword();
                                        ad = get_disp_ea_020 (tmppc, tmp);
                                        }
                                        break;
                                case 4:
                                        ad = m68k_getpc ();
                                        m68k_setpc (ad + sz2[size]);

                                        /*
                                        +0000  000004  FSCALE.B   #$01,FP2     | F23C 5926 0001
                                        F23C 1111001000111100
                                        5926 0101100100100110
                                        0001 0000000000000001
                                        mode = 7
                                        reg  = 4
                                        size = 6
                                        */
                                        // Immediate addressing mode && Operation Length == Byte -> 
                                        // Use the low-order byte of the extension word.

                                        if(size == 6) ad++;
                                        
                                        // May be faster on a PII(I), sz2[size] is already in register
                                        // ad += sz2[size] - sz1[size];

                                        break;
                                default:
                                        return 0;
                        }
  }

  switch ((uae_u8)size) {
    case 0:
                        signed_to_extended( (uae_s32) get_long (ad), src );
                        break;
    case 1:
                        to_single( get_long (ad), src );
                        break;

    case 2:{
            uae_u32 wrd1, wrd2, wrd3;
            wrd1 = get_long (ad);
            ad += 4;
            wrd2 = get_long (ad);
            ad += 4;
            wrd3 = get_long (ad);
                        to_exten( wrd1, wrd2, wrd3, src );
                        }
                        break;
    case 3:{
            uae_u32 wrd1, wrd2, wrd3;
            wrd1 = get_long (ad);
            ad += 4;
            wrd2 = get_long (ad);
            ad += 4;
            wrd3 = get_long (ad);
                        double_to_extended( to_pack(wrd1, wrd2, wrd3), src );
                        }
                        break;
    case 4:
                        signed_to_extended( (uae_s32)(uae_s16) get_word(ad), src );
                        break;
    case 5:{
            uae_u32 wrd1, wrd2;
            wrd1 = get_long (ad);
            ad += 4;
            wrd2 = get_long (ad);
                        to_double(wrd1, wrd2, src);
                        }
                        break;
    case 6:
                        signed_to_extended( (uae_s32)(uae_s8) get_byte(ad), src );
                        break;
    default:
                        return 0;
  }

        // D(bug("get_fp_value result = %.04f\r\n",(float)src));

  return 1;
}

PRIVATE int FFPU put_fp_value (fpu_register const & value, uae_u32 opcode, uae_u32 extra)
{
        static const int sz1[8] = {4, 4, 12, 12, 2, 8, 1, 0};
        static const int sz2[8] = {4, 4, 12, 12, 2, 8, 2, 0};

        // D(bug("put_fp_value(%.04f,%X,%X)\r\n",(float)value,(int)opcode,(int)extra));

  if ((extra & 0x4000) == 0) {
                int dest_reg = (extra >> 10) & 7;
                do_fmove( FPU registers[dest_reg], value );
                build_ex_status();
                return 1;
  }

  int mode = (opcode >> 3) & 7;
  int reg = opcode & 7;
  int size = (extra >> 10) & 7;
  uae_u32 ad = 0xffffffff;

        // Clear exception status
        x86_status_word &= ~SW_EXCEPTION_MASK;

  switch ((uae_u8)mode) {
    case 0:
                        switch ((uae_u8)size) {
                                case 6:
                                        *((uae_u8 *)&m68k_dreg(regs, reg)) = extended_to_signed_8(value);
                                        break;
                                case 4:
                                        // TODO_BIGENDIAN
                                        *((uae_u16 *)&m68k_dreg(regs, reg)) = extended_to_signed_16(value);
                                        break;
                                case 0:
                                        m68k_dreg (regs, reg) = extended_to_signed_32(value);
                                        break;
                                case 1:
                                        m68k_dreg (regs, reg) = from_single(value);
                                        break;
                                default:
                                        return 0;
                        }
                        return 1;
                case 1:
                        return 0;
    case 2:
                        ad = m68k_areg (regs, reg);
                        break;
    case 3:
                        ad = m68k_areg (regs, reg);
                        m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size];
                        break;
    case 4:
                        m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size];
                        ad = m68k_areg (regs, reg);
                        break;
    case 5:
                        ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword();
                        break;
    case 6:
                        ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword());
                        break;
    case 7:
                        switch ((uae_u8)reg) {
                                case 0:
                                        ad = (uae_s32) (uae_s16) next_iword();
                                        break;
                                case 1:
                                        ad = next_ilong();
                                        break;
                                case 2:
                                        ad = m68k_getpc ();
                                        ad += (uae_s32) (uae_s16) next_iword();
                                        break;
                                case 3: {
                                        uaecptr tmppc = m68k_getpc ();
                                        uae_u16 tmp = (uae_u16)next_iword();
                                        ad = get_disp_ea_020 (tmppc, tmp);
                                        }
                                        break;
                                case 4:
                                        ad = m68k_getpc ();
                                        m68k_setpc (ad + sz2[size]);
                                        break;
                                default:
                                        return 0;
                        }
  }
  switch ((uae_u8)size) {
    case 0:
                        put_long (ad, (uae_s32) extended_to_signed_32(value));
                        break;
    case 1:
                        put_long (ad, from_single(value));
                        break;
                case 2: {
                        uae_u32 wrd1, wrd2, wrd3;
                        from_exten(value, &wrd1, &wrd2, &wrd3);
                        
                        x86_status_word &= ~SW_EXCEPTION_MASK;
                        if(wrd3) { // TODO: not correct! Just a "smart" guess.
                                x86_status_word |= SW_PE;
                                x86_status_word_accrued |= SW_PE;
                        }

                        put_long (ad, wrd1);
                        ad += 4;
                        put_long (ad, wrd2);
                        ad += 4;
                        put_long (ad, wrd3);
                        }
                        break;
    case 3: {
                        uae_u32 wrd1, wrd2, wrd3;
                        from_pack(extended_to_double(value), &wrd1, &wrd2, &wrd3);
                        put_long (ad, wrd1);
                        ad += 4;
                        put_long (ad, wrd2);
                        ad += 4;
                        put_long (ad, wrd3);
                        }
                        break;
                case 4:
                        put_word(ad, extended_to_signed_16(value));
                        break;
    case 5:{
            uae_u32 wrd1, wrd2;
            from_double(value, &wrd1, &wrd2);
            put_long (ad, wrd1);
            ad += 4;
            put_long (ad, wrd2);
                        }
                        break;
    case 6:
                        put_byte(ad, extended_to_signed_8(value));

                        break;
    default:
                        return 0;
  }
  return 1;
}

PRIVATE int FFPU get_fp_ad(uae_u32 opcode, uae_u32 * ad)
{
  int mode = (opcode >> 3) & 7;
  int reg = opcode & 7;
  switch ( (uae_u8)mode ) {
    case 0:
    case 1:
        if( (opcode & 0xFF00) == 0xF300 ) {
                // fsave, frestore
                                m68k_setpc (m68k_getpc () - 2);
        } else {
                                m68k_setpc (m68k_getpc () - 4);
        }
                        op_illg (opcode);
                        dump_registers( "END  ");
                        return 0;
    case 2:
                        *ad = m68k_areg (regs, reg);
                        break;
    case 3:
                        *ad = m68k_areg (regs, reg);
                        break;
    case 4:
                        *ad = m68k_areg (regs, reg);
                        break;
    case 5:
                        *ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword();
                        break;
    case 6:
                        *ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword());
                        break;
    case 7:
                        switch ( (uae_u8)reg ) {
                                case 0:
                                        *ad = (uae_s32) (uae_s16) next_iword();
                                        break;
                                case 1:
                                        *ad = next_ilong();
                                        break;
                                case 2:
                                        *ad = m68k_getpc ();
                                        *ad += (uae_s32) (uae_s16) next_iword();
                                        break;
                                case 3: {
                                        uaecptr tmppc = m68k_getpc ();
                                        uae_u16 tmp = (uae_u16)next_iword();
                                        *ad = get_disp_ea_020 (tmppc, tmp);
                                        }
                                        break;
                                default:
                                        if( (opcode & 0xFF00) == 0xF300 ) {
                                                // fsave, frestore
                                                m68k_setpc (m68k_getpc () - 2);
                                        } else {
                                                m68k_setpc (m68k_getpc () - 4);
                                        }
                                        op_illg (opcode);
                                        dump_registers( "END  ");
                                        return 0;
                        }
  }
  return 1;
}

#if FPU_DEBUG
#define CONDRET(s,x) D(bug("fpp_cond %s = %d\r\n",s,(uint32)(x))); return (x)
#else
#define CONDRET(s,x) return (x)
#endif

PRIVATE int FFPU fpp_cond(uae_u32 opcode, int condition)
{

#define N                               (x86_status_word & SW_N)
#define Z                               ((x86_status_word & (SW_Z_I_NAN_MASK)) == SW_Z)
#define I                               ((x86_status_word & (SW_Z_I_NAN_MASK)) == (SW_I))
#define NotANumber              ((x86_status_word & (SW_Z_I_NAN_MASK)) == SW_NAN)

  switch (condition) {
                // Common Tests, no BSUN
    case 0x01:
                        CONDRET("Equal",Z);
    case 0x0e:
                        CONDRET("Not Equal",!Z);

                // IEEE Nonaware Tests, BSUN
    case 0x12:
                        SET_BSUN_ON_NAN();
                        CONDRET("Greater Than",!(NotANumber || Z || N));
    case 0x1d:
                        SET_BSUN_ON_NAN();
                        CONDRET("Not Greater Than",NotANumber || Z || N);
    case 0x13:
                        SET_BSUN_ON_NAN();
                        CONDRET("Greater Than or Equal",Z || !(NotANumber || N));
    case 0x1c:
                        SET_BSUN_ON_NAN();
                        CONDRET("Not Greater Than or Equal",!Z && (NotANumber || N));
    case 0x14:
                        SET_BSUN_ON_NAN();
                        CONDRET("Less Than",N && !(NotANumber || Z));
    case 0x1b:
                        SET_BSUN_ON_NAN();
                        CONDRET("Not Less Than",NotANumber || Z || !N);
    case 0x15:
                        SET_BSUN_ON_NAN();
                        CONDRET("Less Than or Equal",Z || (N && !NotANumber));
    case 0x1a:
                        SET_BSUN_ON_NAN();
                        CONDRET("Not Less Than or Equal",NotANumber || !(N || Z));
    case 0x16:
                        SET_BSUN_ON_NAN();
                        CONDRET("Greater or Less Than",!(NotANumber || Z));
    case 0x19:
                        SET_BSUN_ON_NAN();
                        CONDRET("Not Greater or Less Than",NotANumber || Z);
    case 0x17:
                        CONDRET("Greater, Less or Equal",!NotANumber);
    case 0x18:
                        SET_BSUN_ON_NAN();
                        CONDRET("Not Greater, Less or Equal",NotANumber);

                // IEEE Aware Tests, no BSUN
    case 0x02:
                        CONDRET("Ordered Greater Than",!(NotANumber || Z || N));
    case 0x0d:
                        CONDRET("Unordered or Less or Equal",NotANumber || Z || N);
    case 0x03:
                        CONDRET("Ordered Greater Than or Equal",Z || !(NotANumber || N));
    case 0x0c:
                        CONDRET("Unordered or Less Than",NotANumber || (N && !Z));
    case 0x04:
                        CONDRET("Ordered Less Than",N && !(NotANumber || Z));
    case 0x0b:
                        CONDRET("Unordered or Greater or Equal",NotANumber || Z || !N);
    case 0x05:
                        CONDRET("Ordered Less Than or Equal",Z || (N && !NotANumber));
    case 0x0a:
                        CONDRET("Unordered or Greater Than",NotANumber || !(N || Z));
    case 0x06:
                        CONDRET("Ordered Greater or Less Than",!(NotANumber || Z));
    case 0x09:
                        CONDRET("Unordered or Equal",NotANumber || Z);
    case 0x07:
                        CONDRET("Ordered",!NotANumber);
    case 0x08:
                        CONDRET("Unordered",NotANumber);

                // Miscellaneous Tests, no BSUN
    case 0x00:
                        CONDRET("False",0);
    case 0x0f:
                        CONDRET("True",1);

                // Miscellaneous Tests, BSUN
    case 0x10:
                        SET_BSUN_ON_NAN();
                        CONDRET("Signaling False",0);
    case 0x1f:
                        SET_BSUN_ON_NAN();
                        CONDRET("Signaling True",1);
    case 0x11:
                        SET_BSUN_ON_NAN();
                        CONDRET("Signaling Equal",Z);
    case 0x1e:
                        SET_BSUN_ON_NAN();
                        CONDRET("Signaling Not Equal",!Z);
  }
        CONDRET("",-1);

#undef N
#undef Z
#undef I
#undef NotANumber

}

PUBLIC void REGPARAM2 FFPU fpuop_dbcc(uae_u32 opcode, uae_u32 extra)
{
  uaecptr pc = (uae_u32) m68k_getpc ();
  uae_s32 disp = (uae_s32) (uae_s16) next_iword();
  int cc;

  D(bug("fdbcc_opp %X, %X at %08lx\r\n", (uae_u32)opcode, (uae_u32)extra, m68k_getpc ()));

  cc = fpp_cond(opcode, extra & 0x3f);
  if (cc < 0) {
                m68k_setpc (pc - 4);
                op_illg (opcode);
  } else if (!cc) {
                int reg = opcode & 0x7;

                // TODO_BIGENDIAN
                uae_u16 newv = (uae_u16)(m68k_dreg (regs, reg) & 0xffff) - 1;
                *((uae_u16 *)&m68k_dreg(regs, reg)) = newv;

                if (newv != 0xffff)
            m68k_setpc (pc + disp);
  }
}

PUBLIC void REGPARAM2 FFPU fpuop_scc(uae_u32 opcode, uae_u32 extra)
{
  uae_u32 ad;
  int cc;

  D(bug("fscc_opp %X, %X at %08lx\r\n", (uae_u32)opcode, (uae_u32)extra, m68k_getpc ()));

  cc = fpp_cond(opcode, extra & 0x3f);
  if (cc < 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
  } else if ((opcode & 0x38) == 0) {
                // TODO_BIGENDIAN
                m68k_dreg (regs, opcode & 7) = (m68k_dreg (regs, opcode & 7) & ~0xff) |
            (cc ? 0xff : 0x00);
  } else {
                if (get_fp_ad(opcode, &ad)) {
            put_byte(ad, cc ? 0xff : 0x00);
          }
  }
}

PUBLIC void REGPARAM2 FFPU fpuop_trapcc(uae_u32 opcode, uaecptr oldpc)
{
  int cc;

  D(bug("ftrapcc_opp %X at %08lx\r\n", (uae_u32)opcode, m68k_getpc ()));

#if I3_ON_FTRAPCC
#error "FIXME: _asm int 3"
        _asm int 3
#endif

        // This must be broken.
  cc = fpp_cond(opcode, opcode & 0x3f);

  if (cc < 0) {
                m68k_setpc (oldpc);
                op_illg (opcode);
  } else if (cc)
                Exception(7, oldpc - 2);
}

// NOTE that we get here also when there is a FNOP (nontrapping false, displ 0)
PUBLIC void REGPARAM2 FFPU fpuop_bcc(uae_u32 opcode, uaecptr pc, uae_u32 extra)
{
  int cc;

  D(bug("fbcc_opp %X, %X at %08lx, jumpto=%X\r\n", (uae_u32)opcode, (uae_u32)extra, m68k_getpc (), extra ));

  cc = fpp_cond(opcode, opcode & 0x3f);
  if (cc < 0) {
                m68k_setpc (pc);
                op_illg (opcode);
  } else if (cc) {
                if ((opcode & 0x40) == 0)
            extra = (uae_s32) (uae_s16) extra;
                m68k_setpc (pc + extra);
  }
}

// FSAVE has no post-increment
// 0x1f180000 == IDLE state frame, coprocessor version number 1F
PUBLIC void REGPARAM2 FFPU fpuop_save(uae_u32 opcode)
{
  uae_u32 ad;
  int incr = (opcode & 0x38) == 0x20 ? -1 : 1;
  int i;

  D(bug("fsave_opp at %08lx\r\n", m68k_getpc ()));

  if (get_fp_ad(opcode, &ad)) {
                if (FPU is_integral) {
                        // Put 4 byte 68040 IDLE frame.
                        if (incr < 0) {
                                ad -= 4;
                                put_long (ad, 0x41000000);
                        } else {
                                put_long (ad, 0x41000000);
                                ad += 4;
                        }
                } else {
                        // Put 28 byte 68881 IDLE frame.
                        if (incr < 0) {
                                D(bug("fsave_opp pre-decrement\r\n"));
                                ad -= 4;
                                // What's this? Some BIU flags, or (incorrectly placed) command/condition?
                                put_long (ad, 0x70000000);
                                for (i = 0; i < 5; i++) {
                                        ad -= 4;
                                        put_long (ad, 0x00000000);
                                }
                                ad -= 4;
                                put_long (ad, 0x1f180000); // IDLE, vers 1f
                        } else {
                                put_long (ad, 0x1f180000); // IDLE, vers 1f
                                ad += 4;
                                for (i = 0; i < 5; i++) {
                                        put_long (ad, 0x00000000);
                                        ad += 4;
                                }
                                // What's this? Some BIU flags, or (incorrectly placed) command/condition?
                                put_long (ad, 0x70000000);
                                ad += 4;
                        }
                }
                if ((opcode & 0x38) == 0x18) {
                        m68k_areg (regs, opcode & 7) = ad; // Never executed on a 68881
                        D(bug("PROBLEM: fsave_opp post-increment\r\n"));
                }
                if ((opcode & 0x38) == 0x20) {
                        m68k_areg (regs, opcode & 7) = ad;
                        D(bug("fsave_opp pre-decrement %X -> A%d\r\n",ad,opcode & 7));
                }
  }
}

PRIVATE void FFPU do_null_frestore ()
{
        // A null-restore operation sets FP7-FP0 positive, nonsignaling NANs.
        for( int i=0; i<8; i++ ) {
                MAKE_NAN( FPU registers[i] );
        }

        FPU instruction_address = 0;
        set_fpcr(0);
        set_fpsr(0);

        x86_status_word = SW_INITIAL;
        x86_status_word_accrued = 0;
        FPU fpsr.quotient = 0;

        x86_control_word = CW_INITIAL;
/*  _asm        FLDCW   x86_control_word
        _asm    FNCLEX */
        __asm__ __volatile__("fldcw %0\n\tfnclex" : : "m" (x86_control_word));
}

// FSAVE has no pre-decrement
PUBLIC void REGPARAM2 FFPU fpuop_restore(uae_u32 opcode)
{
  uae_u32 ad;
  uae_u32 d;
  int incr = (opcode & 0x38) == 0x20 ? -1 : 1;

  D(bug("frestore_opp at %08lx\r\n", m68k_getpc ()));

  if (get_fp_ad(opcode, &ad)) {
                if (FPU is_integral) {
                        // 68040
                        if (incr < 0) {
                                D(bug("PROBLEM: frestore_opp incr < 0\r\n"));
                                // this may be wrong, but it's never called.
                                ad -= 4;
                                d = get_long (ad);
                                if ((d & 0xff000000) == 0) { // NULL
                                        D(bug("frestore_opp found NULL frame at %X\r\n",ad-4));
                                        do_null_frestore();
                                } else if ((d & 0x00ff0000) == 0) { // IDLE
                                        D(bug("frestore_opp found IDLE frame at %X\r\n",ad-4));
                                } else if ((d & 0x00ff0000) == 0x00300000) { // UNIMP
                                        D(bug("PROBLEM: frestore_opp found UNIMP frame at %X\r\n",ad-4));
                                        ad -= 44;
                                } else if ((d & 0x00ff0000) == 0x00600000) { // BUSY
                                        D(bug("PROBLEM: frestore_opp found BUSY frame at %X\r\n",ad-4));
                                        ad -= 92;
                                } else {
                                        D(bug("PROBLEM: frestore_opp did not find a frame at %X, d=%X\r\n",ad-4,d));
                                }
                        } else {
                                d = get_long (ad);
                                D(bug("frestore_opp frame at %X = %X\r\n",ad,d));
                                ad += 4;
                                if ((d & 0xff000000) == 0) { // NULL
                                        D(bug("frestore_opp found NULL frame at %X\r\n",ad-4));
                                        do_null_frestore();
                                } else if ((d & 0x00ff0000) == 0) { // IDLE
                                        D(bug("frestore_opp found IDLE frame at %X\r\n",ad-4));
                                } else if ((d & 0x00ff0000) == 0x00300000) { // UNIMP
                                        D(bug("PROBLEM: frestore_opp found UNIMP frame at %X\r\n",ad-4));
                                        ad += 44;
                                } else if ((d & 0x00ff0000) == 0x00600000) { // BUSY
                                        D(bug("PROBLEM: frestore_opp found BUSY frame at %X\r\n",ad-4));
                                        ad += 92;
                                } else {
                                        D(bug("PROBLEM: frestore_opp did not find a frame at %X, d=%X\r\n",ad-4,d));
                                }
                        }
                } else {
                        // 68881
                        if (incr < 0) {
                                D(bug("PROBLEM: frestore_opp incr < 0\r\n"));
                                // this may be wrong, but it's never called.
                                ad -= 4;
                                d = get_long (ad);
                                if ((d & 0xff000000) == 0) { // NULL
                                        do_null_frestore();
                                } else if ((d & 0x00ff0000) == 0x00180000) {
                                        ad -= 6 * 4;
                                } else if ((d & 0x00ff0000) == 0x00380000) {
                                        ad -= 14 * 4;
                                } else if ((d & 0x00ff0000) == 0x00b40000) {
                                        ad -= 45 * 4;
                                }
                        } else {
                                d = get_long (ad);
                                D(bug("frestore_opp frame at %X = %X\r\n",ad,d));
                                ad += 4;
                                if ((d & 0xff000000) == 0) { // NULL
                                        D(bug("frestore_opp found NULL frame at %X\r\n",ad-4));
                                        do_null_frestore();
                                } else if ((d & 0x00ff0000) == 0x00180000) { // IDLE
                                        D(bug("frestore_opp found IDLE frame at %X\r\n",ad-4));
                                        ad += 6 * 4;
                                } else if ((d & 0x00ff0000) == 0x00380000) {// UNIMP? shouldn't it be 3C?
                                        ad += 14 * 4;
                                        D(bug("PROBLEM: frestore_opp found UNIMP? frame at %X\r\n",ad-4));
                                } else if ((d & 0x00ff0000) == 0x00b40000) {// BUSY
                                        D(bug("PROBLEM: frestore_opp found BUSY frame at %X\r\n",ad-4));
                                        ad += 45 * 4;
                                } else {
                                        D(bug("PROBLEM: frestore_opp did not find a frame at %X, d=%X\r\n",ad-4,d));
                                }
                        }
                }

                if ((opcode & 0x38) == 0x18) {
                        m68k_areg (regs, opcode & 7) = ad;
                        D(bug("frestore_opp post-increment %X -> A%d\r\n",ad,opcode & 7));
                }
                if ((opcode & 0x38) == 0x20) {
                        m68k_areg (regs, opcode & 7) = ad; // Never executed on a 68881
                        D(bug("PROBLEM: frestore_opp pre-decrement\r\n"));
                }
  }
}


/* ---------------------------- Old-style interface ---------------------------- */

// #ifndef OPTIMIZED_8BIT_MEMORY_ACCESS
PUBLIC void REGPARAM2 FFPU fpuop_arithmetic(uae_u32 opcode, uae_u32 extra)
{
        uae_u32 mask = (extra & 0xFC7F) | ((opcode & 0x0038) << 4);
        (*fpufunctbl[mask])(opcode,extra);
}
// #endif


/* ---------------------------- Illegal ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_illg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("ILLEGAL F OP 2 %X\r\n",opcode));

#if I3_ON_ILLEGAL_FPU_OP
#error "FIXME: asm int 3"
        _asm int 3
#endif

        m68k_setpc (m68k_getpc () - 4);
        op_illg (opcode);
        dump_registers( "END  ");
}


/* ---------------------------- FPP -> <ea> ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmove_2_ea( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVE -> <ea>\r\n"));

        if (put_fp_value (FPU registers[(extra >> 7) & 7], opcode, extra) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
        }

        /*
        Needed (among other things) by some Pack5/Elems68k transcendental
        functions, they require the ACCR_INEX flag after a "MOVE.D, Dreg".
        However, now put_fp_value() is responsible of clearing the exceptions
        and merging statuses.
        */

        /*
        WORD sw_temp;
        _asm FNSTSW sw_temp
        if(sw_temp & SW_PE) {
                _asm FNCLEX
                x86_status_word |= SW_PE;
                x86_status_word_accrued |= SW_PE;
        }
        */

        dump_registers( "END  ");
}


/* ---------------------------- CONTROL REGS -> Dreg ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_none_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM control(none) -> D%d\r\n", opcode & 7));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpiar_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM FPU instruction_address (%X) -> D%d\r\n", FPU instruction_address, opcode & 7));
        m68k_dreg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpsr (%X) -> D%d\r\n", get_fpsr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpsr();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> D%d\r\n", get_fpcr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpcr();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_fpiar_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpsr (%X) -> D%d\r\n", get_fpsr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpsr();
        D(bug("FMOVEM FPU instruction_address (%X) -> D%d\r\n", FPU instruction_address, opcode & 7));
        m68k_dreg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpiar_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> D%d\r\n", get_fpcr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpcr();
        D(bug("FMOVEM FPU instruction_address (%X) -> D%d\r\n", FPU instruction_address, opcode & 7));
        m68k_dreg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> D%d\r\n", get_fpcr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpcr();
        D(bug("FMOVEM regs.FPU fpsr (%X) -> D%d\r\n", get_fpsr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpsr();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Dreg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> D%d\r\n", get_fpcr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpcr();
        D(bug("FMOVEM regs.FPU fpsr (%X) -> D%d\r\n", get_fpsr(), opcode & 7));
        m68k_dreg (regs, opcode & 7) = get_fpsr();
        D(bug("FMOVEM FPU instruction_address (%X) -> D%d\r\n", FPU instruction_address, opcode & 7));
        m68k_dreg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}


/* ---------------------------- Dreg -> CONTROL REGS ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_none( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM D%d -> control(none)\r\n", opcode & 7));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_fpiar( uae_u32 opcode, uae_u32 extra )
{
        FPU instruction_address = m68k_dreg (regs, opcode & 7);
        D(bug("FMOVEM D%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_fpsr( uae_u32 opcode, uae_u32 extra )
{
        set_fpsr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_fpsr_fpiar( uae_u32 opcode, uae_u32 extra )
{
        set_fpsr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        FPU instruction_address = m68k_dreg (regs, opcode & 7);
        D(bug("FMOVEM D%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_fpcr( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_fpcr_fpiar( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        FPU instruction_address = m68k_dreg (regs, opcode & 7);
        D(bug("FMOVEM D%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_fpcr_fpsr( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        set_fpsr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Dreg_2_fpcr_fpsr_fpiar( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        set_fpsr( m68k_dreg (regs, opcode & 7) );
        D(bug("FMOVEM D%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        FPU instruction_address = m68k_dreg (regs, opcode & 7);
        D(bug("FMOVEM D%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}


/* ---------------------------- CONTROL REGS -> Areg ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_none_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM control(none) -> A%d\r\n", opcode & 7));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpiar_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM FPU instruction_address (%X) -> A%d\r\n", FPU instruction_address, opcode & 7));
        m68k_areg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpsr (%X) -> A%d\r\n", get_fpsr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpsr();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> A%d\r\n", get_fpcr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpcr();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_fpiar_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpsr (%X) -> A%d\r\n", get_fpsr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpsr();
        D(bug("FMOVEM FPU instruction_address (%X) -> A%d\r\n", FPU instruction_address, opcode & 7));
        m68k_areg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpiar_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> A%d\r\n", get_fpcr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpcr();
        D(bug("FMOVEM FPU instruction_address (%X) -> A%d\r\n", FPU instruction_address, opcode & 7));
        m68k_areg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> A%d\r\n", get_fpcr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpcr();
        D(bug("FMOVEM regs.FPU fpsr (%X) -> A%d\r\n", get_fpsr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpsr();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Areg( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM regs.FPU fpcr (%X) -> A%d\r\n", get_fpcr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpcr();
        D(bug("FMOVEM regs.FPU fpsr (%X) -> A%d\r\n", get_fpsr(), opcode & 7));
        m68k_areg (regs, opcode & 7) = get_fpsr();
        D(bug("FMOVEM FPU instruction_address (%X) -> A%d\r\n", FPU instruction_address, opcode & 7));
        m68k_areg (regs, opcode & 7) = FPU instruction_address;
        dump_registers( "END  ");
}


/* ---------------------------- Areg -> CONTROL REGS ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_none( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM A%d -> control(none)\r\n", opcode & 7));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_fpiar( uae_u32 opcode, uae_u32 extra )
{
        FPU instruction_address = m68k_areg (regs, opcode & 7);
        D(bug("FMOVEM A%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_fpsr( uae_u32 opcode, uae_u32 extra )
{
        set_fpsr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_fpsr_fpiar( uae_u32 opcode, uae_u32 extra )
{
        set_fpsr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        FPU instruction_address = m68k_areg (regs, opcode & 7);
        D(bug("FMOVEM A%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_fpcr( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_fpcr_fpiar( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        FPU instruction_address = m68k_areg (regs, opcode & 7);
        D(bug("FMOVEM A%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_fpcr_fpsr( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        set_fpsr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Areg_2_fpcr_fpsr_fpiar( uae_u32 opcode, uae_u32 extra )
{
        set_fpcr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpcr\r\n", opcode & 7, get_fpcr()));
        set_fpsr( m68k_areg (regs, opcode & 7) );
        D(bug("FMOVEM A%d (%X) -> regs.FPU fpsr\r\n", opcode & 7, get_fpsr()));
        FPU instruction_address = m68k_areg (regs, opcode & 7);
        D(bug("FMOVEM A%d (%X) -> FPU instruction_address\r\n", opcode & 7, FPU instruction_address));
        dump_registers( "END  ");
}


/* ---------------------------- CONTROL REGS -> --MEMORY---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_none_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM Control regs (none) -> mem\r\n" ));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpiar_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 4;
                put_long (ad, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 4;
                put_long (ad, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_fpiar_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 8;
                put_long (ad, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad ));
                put_long (ad+4, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+4 ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 4;
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpiar_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 8;
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+4 ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 8;
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad+4 ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Mem_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 12;
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad+4 ));
                put_long (ad+8, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+8 ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}


/* ---------------------------- CONTROL REGS -> MEMORY++ ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_none_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM Control regs (none) -> mem\r\n" ));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpiar_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad ));
                m68k_areg (regs, opcode & 7) = ad+4;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad ));
                m68k_areg (regs, opcode & 7) = ad+4;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_fpiar_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad ));
                put_long (ad+4, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+4 ));
                m68k_areg (regs, opcode & 7) = ad+8;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                m68k_areg (regs, opcode & 7) = ad+4;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpiar_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+4 ));
                m68k_areg (regs, opcode & 7) = ad+8;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        dump_registers( "END  ");
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad+4 ));
                m68k_areg (regs, opcode & 7) = ad+8;
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Mem_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad+4 ));
                put_long (ad+8, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+8 ));
                m68k_areg (regs, opcode & 7) = ad+12;
                dump_registers( "END  ");
        }
}


/* ---------------------------- CONTROL REGS -> MEMORY ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_none_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM Control regs (none) -> mem\r\n" ));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad ));
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad ));
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpsr_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad ));
                put_long (ad+4, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+4 ));
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+4 ));
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad+4 ));
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                put_long (ad, get_fpcr());
                D(bug("FMOVEM regs.FPU fpcr (%X) -> mem %X\r\n", get_fpcr(), ad ));
                put_long (ad+4, get_fpsr());
                D(bug("FMOVEM regs.FPU fpsr (%X) -> mem %X\r\n", get_fpsr(), ad+4 ));
                put_long (ad+8, FPU instruction_address);
                D(bug("FMOVEM FPU instruction_address (%X) -> mem %X\r\n", FPU instruction_address, ad+8 ));
                dump_registers( "END  ");
        }
}


/* ---------------------------- --MEMORY -> CONTROL REGS ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_none_predecrement( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM --Mem -> control(none)\r\n"));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpiar_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 4;
                FPU instruction_address = get_long (ad);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpsr_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 4;
                set_fpsr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad, get_fpsr() ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpsr_fpiar_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 8;
                set_fpsr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad, get_fpsr() ));
                FPU instruction_address = get_long (ad+4);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+4, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 4;
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpiar_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 8;
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                FPU instruction_address = get_long (ad+4);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+4, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 8;
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                set_fpsr( get_long (ad+4) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad+4, get_fpsr() ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_fpiar_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                ad -= 12;
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                set_fpsr( get_long (ad+4) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad+4, get_fpsr() ));
                FPU instruction_address = get_long (ad+8);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+8, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}


/* ---------------------------- CONTROL REGS -> MEMORY++ ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_none_postincrement( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM Mem++ -> control(none)\r\n"));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpiar_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                FPU instruction_address = get_long (ad);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad+4;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpsr_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                set_fpsr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad, get_fpsr() ));
                m68k_areg (regs, opcode & 7) = ad+4;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpsr_fpiar_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                set_fpsr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad, get_fpsr() ));
                FPU instruction_address = get_long (ad+4);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+4, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad+8;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                m68k_areg (regs, opcode & 7) = ad+4;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpiar_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                FPU instruction_address = get_long (ad+4);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+4, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad+8;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                set_fpsr( get_long (ad+4) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad+4, get_fpsr() ));
                m68k_areg (regs, opcode & 7) = ad+8;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_fpiar_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad;
        if (get_fp_ad(opcode, &ad)) {
                set_fpcr( get_long (ad) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                set_fpsr( get_long (ad+4) );
                D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad+4, get_fpsr() ));
                FPU instruction_address = get_long (ad+8);
                D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+8, FPU instruction_address ));
                m68k_areg (regs, opcode & 7) = ad+12;
                dump_registers( "END  ");
        }
}


/* ----------------------------   MEMORY -> CONTROL REGS  ---------------------------- */
/* ----------------------------            and            ---------------------------- */
/* ---------------------------- IMMEDIATE -> CONTROL REGS ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_none_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVEM Mem -> control(none)\r\n"));
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        if ((opcode & 0x3f) == 0x3c) {
                FPU instruction_address = next_ilong();
                D(bug("FMOVEM #<%X> -> FPU instruction_address\r\n", FPU instruction_address));
        } else {
                uae_u32 ad;
                if (get_fp_ad(opcode, &ad)) {
                        FPU instruction_address = get_long (ad);
                        D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad, FPU instruction_address ));
                }
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpsr_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        if ((opcode & 0x3f) == 0x3c) {
                set_fpsr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpsr\r\n", get_fpsr()));
        } else {
                uae_u32 ad;
                if (get_fp_ad(opcode, &ad)) {
                        set_fpsr( get_long (ad) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad, get_fpsr() ));
                }
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpsr_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        if ((opcode & 0x3f) == 0x3c) {
                set_fpsr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpsr\r\n", get_fpsr()));
                FPU instruction_address = next_ilong();
                D(bug("FMOVEM #<%X> -> FPU instruction_address\r\n", FPU instruction_address));
        } else {
                uae_u32 ad;
                if (get_fp_ad(opcode, &ad)) {
                        set_fpsr( get_long (ad) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad, get_fpsr() ));
                        FPU instruction_address = get_long (ad+4);
                        D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+4, FPU instruction_address ));
                }
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        if ((opcode & 0x3f) == 0x3c) {
                set_fpcr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpcr\r\n", get_fpcr()));
        } else {
                uae_u32 ad;
                if (get_fp_ad(opcode, &ad)) {
                        set_fpcr( get_long (ad) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                }
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        if ((opcode & 0x3f) == 0x3c) {
                set_fpcr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpcr\r\n", get_fpcr()));
                FPU instruction_address = next_ilong();
                D(bug("FMOVEM #<%X> -> FPU instruction_address\r\n", FPU instruction_address));
        } else {
                uae_u32 ad;
                if (get_fp_ad(opcode, &ad)) {
                        set_fpcr( get_long (ad) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                        FPU instruction_address = get_long (ad+4);
                        D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+4, FPU instruction_address ));
                }
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        if ((opcode & 0x3f) == 0x3c) {
                set_fpcr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpcr\r\n", get_fpcr()));
                set_fpsr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpsr\r\n", get_fpsr()));
        } else {
                uae_u32 ad;
                if (get_fp_ad(opcode, &ad)) {
                        set_fpcr( get_long (ad) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                        set_fpsr( get_long (ad+4) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad+4, get_fpsr() ));
                }
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_fpiar_2_Mem( uae_u32 opcode, uae_u32 extra )
{
        if ((opcode & 0x3f) == 0x3c) {
                set_fpcr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpcr\r\n", get_fpcr()));
                set_fpsr( next_ilong() );
                D(bug("FMOVEM #<%X> -> regs.FPU fpsr\r\n", get_fpsr()));
                FPU instruction_address = next_ilong();
                D(bug("FMOVEM #<%X> -> FPU instruction_address\r\n", FPU instruction_address));
        } else {
                uae_u32 ad;
                if (get_fp_ad(opcode, &ad)) {
                        set_fpcr( get_long (ad) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpcr\r\n", ad, get_fpcr() ));
                        set_fpsr( get_long (ad+4) );
                        D(bug("FMOVEM mem %X (%X) -> regs.FPU fpsr\r\n", ad+4, get_fpsr() ));
                        FPU instruction_address = get_long (ad+8);
                        D(bug("FMOVEM mem %X (%X) -> FPU instruction_address\r\n", ad+8, FPU instruction_address ));
                }
        }
        dump_registers( "END  ");
}


/* ---------------------------- FMOVEM MEMORY -> FPP ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_static_pred_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                ad -= 4;
                                wrd3 = get_long (ad);
                                ad -= 4;
                                wrd2 = get_long (ad);
                                ad -= 4;
                                wrd1 = get_long (ad);
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_static_pred_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                ad -= 4;
                                wrd3 = get_long (ad);
                                ad -= 4;
                                wrd2 = get_long (ad);
                                ad -= 4;
                                wrd1 = get_long (ad);
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_static_pred( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                ad -= 4;
                                wrd3 = get_long (ad);
                                ad -= 4;
                                wrd2 = get_long (ad);
                                ad -= 4;
                                wrd1 = get_long (ad);
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_dynamic_pred_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                ad -= 4;
                                wrd3 = get_long (ad);
                                ad -= 4;
                                wrd2 = get_long (ad);
                                ad -= 4;
                                wrd1 = get_long (ad);
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_dynamic_pred_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                ad -= 4;
                                wrd3 = get_long (ad);
                                ad -= 4;
                                wrd2 = get_long (ad);
                                ad -= 4;
                                wrd1 = get_long (ad);
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_dynamic_pred( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                ad -= 4;
                                wrd3 = get_long (ad);
                                ad -= 4;
                                wrd2 = get_long (ad);
                                ad -= 4;
                                wrd1 = get_long (ad);
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_static_postinc_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                wrd1 = get_long (ad);
                                ad += 4;
                                wrd2 = get_long (ad);
                                ad += 4;
                                wrd3 = get_long (ad);
                                ad += 4;
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_static_postinc_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                wrd1 = get_long (ad);
                                ad += 4;
                                wrd2 = get_long (ad);
                                ad += 4;
                                wrd3 = get_long (ad);
                                ad += 4;
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_static_postinc( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                wrd1 = get_long (ad);
                                ad += 4;
                                wrd2 = get_long (ad);
                                ad += 4;
                                wrd3 = get_long (ad);
                                ad += 4;
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_dynamic_postinc_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                wrd1 = get_long (ad);
                                ad += 4;
                                wrd2 = get_long (ad);
                                ad += 4;
                                wrd3 = get_long (ad);
                                ad += 4;
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_dynamic_postinc_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                wrd1 = get_long (ad);
                                ad += 4;
                                wrd2 = get_long (ad);
                                ad += 4;
                                wrd3 = get_long (ad);
                                ad += 4;
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_Mem_2_fpp_dynamic_postinc( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM memory->FPP\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                wrd1 = get_long (ad);
                                ad += 4;
                                wrd2 = get_long (ad);
                                ad += 4;
                                wrd3 = get_long (ad);
                                ad += 4;
                                to_exten_no_normalize (wrd1, wrd2, wrd3,FPU registers[reg]);
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}


/* ---------------------------- FPP -> FMOVEM MEMORY ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_static_pred_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                ad -= 4;
                                put_long (ad, wrd3);
                                ad -= 4;
                                put_long (ad, wrd2);
                                ad -= 4;
                                put_long (ad, wrd1);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_static_pred_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                ad -= 4;
                                put_long (ad, wrd3);
                                ad -= 4;
                                put_long (ad, wrd2);
                                ad -= 4;
                                put_long (ad, wrd1);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_static_pred( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                ad -= 4;
                                put_long (ad, wrd3);
                                ad -= 4;
                                put_long (ad, wrd2);
                                ad -= 4;
                                put_long (ad, wrd1);
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_dynamic_pred_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                ad -= 4;
                                put_long (ad, wrd3);
                                ad -= 4;
                                put_long (ad, wrd2);
                                ad -= 4;
                                put_long (ad, wrd1);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_dynamic_pred_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                ad -= 4;
                                put_long (ad, wrd3);
                                ad -= 4;
                                put_long (ad, wrd2);
                                ad -= 4;
                                put_long (ad, wrd1);
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_dynamic_pred( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=7; reg>=0; reg-- ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                ad -= 4;
                                put_long (ad, wrd3);
                                ad -= 4;
                                put_long (ad, wrd2);
                                ad -= 4;
                                put_long (ad, wrd1);
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_static_postinc_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                put_long (ad, wrd1);
                                ad += 4;
                                put_long (ad, wrd2);
                                ad += 4;
                                put_long (ad, wrd3);
                                ad += 4;
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_static_postinc_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                put_long (ad, wrd1);
                                ad += 4;
                                put_long (ad, wrd2);
                                ad += 4;
                                put_long (ad, wrd3);
                                ad += 4;
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_static_postinc( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = extra & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                put_long (ad, wrd1);
                                ad += 4;
                                put_long (ad, wrd2);
                                ad += 4;
                                put_long (ad, wrd3);
                                ad += 4;
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_dynamic_postinc_postincrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                put_long (ad, wrd1);
                                ad += 4;
                                put_long (ad, wrd2);
                                ad += 4;
                                put_long (ad, wrd3);
                                ad += 4;
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_dynamic_postinc_predecrement( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                put_long (ad, wrd1);
                                ad += 4;
                                put_long (ad, wrd2);
                                ad += 4;
                                put_long (ad, wrd3);
                                ad += 4;
                        }
                        list <<= 1;
                }
                m68k_areg (regs, opcode & 7) = ad;
                dump_registers( "END  ");
        }
}
PRIVATE void REGPARAM2 FFPU fpuop_fmovem_fpp_2_Mem_dynamic_postinc( uae_u32 opcode, uae_u32 extra )
{
        uae_u32 ad, list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff;
        D(bug("FMOVEM FPP->memory\r\n"));
        if (get_fp_ad(opcode, &ad)) {
                for( int reg=0; reg<8; reg++ ) {
                        uae_u32 wrd1, wrd2, wrd3;
                        if( list & 0x80 ) {
                                from_exten(FPU registers[reg],&wrd1, &wrd2, &wrd3);
                                put_long (ad, wrd1);
                                ad += 4;
                                put_long (ad, wrd2);
                                ad += 4;
                                put_long (ad, wrd3);
                                ad += 4;
                        }
                        list <<= 1;
                }
                dump_registers( "END  ");
        }
}


/* ---------------------------- FMOVEM CONSTANT ROM -> FPP ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_do_fldpi( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: Pi\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_pi, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fldlg2( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: Log 10 (2)\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_lg2, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_e( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: e\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_e, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fldl2e( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: Log 2 (e)\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_l2e, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_log_10_e( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: Log 10 (e)\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_log_10_e, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fldz( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: zero\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_z, sizeof(fpu_register) );
        x86_status_word = SW_Z;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fldln2( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: ln(2)\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_ln2, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_ln_10( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: ln(10)\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_ln_10, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fld1( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e0\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1, sizeof(fpu_register) );
        x86_status_word = SW_FINITE;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e1( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e1\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e1, sizeof(fpu_register) );
        x86_status_word = SW_FINITE;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e2( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e2\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e2, sizeof(fpu_register) );
        x86_status_word = SW_FINITE;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e4( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e4\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e4, sizeof(fpu_register) );
        x86_status_word = SW_FINITE;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e8( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e8\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e8, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2; // Is it really FPSR_EXCEPTION_INEX2?
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e16( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e16\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e16, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e32( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e32\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e32, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e64( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e64\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e64, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e128( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e128\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e128, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e256( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e256\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e256, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e512( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e512\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e512, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e1024( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e1024\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e1024, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e2048( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e2048\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e2048, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_load_const_1e4096( uae_u32 opcode, uae_u32 extra )
{
        D(bug("FMOVECR memory->FPP FP const: 1.0e4096\r\n"));
        memcpy( &FPU registers[(extra>>7) & 7], &const_1e4096, sizeof(fpu_register) );
        x86_status_word = SW_FINITE | FPSR_EXCEPTION_INEX2;
        dump_registers( "END  ");
}


/* ---------------------------- ALU ---------------------------- */

PRIVATE void REGPARAM2 FFPU fpuop_do_fmove( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FMOVE %s\r\n",etos(src)));
        do_fmove( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fint( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FINT %s, opcode=%X, extra=%X, ta %X\r\n",etos(src),opcode,extra,m68k_getpc()));
        do_fint( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fsinh( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSINH %s\r\n",etos(src)));
        do_fsinh( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fintrz( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FINTRZ %s\r\n",etos(src)));
        do_fintrz( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fsqrt( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSQRT %s\r\n",etos(src)));
        do_fsqrt( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_flognp1( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FLOGNP1 %s\r\n",etos(src)));
        do_flognp1( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fetoxm1( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FETOXM1 %s\r\n",etos(src)));
        do_fetoxm1( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_ftanh( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FTANH %s\r\n",etos(src)));
        do_ftanh( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fatan( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FATAN %s\r\n",etos(src)));
        do_fatan( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fasin( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FASIN %s\r\n",etos(src)));
        do_fasin( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fatanh( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FATANH %s\r\n",etos(src)));
        do_fatanh( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fsin( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSIN %s\r\n",etos(src)));
        do_fsin( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_ftan( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FTAN %s\r\n",etos(src)));
        do_ftan( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fetox( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FETOX %s\r\n",etos(src)));
        do_fetox( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_ftwotox( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FTWOTOX %s\r\n",etos(src)));
        do_ftwotox( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_ftentox( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FTENTOX %s\r\n",etos(src)));
        do_ftentox( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_flogn( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FLOGN %s\r\n",etos(src)));
        do_flogn( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_flog10( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FLOG10 %s\r\n",etos(src)));
        do_flog10( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_flog2( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FLOG2 %s\r\n",etos(src)));
        do_flog2( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fabs( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FABS %s\r\n",etos(src)));
        do_fabs( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fcosh( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FCOSH %s\r\n",etos(src)));
        do_fcosh( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fneg( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FNEG %s\r\n",etos(src)));
        do_fneg( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_facos( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FACOS %s\r\n",etos(src)));
        do_facos( FPU registers[reg], src );
        build_ex_status();
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fcos( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FCOS %s\r\n",etos(src)));
        do_fcos( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fgetexp( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FGETEXP %s\r\n",etos(src)));

        if( IS_INFINITY(src) ) {
                MAKE_NAN( FPU registers[reg] );
                do_ftst( FPU registers[reg] );
                x86_status_word |= SW_IE;
        } else {
                do_fgetexp( FPU registers[reg], src );
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fgetman( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FGETMAN %s\r\n",etos(src)));
        if( IS_INFINITY(src) ) {
                MAKE_NAN( FPU registers[reg] );
                do_ftst( FPU registers[reg] );
                x86_status_word |= SW_IE;
        } else {
                do_fgetman( FPU registers[reg], src );
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fdiv( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FDIV %s\r\n",etos(src)));
        do_fdiv( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fmod( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FMOD %s\r\n",etos(src)));

#if USE_3_BIT_QUOTIENT
        do_fmod( FPU registers[reg], src );
#else
        if( (x86_control_word & X86_ROUNDING_MODE) == CW_RC_ZERO ) {
                do_fmod_dont_set_cw( FPU registers[reg], src );
        } else {
                do_fmod( FPU registers[reg], src );
        }
#endif
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_frem( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FREM %s\r\n",etos(src)));
#if USE_3_BIT_QUOTIENT
        do_frem( FPU registers[reg], src );
#else
        if( (x86_control_word & X86_ROUNDING_MODE) == CW_RC_NEAR ) {
                do_frem_dont_set_cw( FPU registers[reg], src );
        } else {
                do_frem( FPU registers[reg], src );
        }
#endif
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fadd( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FADD %s\r\n",etos(src)));
        do_fadd( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fmul( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FMUL %s\r\n",etos(src)));
        do_fmul( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fsgldiv( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSGLDIV %s\r\n",etos(src)));
        do_fsgldiv( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fscale( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSCALE %s, opcode=%X, extra=%X, ta %X\r\n",etos(src),opcode,extra,m68k_getpc()));
        if( IS_INFINITY(FPU registers[reg]) ) {
                MAKE_NAN( FPU registers[reg] );
                do_ftst( FPU registers[reg] );
                x86_status_word |= SW_IE;
        } else {
                // When the absolute value of the source operand is >= 2^14,
                // an overflow or underflow always results.
                do_fscale( FPU registers[reg], src );
        }
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fsglmul( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSGLMUL %s\r\n",etos(src)));
        do_fsglmul( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fsub( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSUB %s\r\n",etos(src)));
        do_fsub( FPU registers[reg], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fsincos( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FSINCOS %s\r\n",etos(src)));
        do_fsincos( FPU registers[reg], FPU registers[extra & 7], src );
        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_fcmp( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FCMP %s\r\n",etos(src)));

        if( IS_INFINITY(src) ) {
                if( IS_NEGATIVE(src) ) {
                        if( IS_INFINITY(FPU registers[reg]) && IS_NEGATIVE(FPU registers[reg]) ) {
                                x86_status_word = SW_Z | SW_N;
                                D(bug("-INF FCMP -INF -> NZ\r\n"));
                        } else {
                                x86_status_word = SW_FINITE;
                                D(bug("X FCMP -INF -> None\r\n"));
                        }
                } else {
                        if( IS_INFINITY(FPU registers[reg]) && !IS_NEGATIVE(FPU registers[reg]) ) {
                                x86_status_word = SW_Z;
                                D(bug("+INF FCMP +INF -> Z\r\n"));
                        } else {
                                x86_status_word = SW_N;
                                D(bug("X FCMP +INF -> N\r\n"));
                        }
                }
        } else if( IS_INFINITY(FPU registers[reg]) ) {
                if( IS_NEGATIVE(FPU registers[reg]) ) {
                        x86_status_word = SW_N;
                        D(bug("-INF FCMP X -> Negative\r\n"));
                } else {
                        x86_status_word = SW_FINITE;
                        D(bug("+INF FCMP X -> None\r\n"));
                }
        } else {
                do_fcmp( FPU registers[reg], src );
        }

        dump_registers( "END  ");
}

PRIVATE void REGPARAM2 FFPU fpuop_do_ftst( uae_u32 opcode, uae_u32 extra )
{
        int reg = (extra >> 7) & 7;
  fpu_register src;
        if (get_fp_value (opcode, extra, src) == 0) {
                m68k_setpc (m68k_getpc () - 4);
                op_illg (opcode);
                dump_registers( "END  ");
                return;
        }
        D(bug("FTST %s\r\n",etos(src)));
        do_ftst( src );
        build_ex_status();
        dump_registers( "END  ");
}


/* ---------------------------- SETUP TABLES ---------------------------- */

PRIVATE void FFPU build_fpp_opp_lookup_table ()
{
        for( uae_u32 opcode=0; opcode<=0x38; opcode+=8 ) {
                for( uae_u32 extra=0; extra<65536; extra++ ) {
                        uae_u32 mask = (extra & 0xFC7F) | ((opcode & 0x0038) << 4);
                        fpufunctbl[mask] = & FFPU fpuop_illg;

                        switch ((extra >> 13) & 0x7) {
                                case 3:
                                        fpufunctbl[mask] = & FFPU fpuop_fmove_2_ea;
                                        break;
                                case 4:
                                case 5:
                                        if ((opcode & 0x38) == 0) {
                                                if (extra & 0x2000) { // dr bit
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_none_2_Dreg;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpiar_2_Dreg;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_2_Dreg;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_fpiar_2_Dreg;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_2_Dreg;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpiar_2_Dreg;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_2_Dreg;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Dreg;
                                                                        break;
                                                        }
                                                } else {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_none;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_fpiar;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_fpsr;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_fpsr_fpiar;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_fpcr;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_fpcr_fpiar;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_fpcr_fpsr;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Dreg_2_fpcr_fpsr_fpiar;
                                                                        break;
                                                        }
                                                }
                                        } else if ((opcode & 0x38) == 8) {
                                                if (extra & 0x2000) { // dr bit
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_none_2_Areg;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpiar_2_Areg;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_2_Areg;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_fpiar_2_Areg;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_2_Areg;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpiar_2_Areg;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_2_Areg;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Areg;
                                                                        break;
                                                        }
                                                } else {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_none;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_fpiar;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_fpsr;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_fpsr_fpiar;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_fpcr;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_fpcr_fpiar;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_fpcr_fpsr;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Areg_2_fpcr_fpsr_fpiar;
                                                                        break;
                                                        }
                                                }
                                        } else if (extra & 0x2000) {
                                                if ((opcode & 0x38) == 0x20) {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_none_2_Mem_predecrement;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpiar_2_Mem_predecrement;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_2_Mem_predecrement;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_fpiar_2_Mem_predecrement;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_2_Mem_predecrement;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpiar_2_Mem_predecrement;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_2_Mem_predecrement;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Mem_predecrement;
                                                                        break;
                                                        }
                                                } else if ((opcode & 0x38) == 0x18) {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_none_2_Mem_postincrement;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpiar_2_Mem_postincrement;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_2_Mem_postincrement;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_fpiar_2_Mem_postincrement;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_2_Mem_postincrement;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpiar_2_Mem_postincrement;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_2_Mem_postincrement;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Mem_postincrement;
                                                                        break;
                                                        }
                                                } else {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_none_2_Mem;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpiar_2_Mem;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_2_Mem;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpsr_fpiar_2_Mem;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_2_Mem;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpiar_2_Mem;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_2_Mem;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_fpcr_fpsr_fpiar_2_Mem;
                                                                        break;
                                                        }
                                                }
                                        } else {
                                                if ((opcode & 0x38) == 0x20) {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_none_predecrement;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpiar_predecrement;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpsr_predecrement;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpsr_fpiar_predecrement;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_predecrement;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpiar_predecrement;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_predecrement;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_fpiar_predecrement;
                                                                        break;
                                                        }
                                                } else if ((opcode & 0x38) == 0x18) {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_none_postincrement;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpiar_postincrement;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpsr_postincrement;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpsr_fpiar_postincrement;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_postincrement;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpiar_postincrement;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_postincrement;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_fpiar_postincrement;
                                                                        break;
                                                        }
                                                } else {
                                                        switch( extra & 0x1C00 ) {
                                                                case 0x0000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_none_2_Mem;
                                                                        break;
                                                                case 0x0400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpiar_2_Mem;
                                                                        break;
                                                                case 0x0800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpsr_2_Mem;
                                                                        break;
                                                                case 0x0C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpsr_fpiar_2_Mem;
                                                                        break;
                                                                case 0x1000:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_2_Mem;
                                                                        break;
                                                                case 0x1400:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpiar_2_Mem;
                                                                        break;
                                                                case 0x1800:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_2_Mem;
                                                                        break;
                                                                case 0x1C00:
                                                                        fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpcr_fpsr_fpiar_2_Mem;
                                                                        break;
                                                        }
                                                }
                                        break;
                                case 6:
                                        switch ((extra >> 11) & 3) {
                                                case 0: /* static pred */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_static_pred_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_static_pred_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_static_pred;
                                                        break;
                                                case 1: /* dynamic pred */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_dynamic_pred_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_dynamic_pred_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_dynamic_pred;
                                                        break;
                                                case 2: /* static postinc */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_static_postinc_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_static_postinc_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_static_postinc;
                                                        break;
                                                case 3: /* dynamic postinc */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_dynamic_postinc_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_dynamic_postinc_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_Mem_2_fpp_dynamic_postinc;
                                                        break;
                                        }
                                        break;
                                case 7:
                                        switch ((extra >> 11) & 3) {
                                                case 0: /* static pred */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_static_pred_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_static_pred_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_static_pred;
                                                        break;
                                                case 1: /* dynamic pred */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_dynamic_pred_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_dynamic_pred_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_dynamic_pred;
                                                        break;
                                                case 2: /* static postinc */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_static_postinc_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_static_postinc_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_static_postinc;
                                                        break;
                                                case 3: /* dynamic postinc */
                                                        if ((opcode & 0x38) == 0x18) // post-increment?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_dynamic_postinc_postincrement;
                                                        else if ((opcode & 0x38) == 0x20) // pre-decrement?
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_dynamic_postinc_predecrement;
                                                        else
                                                                fpufunctbl[mask] = & FFPU fpuop_fmovem_fpp_2_Mem_dynamic_postinc;
                                                        break;
                                        }
                                        break;
                                case 0:
                                case 2:
                                        if ((extra & 0xfc00) == 0x5c00) {
                                                switch (extra & 0x7f) {
                                                        case 0x00:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_fldpi;
                                                                break;
                                                        case 0x0b:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_fldlg2;
                                                                break;
                                                        case 0x0c:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_e;
                                                                break;
                                                        case 0x0d:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_fldl2e;
                                                                break;
                                                        case 0x0e:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_log_10_e;
                                                                break;
                                                        case 0x0f:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_fldz;
                                                                break;
                                                        case 0x30:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_fldln2;
                                                                break;
                                                        case 0x31:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_ln_10;
                                                                break;
                                                        case 0x32:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_fld1;
                                                                break;
                                                        case 0x33:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e1;
                                                                break;
                                                        case 0x34:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e2;
                                                                break;
                                                        case 0x35:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e4;
                                                                break;
                                                        case 0x36:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e8;
                                                                break;
                                                        case 0x37:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e16;
                                                                break;
                                                        case 0x38:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e32;
                                                                break;
                                                        case 0x39:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e64;
                                                                break;
                                                        case 0x3a:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e128;
                                                                break;
                                                        case 0x3b:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e256;
                                                                break;
                                                        case 0x3c:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e512;
                                                                break;
                                                        case 0x3d:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e1024;
                                                                break;
                                                        case 0x3e:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e2048;
                                                                break;
                                                        case 0x3f:
                                                                fpufunctbl[mask] = & FFPU fpuop_do_load_const_1e4096;
                                                                break;
                                                }
                                                break;
                                        }
                                        
                                        switch (extra & 0x7f) {
                                                case 0x00:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fmove;
                                                        break;
                                                case 0x01:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fint;
                                                        break;
                                                case 0x02:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fsinh;
                                                        break;
                                                case 0x03:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fintrz;
                                                        break;
                                                case 0x04:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fsqrt;
                                                        break;
                                                case 0x06:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_flognp1;
                                                        break;
                                                case 0x08:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fetoxm1;
                                                        break;
                                                case 0x09:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_ftanh;
                                                        break;
                                                case 0x0a:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fatan;
                                                        break;
                                                case 0x0c:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fasin;
                                                        break;
                                                case 0x0d:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fatanh;
                                                        break;
                                                case 0x0e:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fsin;
                                                        break;
                                                case 0x0f:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_ftan;
                                                        break;
                                                case 0x10:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fetox;
                                                        break;
                                                case 0x11:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_ftwotox;
                                                        break;
                                                case 0x12:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_ftentox;
                                                        break;
                                                case 0x14:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_flogn;
                                                        break;
                                                case 0x15:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_flog10;
                                                        break;
                                                case 0x16:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_flog2;
                                                        break;
                                                case 0x18:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fabs;
                                                        break;
                                                case 0x19:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fcosh;
                                                        break;
                                                case 0x1a:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fneg;
                                                        break;
                                                case 0x1c:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_facos;
                                                        break;
                                                case 0x1d:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fcos;
                                                        break;
                                                case 0x1e:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fgetexp;
                                                        break;
                                                case 0x1f:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fgetman;
                                                        break;
                                                case 0x20:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fdiv;
                                                        break;
                                                case 0x21:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fmod;
                                                        break;
                                                case 0x22:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fadd;
                                                        break;
                                                case 0x23:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fmul;
                                                        break;
                                                case 0x24:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fsgldiv;
                                                        break;
                                                case 0x25:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_frem;
                                                        break;
                                                case 0x26:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fscale;
                                                        break;
                                                case 0x27:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fsglmul;
                                                        break;
                                                case 0x28:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fsub;
                                                        break;
                                                case 0x30:
                                                case 0x31:
                                                case 0x32:
                                                case 0x33:
                                                case 0x34:
                                                case 0x35:
                                                case 0x36:
                                                case 0x37:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fsincos;
                                                        break;
                                                case 0x38:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_fcmp;
                                                        break;
                                                case 0x3a:
                                                        fpufunctbl[mask] = & FFPU fpuop_do_ftst;
                                                        break;
                                        }
                                }
                        }
                }
        }
}

/* ---------------------------- CONSTANTS ---------------------------- */

PRIVATE void FFPU set_constant ( fpu_register & f, char *name, double value, uae_s32 mult )
{
        FPU_CONSISTENCY_CHECK_START();
        if(mult == 1) {
/*              _asm {
                        MOV                     ESI, [f]
                        FLD     QWORD PTR [value]
                        FSTP    TBYTE PTR [ESI]
                } */
                __asm__ __volatile__(
                        "fldl   %1\n"
                                "fstpt  %0\n"
                        :       "=m" (f)
                        :       "m" (value)
                        );
        } else {
/*              _asm {
                        MOV                     ESI, [f]
                        FILD    DWORD PTR [mult]
                        FLD     QWORD PTR [value]
                        FMUL
                        FSTP    TBYTE PTR [ESI]
                } */
                __asm__ __volatile__(
                        "fildl  %2\n"
                                "fldl   %1\n"
                                "fmul   \n"
                                "fstpt  %0\n"
                        :       "=m" (f)
                        :       "m" (value), "m" (mult)
                        );
        }
        D(bug("set_constant (%s,%.04f) = %s\r\n",name,(float)value,etos(f)));
        FPU_CONSISTENCY_CHECK_STOP( mult==1 ? "set_constant(mult==1)" : "set_constant(mult>1)" );
}

PRIVATE void FFPU do_fldpi ( fpu_register & dest )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                FLDPI
                FXAM
    FNSTSW  x86_status_word
                MOV                     EDI, [dest]
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldpi  \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                );
        FPU_CONSISTENCY_CHECK_STOP("do_fldpi");
}

PRIVATE void FFPU do_fldlg2 ( fpu_register & dest )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                FLDLG2
                FXAM
    FNSTSW  x86_status_word
                MOV                     EDI, [dest]
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldlg2 \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                );
        FPU_CONSISTENCY_CHECK_STOP("do_fldlg2");
}

PRIVATE void FFPU do_fldl2e ( fpu_register & dest )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                FLDL2E
                FXAM
    FNSTSW  x86_status_word
                MOV                     EDI, [dest]
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldl2e \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                );
        FPU_CONSISTENCY_CHECK_STOP("do_fldl2e");
}

PRIVATE void FFPU do_fldz ( fpu_register & dest )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                FLDZ
                FXAM
    FNSTSW  x86_status_word
                MOV                     EDI, [dest]
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldz   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                );
        FPU_CONSISTENCY_CHECK_STOP("do_fldz");
}

PRIVATE void FFPU do_fldln2 ( fpu_register & dest )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                FLDLN2
                FXAM
    FNSTSW  x86_status_word
                MOV                     EDI, [dest]
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fldln2 \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                );
        FPU_CONSISTENCY_CHECK_STOP("do_fldln2");
}

PRIVATE void FFPU do_fld1 ( fpu_register & dest )
{
        FPU_CONSISTENCY_CHECK_START();
/*      _asm {
                FLD1
                FXAM
    FNSTSW  x86_status_word
                MOV                     EDI, [dest]
                FSTP    TBYTE PTR [EDI]
        } */
        __asm__ __volatile__(
                        "fld1   \n"
                        "fxam   \n"
                        "fnstsw %0\n"
                        "fstpt  %1\n"
                :       "=m" (x86_status_word), "=m" (dest)
                );
        FPU_CONSISTENCY_CHECK_STOP("do_fld1");
}


/* ---------------------------- MAIN INIT ---------------------------- */

#ifdef HAVE_SIGACTION
// Mega hackaround-that-happens-to-work: the following way to handle
// SIGFPE just happens to make the "fsave" below in fpu_init() *NOT*
// to abort with a floating point exception. However, we never
// actually reach sigfpe_handler().
static void sigfpe_handler(int code, siginfo_t *sip, void *)
{
        if (code == SIGFPE && sip->si_code == FPE_FLTINV) {
                fprintf(stderr, "Invalid floating point operation\n");
                abort();
        }
}
#endif

PUBLIC void FFPU fpu_init( bool integral_68040 )
{
        static bool done_first_time_initialization = false;
        if (!done_first_time_initialization) {
                fpu_init_native_fflags();
                fpu_init_native_exceptions();
                fpu_init_native_accrued_exceptions();
#ifdef HAVE_SIGACTION
                struct sigaction fpe_sa;
                sigemptyset(&fpe_sa.sa_mask);
                fpe_sa.sa_sigaction = sigfpe_handler;
                fpe_sa.sa_flags = SA_SIGINFO;
                sigaction(SIGFPE, &fpe_sa, 0);
#endif
                done_first_time_initialization = true;
        }

        __asm__ __volatile__("fsave %0" : "=m" (m_fpu_state_original));
        
        FPU is_integral = integral_68040;
        FPU instruction_address = 0;
        set_fpcr(0);
        set_fpsr(0);

        x86_control_word = CW_INITIAL; 
        x86_status_word = SW_INITIAL;
        x86_status_word_accrued = 0;
        FPU fpsr.quotient = 0;

        for( int i=0; i<8; i++ ) {
                MAKE_NAN( FPU registers[i] );
        }
        
        build_fpp_opp_lookup_table();

        __asm__ __volatile__("fninit\nfldcw %0" : : "m" (x86_control_word));

        do_fldpi( const_pi );
        do_fldlg2( const_lg2 );
        do_fldl2e( const_l2e );
        do_fldz( const_z );
        do_fldln2( const_ln2 );
        do_fld1( const_1 );

        set_constant( const_e,                  "e",                    exp (1.0), 1 );
        set_constant( const_log_10_e,   "Log 10 (e)",   log (exp (1.0)) / log (10.0), 1 );
        set_constant( const_ln_10,              "ln(10)",               log (10.0), 1 );
        set_constant( const_1e1,                "1.0e1",                1.0e1, 1 );
        set_constant( const_1e2,                "1.0e2",                1.0e2, 1 );
        set_constant( const_1e4,                "1.0e4",                1.0e4, 1 );
        set_constant( const_1e8,                "1.0e8",                1.0e8, 1 );
        set_constant( const_1e16,               "1.0e16",               1.0e16, 1 );
        set_constant( const_1e32,               "1.0e32",               1.0e32, 1 );
        set_constant( const_1e64,               "1.0e64",               1.0e64, 1 ) ;
        set_constant( const_1e128,              "1.0e128",              1.0e128, 1 );
        set_constant( const_1e256,              "1.0e256",              1.0e256, 1 );
        set_constant( const_1e512,              "1.0e512",              1.0e256, 10 );
        set_constant( const_1e1024,             "1.0e1024",             1.0e256, 100 );
        set_constant( const_1e2048,             "1.0e2048",             1.0e256, 1000 );
        set_constant( const_1e4096,             "1.0e4096",             1.0e256, 10000 );
        
        // Just in case.
        __asm__ __volatile__("fninit\nfldcw %0" : : "m" (x86_control_word));
}

PUBLIC void FFPU fpu_exit( void )
{
        __asm__ __volatile__("frstor %0" : : "m" (m_fpu_state_original));
}

PUBLIC void FFPU fpu_reset( void )
{
        fpu_exit();
        fpu_init(FPU is_integral);
}
Revision:	1.5
Committed:	2004-01-12T15:29:31Z (20 years, 8 months ago) by cebix
Branch:	MAIN
CVS Tags:	nigel-build-16, nigel-build-15
Changes since 1.4:	+1 -1 lines
Log Message:	Happy New Year! :)