uae_cpu/compiler/gencomp.c

/*
 *  compiler/gencomp.c - MC680x0 compilation generator
 *
 *  Based on work Copyright 1995, 1996 Bernd Schmidt
 *  Changes for UAE-JIT Copyright 2000 Bernd Meyer
 *
 *  Adaptation for Basilisk II and improvements, copyright 2000-2005
 *    Gwenole Beauchesne
 *
 *  Basilisk II (C) 1997-2005 Christian Bauer
 *  
 *  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
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include "sysdeps.h"
#include "readcpu.h"

#define BOOL_TYPE               "int"
#define failure                 global_failure=1
#define FAILURE                 global_failure=1
#define isjump                  global_isjump=1
#define is_const_jump   global_iscjump=1;
#define isaddx                  global_isaddx=1
#define uses_cmov               global_cmov=1
#define mayfail                 global_mayfail=1
#define uses_fpu                global_fpu=1

int hack_opcode;

static int global_failure;
static int global_isjump;
static int global_iscjump;
static int global_isaddx;
static int global_cmov;
static int long_opcode;
static int global_mayfail;
static int global_fpu;

static char endstr[1000];
static char lines[100000];
static int comp_index=0;

static int cond_codes_x86[]={-1,-1,7,6,3,2,5,4,-1,-1,9,8,13,12,15,14};

static void comprintf(const char* format, ...)
{
    va_list args;

    va_start(args,format);
    comp_index+=vsprintf(lines+comp_index,format,args);
}

static void com_discard(void)
{
    comp_index=0;
}

static void com_flush(void)
{
    int i;
    for (i=0;i<comp_index;i++)
        putchar(lines[i]);
    com_discard();
}


static FILE *headerfile;
static FILE *stblfile;

static int using_prefetch;
static int using_exception_3;
static int cpu_level;
static int noflags;

/* For the current opcode, the next lower level that will have different code.
 * Initialized to -1 for each opcode. If it remains unchanged, indicates we
 * are done with that opcode.  */
static int next_cpu_level;

static int *opcode_map;
static int *opcode_next_clev;
static int *opcode_last_postfix;
static unsigned long *counts;

static void 
read_counts (void)
{
    FILE *file;
    unsigned long opcode, count, total;
    char name[20];
    int nr = 0;
    memset (counts, 0, 65536 * sizeof *counts);

    file = fopen ("frequent.68k", "r");
    if (file)
    {
        fscanf (file, "Total: %lu\n", &total);
        while (fscanf (file, "%lx: %lu %s\n", &opcode, &count, name) == 3)
        {
            opcode_next_clev[nr] = 4;
            opcode_last_postfix[nr] = -1;
            opcode_map[nr++] = opcode;
            counts[opcode] = count;
        }
        fclose (file);
    }
    if (nr == nr_cpuop_funcs)
        return;
    for (opcode = 0; opcode < 0x10000; opcode++)
    {
        if (table68k[opcode].handler == -1 && table68k[opcode].mnemo != i_ILLG
            && counts[opcode] == 0)
        {
            opcode_next_clev[nr] = 4;
            opcode_last_postfix[nr] = -1;
            opcode_map[nr++] = opcode;
            counts[opcode] = count;
        }
    }
    if (nr != nr_cpuop_funcs)
        abort ();
}

static int n_braces = 0;
static int insn_n_cycles;

static void 
start_brace (void)
{
    n_braces++;
    comprintf ("{");
}

static void 
close_brace (void)
{
    assert (n_braces > 0);
    n_braces--;
    comprintf ("}");
}

static void 
finish_braces (void)
{
    while (n_braces > 0)
        close_brace ();
}

static void 
pop_braces (int to)
{
    while (n_braces > to)
        close_brace ();
}

static int 
bit_size (int size)
{
    switch (size)
    {
     case sz_byte:
        return 8;
     case sz_word:
        return 16;
     case sz_long:
        return 32;
     default:
        abort ();
    }
    return 0;
}

static const char *
bit_mask (int size)
{
    switch (size)
    {
     case sz_byte:
        return "0xff";
     case sz_word:
        return "0xffff";
     case sz_long:
        return "0xffffffff";
     default:
        abort ();
    }
    return 0;
}

static __inline__ void gen_update_next_handler(void)
{
    return; /* Can anything clever be done here? */
}

static void gen_writebyte(char* address, char* source)
{
    comprintf("\twritebyte(%s,%s,scratchie);\n",address,source);
}

static void gen_writeword(char* address, char* source)
{
    comprintf("\twriteword(%s,%s,scratchie);\n",address,source);
}

static void gen_writelong(char* address, char* source)
{
    comprintf("\twritelong(%s,%s,scratchie);\n",address,source);
}

static void gen_readbyte(char* address, char* dest)
{
    comprintf("\treadbyte(%s,%s,scratchie);\n",address,dest);
}

static void gen_readword(char* address, char* dest)
{
    comprintf("\treadword(%s,%s,scratchie);\n",address,dest);
}

static void gen_readlong(char* address, char* dest)
{
    comprintf("\treadlong(%s,%s,scratchie);\n",address,dest);
}


static const char *
gen_nextilong (void)
{
    static char buffer[80];

    sprintf (buffer, "comp_get_ilong((m68k_pc_offset+=4)-4)");
    insn_n_cycles += 4;
  
    long_opcode=1;
    return buffer;
}

static const char *
gen_nextiword (void)
{
    static char buffer[80];

    sprintf (buffer, "comp_get_iword((m68k_pc_offset+=2)-2)");
    insn_n_cycles+=2;

    long_opcode=1;
    return buffer;
}

static const char *
gen_nextibyte (void)
{
    static char buffer[80];

    sprintf (buffer, "comp_get_ibyte((m68k_pc_offset+=2)-2)");
    insn_n_cycles += 2;

    long_opcode=1;
    return buffer;
}

static void
swap_opcode (void)
{
        comprintf("#ifdef HAVE_GET_WORD_UNSWAPPED\n");
        comprintf("\topcode = do_byteswap_16(opcode);\n");
        comprintf("#endif\n");
}

static void 
sync_m68k_pc (void)
{
    comprintf("\t if (m68k_pc_offset>100) sync_m68k_pc();\n"); 
}


/* getv == 1: fetch data; getv != 0: check for odd address. If movem != 0,
 * the calling routine handles Apdi and Aipi modes.
 * gb-- movem == 2 means the same thing but for a MOVE16 instruction */
static void 
genamode (amodes mode, char *reg, wordsizes size, char *name, int getv, int movem)
{
    start_brace ();
    switch (mode)
    {
     case Dreg: /* Do we need to check dodgy here? */
        if (movem)
            abort ();
        if (getv == 1 || getv==2) { 
            /* We generate the variable even for getv==2, so we can use
               it as a destination for MOVE */
            comprintf ("\tint %s=%s;\n",name,reg);
        }
        return;

     case Areg:
        if (movem)
            abort ();
        if (getv == 1 || getv==2) {
            /* see above */
            comprintf ("\tint %s=dodgy?scratchie++:%s+8;\n",name,reg);
            if (getv==1) {
                comprintf ("\tif (dodgy) \n");
                comprintf ("\t\tmov_l_rr(%s,%s+8);\n",name, reg);
            }
        }
        return;

     case Aind:
        comprintf ("\tint %sa=dodgy?scratchie++:%s+8;\n",name,reg);
        comprintf ("\tif (dodgy) \n");
        comprintf ("\t\tmov_l_rr(%sa,%s+8);\n",name, reg);
        break;
     case Aipi:
        comprintf ("\tint %sa=scratchie++;\n",name,reg);
        comprintf ("\tmov_l_rr(%sa,%s+8);\n",name, reg);
        break;
     case Apdi: 
        switch (size)   
        {
         case sz_byte:
            if (movem) {
                comprintf ("\tint %sa=dodgy?scratchie++:%s+8;\n",name,reg);
                comprintf ("\tif (dodgy) \n");
                comprintf("\tmov_l_rr(%sa,8+%s);\n",name,reg);
            }
            else {
                start_brace();
                comprintf ("\tint %sa=dodgy?scratchie++:%s+8;\n",name,reg);
                comprintf("\tlea_l_brr(%s+8,%s+8,(uae_s32)-areg_byteinc[%s]);\n",reg,reg,reg);
                comprintf ("\tif (dodgy) \n");
                comprintf("\tmov_l_rr(%sa,8+%s);\n",name,reg);
            }
            break;
         case sz_word:
            if (movem) {
                comprintf ("\tint %sa=dodgy?scratchie++:%s+8;\n",name,reg);
                comprintf ("\tif (dodgy) \n");
                comprintf("\tmov_l_rr(%sa,8+%s);\n",name,reg);
            }
            else {
                start_brace();
                comprintf ("\tint %sa=dodgy?scratchie++:%s+8;\n",name,reg);
                comprintf("\tlea_l_brr(%s+8,%s+8,-2);\n",reg,reg);
                comprintf ("\tif (dodgy) \n");
                comprintf("\tmov_l_rr(%sa,8+%s);\n",name,reg);
            }
            break;
         case sz_long:
            if (movem) {
                comprintf ("\tint %sa=dodgy?scratchie++:%s+8;\n",name,reg);
                comprintf ("\tif (dodgy) \n");
                comprintf("\tmov_l_rr(%sa,8+%s);\n",name,reg);
            }
            else {
                start_brace();
                comprintf ("\tint %sa=dodgy?scratchie++:%s+8;\n",name,reg);
                comprintf("\tlea_l_brr(%s+8,%s+8,-4);\n",reg,reg);
                comprintf ("\tif (dodgy) \n");
                comprintf("\tmov_l_rr(%sa,8+%s);\n",name,reg);
            }
            break;
         default:
            abort ();
        }
        break;
     case Ad16:
        comprintf("\tint %sa=scratchie++;\n",name);
        comprintf("\tmov_l_rr(%sa,8+%s);\n",name,reg);
        comprintf("\tlea_l_brr(%sa,%sa,(uae_s32)(uae_s16)%s);\n",name,name,gen_nextiword());
        break;
     case Ad8r:
        comprintf("\tint %sa=scratchie++;\n",name);
        comprintf("\tcalc_disp_ea_020(%s+8,%s,%sa,scratchie);\n",
                  reg,gen_nextiword(),name);
        break;

     case PC16:
        comprintf("\tint %sa=scratchie++;\n",name);
        comprintf("\tuae_u32 address=start_pc+((char *)comp_pc_p-(char *)start_pc_p)+m68k_pc_offset;\n");
        comprintf ("\tuae_s32 PC16off = (uae_s32)(uae_s16)%s;\n", gen_nextiword ());
        comprintf("\tmov_l_ri(%sa,address+PC16off);\n",name);
        break;

     case PC8r:
        comprintf("\tint pctmp=scratchie++;\n");
        comprintf("\tint %sa=scratchie++;\n",name);
        comprintf("\tuae_u32 address=start_pc+((char *)comp_pc_p-(char *)start_pc_p)+m68k_pc_offset;\n");
        start_brace();
        comprintf("\tmov_l_ri(pctmp,address);\n");

        comprintf("\tcalc_disp_ea_020(pctmp,%s,%sa,scratchie);\n",
                  gen_nextiword(),name);
        break;
     case absw:
        comprintf ("\tint %sa = scratchie++;\n",name);
        comprintf ("\tmov_l_ri(%sa,(uae_s32)(uae_s16)%s);\n", name, gen_nextiword ());
        break;
     case absl:
        comprintf ("\tint %sa = scratchie++;\n",name);
        comprintf ("\tmov_l_ri(%sa,%s); /* absl */\n", name, gen_nextilong ());
        break;
     case imm:
        if (getv != 1)
            abort ();
        switch (size)
        {
         case sz_byte:
            comprintf ("\tint %s = scratchie++;\n",name);
            comprintf ("\tmov_l_ri(%s,(uae_s32)(uae_s8)%s);\n", name, gen_nextibyte ());
            break;
         case sz_word:
            comprintf ("\tint %s = scratchie++;\n",name);
            comprintf ("\tmov_l_ri(%s,(uae_s32)(uae_s16)%s);\n", name, gen_nextiword ());
            break;
         case sz_long:
            comprintf ("\tint %s = scratchie++;\n",name);
            comprintf ("\tmov_l_ri(%s,%s);\n", name, gen_nextilong ());
            break;
         default:
            abort ();
        }
        return;
     case imm0:
        if (getv != 1)
            abort ();
        comprintf ("\tint %s = scratchie++;\n",name);
        comprintf ("\tmov_l_ri(%s,(uae_s32)(uae_s8)%s);\n", name, gen_nextibyte ());
        return;
     case imm1:
        if (getv != 1)
            abort ();
        comprintf ("\tint %s = scratchie++;\n",name);
        comprintf ("\tmov_l_ri(%s,(uae_s32)(uae_s16)%s);\n", name, gen_nextiword ());
        return;
     case imm2:
        if (getv != 1)
            abort ();
        comprintf ("\tint %s = scratchie++;\n",name);
        comprintf ("\tmov_l_ri(%s,%s);\n", name, gen_nextilong ());
        return;
     case immi:
        if (getv != 1)
            abort ();
        comprintf ("\tint %s = scratchie++;\n",name);
        comprintf ("\tmov_l_ri(%s,%s);\n", name, reg);
        return;
     default:
        abort ();
    }

    /* We get here for all non-reg non-immediate addressing modes to
     * actually fetch the value. */
    if (getv == 1)
    {
        char astring[80];
        sprintf(astring,"%sa",name);
        switch (size)
        {
         case sz_byte:
            insn_n_cycles += 2;
            break;
         case sz_word:
            insn_n_cycles += 2;
            break;
         case sz_long:
            insn_n_cycles += 4;
            break;
         default:
            abort ();
        }
        start_brace ();
        comprintf("\tint %s=scratchie++;\n",name);
        switch (size)
        {
         case sz_byte:
            gen_readbyte(astring,name);
            break;
         case sz_word:
            gen_readword(astring,name);
            break;
         case sz_long:
            gen_readlong(astring,name);
            break;
         default:
            abort ();
        }
    }

    /* We now might have to fix up the register for pre-dec or post-inc
     * addressing modes. */
    if (!movem) {
        char x[160];
        switch (mode)
        {
         case Aipi:
            switch (size)
            {
             case sz_byte:
                comprintf("\tlea_l_brr(%s+8,%s+8,areg_byteinc[%s]);\n",reg,reg,reg);
                break;
             case sz_word:
                comprintf("\tlea_l_brr(%s+8,%s+8,2);\n",reg,reg,reg);
                break;
             case sz_long:
                comprintf("\tlea_l_brr(%s+8,%s+8,4);\n",reg,reg);
                break;
             default:
                abort ();
            }
            break;
         case Apdi:
            break;
         default:
            break;
        }
    }
}

static void 
genastore (char *from, amodes mode, char *reg, wordsizes size, char *to)
{
    switch (mode)
    {
     case Dreg:
        switch (size)
        {
         case sz_byte:
            comprintf("\tif(%s!=%s)\n",reg,from);
            comprintf ("\t\tmov_b_rr(%s,%s);\n", reg, from);
            break;
         case sz_word:
            comprintf("\tif(%s!=%s)\n",reg,from);
            comprintf ("\t\tmov_w_rr(%s,%s);\n", reg, from);
            break;
         case sz_long:
            comprintf("\tif(%s!=%s)\n",reg,from);
            comprintf ("\t\tmov_l_rr(%s,%s);\n", reg, from);
            break;
         default:
            abort ();
        }
        break;
     case Areg:
        switch (size)
        {
         case sz_word:
            comprintf("\tif(%s+8!=%s)\n",reg,from);
            comprintf ("\t\tmov_w_rr(%s+8,%s);\n", reg, from);
            break;
         case sz_long:
            comprintf("\tif(%s+8!=%s)\n",reg,from);
            comprintf ("\t\tmov_l_rr(%s+8,%s);\n", reg, from);
            break;
         default:
            abort ();
        }
        break;

     case Apdi:
     case absw:
     case PC16:
     case PC8r:
     case Ad16:
     case Ad8r:
     case Aipi:
     case Aind:
     case absl:
     {
         char astring[80];
         sprintf(astring,"%sa",to);
        
         switch (size)
         {
          case sz_byte:
             insn_n_cycles += 2;
             gen_writebyte(astring,from);
             break;
          case sz_word:
             insn_n_cycles += 2;
             gen_writeword(astring,from);
             break;
          case sz_long:
             insn_n_cycles += 4;
             gen_writelong(astring,from);
             break;
          default:
             abort ();
         }
     }
     break;
     case imm:
     case imm0:
     case imm1:
     case imm2:
     case immi:
        abort ();
        break;
     default:
        abort ();
    }
}

static void genmov16(uae_u32 opcode, struct instr *curi)
{
        comprintf("\tint src=scratchie++;\n");
        comprintf("\tint dst=scratchie++;\n");
        
        if ((opcode & 0xfff8) == 0xf620) {
                /* MOVE16 (Ax)+,(Ay)+ */
                comprintf("\tuae_u16 dstreg=((%s)>>12)&0x07;\n", gen_nextiword());
                comprintf("\tmov_l_rr(src,8+srcreg);\n");
                comprintf("\tmov_l_rr(dst,8+dstreg);\n");
        }
        else {
                /* Other variants */
                genamode (curi->smode, "srcreg", curi->size, "src", 0, 2);
                genamode (curi->dmode, "dstreg", curi->size, "dst", 0, 2);
                comprintf("\tmov_l_rr(src,srca);\n");
                comprintf("\tmov_l_rr(dst,dsta);\n");
        }
        
        /* Align on 16-byte boundaries */
        comprintf("\tand_l_ri(src,~15);\n");
        comprintf("\tand_l_ri(dst,~15);\n");
        
        if ((opcode & 0xfff8) == 0xf620) {
                comprintf("\tif (srcreg != dstreg)\n");
                comprintf("\tadd_l_ri(srcreg+8,16);\n");
                comprintf("\tadd_l_ri(dstreg+8,16);\n");
        }
        else if ((opcode & 0xfff8) == 0xf600)
                comprintf("\tadd_l_ri(srcreg+8,16);\n");
        else if ((opcode & 0xfff8) == 0xf608)
                comprintf("\tadd_l_ri(dstreg+8,16);\n");

        comprintf("\tint tmp=scratchie;\n");
        comprintf("\tscratchie+=4;\n");
        
        comprintf("\tget_n_addr(src,src,scratchie);\n"
                "\tget_n_addr(dst,dst,scratchie);\n"
                "\tmov_l_rR(tmp+0,src,0);\n"
                "\tmov_l_rR(tmp+1,src,4);\n"
                "\tmov_l_rR(tmp+2,src,8);\n"
                "\tmov_l_rR(tmp+3,src,12);\n"
                "\tmov_l_Rr(dst,tmp+0,0);\n"
                "\tforget_about(tmp+0);\n"
                "\tmov_l_Rr(dst,tmp+1,4);\n"
                "\tforget_about(tmp+1);\n"
                "\tmov_l_Rr(dst,tmp+2,8);\n"
                "\tforget_about(tmp+2);\n"
                "\tmov_l_Rr(dst,tmp+3,12);\n");
}

static void 
genmovemel (uae_u16 opcode)
{
    comprintf ("\tuae_u16 mask = %s;\n", gen_nextiword ());
    comprintf ("\tint native=scratchie++;\n");
    comprintf ("\tint i;\n");
    comprintf ("\tsigned char offset=0;\n");
    genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 2, 1);
    comprintf("\tget_n_addr(srca,native,scratchie);\n");

    comprintf("\tfor (i=0;i<16;i++) {\n"
              "\t\tif ((mask>>i)&1) {\n");
    switch(table68k[opcode].size) {
     case sz_long: 
        comprintf("\t\t\tmov_l_rR(i,native,offset);\n"
                  "\t\t\tbswap_32(i);\n"
                  "\t\t\toffset+=4;\n");
        break;
     case sz_word: 
        comprintf("\t\t\tmov_w_rR(i,native,offset);\n"
                  "\t\t\tbswap_16(i);\n"
                  "\t\t\tsign_extend_16_rr(i,i);\n"
                  "\t\t\toffset+=2;\n");
        break;
     default: abort();
    }
    comprintf("\t\t}\n"
              "\t}");
    if (table68k[opcode].dmode == Aipi) {
        comprintf("\t\t\tlea_l_brr(8+dstreg,srca,offset);\n"); 
    }
}


static void 
genmovemle (uae_u16 opcode)
{
    comprintf ("\tuae_u16 mask = %s;\n", gen_nextiword ());
    comprintf ("\tint native=scratchie++;\n");
    comprintf ("\tint i;\n");
    comprintf ("\tint tmp=scratchie++;\n");
    comprintf ("\tsigned char offset=0;\n");
    genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 2, 1);

    comprintf("\tget_n_addr(srca,native,scratchie);\n");

    if (table68k[opcode].dmode!=Apdi) {
        comprintf("\tfor (i=0;i<16;i++) {\n"
                  "\t\tif ((mask>>i)&1) {\n");
        switch(table68k[opcode].size) {
         case sz_long: 
            comprintf("\t\t\tmov_l_rr(tmp,i);\n"
                      "\t\t\tbswap_32(tmp);\n"
                      "\t\t\tmov_l_Rr(native,tmp,offset);\n"
                      "\t\t\toffset+=4;\n");
            break;
         case sz_word: 
            comprintf("\t\t\tmov_l_rr(tmp,i);\n"
                      "\t\t\tbswap_16(tmp);\n"
                      "\t\t\tmov_w_Rr(native,tmp,offset);\n"
                      "\t\t\toffset+=2;\n");
            break;
         default: abort();
        }
    }
    else {  /* Pre-decrement */
        comprintf("\tfor (i=0;i<16;i++) {\n"
                  "\t\tif ((mask>>i)&1) {\n");
        switch(table68k[opcode].size) {
         case sz_long: 
            comprintf("\t\t\toffset-=4;\n"
                      "\t\t\tmov_l_rr(tmp,15-i);\n"
                      "\t\t\tbswap_32(tmp);\n"
                      "\t\t\tmov_l_Rr(native,tmp,offset);\n"
                      );
            break;
         case sz_word: 
            comprintf("\t\t\toffset-=2;\n"
                      "\t\t\tmov_l_rr(tmp,15-i);\n"
                      "\t\t\tbswap_16(tmp);\n"
                      "\t\t\tmov_w_Rr(native,tmp,offset);\n"
                      );
            break;
         default: abort();
        }
    }
  

    comprintf("\t\t}\n"
              "\t}");
    if (table68k[opcode].dmode == Apdi) {
        comprintf("\t\t\tlea_l_brr(8+dstreg,srca,(uae_s32)offset);\n");
    }
}


static void 
duplicate_carry (void)
{
    comprintf ("\tif (needed_flags&FLAG_X) duplicate_carry();\n");
}

typedef enum
{
    flag_logical_noclobber, flag_logical, flag_add, flag_sub, flag_cmp, 
    flag_addx, flag_subx, flag_zn, flag_av, flag_sv, flag_and, flag_or,
    flag_eor, flag_mov
}
flagtypes;


static void 
genflags (flagtypes type, wordsizes size, char *value, char *src, char *dst)
{
    if (noflags) {
        switch(type) {
         case flag_cmp:
            comprintf("\tdont_care_flags();\n");
            comprintf("/* Weird --- CMP with noflags ;-) */\n");
            return;
         case flag_add:
         case flag_sub:
            comprintf("\tdont_care_flags();\n");
            {
                char* op;
                switch(type) {
                 case flag_add: op="add"; break;
                 case flag_sub: op="sub"; break;
                 default: abort();
                }
                switch (size)
                {
                 case sz_byte:
                    comprintf("\t%s_b(%s,%s);\n",op,dst,src);
                    break;
                 case sz_word:
                    comprintf("\t%s_w(%s,%s);\n",op,dst,src);
                    break;
                 case sz_long:
                    comprintf("\t%s_l(%s,%s);\n",op,dst,src);
                    break;
                }
                return;
            }
            break;

         case flag_and:
            comprintf("\tdont_care_flags();\n");
            switch (size)
            {
             case sz_byte:
                comprintf("if (kill_rodent(dst)) {\n");
                comprintf("\tzero_extend_8_rr(scratchie,%s);\n",src);
                comprintf("\tor_l_ri(scratchie,0xffffff00);\n");
                comprintf("\tand_l(%s,scratchie);\n",dst);
                comprintf("\tforget_about(scratchie);\n");
                comprintf("\t} else \n"
                          "\tand_b(%s,%s);\n",dst,src);
                break;
             case sz_word:
                comprintf("if (kill_rodent(dst)) {\n");
                comprintf("\tzero_extend_16_rr(scratchie,%s);\n",src);
                comprintf("\tor_l_ri(scratchie,0xffff0000);\n");
                comprintf("\tand_l(%s,scratchie);\n",dst);
                comprintf("\tforget_about(scratchie);\n");
                comprintf("\t} else \n"
                          "\tand_w(%s,%s);\n",dst,src);
                break;
             case sz_long:
                comprintf("\tand_l(%s,%s);\n",dst,src);
                break;
            }
            return;

         case flag_mov:
            comprintf("\tdont_care_flags();\n");
            switch (size)
            {
             case sz_byte:
                comprintf("if (kill_rodent(dst)) {\n");
                comprintf("\tzero_extend_8_rr(scratchie,%s);\n",src);
                comprintf("\tand_l_ri(%s,0xffffff00);\n",dst);
                comprintf("\tor_l(%s,scratchie);\n",dst);
                comprintf("\tforget_about(scratchie);\n");
                comprintf("\t} else \n"
                          "\tmov_b_rr(%s,%s);\n",dst,src);
                break;
             case sz_word:
                comprintf("if (kill_rodent(dst)) {\n");
                comprintf("\tzero_extend_16_rr(scratchie,%s);\n",src);
                comprintf("\tand_l_ri(%s,0xffff0000);\n",dst);
                comprintf("\tor_l(%s,scratchie);\n",dst);
                comprintf("\tforget_about(scratchie);\n");
                comprintf("\t} else \n"
                          "\tmov_w_rr(%s,%s);\n",dst,src);
                break;
             case sz_long:
                comprintf("\tmov_l_rr(%s,%s);\n",dst,src);
                break;
            }
            return;

         case flag_or:
         case flag_eor:
            comprintf("\tdont_care_flags();\n");
            start_brace();
            {
                char* op;
                switch(type) {
                 case flag_or:  op="or"; break;
                 case flag_eor: op="xor"; break;
                 default: abort();
                }
                switch (size)
                {
                 case sz_byte:
                    comprintf("if (kill_rodent(dst)) {\n");
                    comprintf("\tzero_extend_8_rr(scratchie,%s);\n",src);
                    comprintf("\t%s_l(%s,scratchie);\n",op,dst);
                    comprintf("\tforget_about(scratchie);\n");
                    comprintf("\t} else \n"
                              "\t%s_b(%s,%s);\n",op,dst,src);
                    break;
                 case sz_word:
                    comprintf("if (kill_rodent(dst)) {\n");
                    comprintf("\tzero_extend_16_rr(scratchie,%s);\n",src);
                    comprintf("\t%s_l(%s,scratchie);\n",op,dst);
                    comprintf("\tforget_about(scratchie);\n");
                    comprintf("\t} else \n"
                              "\t%s_w(%s,%s);\n",op,dst,src);
                    break;
                 case sz_long:
                    comprintf("\t%s_l(%s,%s);\n",op,dst,src);
                    break;
                }
                close_brace();
                return;
            }
      

         case flag_addx:
         case flag_subx:
            comprintf("\tdont_care_flags();\n");
            {
                char* op;
                switch(type) {
                 case flag_addx: op="adc"; break;
                 case flag_subx: op="sbb"; break;
                 default: abort();
                }
                comprintf("\trestore_carry();\n"); /* Reload the X flag into C */
                switch (size)
                {
                 case sz_byte:
                    comprintf("\t%s_b(%s,%s);\n",op,dst,src);
                    break;
                 case sz_word:
                    comprintf("\t%s_w(%s,%s);\n",op,dst,src);
                    break;
                 case sz_long:
                    comprintf("\t%s_l(%s,%s);\n",op,dst,src);
                    break;
                }
                return;
            }
            break;
         default: return;
        }
    }
  
    /* Need the flags, but possibly not all of them */
    switch (type)
    {
     case flag_logical_noclobber:
        failure;

     case flag_and:
     case flag_or:
     case flag_eor:
        comprintf("\tdont_care_flags();\n");
        start_brace();
        {
            char* op;
            switch(type) {
             case flag_and: op="and"; break;
             case flag_or:  op="or"; break;
             case flag_eor: op="xor"; break;
             default: abort();
            }
            switch (size)
            {
             case sz_byte:
                comprintf("\tstart_needflags();\n"
                          "\t%s_b(%s,%s);\n",op,dst,src);
                break;
             case sz_word:
                comprintf("\tstart_needflags();\n"
                          "\t%s_w(%s,%s);\n",op,dst,src);
                break;
             case sz_long:
                comprintf("\tstart_needflags();\n"
                          "\t%s_l(%s,%s);\n",op,dst,src);
                break;
            }
            comprintf("\tlive_flags();\n");
            comprintf("\tend_needflags();\n");
            close_brace();
            return;
        }

     case flag_mov:
        comprintf("\tdont_care_flags();\n");
        start_brace();
        {
            switch (size)
            {
             case sz_byte:
                comprintf("\tif (%s!=%s) {\n",src,dst);
                comprintf("\tmov_b_ri(%s,0);\n"
                          "\tstart_needflags();\n",dst);
                comprintf("\tor_b(%s,%s);\n",dst,src);
                comprintf("\t} else {\n");
                comprintf("\tmov_b_rr(%s,%s);\n",dst,src);
                comprintf("\ttest_b_rr(%s,%s);\n",dst,dst);
                comprintf("\t}\n");
                break;
             case sz_word:
                comprintf("\tif (%s!=%s) {\n",src,dst);
                comprintf("\tmov_w_ri(%s,0);\n"
                          "\tstart_needflags();\n",dst);
                comprintf("\tor_w(%s,%s);\n",dst,src);
                comprintf("\t} else {\n");
                comprintf("\tmov_w_rr(%s,%s);\n",dst,src);
                comprintf("\ttest_w_rr(%s,%s);\n",dst,dst);
                comprintf("\t}\n");
                break;
             case sz_long:
                comprintf("\tif (%s!=%s) {\n",src,dst);
                comprintf("\tmov_l_ri(%s,0);\n"
                          "\tstart_needflags();\n",dst);
                comprintf("\tor_l(%s,%s);\n",dst,src);
                comprintf("\t} else {\n");
                comprintf("\tmov_l_rr(%s,%s);\n",dst,src);
                comprintf("\ttest_l_rr(%s,%s);\n",dst,dst);
                comprintf("\t}\n");
                break;
            }
            comprintf("\tlive_flags();\n");
            comprintf("\tend_needflags();\n");
            close_brace();
            return;
        }

     case flag_logical:
        comprintf("\tdont_care_flags();\n");
        start_brace();
        switch (size)
        {
         case sz_byte:
            comprintf("\tstart_needflags();\n"
                      "\ttest_b_rr(%s,%s);\n",value,value);
            break;
         case sz_word:
            comprintf("\tstart_needflags();\n"
                      "\ttest_w_rr(%s,%s);\n",value,value);
            break;
         case sz_long:
            comprintf("\tstart_needflags();\n"
                      "\ttest_l_rr(%s,%s);\n",value,value);
            break;
        }
        comprintf("\tlive_flags();\n");
        comprintf("\tend_needflags();\n");
        close_brace();
        return;


     case flag_add:
     case flag_sub:
     case flag_cmp:
        comprintf("\tdont_care_flags();\n");
        {
            char* op;
            switch(type) {
             case flag_add: op="add"; break;
             case flag_sub: op="sub"; break;
             case flag_cmp: op="cmp"; break;
             default: abort();
            }
            switch (size)
            {
             case sz_byte:
                comprintf("\tstart_needflags();\n"
                          "\t%s_b(%s,%s);\n",op,dst,src);
                break;
             case sz_word:
                comprintf("\tstart_needflags();\n"
                          "\t%s_w(%s,%s);\n",op,dst,src);
                break;
             case sz_long:
                comprintf("\tstart_needflags();\n"
                          "\t%s_l(%s,%s);\n",op,dst,src);
                break;
            }
            comprintf("\tlive_flags();\n");
            comprintf("\tend_needflags();\n");
            if (type!=flag_cmp) {
                duplicate_carry();
            }
            comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
            
            return;
        }
      
     case flag_addx:
     case flag_subx:
        uses_cmov;
        comprintf("\tdont_care_flags();\n");
        {
            char* op;
            switch(type) {
             case flag_addx: op="adc"; break;
             case flag_subx: op="sbb"; break;
             default: abort();
            }
            start_brace();
            comprintf("\tint zero=scratchie++;\n"
                      "\tint one=scratchie++;\n"
                      "\tif (needed_flags&FLAG_Z) {\n"
                      "\tmov_l_ri(zero,0);\n"
                      "\tmov_l_ri(one,-1);\n"
                      "\tmake_flags_live();\n"
                      "\tcmov_l_rr(zero,one,5);\n"
                      "\t}\n");
            comprintf("\trestore_carry();\n"); /* Reload the X flag into C */
            switch (size)
            {
             case sz_byte:
                comprintf("\tstart_needflags();\n"
                          "\t%s_b(%s,%s);\n",op,dst,src);
                break;
             case sz_word:
                comprintf("\tstart_needflags();\n"
                          "\t%s_w(%s,%s);\n",op,dst,src);
                break;
             case sz_long:
                comprintf("\tstart_needflags();\n"
                          "\t%s_l(%s,%s);\n",op,dst,src);
                break;
            }
            comprintf("\tlive_flags();\n");
            comprintf("\tif (needed_flags&FLAG_Z) {\n"
                      "\tcmov_l_rr(zero,one,5);\n"
                      "\tset_zero(zero, one);\n" /* No longer need one */
                      "\tlive_flags();\n"
                      "\t}\n");
            comprintf("\tend_needflags();\n");
            duplicate_carry();
            comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
            return;
        }
     default:
        failure;
        break;
    }
}

static void 
force_range_for_rox (const char *var, wordsizes size)
{
    /* Could do a modulo operation here... which one is faster? */
    switch (size)
    {
     case sz_long:
        comprintf ("\tif (%s >= 33) %s -= 33;\n", var, var);
        break;
     case sz_word:
        comprintf ("\tif (%s >= 34) %s -= 34;\n", var, var);
        comprintf ("\tif (%s >= 17) %s -= 17;\n", var, var);
        break;
     case sz_byte:
        comprintf ("\tif (%s >= 36) %s -= 36;\n", var, var);
        comprintf ("\tif (%s >= 18) %s -= 18;\n", var, var);
        comprintf ("\tif (%s >= 9) %s -= 9;\n", var, var);
        break;
    }
}

static const char *
cmask (wordsizes size)
{
    switch (size)
    {
     case sz_byte:
        return "0x80";
     case sz_word:
        return "0x8000";
     case sz_long:
        return "0x80000000";
     default:
        abort ();
    }
}

static int 
source_is_imm1_8 (struct instr *i)
{
    return i->stype == 3;
}

static int  /* returns zero for success, non-zero for failure */
gen_opcode (unsigned long int opcode)
{
    struct instr *curi = table68k + opcode;
    char* ssize=NULL;

    insn_n_cycles = 2;
    global_failure=0;
    long_opcode=0;
    global_isjump=0;
    global_iscjump=0;
    global_isaddx=0;
    global_cmov=0;
        global_fpu=0;
    global_mayfail=0;
    hack_opcode=opcode;
    endstr[0]=0;

    start_brace ();
    comprintf("\tuae_u8 scratchie=S1;\n");
    switch (curi->plev)
    {
     case 0:                    /* not privileged */
        break;
     case 1:                    /* unprivileged only on 68000 */
        if (cpu_level == 0)
            break;
        if (next_cpu_level < 0)
            next_cpu_level = 0;

        /* fall through */
     case 2:                    /* priviledged */
        failure;   /* Easy ones first */
        break;
     case 3:                    /* privileged if size == word */
        if (curi->size == sz_byte)
            break;
        failure;
        break;
    }
    switch (curi->size) {
     case sz_byte: ssize="b"; break;
     case sz_word: ssize="w"; break;
     case sz_long: ssize="l"; break;
     default: abort();
    }

    switch (curi->mnemo)
    {
     case i_OR:
     case i_AND:
     case i_EOR:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        switch(curi->mnemo) {
         case i_OR: genflags (flag_or, curi->size, "", "src", "dst"); break;
         case i_AND: genflags (flag_and, curi->size, "", "src", "dst"); break;
         case i_EOR: genflags (flag_eor, curi->size, "", "src", "dst"); break;
        }
        genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
        break;

     case i_ORSR:
     case i_EORSR:
        failure;
        isjump; 
        break;
     case i_ANDSR:
        failure;
        isjump; 
        break;
     case i_SUB:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        genflags (flag_sub, curi->size, "", "src", "dst");
        genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
        break;
     case i_SUBA:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
        start_brace();
        comprintf("\tint tmp=scratchie++;\n");
        switch(curi->size) {
         case sz_byte: comprintf("\tsign_extend_8_rr(tmp,src);\n"); break;
         case sz_word: comprintf("\tsign_extend_16_rr(tmp,src);\n"); break;
         case sz_long: comprintf("\ttmp=src;\n"); break;
         default: abort();
        }
        comprintf("\tsub_l(dst,tmp);\n");
        genastore ("dst", curi->dmode, "dstreg", sz_long, "dst");
        break;
     case i_SUBX:
        isaddx;
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        genflags (flag_subx, curi->size, "", "src", "dst");
        genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
        break;
     case i_SBCD:
        failure;
        /* I don't think so! */
        break;
     case i_ADD:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        genflags (flag_add, curi->size, "", "src", "dst");
        genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
        break;
     case i_ADDA:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
        start_brace();
        comprintf("\tint tmp=scratchie++;\n");
        switch(curi->size) {
         case sz_byte: comprintf("\tsign_extend_8_rr(tmp,src);\n"); break;
         case sz_word: comprintf("\tsign_extend_16_rr(tmp,src);\n"); break;
         case sz_long: comprintf("\ttmp=src;\n"); break;
         default: abort();
        }
        comprintf("\tadd_l(dst,tmp);\n");
        genastore ("dst", curi->dmode, "dstreg", sz_long, "dst");
        break;
     case i_ADDX:
        isaddx;
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        start_brace();
        genflags (flag_addx, curi->size, "", "src", "dst");
        genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
        break;
     case i_ABCD:
        failure;
        /* No BCD maths for me.... */
        break;
     case i_NEG:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        start_brace ();
        comprintf("\tint dst=scratchie++;\n");
        comprintf("\tmov_l_ri(dst,0);\n");
        genflags (flag_sub, curi->size, "", "src", "dst");
        genastore ("dst", curi->smode, "srcreg", curi->size, "src");
        break;
     case i_NEGX:
    isaddx;
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        start_brace ();
        comprintf("\tint dst=scratchie++;\n");
        comprintf("\tmov_l_ri(dst,0);\n");
        genflags (flag_subx, curi->size, "", "src", "dst");
        genastore ("dst", curi->smode, "srcreg", curi->size, "src");
        break;

     case i_NBCD:
        failure;
        /* Nope! */
        break;
     case i_CLR:
        genamode (curi->smode, "srcreg", curi->size, "src", 2, 0);
        start_brace();
        comprintf("\tint dst=scratchie++;\n");
        comprintf("\tmov_l_ri(dst,0);\n");
        genflags (flag_logical, curi->size, "dst", "", "");
        genastore ("dst", curi->smode, "srcreg", curi->size, "src");
        break;
     case i_NOT:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        start_brace ();
        comprintf("\tint dst=scratchie++;\n");
        comprintf("\tmov_l_ri(dst,0xffffffff);\n");
        genflags (flag_eor, curi->size, "", "src", "dst");
        genastore ("dst", curi->smode, "srcreg", curi->size, "src");
        break;
     case i_TST:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genflags (flag_logical, curi->size, "src", "", "");
        break;
     case i_BCHG:
     case i_BCLR:
     case i_BSET:
     case i_BTST:
/*      failure; /* NEW: from "Ipswitch Town" release */
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        start_brace();
        comprintf("\tint s=scratchie++;\n"
                  "\tint tmp=scratchie++;\n"
                  "\tmov_l_rr(s,src);\n");
        if (curi->size == sz_byte)
            comprintf("\tand_l_ri(s,7);\n");
        else
            comprintf("\tand_l_ri(s,31);\n");

        {
            char* op;
            int need_write=1;

            switch(curi->mnemo) {
             case i_BCHG: op="btc"; break;
             case i_BCLR: op="btr"; break;
             case i_BSET: op="bts"; break;
             case i_BTST: op="bt"; need_write=0; break;
            default: abort();
            }
            comprintf("\t%s_l_rr(dst,s);\n"  /* Answer now in C */
                                  "\tsbb_l(s,s);\n" /* s is 0 if bit was 0, -1 otherwise */
                                  "\tmake_flags_live();\n" /* Get the flags back */
                                  "\tdont_care_flags();\n",op);
                if (!noflags) {
                  comprintf("\tstart_needflags();\n"
                                        "\tset_zero(s,tmp);\n"
                                        "\tlive_flags();\n"
                                        "\tend_needflags();\n");
                }
            if (need_write) 
                genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
        }
        break;

     case i_CMPM:
     case i_CMP:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        start_brace ();
        genflags (flag_cmp, curi->size, "", "src", "dst");
        break;
     case i_CMPA:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
        start_brace();
        comprintf("\tint tmps=scratchie++;\n");
        switch(curi->size) {
         case sz_byte: comprintf("\tsign_extend_8_rr(tmps,src);\n"); break;
         case sz_word: comprintf("\tsign_extend_16_rr(tmps,src);\n"); break;
         case sz_long: comprintf("tmps=src;\n"); break;
         default: abort();
        }
        genflags (flag_cmp, sz_long, "", "tmps", "dst");
        break;
        /* The next two are coded a little unconventional, but they are doing
         * weird things... */
     case i_MVPRM:
        isjump; 
        failure;
        break;
     case i_MVPMR:
        isjump; 
        failure;
        break;
     case i_MOVE:
        switch(curi->dmode) {
         case Dreg:
         case Areg:
            genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
            genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
            genflags (flag_mov, curi->size, "", "src", "dst");
            genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
            break;
         default: /* It goes to memory, not a register */
            genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
            genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
            genflags (flag_logical, curi->size, "src", "", "");
            genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
            break;
        }
        break;
     case i_MOVEA:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);

        start_brace();
        comprintf("\tint tmps=scratchie++;\n");
        switch(curi->size) {
         case sz_word: comprintf("\tsign_extend_16_rr(dst,src);\n"); break;
         case sz_long: comprintf("\tmov_l_rr(dst,src);\n"); break;
         default: abort();
        }
        genastore ("dst", curi->dmode, "dstreg", sz_long, "dst");
        break;

     case i_MVSR2:
        isjump; 
        failure;
        break;
     case i_MV2SR:
        isjump; 
        failure;
        break;
     case i_SWAP:
        genamode (curi->smode, "srcreg", sz_long, "src", 1, 0);
        comprintf("\tdont_care_flags();\n");
        comprintf("\trol_l_ri(src,16);\n");
        genflags (flag_logical, sz_long, "src", "", "");
        genastore ("src", curi->smode, "srcreg", sz_long, "src");
        break;
     case i_EXG:
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        start_brace();
        comprintf("\tint tmp=scratchie++;\n"
                  "\tmov_l_rr(tmp,src);\n");
        genastore ("dst", curi->smode, "srcreg", curi->size, "src");
        genastore ("tmp", curi->dmode, "dstreg", curi->size, "dst");
        break;
     case i_EXT:
        genamode (curi->smode, "srcreg", sz_long, "src", 1, 0);
        comprintf("\tdont_care_flags();\n");
        start_brace ();
        switch (curi->size)
        {
         case sz_byte:
            comprintf ("\tint dst = src;\n"
                       "\tsign_extend_8_rr(src,src);\n");
            break;
         case sz_word:
            comprintf ("\tint dst = scratchie++;\n"
                       "\tsign_extend_8_rr(dst,src);\n");
            break;
         case sz_long:
            comprintf ("\tint dst = src;\n"
                       "\tsign_extend_16_rr(src,src);\n");
            break;
         default:
            abort ();
        }
        genflags (flag_logical,
                  curi->size == sz_word ? sz_word : sz_long, "dst", "", "");
        genastore ("dst", curi->smode, "srcreg",
                   curi->size == sz_word ? sz_word : sz_long, "src");
        break;
     case i_MVMEL:
        genmovemel (opcode);
        break;
     case i_MVMLE:
        genmovemle (opcode);
        break;
     case i_TRAP:
        isjump; 
        failure;
        break;
     case i_MVR2USP:
        isjump; 
        failure;
        break;
     case i_MVUSP2R:
        isjump; 
        failure;
        break;
     case i_RESET:
        isjump; 
        failure;
        break;
     case i_NOP:
        break;
     case i_STOP:
        isjump; 
        failure;
        break;
     case i_RTE:
        isjump; 
        failure;
        break;
     case i_RTD:
/*      failure; /* NEW: from "Ipswitch Town" release */
        genamode (curi->smode, "srcreg", curi->size, "offs", 1, 0);
        /* offs is constant */
        comprintf("\tadd_l_ri(offs,4);\n");
        start_brace();
        comprintf("\tint newad=scratchie++;\n"
                  "\treadlong(15,newad,scratchie);\n"
                  "\tmov_l_mr((uintptr)&regs.pc,newad);\n"
                  "\tget_n_addr_jmp(newad,PC_P,scratchie);\n"
                  "\tmov_l_mr((uintptr)&regs.pc_oldp,PC_P);\n"
                  "\tm68k_pc_offset=0;\n"
                  "\tadd_l(15,offs);\n");
        gen_update_next_handler();
        isjump; 
        break;
     case i_LINK:
/*      failure; /* NEW: from "Ipswitch Town" release */
        genamode (curi->smode, "srcreg", sz_long, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "offs", 1, 0);
        comprintf("\tsub_l_ri(15,4);\n"
                  "\twritelong_clobber(15,src,scratchie);\n"
                  "\tmov_l_rr(src,15);\n");
        if (curi->size==sz_word)
            comprintf("\tsign_extend_16_rr(offs,offs);\n");
        comprintf("\tadd_l(15,offs);\n");
        genastore ("src", curi->smode, "srcreg", sz_long, "src");
        break;
     case i_UNLK:
/*      failure; /* NEW: from "Ipswitch Town" release */
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        comprintf("\tmov_l_rr(15,src);\n"
                  "\treadlong(15,src,scratchie);\n"
                  "\tadd_l_ri(15,4);\n");
        genastore ("src", curi->smode, "srcreg", curi->size, "src");
        break;
     case i_RTS:
        comprintf("\tint newad=scratchie++;\n"
                  "\treadlong(15,newad,scratchie);\n"
                  "\tmov_l_mr((uintptr)&regs.pc,newad);\n"
                  "\tget_n_addr_jmp(newad,PC_P,scratchie);\n"
                  "\tmov_l_mr((uintptr)&regs.pc_oldp,PC_P);\n"
                  "\tm68k_pc_offset=0;\n"
                  "\tlea_l_brr(15,15,4);\n");
        gen_update_next_handler();
        isjump; 
        break;
     case i_TRAPV:
        isjump; 
        failure;
        break;
     case i_RTR:
        isjump; 
        failure;
        break;
     case i_JSR:
        isjump; 
        genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
        start_brace();
        comprintf("\tuae_u32 retadd=start_pc+((char *)comp_pc_p-(char *)start_pc_p)+m68k_pc_offset;\n");
        comprintf("\tint ret=scratchie++;\n"
                  "\tmov_l_ri(ret,retadd);\n"
                  "\tsub_l_ri(15,4);\n"
                  "\twritelong_clobber(15,ret,scratchie);\n");
        comprintf("\tmov_l_mr((uintptr)&regs.pc,srca);\n"
                  "\tget_n_addr_jmp(srca,PC_P,scratchie);\n"
                  "\tmov_l_mr((uintptr)&regs.pc_oldp,PC_P);\n"
                  "\tm68k_pc_offset=0;\n");
        gen_update_next_handler();
        break;
     case i_JMP:
        isjump;
        genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
        comprintf("\tmov_l_mr((uintptr)&regs.pc,srca);\n"
                  "\tget_n_addr_jmp(srca,PC_P,scratchie);\n"
                  "\tmov_l_mr((uintptr)&regs.pc_oldp,PC_P);\n"
                  "\tm68k_pc_offset=0;\n");
        gen_update_next_handler();
        break;
     case i_BSR:
        is_const_jump;
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        start_brace();
        comprintf("\tuae_u32 retadd=start_pc+((char *)comp_pc_p-(char *)start_pc_p)+m68k_pc_offset;\n");
        comprintf("\tint ret=scratchie++;\n"
                  "\tmov_l_ri(ret,retadd);\n"
                  "\tsub_l_ri(15,4);\n"
                  "\twritelong_clobber(15,ret,scratchie);\n");
        comprintf("\tadd_l_ri(src,m68k_pc_offset_thisinst+2);\n");
        comprintf("\tm68k_pc_offset=0;\n");
        comprintf("\tadd_l(PC_P,src);\n");

        comprintf("\tcomp_pc_p=(uae_u8*)get_const(PC_P);\n");
        break;
     case i_Bcc:
        comprintf("\tuae_u32 v,v1,v2;\n");
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        /* That source is an immediate, so we can clobber it with abandon */
        switch(curi->size) {
         case sz_byte: comprintf("\tsign_extend_8_rr(src,src);\n"); break;
         case sz_word: comprintf("\tsign_extend_16_rr(src,src);\n"); break;
         case sz_long: break;
        }
        comprintf("\tsub_l_ri(src,m68k_pc_offset-m68k_pc_offset_thisinst-2);\n");
        /* Leave the following as "add" --- it will allow it to be optimized
           away due to src being a constant ;-) */
        comprintf("\tadd_l_ri(src,(uintptr)comp_pc_p);\n");  
        comprintf("\tmov_l_ri(PC_P,(uintptr)comp_pc_p);\n");
        /* Now they are both constant. Might as well fold in m68k_pc_offset */
        comprintf("\tadd_l_ri(src,m68k_pc_offset);\n");
        comprintf("\tadd_l_ri(PC_P,m68k_pc_offset);\n");
        comprintf("\tm68k_pc_offset=0;\n");

        if (curi->cc>=2) {
            comprintf("\tv1=get_const(PC_P);\n"
                      "\tv2=get_const(src);\n"
                      "\tregister_branch(v1,v2,%d);\n",
                      cond_codes_x86[curi->cc]);
            comprintf("\tmake_flags_live();\n"); /* Load the flags */
            isjump; 
        }
        else {
            is_const_jump; 
        }

        switch(curi->cc) {
         case 0:  /* Unconditional jump */
            comprintf("\tmov_l_rr(PC_P,src);\n"); 
            comprintf("\tcomp_pc_p=(uae_u8*)get_const(PC_P);\n");
            break;
         case 1: break; /* This is silly! */
         case 8: failure; break;  /* Work out details! FIXME */
         case 9: failure; break;  /* Not critical, though! */

         case 2:
         case 3:
         case 4:
         case 5:
         case 6:
         case 7:
         case 10:
         case 11:
         case 12:
         case 13:
         case 14:
         case 15: 
            break;
         default: abort();
        }
        break;
     case i_LEA:
        genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
        genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
        genastore ("srca", curi->dmode, "dstreg", curi->size, "dst");
        break;
     case i_PEA:
        if (table68k[opcode].smode==Areg || 
            table68k[opcode].smode==Aind || 
            table68k[opcode].smode==Aipi || 
            table68k[opcode].smode==Apdi || 
            table68k[opcode].smode==Ad16 || 
            table68k[opcode].smode==Ad8r) 
            comprintf("if (srcreg==7) dodgy=1;\n");

        genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
        genamode (Apdi, "7", sz_long, "dst", 2, 0);
        genastore ("srca", Apdi, "7", sz_long, "dst");
        break;
     case i_DBcc:
        isjump; 
        uses_cmov;
        genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "offs", 1, 0);

        /* That offs is an immediate, so we can clobber it with abandon */
        switch(curi->size) {
         case sz_word: comprintf("\tsign_extend_16_rr(offs,offs);\n"); break;
         default: abort();  /* Seems this only comes in word flavour */
        }
        comprintf("\tsub_l_ri(offs,m68k_pc_offset-m68k_pc_offset_thisinst-2);\n"); 
        comprintf("\tadd_l_ri(offs,(uintptr)comp_pc_p);\n"); /* New PC, 
                                                                once the 
                                                                offset_68k is
                                                                * also added */
        /* Let's fold in the m68k_pc_offset at this point */
        comprintf("\tadd_l_ri(offs,m68k_pc_offset);\n");
        comprintf("\tadd_l_ri(PC_P,m68k_pc_offset);\n");
        comprintf("\tm68k_pc_offset=0;\n");

        start_brace();
        comprintf("\tint nsrc=scratchie++;\n");

        if (curi->cc>=2) {
            comprintf("\tmake_flags_live();\n"); /* Load the flags */
        }

        if (curi->size!=sz_word) 
            abort();


        switch(curi->cc) {
         case 0: /* This is an elaborate nop? */
            break;
         case 1: 
            comprintf("\tstart_needflags();\n");
            comprintf("\tsub_w_ri(src,1);\n");
            comprintf("\t end_needflags();\n");
            start_brace();
            comprintf("\tuae_u32 v2,v;\n"
                      "\tuae_u32 v1=get_const(PC_P);\n");
            comprintf("\tv2=get_const(offs);\n"
                      "\tregister_branch(v1,v2,3);\n");
            break;

         case 8: failure; break;  /* Work out details! FIXME */
         case 9: failure; break;  /* Not critical, though! */

         case 2:
         case 3:
         case 4:
         case 5:
         case 6:
         case 7:
         case 10:
         case 11:
         case 12:
         case 13:
         case 14:
         case 15:
            comprintf("\tmov_l_rr(nsrc,src);\n");
            comprintf("\tlea_l_brr(scratchie,src,(uae_s32)-1);\n"
                      "\tmov_w_rr(src,scratchie);\n");
            comprintf("\tcmov_l_rr(offs,PC_P,%d);\n",
                      cond_codes_x86[curi->cc]);
            comprintf("\tcmov_l_rr(src,nsrc,%d);\n",
                      cond_codes_x86[curi->cc]);
            /* OK, now for cc=true, we have src==nsrc and offs==PC_P, 
               so whether we move them around doesn't matter. However,
               if cc=false, we have offs==jump_pc, and src==nsrc-1 */

            comprintf("\t start_needflags();\n");
            comprintf("\ttest_w_rr(nsrc,nsrc);\n"); 
            comprintf("\t end_needflags();\n");
            comprintf("\tcmov_l_rr(PC_P,offs,5);\n"); 
            break;
         default: abort();
        }
        genastore ("src", curi->smode, "srcreg", curi->size, "src");
        gen_update_next_handler();
        break;

     case i_Scc:
/*      failure; /* NEW: from "Ipswitch Town" release */
        genamode (curi->smode, "srcreg", curi->size, "src", 2, 0);
        start_brace ();
        comprintf ("\tint val = scratchie++;\n");

        /* We set val to 0 if we really should use 255, and to 1 for real 0 */
        switch(curi->cc) {
         case 0:  /* Unconditional set */
            comprintf("\tmov_l_ri(val,0);\n"); 
            break;
         case 1: 
            /* Unconditional not-set */
            comprintf("\tmov_l_ri(val,1);\n"); 
            break;
         case 8: failure; break;  /* Work out details! FIXME */
         case 9: failure; break;  /* Not critical, though! */

         case 2:
         case 3:
         case 4:
         case 5:
         case 6:
         case 7:
         case 10:
         case 11:
         case 12:
         case 13:
         case 14:
         case 15:
            comprintf("\tmake_flags_live();\n"); /* Load the flags */
            /* All condition codes can be inverted by changing the LSB */
            comprintf("\tsetcc(val,%d);\n",
                      cond_codes_x86[curi->cc]^1); break;
         default: abort();
        }
        comprintf("\tsub_b_ri(val,1);\n");
        genastore ("val", curi->smode, "srcreg", curi->size, "src");
        break;
     case i_DIVU:
        isjump; 
        failure;
        break;
     case i_DIVS:
        isjump; 
        failure;
        break;
     case i_MULU:
/*      failure; /* NEW: from "Ipswitch Town" release */
        comprintf("\tdont_care_flags();\n");
        genamode (curi->smode, "srcreg", sz_word, "src", 1, 0);
        genamode (curi->dmode, "dstreg", sz_word, "dst", 1, 0);
        /* To do 16x16 unsigned multiplication, we actually use 
           32x32 signed, and zero-extend the registers first.
           That solves the problem of MUL needing dedicated registers
           on the x86 */
        comprintf("\tzero_extend_16_rr(scratchie,src);\n"
                  "\tzero_extend_16_rr(dst,dst);\n"
                  "\timul_32_32(dst,scratchie);\n");
        genflags (flag_logical, sz_long, "dst", "", "");
        genastore ("dst", curi->dmode, "dstreg", sz_long, "dst");
        break;
     case i_MULS:
/*      failure; /* NEW: from "Ipswitch Town" release */
        comprintf("\tdont_care_flags();\n");
        genamode (curi->smode, "srcreg", sz_word, "src", 1, 0);
        genamode (curi->dmode, "dstreg", sz_word, "dst", 1, 0);
        comprintf("\tsign_extend_16_rr(scratchie,src);\n"
                  "\tsign_extend_16_rr(dst,dst);\n"
                  "\timul_32_32(dst,scratchie);\n");
        genflags (flag_logical, sz_long, "dst", "", "");
        genastore ("dst", curi->dmode, "dstreg", sz_long, "dst");
        break;
     case i_CHK:
        isjump; 
        failure;
        break;

     case i_CHK2:
        isjump; 
        failure;
        break;

     case i_ASR:
    mayfail;
        if (curi->smode==Dreg) {
          comprintf("if ((uae_u32)srcreg==(uae_u32)dstreg) {\n"
                                "  FAIL(1);\n"
                                "  return;\n"
                                "} \n");
          start_brace();
        }
        comprintf("\tdont_care_flags();\n");

        genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
        if (curi->smode!=immi) {
/*              failure; /* UNTESTED: NEW: from "Ipswitch Town" release */
            if (!noflags) {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n"
                          "\tint width;\n"
                          "\tint cdata=scratchie++;\n"
                          "\tint tmpcnt=scratchie++;\n"
                          "\tint highshift=scratchie++;\n");
                comprintf("\tmov_l_rr(tmpcnt,cnt);\n"
                          "\tand_l_ri(tmpcnt,63);\n"
                          "\tmov_l_ri(cdata,0);\n"
                          "\tcmov_l_rr(cdata,data,5);\n");
                /* cdata is now either data (for shift count!=0) or
                   0 (for shift count==0) */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshra_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"
                                         "\twidth=8;\n"); 
                 break;
                 case sz_word: comprintf("\tshra_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"
                                         "\twidth=16;\n"); 
                 break;
                 case sz_long: comprintf("\tshra_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"
                                         "\twidth=32;\n"); 
                 break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(highshift,0);\n"
                          "mov_l_ri(scratchie,width/2);\n"
                          "cmov_l_rr(highshift,scratchie,5);\n");
                /* The x86 masks out bits, so we now make sure that things
                   really get shifted as much as planned */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshra_b_rr(data,highshift);\n");break;
                 case sz_word: comprintf("\tshra_w_rr(data,highshift);\n");break;
                 case sz_long: comprintf("\tshra_l_rr(data,highshift);\n");break;
                 default: abort();
                }
                /* And again */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshra_b_rr(data,highshift);\n");break;
                 case sz_word: comprintf("\tshra_w_rr(data,highshift);\n");break;
                 case sz_long: comprintf("\tshra_l_rr(data,highshift);\n");break;
                 default: abort();
                }
                
                /* Result of shift is now in data. Now we need to determine
                   the carry by shifting cdata one less */
                comprintf("\tsub_l_ri(tmpcnt,1);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshra_b_rr(cdata,tmpcnt);\n");break;
                 case sz_word: comprintf("\tshra_w_rr(cdata,tmpcnt);\n");break;
                 case sz_long: comprintf("\tshra_l_rr(cdata,tmpcnt);\n");break;
                 default: abort();
                }
                /* If the shift count was higher than the width, we need
                   to pick up the sign from data */
                comprintf("test_l_ri(tmpcnt,highmask);\n"
                          "cmov_l_rr(cdata,data,5);\n");
                /* And create the flags */
                comprintf("\tstart_needflags();\n");
                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
                }
                comprintf("\t bt_l_ri(cdata,0);\n"); /* Set C */
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
            else {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n"
                          "\tint width;\n"
                          "\tint highshift=scratchie++;\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshra_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"
                                         "\twidth=8;\n"); 
                 break;
                 case sz_word: comprintf("\tshra_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"
                                         "\twidth=16;\n"); 
                 break;
                 case sz_long: comprintf("\tshra_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"
                                         "\twidth=32;\n"); 
                 break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(highshift,0);\n"
                          "mov_l_ri(scratchie,width/2);\n"
                          "cmov_l_rr(highshift,scratchie,5);\n");
                /* The x86 masks out bits, so we now make sure that things
                   really get shifted as much as planned */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshra_b_rr(data,highshift);\n");break;
                 case sz_word: comprintf("\tshra_w_rr(data,highshift);\n");break;
                 case sz_long: comprintf("\tshra_l_rr(data,highshift);\n");break;
                 default: abort();
                }
                /* And again */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshra_b_rr(data,highshift);\n");break;
                 case sz_word: comprintf("\tshra_w_rr(data,highshift);\n");break;
                 case sz_long: comprintf("\tshra_l_rr(data,highshift);\n");break;
                 default: abort();
                }
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
        }
        else {
            start_brace();
            comprintf("\tint tmp=scratchie++;\n"
                      "\tint bp;\n"
                      "\tmov_l_rr(tmp,data);\n");
            switch(curi->size) {
             case sz_byte: comprintf("\tshra_b_ri(data,srcreg);\n"
                                     "\tbp=srcreg-1;\n"); break;
             case sz_word: comprintf("\tshra_w_ri(data,srcreg);\n"
                                     "\tbp=srcreg-1;\n"); break;
             case sz_long: comprintf("\tshra_l_ri(data,srcreg);\n"
                                     "\tbp=srcreg-1;\n"); break;
             default: abort();
            }

            if (!noflags) {
                comprintf("\tstart_needflags();\n");
                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
                }
                comprintf("\t bt_l_ri(tmp,bp);\n"); /* Set C */
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
            }
            genastore ("data", curi->dmode, "dstreg", curi->size, "data");
        }
        break;

     case i_ASL:
/*      failure; /* NEW: from "Ipswitch Town" release */
    mayfail;
        if (curi->smode==Dreg) {
          comprintf("if ((uae_u32)srcreg==(uae_u32)dstreg) {\n"
                                "  FAIL(1);\n"
                                "  return;\n"
                                "} \n");
          start_brace();
        }
        comprintf("\tdont_care_flags();\n");
        /* Except for the handling of the V flag, this is identical to
           LSL. The handling of V is, uhm, unpleasant, so if it's needed,
           let the normal emulation handle it. Shoulders of giants kinda
           thing ;-) */
        comprintf("if (needed_flags & FLAG_V) {\n"
                  "  FAIL(1);\n"
                  "  return;\n"
                  "} \n");
        
        genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
        if (curi->smode!=immi) {
            if (!noflags) {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n"
                          "\tint cdata=scratchie++;\n"
                          "\tint tmpcnt=scratchie++;\n");
                comprintf("\tmov_l_rr(tmpcnt,cnt);\n"
                          "\tand_l_ri(tmpcnt,63);\n"
                          "\tmov_l_ri(cdata,0);\n"
                          "\tcmov_l_rr(cdata,data,5);\n");
                /* cdata is now either data (for shift count!=0) or
                   0 (for shift count==0) */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshll_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"); 
                 break;
                 case sz_word: comprintf("\tshll_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"); 
                 break;
                 case sz_long: comprintf("\tshll_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"); 
                 break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(scratchie,data,4);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tmov_b_rr(data,scratchie);\n");break;
                 case sz_word: comprintf("\tmov_w_rr(data,scratchie);\n");break;
                 case sz_long: comprintf("\tmov_l_rr(data,scratchie);\n");break;
                 default: abort();
                }
                /* Result of shift is now in data. Now we need to determine
                   the carry by shifting cdata one less */
                comprintf("\tsub_l_ri(tmpcnt,1);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshll_b_rr(cdata,tmpcnt);\n");break;
                 case sz_word: comprintf("\tshll_w_rr(cdata,tmpcnt);\n");break;
                 case sz_long: comprintf("\tshll_l_rr(cdata,tmpcnt);\n");break;
                 default: abort();
                }
                comprintf("test_l_ri(tmpcnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(cdata,scratchie,5);\n");
                /* And create the flags */
                comprintf("\tstart_needflags();\n");

                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); 
                    comprintf("\t bt_l_ri(cdata,7);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); 
                    comprintf("\t bt_l_ri(cdata,15);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); 
                    comprintf("\t bt_l_ri(cdata,31);\n"); break;
                }
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
            else {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshll_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"); 
                    break;
                 case sz_word: comprintf("\tshll_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"); 
                    break;
                 case sz_long: comprintf("\tshll_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"); 
                    break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(scratchie,data,4);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tmov_b_rr(data,scratchie);\n");break;
                 case sz_word: comprintf("\tmov_w_rr(data,scratchie);\n");break;
                 case sz_long: comprintf("\tmov_l_rr(data,scratchie);\n");break;
                 default: abort();
                }
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
        }
        else {
            start_brace();
            comprintf("\tint tmp=scratchie++;\n"
                      "\tint bp;\n"
                      "\tmov_l_rr(tmp,data);\n");
            switch(curi->size) {
             case sz_byte: comprintf("\tshll_b_ri(data,srcreg);\n"
                                     "\tbp=8-srcreg;\n"); break;
             case sz_word: comprintf("\tshll_w_ri(data,srcreg);\n"
                                     "\tbp=16-srcreg;\n"); break;
             case sz_long: comprintf("\tshll_l_ri(data,srcreg);\n"
                                     "\tbp=32-srcreg;\n"); break;
             default: abort();
            }

            if (!noflags) {
                comprintf("\tstart_needflags();\n");
                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
                }
                comprintf("\t bt_l_ri(tmp,bp);\n"); /* Set C */
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
            }
            genastore ("data", curi->dmode, "dstreg", curi->size, "data");
        }
        break;
    
     case i_LSR:
/*      failure; /* NEW: from "Ipswitch Town" release */
    mayfail;
        if (curi->smode==Dreg) {
          comprintf("if ((uae_u32)srcreg==(uae_u32)dstreg) {\n"
                                "  FAIL(1);\n"
                                "  return;\n"
                                "} \n");
          start_brace();
        }
        comprintf("\tdont_care_flags();\n");

        genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
        if (curi->smode!=immi) {
            if (!noflags) {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n"
                          "\tint cdata=scratchie++;\n"
                          "\tint tmpcnt=scratchie++;\n");
                comprintf("\tmov_l_rr(tmpcnt,cnt);\n"
                          "\tand_l_ri(tmpcnt,63);\n"
                          "\tmov_l_ri(cdata,0);\n"
                          "\tcmov_l_rr(cdata,data,5);\n");
                /* cdata is now either data (for shift count!=0) or
                   0 (for shift count==0) */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshrl_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"); 
                 break;
                 case sz_word: comprintf("\tshrl_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"); 
                 break;
                 case sz_long: comprintf("\tshrl_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"); 
                 break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(scratchie,data,4);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tmov_b_rr(data,scratchie);\n");break;
                 case sz_word: comprintf("\tmov_w_rr(data,scratchie);\n");break;
                 case sz_long: comprintf("\tmov_l_rr(data,scratchie);\n");break;
                 default: abort();
                }
                /* Result of shift is now in data. Now we need to determine
                   the carry by shifting cdata one less */
                comprintf("\tsub_l_ri(tmpcnt,1);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshrl_b_rr(cdata,tmpcnt);\n");break;
                 case sz_word: comprintf("\tshrl_w_rr(cdata,tmpcnt);\n");break;
                 case sz_long: comprintf("\tshrl_l_rr(cdata,tmpcnt);\n");break;
                 default: abort();
                }
                comprintf("test_l_ri(tmpcnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(cdata,scratchie,5);\n");
                /* And create the flags */
                comprintf("\tstart_needflags();\n");
                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
                }
                comprintf("\t bt_l_ri(cdata,0);\n"); /* Set C */
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
            else {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshrl_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"); 
                    break;
                 case sz_word: comprintf("\tshrl_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"); 
                    break;
                 case sz_long: comprintf("\tshrl_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"); 
                    break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(scratchie,data,4);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tmov_b_rr(data,scratchie);\n");break;
                 case sz_word: comprintf("\tmov_w_rr(data,scratchie);\n");break;
                 case sz_long: comprintf("\tmov_l_rr(data,scratchie);\n");break;
                 default: abort();
                }
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
        }
        else {
            start_brace();
            comprintf("\tint tmp=scratchie++;\n"
                      "\tint bp;\n"
                      "\tmov_l_rr(tmp,data);\n");
            switch(curi->size) {
             case sz_byte: comprintf("\tshrl_b_ri(data,srcreg);\n"
                                     "\tbp=srcreg-1;\n"); break;
             case sz_word: comprintf("\tshrl_w_ri(data,srcreg);\n"
                                     "\tbp=srcreg-1;\n"); break;
             case sz_long: comprintf("\tshrl_l_ri(data,srcreg);\n"
                                     "\tbp=srcreg-1;\n"); break;
             default: abort();
            }

            if (!noflags) {
                comprintf("\tstart_needflags();\n");
                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
                }
                comprintf("\t bt_l_ri(tmp,bp);\n"); /* Set C */
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
            }
            genastore ("data", curi->dmode, "dstreg", curi->size, "data");
        }
        break;

     case i_LSL:
    mayfail;
        if (curi->smode==Dreg) {
          comprintf("if ((uae_u32)srcreg==(uae_u32)dstreg) {\n"
                                "  FAIL(1);\n"
                                "  return;\n"
                                "} \n");
          start_brace();
        }
        comprintf("\tdont_care_flags();\n");

        genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
        if (curi->smode!=immi) {
/*              failure; /* UNTESTED: NEW: from "Ipswitch Town" release */
            if (!noflags) {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n"
                          "\tint cdata=scratchie++;\n"
                          "\tint tmpcnt=scratchie++;\n");
                comprintf("\tmov_l_rr(tmpcnt,cnt);\n"
                          "\tand_l_ri(tmpcnt,63);\n"
                          "\tmov_l_ri(cdata,0);\n"
                          "\tcmov_l_rr(cdata,data,5);\n");
                /* cdata is now either data (for shift count!=0) or
                   0 (for shift count==0) */
                switch(curi->size) {
                 case sz_byte: comprintf("\tshll_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"); 
                 break;
                 case sz_word: comprintf("\tshll_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"); 
                 break;
                 case sz_long: comprintf("\tshll_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"); 
                 break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(scratchie,data,4);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tmov_b_rr(data,scratchie);\n");break;
                 case sz_word: comprintf("\tmov_w_rr(data,scratchie);\n");break;
                 case sz_long: comprintf("\tmov_l_rr(data,scratchie);\n");break;
                 default: abort();
                }
                /* Result of shift is now in data. Now we need to determine
                   the carry by shifting cdata one less */
                comprintf("\tsub_l_ri(tmpcnt,1);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshll_b_rr(cdata,tmpcnt);\n");break;
                 case sz_word: comprintf("\tshll_w_rr(cdata,tmpcnt);\n");break;
                 case sz_long: comprintf("\tshll_l_rr(cdata,tmpcnt);\n");break;
                 default: abort();
                }
                comprintf("test_l_ri(tmpcnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(cdata,scratchie,5);\n");
                /* And create the flags */
                comprintf("\tstart_needflags();\n");
                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); 
                    comprintf("\t bt_l_ri(cdata,7);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); 
                    comprintf("\t bt_l_ri(cdata,15);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); 
                    comprintf("\t bt_l_ri(cdata,31);\n"); break;
                }
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
            else {
                uses_cmov;
                start_brace();
                comprintf("\tint highmask;\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tshll_b_rr(data,cnt);\n"
                                         "\thighmask=0x38;\n"); 
                    break;
                 case sz_word: comprintf("\tshll_w_rr(data,cnt);\n"
                                         "\thighmask=0x30;\n"); 
                    break;
                 case sz_long: comprintf("\tshll_l_rr(data,cnt);\n"
                                         "\thighmask=0x20;\n"); 
                    break;
                 default: abort();
                }
                comprintf("test_l_ri(cnt,highmask);\n"
                          "mov_l_ri(scratchie,0);\n"
                          "cmov_l_rr(scratchie,data,4);\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\tmov_b_rr(data,scratchie);\n");break;
                 case sz_word: comprintf("\tmov_w_rr(data,scratchie);\n");break;
                 case sz_long: comprintf("\tmov_l_rr(data,scratchie);\n");break;
                 default: abort();
                }
                genastore ("data", curi->dmode, "dstreg", curi->size, "data");
            }
        }
        else {
            start_brace();
            comprintf("\tint tmp=scratchie++;\n"
                      "\tint bp;\n"
                      "\tmov_l_rr(tmp,data);\n");
            switch(curi->size) {
             case sz_byte: comprintf("\tshll_b_ri(data,srcreg);\n"
                                     "\tbp=8-srcreg;\n"); break;
             case sz_word: comprintf("\tshll_w_ri(data,srcreg);\n"
                                     "\tbp=16-srcreg;\n"); break;
             case sz_long: comprintf("\tshll_l_ri(data,srcreg);\n"
                                     "\tbp=32-srcreg;\n"); break;
             default: abort();
            }

            if (!noflags) {
                comprintf("\tstart_needflags();\n");
                comprintf("\tif (needed_flags & FLAG_ZNV)\n");
                switch(curi->size) {
                 case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
                 case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
                 case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
                }
                comprintf("\t bt_l_ri(tmp,bp);\n"); /* Set C */
                comprintf("\t live_flags();\n");
                comprintf("\t end_needflags();\n");
                comprintf("\t duplicate_carry();\n");
                comprintf("if (!(needed_flags & FLAG_CZNV)) dont_care_flags();\n");
            }
            genastore ("data", curi->dmode, "dstreg", curi->size, "data");
        }
        break;

     case i_ROL:
    mayfail;
        if (curi->smode==Dreg) {
          comprintf("if ((uae_u32)srcreg==(uae_u32)dstreg) {\n"
                                "  FAIL(1);\n"
                                "  return;\n"
                                "} \n");
          start_brace();
        }
        comprintf("\tdont_care_flags();\n");
        genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
        start_brace ();

        switch(curi->size) {
         case sz_long: comprintf("\t rol_l_rr(data,cnt);\n"); break;
         case sz_word: comprintf("\t rol_w_rr(data,cnt);\n"); break;
         case sz_byte: comprintf("\t rol_b_rr(data,cnt);\n"); break;
        }
      
        if (!noflags) {
            comprintf("\tstart_needflags();\n");
            comprintf("\tif (needed_flags & FLAG_ZNV)\n");
            switch(curi->size) {
             case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
             case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
             case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
            }
            comprintf("\t bt_l_ri(data,0x00);\n"); /* Set C */
            comprintf("\t live_flags();\n");
            comprintf("\t end_needflags();\n");
        }
        genastore ("data", curi->dmode, "dstreg", curi->size, "data");
        break;

     case i_ROR:
    mayfail;
        if (curi->smode==Dreg) {
          comprintf("if ((uae_u32)srcreg==(uae_u32)dstreg) {\n"
                                "  FAIL(1);\n"
                                "  return;\n"
                                "} \n");
          start_brace();
        }
        comprintf("\tdont_care_flags();\n");
        genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
        genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
        start_brace ();

        switch(curi->size) {
         case sz_long: comprintf("\t ror_l_rr(data,cnt);\n"); break;
         case sz_word: comprintf("\t ror_w_rr(data,cnt);\n"); break;
         case sz_byte: comprintf("\t ror_b_rr(data,cnt);\n"); break;
        }
      
        if (!noflags) {
            comprintf("\tstart_needflags();\n");
            comprintf("\tif (needed_flags & FLAG_ZNV)\n");
            switch(curi->size) {
             case sz_byte: comprintf("\t  test_b_rr(data,data);\n"); break;
             case sz_word: comprintf("\t  test_w_rr(data,data);\n"); break;
             case sz_long: comprintf("\t  test_l_rr(data,data);\n"); break;
            }
            switch(curi->size) {
             case sz_byte: comprintf("\t bt_l_ri(data,0x07);\n"); break;
             case sz_word: comprintf("\t bt_l_ri(data,0x0f);\n"); break;
             case sz_long: comprintf("\t bt_l_ri(data,0x1f);\n"); break;
            }
            comprintf("\t live_flags();\n");
            comprintf("\t end_needflags();\n");
        }
        genastore ("data", curi->dmode, "dstreg", curi->size, "data");
        break;

     case i_ROXL:
        failure;
        break;
     case i_ROXR:
        failure;
        break;
     case i_ASRW:
        failure;
        break;
     case i_ASLW:
        failure;
        break;
     case i_LSRW:
        failure;
        break;
     case i_LSLW:
        failure;
        break;
     case i_ROLW:
        failure;
        break;
     case i_RORW:
        failure;
        break;
     case i_ROXLW:
        failure;
        break;
     case i_ROXRW:
        failure;
        break;
     case i_MOVEC2:
        isjump; 
        failure;
        break;
     case i_MOVE2C:
        isjump; 
        failure;
        break;
     case i_CAS:
        failure;
        break;
     case i_CAS2:
        failure;
        break;
     case i_MOVES:              /* ignore DFC and SFC because we have no MMU */
        isjump; 
        failure;
        break;
     case i_BKPT:               /* only needed for hardware emulators */
        isjump; 
        failure;
        break;
     case i_CALLM:              /* not present in 68030 */
        isjump; 
        failure;
        break;
     case i_RTM:                /* not present in 68030 */
        isjump; 
        failure;
        break;
     case i_TRAPcc:
        isjump; 
        failure;
        break;
     case i_DIVL:
        isjump; 
        failure;
        break;
     case i_MULL:
/*      failure; /* NEW: from "Ipswitch Town" release */
        if (!noflags) {
            failure;
            break;
        }
        comprintf("\tuae_u16 extra=%s;\n",gen_nextiword());
        comprintf("\tint r2=(extra>>12)&7;\n"
                  "\tint tmp=scratchie++;\n");
       
        genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
        /* The two operands are in dst and r2 */
        comprintf("\tif (extra&0x0400) {\n" /* Need full 64 bit result */
                  "\tint r3=(extra&7);\n"
                  "\tmov_l_rr(r3,dst);\n"); /* operands now in r3 and r2 */
        comprintf("\tif (extra&0x0800) { \n" /* signed */
                  "\t\timul_64_32(r2,r3);\n"
                  "\t} else { \n"
                  "\t\tmul_64_32(r2,r3);\n"
                  "\t} \n");
        /* The result is in r2/tmp, with r2 holding the lower 32 bits */
        comprintf("\t} else {\n");  /* Only want 32 bit result */
        /* operands in dst and r2, result foes into r2 */
        /* shouldn't matter whether it's signed or unsigned?!? */
        comprintf("\timul_32_32(r2,dst);\n"
                  "\t}\n");
        break;

     case i_BFTST:
     case i_BFEXTU:
     case i_BFCHG:
     case i_BFEXTS:
     case i_BFCLR:
     case i_BFFFO:
     case i_BFSET:
     case i_BFINS:
        failure;
        break;
     case i_PACK:
        failure;
        break;
     case i_UNPK:
        failure;
        break;
     case i_TAS:
        failure;
        break;
     case i_FPP:
        uses_fpu;
#ifdef USE_JIT_FPU
        mayfail;
        comprintf("\tuae_u16 extra=%s;\n",gen_nextiword());
        swap_opcode();
        comprintf("\tcomp_fpp_opp(opcode,extra);\n");
#else
        failure;
#endif
        break;
     case i_FBcc:
        uses_fpu;
#ifdef USE_JIT_FPU
        isjump;
        uses_cmov;
        mayfail;
        swap_opcode();
        comprintf("\tcomp_fbcc_opp(opcode);\n");
#else
        isjump; 
        failure;
#endif
        break;
     case i_FDBcc:
        uses_fpu;
        isjump; 
        failure;
        break;
     case i_FScc:
        uses_fpu;
#ifdef USE_JIT_FPU
        mayfail;
        uses_cmov;
        comprintf("\tuae_u16 extra=%s;\n",gen_nextiword());
        swap_opcode();
        comprintf("\tcomp_fscc_opp(opcode,extra);\n");
#else
        failure;
#endif
        break;
     case i_FTRAPcc:
        uses_fpu;
        isjump; 
        failure;
        break;
     case i_FSAVE:
        uses_fpu;
        failure;
        break;
     case i_FRESTORE:
        uses_fpu;
        failure;
        break;

     case i_CINVL:
     case i_CINVP:
     case i_CINVA:
        isjump;  /* Not really, but it's probably a good idea to stop 
                    translating at this point */
        failure;
        comprintf ("\tflush_icache();\n");  /* Differentiate a bit more? */
        break;
     case i_CPUSHL:
     case i_CPUSHP:
     case i_CPUSHA:
        isjump;  /* Not really, but it's probably a good idea to stop 
                    translating at this point */
        failure;
        break;
     case i_MOVE16:
        genmov16(opcode, curi);
        break;

        case i_EMULOP_RETURN:
        isjump;
        failure;
        break;
        
        case i_EMULOP:
        failure;
        break;
        
     case i_MMUOP:
        isjump; 
        failure;
        break;
     default:
        abort ();
        break;
    }
    comprintf("%s",endstr);
    finish_braces ();
    sync_m68k_pc ();
    if (global_mayfail)
        comprintf("\tif (failure)  m68k_pc_offset=m68k_pc_offset_thisinst;\n");
    return global_failure;
}

static void 
generate_includes (FILE * f)
{
    fprintf (f, "#include \"sysdeps.h\"\n");
        fprintf (f, "#include \"m68k.h\"\n");
    fprintf (f, "#include \"memory.h\"\n");
    fprintf (f, "#include \"readcpu.h\"\n");
    fprintf (f, "#include \"newcpu.h\"\n");
    fprintf (f, "#include \"comptbl.h\"\n");
}

static int postfix;

static void 
generate_one_opcode (int rp, int noflags)
{
    uae_u16 smsk, dmsk;
    const long int opcode = opcode_map[rp];
    const char *opcode_str;
    int aborted=0;
    int have_srcreg=0;
    int have_dstreg=0;

    if (table68k[opcode].mnemo == i_ILLG
        || table68k[opcode].clev > cpu_level)
        return;

    if (table68k[opcode].handler != -1)
        return;

    switch (table68k[opcode].stype)
    {
     case 0:
        smsk = 7;
        break;
     case 1:
        smsk = 255;
        break;
     case 2:
        smsk = 15;
        break;
     case 3:
        smsk = 7;
        break;
     case 4:
        smsk = 7;
        break;
     case 5:
        smsk = 63;
        break;
         case 6:
        smsk = 255;
        break;
         case 7:
        smsk = 3;
        break;
     default:
        abort ();
    }
    dmsk = 7;

    next_cpu_level = -1;
    if (table68k[opcode].suse
        && table68k[opcode].smode != imm && table68k[opcode].smode != imm0
        && table68k[opcode].smode != imm1 && table68k[opcode].smode != imm2
        && table68k[opcode].smode != absw && table68k[opcode].smode != absl
        && table68k[opcode].smode != PC8r && table68k[opcode].smode != PC16)
    {
        have_srcreg=1;
        if (table68k[opcode].spos == -1)
        {
            if (((int) table68k[opcode].sreg) >= 128)
                comprintf ("\tuae_s32 srcreg = (uae_s32)(uae_s8)%d;\n", (int) table68k[opcode].sreg);
            else
                comprintf ("\tuae_s32 srcreg = %d;\n", (int) table68k[opcode].sreg);
        }
        else
        {
            char source[100];
            int pos = table68k[opcode].spos;
          
            comprintf ("#ifdef HAVE_GET_WORD_UNSWAPPED\n");
                
            if (pos < 8 && (smsk >> (8 - pos)) != 0)
                sprintf (source, "(((opcode >> %d) | (opcode << %d)) & %d)",
                        pos ^ 8, 8 - pos, dmsk);
            else if (pos != 8)
                sprintf (source, "((opcode >> %d) & %d)", pos ^ 8, smsk);
            else
                sprintf (source, "(opcode & %d)", smsk);
                
            if (table68k[opcode].stype == 3)
                comprintf ("\tuae_u32 srcreg = imm8_table[%s];\n", source);
            else if (table68k[opcode].stype == 1)
                comprintf ("\tuae_u32 srcreg = (uae_s32)(uae_s8)%s;\n", source);
            else
                comprintf ("\tuae_u32 srcreg = %s;\n", source);
                
            comprintf ("#else\n");
                
            if (pos)
                sprintf (source, "((opcode >> %d) & %d)", pos, smsk);
            else
                sprintf (source, "(opcode & %d)", smsk);

            if (table68k[opcode].stype == 3)
                comprintf ("\tuae_s32 srcreg = imm8_table[%s];\n", source);
            else if (table68k[opcode].stype == 1)
                comprintf ("\tuae_s32 srcreg = (uae_s32)(uae_s8)%s;\n", source);
            else
                comprintf ("\tuae_s32 srcreg = %s;\n", source);
                
                comprintf ("#endif\n");
        }
    }
    if (table68k[opcode].duse
        /* Yes, the dmode can be imm, in case of LINK or DBcc */
        && table68k[opcode].dmode != imm && table68k[opcode].dmode != imm0
        && table68k[opcode].dmode != imm1 && table68k[opcode].dmode != imm2
        && table68k[opcode].dmode != absw && table68k[opcode].dmode != absl)
    {
        have_dstreg=1;
        if (table68k[opcode].dpos == -1)
        {
            if (((int) table68k[opcode].dreg) >= 128)
                comprintf ("\tuae_s32 dstreg = (uae_s32)(uae_s8)%d;\n", (int) table68k[opcode].dreg);
            else
                comprintf ("\tuae_s32 dstreg = %d;\n", (int) table68k[opcode].dreg);
        }
        else
        {
            int pos = table68k[opcode].dpos;
          
            comprintf ("#ifdef HAVE_GET_WORD_UNSWAPPED\n");
                
            if (pos < 8 && (dmsk >> (8 - pos)) != 0)
                comprintf ("\tuae_u32 dstreg = ((opcode >> %d) | (opcode << %d)) & %d;\n",
                        pos ^ 8, 8 - pos, dmsk);
            else if (pos != 8)
                comprintf ("\tuae_u32 dstreg = (opcode >> %d) & %d;\n",
                        pos ^ 8, dmsk);
            else
                comprintf ("\tuae_u32 dstreg = opcode & %d;\n", dmsk);
                
                comprintf ("#else\n");
                
            if (pos)
                comprintf ("\tuae_u32 dstreg = (opcode >> %d) & %d;\n",
                           pos, dmsk);
            else
                comprintf ("\tuae_u32 dstreg = opcode & %d;\n", dmsk);
                
                comprintf ("#endif\n");
        }
    }

    if (have_srcreg && have_dstreg &&
        (table68k[opcode].dmode==Areg || 
         table68k[opcode].dmode==Aind || 
         table68k[opcode].dmode==Aipi || 
         table68k[opcode].dmode==Apdi || 
         table68k[opcode].dmode==Ad16 || 
         table68k[opcode].dmode==Ad8r) &&
        (table68k[opcode].smode==Areg || 
         table68k[opcode].smode==Aind || 
         table68k[opcode].smode==Aipi || 
         table68k[opcode].smode==Apdi || 
         table68k[opcode].smode==Ad16 || 
         table68k[opcode].smode==Ad8r) 
        ) {
        comprintf("\tuae_u32 dodgy=(srcreg==(uae_s32)dstreg);\n");
    }
    else {
        comprintf("\tuae_u32 dodgy=0;\n");
    }
    comprintf("\tuae_u32 m68k_pc_offset_thisinst=m68k_pc_offset;\n");
    comprintf("\tm68k_pc_offset+=2;\n");

    opcode_str = get_instruction_string (opcode);

    aborted=gen_opcode (opcode);
    {
        int flags=0;
        if (global_isjump)      flags|=1;
        if (long_opcode)        flags|=2;
        if (global_cmov)        flags|=4;
        if (global_isaddx)      flags|=8;
        if (global_iscjump)     flags|=16;
        if (global_fpu)         flags|=32;
        
        comprintf ("}\n");
    
        if (aborted) {
            fprintf (stblfile, "{ NULL, 0x%08x, %ld }, /* %s */\n", flags, opcode, opcode_str);
            com_discard();
        }
        else {
            if (noflags) {
                fprintf (stblfile, "{ op_%lx_%d_comp_nf, 0x%08x, %ld }, /* %s */\n", opcode, postfix, flags, opcode, opcode_str);
                fprintf (headerfile, "extern compop_func op_%lx_%d_comp_nf;\n", opcode, postfix);
                printf ("void REGPARAM2 op_%lx_%d_comp_nf(uae_u32 opcode) /* %s */\n{\n", opcode, postfix, opcode_str);
            }
            else {
                fprintf (stblfile, "{ op_%lx_%d_comp_ff, 0x%08x, %ld }, /* %s */\n", opcode, postfix, flags, opcode, opcode_str);
                fprintf (headerfile, "extern compop_func op_%lx_%d_comp_ff;\n", opcode, postfix);
                printf ("void REGPARAM2 op_%lx_%d_comp_ff(uae_u32 opcode) /* %s */\n{\n", opcode, postfix, opcode_str);
            }
            com_flush();
        }
    }
    opcode_next_clev[rp] = next_cpu_level;
    opcode_last_postfix[rp] = postfix;
}

static void 
generate_func (int noflags)
{
    int i, j, rp;

    using_prefetch = 0;
    using_exception_3 = 0;
    for (i = 0; i < 1; i++) /* We only do one level! */
    {
        cpu_level = 4 - i;
        postfix = i;

        if (noflags)
            fprintf (stblfile, "struct comptbl op_smalltbl_%d_comp_nf[] = {\n", postfix);
        else
            fprintf (stblfile, "struct comptbl op_smalltbl_%d_comp_ff[] = {\n", postfix);


        /* sam: this is for people with low memory (eg. me :)) */
        !printf ("\n"
                 "#if !defined(PART_1) && !defined(PART_2) && "
                 "!defined(PART_3) && !defined(PART_4) && "
                 "!defined(PART_5) && !defined(PART_6) && "
                 "!defined(PART_7) && !defined(PART_8)"
                 "\n"
                 "#define PART_1 1\n"
                 "#define PART_2 1\n"
                 "#define PART_3 1\n"
                 "#define PART_4 1\n"
                 "#define PART_5 1\n"
                 "#define PART_6 1\n"
                 "#define PART_7 1\n"
                 "#define PART_8 1\n"
                 "#endif\n\n");

        rp = 0;
        for (j = 1; j <= 8; ++j)
        {
            int k = (j * nr_cpuop_funcs) / 8;
            printf ("#ifdef PART_%d\n", j);
            for (; rp < k; rp++)
                generate_one_opcode (rp,noflags);
            printf ("#endif\n\n");
        }

        fprintf (stblfile, "{ 0, 0,65536 }};\n");
    }

}

int 
main (int argc, char **argv)
{
    read_table68k ();
    do_merges ();

    opcode_map = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
    opcode_last_postfix = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
    opcode_next_clev = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
    counts = (unsigned long *) malloc (65536 * sizeof (unsigned long));
    read_counts ();

    /* It would be a lot nicer to put all in one file (we'd also get rid of
     * cputbl.h that way), but cpuopti can't cope.  That could be fixed, but
     * I don't dare to touch the 68k version.  */

    headerfile = fopen ("comptbl.h", "wb");
    stblfile = fopen ("compstbl.cpp", "wb");
    freopen ("compemu.cpp", "wb", stdout);

    generate_includes (stdout);
    generate_includes (stblfile);

    printf("#include \"compiler/compemu.h\"\n");

    noflags=0;
    generate_func (noflags);
        
        free(opcode_map);
        free(opcode_last_postfix);
        free(opcode_next_clev);
        free(counts);

    opcode_map = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
    opcode_last_postfix = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
    opcode_next_clev = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
    counts = (unsigned long *) malloc (65536 * sizeof (unsigned long));
    read_counts ();
    noflags=1;
    generate_func (noflags);

        free(opcode_map);
        free(opcode_last_postfix);
        free(opcode_next_clev);
        free(counts);

    free (table68k);
        fclose (stblfile);
        fclose (headerfile);
    fflush (stdout);
    return 0;
}
Revision:	1.11
Committed:	2007-06-29T16:32:05Z (17 years, 5 months ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
Changes since 1.10:	+9 -13 lines
Log Message:	More human readable instruction names (from e-uae).