| 1 |
/* |
| 2 |
* UAE - The Un*x Amiga Emulator |
| 3 |
* |
| 4 |
* MC68881/MC68040 emulation |
| 5 |
* |
| 6 |
* Copyright 1996 Herman ten Brugge |
| 7 |
* |
| 8 |
* |
| 9 |
* Following fixes by Lauri Pesonen, July 1999: |
| 10 |
* |
| 11 |
* FMOVEM list handling: |
| 12 |
* The lookup tables did not work correctly, rewritten. |
| 13 |
* FINT: |
| 14 |
* (int) cast does not work, fixed. |
| 15 |
* Further, now honors the FPU fpcr rounding modes. |
| 16 |
* FINTRZ: |
| 17 |
* (int) cast cannot be used, fixed. |
| 18 |
* FGETEXP: |
| 19 |
* Input argument value 0 returned erroneous value. |
| 20 |
* FMOD: |
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* (int) cast cannot be used. Replaced by proper rounding. |
| 22 |
* Quotient byte handling was missing. |
| 23 |
* FREM: |
| 24 |
* (int) cast cannot be used. Replaced by proper rounding. |
| 25 |
* Quotient byte handling was missing. |
| 26 |
* FSCALE: |
| 27 |
* Input argument value 0 was not handled correctly. |
| 28 |
* FMOVEM Control Registers to/from address FPU registers An: |
| 29 |
* A bug caused the code never been called. |
| 30 |
* FMOVEM Control Registers pre-decrement: |
| 31 |
* Moving of control regs from memory to FPP was not handled properly, |
| 32 |
* if not all of the three FPU registers were moved. |
| 33 |
* Condition code "Not Greater Than or Equal": |
| 34 |
* Returned erroneous value. |
| 35 |
* FSINCOS: |
| 36 |
* Cosine must be loaded first if same register. |
| 37 |
* FMOVECR: |
| 38 |
* Status register was not updated (yes, this affects it). |
| 39 |
* FMOVE <ea> -> reg: |
| 40 |
* Status register was not updated (yes, this affects it). |
| 41 |
* FMOVE reg -> reg: |
| 42 |
* Status register was not updated. |
| 43 |
* FDBcc: |
| 44 |
* The loop termination condition was wrong. |
| 45 |
* Possible leak from int16 to int32 fixed. |
| 46 |
* get_fp_value: |
| 47 |
* Immediate addressing mode && Operation Length == Byte -> |
| 48 |
* Use the low-order byte of the extension word. |
| 49 |
* Now FPU fpcr high 16 bits are always read as zeroes, no matter what was |
| 50 |
* written to them. |
| 51 |
* |
| 52 |
* Other: |
| 53 |
* - Optimized single/double/extended to/from conversion functions. |
| 54 |
* Huge speed boost, but not (necessarily) portable to other systems. |
| 55 |
* Enabled/disabled by #define FPU_HAVE_IEEE_DOUBLE 1 |
| 56 |
* - Optimized versions of FSCALE, FGETEXP, FGETMAN |
| 57 |
* - Conversion routines now handle NaN and infinity better. |
| 58 |
* - Some constants precalculated. Not all compilers can optimize the |
| 59 |
* expressions previously used. |
| 60 |
* |
| 61 |
* TODO: |
| 62 |
* - Floating point exceptions. |
| 63 |
* - More Infinity/NaN/overflow/underflow checking. |
| 64 |
* - FPU instruction_address (only needed when exceptions are implemented) |
| 65 |
* - Should be written in assembly to support long doubles. |
| 66 |
* - Precision rounding single/double |
| 67 |
*/ |
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|
| 69 |
#include "sysdeps.h" |
| 70 |
#include <stdio.h> |
| 71 |
#include "memory.h" |
| 72 |
#include "readcpu.h" |
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#include "newcpu.h" |
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#include "main.h" |
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#define FPU_IMPLEMENTATION |
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#include "fpu/fpu.h" |
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#include "fpu/fpu_ieee.h" |
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|
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/* Global FPU context */ |
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fpu_t fpu; |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- Scopes Definition --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#undef PUBLIC |
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#define PUBLIC /**/ |
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|
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#undef PRIVATE |
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#define PRIVATE static |
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|
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#undef FFPU |
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#define FFPU /**/ |
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|
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#undef FPU |
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#define FPU fpu. |
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|
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/* -------------------------------------------------------------------------- */ |
| 99 |
/* --- Native Support --- */ |
| 100 |
/* -------------------------------------------------------------------------- */ |
| 101 |
|
| 102 |
#include "fpu/mathlib.h" |
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#include "fpu/flags.h" |
| 104 |
#include "fpu/exceptions.h" |
| 105 |
#include "fpu/rounding.h" |
| 106 |
#include "fpu/impl.h" |
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|
| 108 |
#include "fpu/mathlib.cpp" |
| 109 |
#include "fpu/flags.cpp" |
| 110 |
#include "fpu/exceptions.cpp" |
| 111 |
#include "fpu/rounding.cpp" |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- Debugging --- */ |
| 115 |
/* -------------------------------------------------------------------------- */ |
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|
| 117 |
PUBLIC void FFPU fpu_dump_registers(void) |
| 118 |
{ |
| 119 |
for (int i = 0; i < 8; i++){ |
| 120 |
printf ("FP%d: %g ", i, fpu_get_register(i)); |
| 121 |
if ((i & 3) == 3) |
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printf ("\n"); |
| 123 |
} |
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} |
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|
| 126 |
PUBLIC void FFPU fpu_dump_flags(void) |
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{ |
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printf ("N=%d Z=%d I=%d NAN=%d\n", |
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(get_fpsr() & FPSR_CCB_NEGATIVE) != 0, |
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(get_fpsr() & FPSR_CCB_ZERO)!= 0, |
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(get_fpsr() & FPSR_CCB_INFINITY) != 0, |
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(get_fpsr() & FPSR_CCB_NAN) != 0); |
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} |
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|
| 135 |
PRIVATE void FFPU dump_registers(const char * str) |
| 136 |
{ |
| 137 |
#if FPU_DEBUG && FPU_DUMP_REGISTERS |
| 138 |
char temp_str[512]; |
| 139 |
|
| 140 |
sprintf(temp_str, "%s: %.04f, %.04f, %.04f, %.04f, %.04f, %.04f, %.04f, %.04f\n", |
| 141 |
str, |
| 142 |
fpu_get_register(0), fpu_get_register(1), fpu_get_register(2), |
| 143 |
fpu_get_register(3), fpu_get_register(4), fpu_get_register(5), |
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fpu_get_register(6), fpu_get_register(7) ); |
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|
| 146 |
fpu_debug((temp_str)); |
| 147 |
#endif |
| 148 |
} |
| 149 |
|
| 150 |
PRIVATE void FFPU dump_first_bytes(uae_u8 * buffer, uae_s32 actual) |
| 151 |
{ |
| 152 |
#if FPU_DEBUG && FPU_DUMP_FIRST_BYTES |
| 153 |
char temp_buf1[256], temp_buf2[10]; |
| 154 |
int bytes = sizeof(temp_buf1)/3-1-3; |
| 155 |
if (actual < bytes) |
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bytes = actual; |
| 157 |
|
| 158 |
temp_buf1[0] = 0; |
| 159 |
for (int i = 0; i < bytes; i++) { |
| 160 |
sprintf(temp_buf2, "%02x ", (uae_u32)buffer[i]); |
| 161 |
strcat(temp_buf1, temp_buf2); |
| 162 |
} |
| 163 |
|
| 164 |
strcat(temp_buf1, "\n"); |
| 165 |
fpu_debug((temp_buf1)); |
| 166 |
#endif |
| 167 |
} |
| 168 |
|
| 169 |
// Quotient Byte is loaded with the sign and least significant |
| 170 |
// seven bits of the quotient. |
| 171 |
PRIVATE inline void FFPU make_quotient(fpu_register const & quotient, uae_u32 sign) |
| 172 |
{ |
| 173 |
uae_u32 lsb = (uae_u32)fp_fabs(quotient) & 0x7f; |
| 174 |
FPU fpsr.quotient = sign | (lsb << 16); |
| 175 |
} |
| 176 |
|
| 177 |
// to_single |
| 178 |
PRIVATE inline fpu_register FFPU make_single(uae_u32 value) |
| 179 |
{ |
| 180 |
#if 1 |
| 181 |
// Use a single, otherwise some checks for NaN, Inf, Zero would have to |
| 182 |
// be performed |
| 183 |
fpu_single result; |
| 184 |
fp_declare_init_shape(srp, result, single); |
| 185 |
srp->ieee.negative = (value >> 31) & 1; |
| 186 |
srp->ieee.exponent = (value >> 23) & FP_SINGLE_EXP_MAX; |
| 187 |
srp->ieee.mantissa = value & 0x007fffff; |
| 188 |
fpu_debug(("make_single (%X) = %.04f\n",value,(double)result)); |
| 189 |
return result; |
| 190 |
#elif 0 /* Original code */ |
| 191 |
if ((value & 0x7fffffff) == 0) |
| 192 |
return (0.0); |
| 193 |
|
| 194 |
fpu_register result; |
| 195 |
uae_u32 * p = (uae_u32 *)&result; |
| 196 |
|
| 197 |
uae_u32 sign = (value & 0x80000000); |
| 198 |
uae_u32 exp = ((value & 0x7F800000) >> 23) + 1023 - 127; |
| 199 |
|
| 200 |
p[FLO] = value << 29; |
| 201 |
p[FHI] = sign | (exp << 20) | ((value & 0x007FFFFF) >> 3); |
| 202 |
|
| 203 |
fpu_debug(("make_single (%X) = %.04f\n",value,(double)result)); |
| 204 |
|
| 205 |
return(result); |
| 206 |
#endif |
| 207 |
} |
| 208 |
|
| 209 |
// from_single |
| 210 |
PRIVATE inline uae_u32 FFPU extract_single(fpu_register const & src) |
| 211 |
{ |
| 212 |
#if 1 |
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fpu_single input = (fpu_single) src; |
| 214 |
fp_declare_init_shape(sip, input, single); |
| 215 |
uae_u32 result = (sip->ieee.negative << 31) |
| 216 |
| (sip->ieee.exponent << 23) |
| 217 |
| sip->ieee.mantissa; |
| 218 |
fpu_debug(("extract_single (%.04f) = %X\n",(double)src,result)); |
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return result; |
| 220 |
#elif 0 /* Original code */ |
| 221 |
if (src == 0.0) |
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return 0; |
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|
| 224 |
uae_u32 result; |
| 225 |
uae_u32 *p = (uae_u32 *)&src; |
| 226 |
|
| 227 |
uae_u32 sign = (p[FHI] & 0x80000000); |
| 228 |
uae_u32 exp = (p[FHI] & 0x7FF00000) >> 20; |
| 229 |
|
| 230 |
if(exp + 127 < 1023) { |
| 231 |
exp = 0; |
| 232 |
} else if(exp > 1023 + 127) { |
| 233 |
exp = 255; |
| 234 |
} else { |
| 235 |
exp = exp + 127 - 1023; |
| 236 |
} |
| 237 |
|
| 238 |
result = sign | (exp << 23) | ((p[FHI] & 0x000FFFFF) << 3) | (p[FLO] >> 29); |
| 239 |
|
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fpu_debug(("extract_single (%.04f) = %X\n",(double)src,result)); |
| 241 |
|
| 242 |
return (result); |
| 243 |
#endif |
| 244 |
} |
| 245 |
|
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// to_exten |
| 247 |
PRIVATE inline fpu_register FFPU make_extended(uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3) |
| 248 |
{ |
| 249 |
// is it zero? |
| 250 |
if ((wrd1 & 0x7fff0000) == 0 && wrd2 == 0 && wrd3 == 0) |
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return 0.0; |
| 252 |
|
| 253 |
fpu_register result; |
| 254 |
#ifndef USE_LONG_DOUBLE |
| 255 |
uae_u32 sgn = (wrd1 >> 31) & 1; |
| 256 |
uae_u32 exp = (wrd1 >> 16) & 0x7fff; |
| 257 |
|
| 258 |
// the explicit integer bit is not set, must normalize |
| 259 |
if ((wrd2 & 0x80000000) == 0) { |
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fpu_debug(("make_extended denormalized mantissa (%X,%X,%X)\n",wrd1,wrd2,wrd3)); |
| 261 |
if (wrd2 | wrd3) { |
| 262 |
// mantissa, not fraction. |
| 263 |
uae_u64 man = ((uae_u64)wrd2 << 32) | wrd3; |
| 264 |
while (exp > 0 && (man & UVAL64(0x8000000000000000)) == 0) { |
| 265 |
man <<= 1; |
| 266 |
exp--; |
| 267 |
} |
| 268 |
wrd2 = (uae_u32)(man >> 32); |
| 269 |
wrd3 = (uae_u32)(man & 0xFFFFFFFF); |
| 270 |
} |
| 271 |
else if (exp != 0x7fff) // zero |
| 272 |
exp = FP_EXTENDED_EXP_BIAS - FP_DOUBLE_EXP_BIAS; |
| 273 |
} |
| 274 |
|
| 275 |
if (exp < FP_EXTENDED_EXP_BIAS - FP_DOUBLE_EXP_BIAS) |
| 276 |
exp = 0; |
| 277 |
else if (exp > FP_EXTENDED_EXP_BIAS + FP_DOUBLE_EXP_BIAS) |
| 278 |
exp = FP_DOUBLE_EXP_MAX; |
| 279 |
else |
| 280 |
exp += FP_DOUBLE_EXP_BIAS - FP_EXTENDED_EXP_BIAS; |
| 281 |
|
| 282 |
fp_declare_init_shape(srp, result, double); |
| 283 |
srp->ieee.negative = sgn; |
| 284 |
srp->ieee.exponent = exp; |
| 285 |
// drop the explicit integer bit |
| 286 |
srp->ieee.mantissa0 = (wrd2 & 0x7fffffff) >> 11; |
| 287 |
srp->ieee.mantissa1 = (wrd2 << 21) | (wrd3 >> 11); |
| 288 |
#elif USE_QUAD_DOUBLE |
| 289 |
fp_declare_init_shape(srp, result, extended); |
| 290 |
srp->ieee.negative = (wrd1 >> 31) & 1; |
| 291 |
srp->ieee.exponent = (wrd1 >> 16) & FP_EXTENDED_EXP_MAX; |
| 292 |
srp->ieee.mantissa0 = (wrd2 >> 16) & 0xffff; |
| 293 |
srp->ieee.mantissa1 = ((wrd2 & 0xffff) << 16) | ((wrd3 >> 16) & 0xffff); |
| 294 |
srp->ieee.mantissa2 = (wrd3 & 0xffff) << 16; |
| 295 |
#else |
| 296 |
fp_declare_init_shape(srp, result, extended); |
| 297 |
srp->ieee.negative = (wrd1 >> 31) & 1; |
| 298 |
srp->ieee.exponent = (wrd1 >> 16) & FP_EXTENDED_EXP_MAX; |
| 299 |
srp->ieee.mantissa0 = wrd2; |
| 300 |
srp->ieee.mantissa1 = wrd3; |
| 301 |
#endif |
| 302 |
fpu_debug(("make_extended (%X,%X,%X) = %.04f\n",wrd1,wrd2,wrd3,(double)result)); |
| 303 |
return result; |
| 304 |
} |
| 305 |
|
| 306 |
/* |
| 307 |
Would be so much easier with full size floats :( |
| 308 |
... this is so vague. |
| 309 |
*/ |
| 310 |
// make_extended_no_normalize |
| 311 |
PRIVATE inline void FFPU make_extended_no_normalize( |
| 312 |
uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3, fpu_register & result |
| 313 |
) |
| 314 |
{ |
| 315 |
// is it zero? |
| 316 |
if ((wrd1 && 0x7fff0000) == 0 && wrd2 == 0 && wrd3 == 0) { |
| 317 |
make_zero_positive(result); |
| 318 |
return; |
| 319 |
} |
| 320 |
// is it NaN? |
| 321 |
if ((wrd1 & 0x7fff0000) == 0x7fff0000 && wrd2 != 0 && wrd3 != 0) { |
| 322 |
make_nan(result); |
| 323 |
return; |
| 324 |
} |
| 325 |
#ifndef USE_LONG_DOUBLE |
| 326 |
uae_u32 exp = (wrd1 >> 16) & 0x7fff; |
| 327 |
if (exp < FP_EXTENDED_EXP_BIAS - FP_DOUBLE_EXP_BIAS) |
| 328 |
exp = 0; |
| 329 |
else if (exp > FP_EXTENDED_EXP_BIAS + FP_DOUBLE_EXP_BIAS) |
| 330 |
exp = FP_DOUBLE_EXP_MAX; |
| 331 |
else |
| 332 |
exp += FP_DOUBLE_EXP_BIAS - FP_EXTENDED_EXP_BIAS; |
| 333 |
|
| 334 |
fp_declare_init_shape(srp, result, double); |
| 335 |
srp->ieee.negative = (wrd1 >> 31) & 1; |
| 336 |
srp->ieee.exponent = exp; |
| 337 |
// drop the explicit integer bit |
| 338 |
srp->ieee.mantissa0 = (wrd2 & 0x7fffffff) >> 11; |
| 339 |
srp->ieee.mantissa1 = (wrd2 << 21) | (wrd3 >> 11); |
| 340 |
#else |
| 341 |
// FIXME: USE_QUAD_DOUBLE |
| 342 |
fp_declare_init_shape(srp, result, extended); |
| 343 |
srp->ieee.negative = (wrd1 & 0x80000000) != 0; |
| 344 |
srp->ieee.exponent = (wrd1 >> 16) & 0x7fff; |
| 345 |
srp->ieee.mantissa0 = wrd2; |
| 346 |
srp->ieee.mantissa1 = wrd3; |
| 347 |
#endif |
| 348 |
fpu_debug(("make_extended (%X,%X,%X) = %.04f\n",wrd1,wrd2,wrd3,(double)result)); |
| 349 |
} |
| 350 |
|
| 351 |
// from_exten |
| 352 |
PRIVATE inline void FFPU extract_extended(fpu_register const & src, |
| 353 |
uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3 |
| 354 |
) |
| 355 |
{ |
| 356 |
if (src == 0.0) { |
| 357 |
*wrd1 = *wrd2 = *wrd3 = 0; |
| 358 |
return; |
| 359 |
} |
| 360 |
#ifndef USE_LONG_DOUBLE |
| 361 |
fp_declare_init_shape(srp, src, double); |
| 362 |
fpu_debug(("extract_extended (%d,%d,%X,%X)\n", |
| 363 |
srp->ieee.negative , srp->ieee.exponent, |
| 364 |
srp->ieee.mantissa0, srp->ieee.mantissa1)); |
| 365 |
|
| 366 |
uae_u32 exp = srp->ieee.exponent; |
| 367 |
|
| 368 |
if (exp == FP_DOUBLE_EXP_MAX) |
| 369 |
exp = FP_EXTENDED_EXP_MAX; |
| 370 |
else |
| 371 |
exp += FP_EXTENDED_EXP_BIAS - FP_DOUBLE_EXP_BIAS; |
| 372 |
|
| 373 |
*wrd1 = (srp->ieee.negative << 31) | (exp << 16); |
| 374 |
// always set the explicit integer bit. |
| 375 |
*wrd2 = 0x80000000 | (srp->ieee.mantissa0 << 11) | ((srp->ieee.mantissa1 & 0xffe00000) >> 21); |
| 376 |
*wrd3 = srp->ieee.mantissa1 << 11; |
| 377 |
#else |
| 378 |
// FIXME: USE_QUAD_DOUBLE |
| 379 |
uae_u32 *p = (uae_u32 *)&src; |
| 380 |
#ifdef WORDS_BIGENDIAN |
| 381 |
*wrd1 = p[0]; |
| 382 |
*wrd2 = p[1]; |
| 383 |
*wrd3 = p[2]; |
| 384 |
#else |
| 385 |
*wrd3 = p[0]; |
| 386 |
*wrd2 = p[1]; |
| 387 |
*wrd1 = ( (uae_u32)*((uae_u16 *)&p[2]) ) << 16; |
| 388 |
#endif |
| 389 |
#endif |
| 390 |
fpu_debug(("extract_extended (%.04f) = %X,%X,%X\n",(double)src,*wrd1,*wrd2,*wrd3)); |
| 391 |
} |
| 392 |
|
| 393 |
// to_double |
| 394 |
PRIVATE inline fpu_register FFPU make_double(uae_u32 wrd1, uae_u32 wrd2) |
| 395 |
{ |
| 396 |
union { |
| 397 |
fpu_double value; |
| 398 |
uae_u32 parts[2]; |
| 399 |
} dest; |
| 400 |
#ifdef WORDS_BIGENDIAN |
| 401 |
dest.parts[0] = wrd1; |
| 402 |
dest.parts[1] = wrd2; |
| 403 |
#else |
| 404 |
dest.parts[0] = wrd2; |
| 405 |
dest.parts[1] = wrd1; |
| 406 |
#endif |
| 407 |
fpu_debug(("make_double (%X,%X) = %.04f\n",wrd1,wrd2,dest.value)); |
| 408 |
return (fpu_register)(dest.value); |
| 409 |
} |
| 410 |
|
| 411 |
// from_double |
| 412 |
PRIVATE inline void FFPU extract_double(fpu_register const & src, |
| 413 |
uae_u32 * wrd1, uae_u32 * wrd2 |
| 414 |
) |
| 415 |
{ |
| 416 |
union { |
| 417 |
fpu_double value; |
| 418 |
uae_u32 parts[2]; |
| 419 |
} dest; |
| 420 |
dest.value = (fpu_double)src; |
| 421 |
#ifdef WORDS_BIGENDIAN |
| 422 |
*wrd1 = dest.parts[0]; |
| 423 |
*wrd2 = dest.parts[1]; |
| 424 |
#else |
| 425 |
*wrd2 = dest.parts[0]; |
| 426 |
*wrd1 = dest.parts[1]; |
| 427 |
#endif |
| 428 |
fpu_debug(("extract_double (%.04f) = %X,%X\n",(double)src,*wrd1,*wrd2)); |
| 429 |
} |
| 430 |
|
| 431 |
// to_pack |
| 432 |
PRIVATE inline fpu_register FFPU make_packed(uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3) |
| 433 |
{ |
| 434 |
fpu_double d; |
| 435 |
char *cp; |
| 436 |
char str[100]; |
| 437 |
|
| 438 |
cp = str; |
| 439 |
if (wrd1 & 0x80000000) |
| 440 |
*cp++ = '-'; |
| 441 |
*cp++ = (char)((wrd1 & 0xf) + '0'); |
| 442 |
*cp++ = '.'; |
| 443 |
*cp++ = (char)(((wrd2 >> 28) & 0xf) + '0'); |
| 444 |
*cp++ = (char)(((wrd2 >> 24) & 0xf) + '0'); |
| 445 |
*cp++ = (char)(((wrd2 >> 20) & 0xf) + '0'); |
| 446 |
*cp++ = (char)(((wrd2 >> 16) & 0xf) + '0'); |
| 447 |
*cp++ = (char)(((wrd2 >> 12) & 0xf) + '0'); |
| 448 |
*cp++ = (char)(((wrd2 >> 8) & 0xf) + '0'); |
| 449 |
*cp++ = (char)(((wrd2 >> 4) & 0xf) + '0'); |
| 450 |
*cp++ = (char)(((wrd2 >> 0) & 0xf) + '0'); |
| 451 |
*cp++ = (char)(((wrd3 >> 28) & 0xf) + '0'); |
| 452 |
*cp++ = (char)(((wrd3 >> 24) & 0xf) + '0'); |
| 453 |
*cp++ = (char)(((wrd3 >> 20) & 0xf) + '0'); |
| 454 |
*cp++ = (char)(((wrd3 >> 16) & 0xf) + '0'); |
| 455 |
*cp++ = (char)(((wrd3 >> 12) & 0xf) + '0'); |
| 456 |
*cp++ = (char)(((wrd3 >> 8) & 0xf) + '0'); |
| 457 |
*cp++ = (char)(((wrd3 >> 4) & 0xf) + '0'); |
| 458 |
*cp++ = (char)(((wrd3 >> 0) & 0xf) + '0'); |
| 459 |
*cp++ = 'E'; |
| 460 |
if (wrd1 & 0x40000000) |
| 461 |
*cp++ = '-'; |
| 462 |
*cp++ = (char)(((wrd1 >> 24) & 0xf) + '0'); |
| 463 |
*cp++ = (char)(((wrd1 >> 20) & 0xf) + '0'); |
| 464 |
*cp++ = (char)(((wrd1 >> 16) & 0xf) + '0'); |
| 465 |
*cp = 0; |
| 466 |
sscanf(str, "%le", &d); |
| 467 |
|
| 468 |
fpu_debug(("make_packed str = %s\n",str)); |
| 469 |
|
| 470 |
fpu_debug(("make_packed(%X,%X,%X) = %.04f\n",wrd1,wrd2,wrd3,(double)d)); |
| 471 |
return d; |
| 472 |
} |
| 473 |
|
| 474 |
// from_pack |
| 475 |
PRIVATE inline void FFPU extract_packed(fpu_register const & src, uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3) |
| 476 |
{ |
| 477 |
int i; |
| 478 |
int t; |
| 479 |
char *cp; |
| 480 |
char str[100]; |
| 481 |
|
| 482 |
sprintf(str, "%.16e", src); |
| 483 |
|
| 484 |
fpu_debug(("extract_packed(%.04f,%s)\n",(double)src,str)); |
| 485 |
|
| 486 |
cp = str; |
| 487 |
*wrd1 = *wrd2 = *wrd3 = 0; |
| 488 |
if (*cp == '-') { |
| 489 |
cp++; |
| 490 |
*wrd1 = 0x80000000; |
| 491 |
} |
| 492 |
if (*cp == '+') |
| 493 |
cp++; |
| 494 |
*wrd1 |= (*cp++ - '0'); |
| 495 |
if (*cp == '.') |
| 496 |
cp++; |
| 497 |
for (i = 0; i < 8; i++) { |
| 498 |
*wrd2 <<= 4; |
| 499 |
if (*cp >= '0' && *cp <= '9') |
| 500 |
*wrd2 |= *cp++ - '0'; |
| 501 |
} |
| 502 |
for (i = 0; i < 8; i++) { |
| 503 |
*wrd3 <<= 4; |
| 504 |
if (*cp >= '0' && *cp <= '9') |
| 505 |
*wrd3 |= *cp++ - '0'; |
| 506 |
} |
| 507 |
if (*cp == 'e' || *cp == 'E') { |
| 508 |
cp++; |
| 509 |
if (*cp == '-') { |
| 510 |
cp++; |
| 511 |
*wrd1 |= 0x40000000; |
| 512 |
} |
| 513 |
if (*cp == '+') |
| 514 |
cp++; |
| 515 |
t = 0; |
| 516 |
for (i = 0; i < 3; i++) { |
| 517 |
if (*cp >= '0' && *cp <= '9') |
| 518 |
t = (t << 4) | (*cp++ - '0'); |
| 519 |
} |
| 520 |
*wrd1 |= t << 16; |
| 521 |
} |
| 522 |
|
| 523 |
fpu_debug(("extract_packed(%.04f) = %X,%X,%X\n",(double)src,*wrd1,*wrd2,*wrd3)); |
| 524 |
} |
| 525 |
|
| 526 |
PRIVATE inline int FFPU get_fp_value (uae_u32 opcode, uae_u16 extra, fpu_register & src) |
| 527 |
{ |
| 528 |
uaecptr tmppc; |
| 529 |
uae_u16 tmp; |
| 530 |
int size; |
| 531 |
int mode; |
| 532 |
int reg; |
| 533 |
uae_u32 ad = 0; |
| 534 |
static int sz1[8] = {4, 4, 12, 12, 2, 8, 1, 0}; |
| 535 |
static int sz2[8] = {4, 4, 12, 12, 2, 8, 2, 0}; |
| 536 |
|
| 537 |
// fpu_debug(("get_fp_value(%X,%X)\n",(int)opcode,(int)extra)); |
| 538 |
// dump_first_bytes( regs.pc_p-4, 16 ); |
| 539 |
|
| 540 |
if ((extra & 0x4000) == 0) { |
| 541 |
src = FPU registers[(extra >> 10) & 7]; |
| 542 |
return 1; |
| 543 |
} |
| 544 |
mode = (opcode >> 3) & 7; |
| 545 |
reg = opcode & 7; |
| 546 |
size = (extra >> 10) & 7; |
| 547 |
|
| 548 |
fpu_debug(("get_fp_value mode=%d, reg=%d, size=%d\n",(int)mode,(int)reg,(int)size)); |
| 549 |
|
| 550 |
switch (mode) { |
| 551 |
case 0: |
| 552 |
switch (size) { |
| 553 |
case 6: |
| 554 |
src = (fpu_register) (uae_s8) m68k_dreg (regs, reg); |
| 555 |
break; |
| 556 |
case 4: |
| 557 |
src = (fpu_register) (uae_s16) m68k_dreg (regs, reg); |
| 558 |
break; |
| 559 |
case 0: |
| 560 |
src = (fpu_register) (uae_s32) m68k_dreg (regs, reg); |
| 561 |
break; |
| 562 |
case 1: |
| 563 |
src = make_single(m68k_dreg (regs, reg)); |
| 564 |
break; |
| 565 |
default: |
| 566 |
return 0; |
| 567 |
} |
| 568 |
return 1; |
| 569 |
case 1: |
| 570 |
return 0; |
| 571 |
case 2: |
| 572 |
ad = m68k_areg (regs, reg); |
| 573 |
break; |
| 574 |
case 3: |
| 575 |
ad = m68k_areg (regs, reg); |
| 576 |
m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size]; |
| 577 |
break; |
| 578 |
case 4: |
| 579 |
m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size]; |
| 580 |
ad = m68k_areg (regs, reg); |
| 581 |
break; |
| 582 |
case 5: |
| 583 |
ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword(); |
| 584 |
break; |
| 585 |
case 6: |
| 586 |
ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword()); |
| 587 |
break; |
| 588 |
case 7: |
| 589 |
switch (reg) { |
| 590 |
case 0: |
| 591 |
ad = (uae_s32) (uae_s16) next_iword(); |
| 592 |
break; |
| 593 |
case 1: |
| 594 |
ad = next_ilong(); |
| 595 |
break; |
| 596 |
case 2: |
| 597 |
ad = m68k_getpc (); |
| 598 |
ad += (uae_s32) (uae_s16) next_iword(); |
| 599 |
fpu_debug(("get_fp_value next_iword()=%X\n",ad-m68k_getpc()-2)); |
| 600 |
break; |
| 601 |
case 3: |
| 602 |
tmppc = m68k_getpc (); |
| 603 |
tmp = (uae_u16)next_iword(); |
| 604 |
ad = get_disp_ea_020 (tmppc, tmp); |
| 605 |
break; |
| 606 |
case 4: |
| 607 |
ad = m68k_getpc (); |
| 608 |
m68k_setpc (ad + sz2[size]); |
| 609 |
// Immediate addressing mode && Operation Length == Byte -> |
| 610 |
// Use the low-order byte of the extension word. |
| 611 |
if(size == 6) ad++; |
| 612 |
break; |
| 613 |
default: |
| 614 |
return 0; |
| 615 |
} |
| 616 |
} |
| 617 |
|
| 618 |
fpu_debug(("get_fp_value m68k_getpc()=%X\n",m68k_getpc())); |
| 619 |
fpu_debug(("get_fp_value ad=%X\n",ad)); |
| 620 |
fpu_debug(("get_fp_value get_long (ad)=%X\n",get_long (ad))); |
| 621 |
dump_first_bytes( get_real_address(ad)-64, 64 ); |
| 622 |
dump_first_bytes( get_real_address(ad), 64 ); |
| 623 |
|
| 624 |
switch (size) { |
| 625 |
case 0: |
| 626 |
src = (fpu_register) (uae_s32) get_long (ad); |
| 627 |
break; |
| 628 |
case 1: |
| 629 |
src = make_single(get_long (ad)); |
| 630 |
break; |
| 631 |
case 2: { |
| 632 |
uae_u32 wrd1, wrd2, wrd3; |
| 633 |
wrd1 = get_long (ad); |
| 634 |
ad += 4; |
| 635 |
wrd2 = get_long (ad); |
| 636 |
ad += 4; |
| 637 |
wrd3 = get_long (ad); |
| 638 |
src = make_extended(wrd1, wrd2, wrd3); |
| 639 |
break; |
| 640 |
} |
| 641 |
case 3: { |
| 642 |
uae_u32 wrd1, wrd2, wrd3; |
| 643 |
wrd1 = get_long (ad); |
| 644 |
ad += 4; |
| 645 |
wrd2 = get_long (ad); |
| 646 |
ad += 4; |
| 647 |
wrd3 = get_long (ad); |
| 648 |
src = make_packed(wrd1, wrd2, wrd3); |
| 649 |
break; |
| 650 |
} |
| 651 |
case 4: |
| 652 |
src = (fpu_register) (uae_s16) get_word(ad); |
| 653 |
break; |
| 654 |
case 5: { |
| 655 |
uae_u32 wrd1, wrd2; |
| 656 |
wrd1 = get_long (ad); |
| 657 |
ad += 4; |
| 658 |
wrd2 = get_long (ad); |
| 659 |
src = make_double(wrd1, wrd2); |
| 660 |
break; |
| 661 |
} |
| 662 |
case 6: |
| 663 |
src = (fpu_register) (uae_s8) get_byte(ad); |
| 664 |
break; |
| 665 |
default: |
| 666 |
return 0; |
| 667 |
} |
| 668 |
|
| 669 |
// fpu_debug(("get_fp_value result = %.04f\n",(float)src)); |
| 670 |
return 1; |
| 671 |
} |
| 672 |
|
| 673 |
/* Convert the FP value to integer according to the current m68k rounding mode */ |
| 674 |
PRIVATE inline uae_s32 FFPU toint(fpu_register const & src) |
| 675 |
{ |
| 676 |
fpu_register result; |
| 677 |
switch (get_fpcr() & 0x30) { |
| 678 |
case FPCR_ROUND_ZERO: |
| 679 |
result = fp_round_to_zero(src); |
| 680 |
break; |
| 681 |
case FPCR_ROUND_MINF: |
| 682 |
result = fp_round_to_minus_infinity(src); |
| 683 |
break; |
| 684 |
case FPCR_ROUND_NEAR: |
| 685 |
result = fp_round_to_nearest(src); |
| 686 |
break; |
| 687 |
case FPCR_ROUND_PINF: |
| 688 |
result = fp_round_to_plus_infinity(src); |
| 689 |
break; |
| 690 |
default: |
| 691 |
result = src; /* should never be reached */ |
| 692 |
break; |
| 693 |
} |
| 694 |
return (uae_s32)result; |
| 695 |
} |
| 696 |
|
| 697 |
PRIVATE inline int FFPU put_fp_value (uae_u32 opcode, uae_u16 extra, fpu_register const & value) |
| 698 |
{ |
| 699 |
uae_u16 tmp; |
| 700 |
uaecptr tmppc; |
| 701 |
int size; |
| 702 |
int mode; |
| 703 |
int reg; |
| 704 |
uae_u32 ad; |
| 705 |
static int sz1[8] = {4, 4, 12, 12, 2, 8, 1, 0}; |
| 706 |
static int sz2[8] = {4, 4, 12, 12, 2, 8, 2, 0}; |
| 707 |
|
| 708 |
// fpu_debug(("put_fp_value(%.04f,%X,%X)\n",(float)value,(int)opcode,(int)extra)); |
| 709 |
|
| 710 |
if ((extra & 0x4000) == 0) { |
| 711 |
int dest_reg = (extra >> 10) & 7; |
| 712 |
FPU registers[dest_reg] = value; |
| 713 |
make_fpsr(FPU registers[dest_reg]); |
| 714 |
return 1; |
| 715 |
} |
| 716 |
mode = (opcode >> 3) & 7; |
| 717 |
reg = opcode & 7; |
| 718 |
size = (extra >> 10) & 7; |
| 719 |
ad = 0xffffffff; |
| 720 |
switch (mode) { |
| 721 |
case 0: |
| 722 |
switch (size) { |
| 723 |
case 6: |
| 724 |
m68k_dreg (regs, reg) = ((toint(value) & 0xff) |
| 725 |
| (m68k_dreg (regs, reg) & ~0xff)); |
| 726 |
break; |
| 727 |
case 4: |
| 728 |
m68k_dreg (regs, reg) = ((toint(value) & 0xffff) |
| 729 |
| (m68k_dreg (regs, reg) & ~0xffff)); |
| 730 |
break; |
| 731 |
case 0: |
| 732 |
m68k_dreg (regs, reg) = toint(value); |
| 733 |
break; |
| 734 |
case 1: |
| 735 |
m68k_dreg (regs, reg) = extract_single(value); |
| 736 |
break; |
| 737 |
default: |
| 738 |
return 0; |
| 739 |
} |
| 740 |
return 1; |
| 741 |
case 1: |
| 742 |
return 0; |
| 743 |
case 2: |
| 744 |
ad = m68k_areg (regs, reg); |
| 745 |
break; |
| 746 |
case 3: |
| 747 |
ad = m68k_areg (regs, reg); |
| 748 |
m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size]; |
| 749 |
break; |
| 750 |
case 4: |
| 751 |
m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size]; |
| 752 |
ad = m68k_areg (regs, reg); |
| 753 |
break; |
| 754 |
case 5: |
| 755 |
ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword(); |
| 756 |
break; |
| 757 |
case 6: |
| 758 |
ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword()); |
| 759 |
break; |
| 760 |
case 7: |
| 761 |
switch (reg) { |
| 762 |
case 0: |
| 763 |
ad = (uae_s32) (uae_s16) next_iword(); |
| 764 |
break; |
| 765 |
case 1: |
| 766 |
ad = next_ilong(); |
| 767 |
break; |
| 768 |
case 2: |
| 769 |
ad = m68k_getpc (); |
| 770 |
ad += (uae_s32) (uae_s16) next_iword(); |
| 771 |
break; |
| 772 |
case 3: |
| 773 |
tmppc = m68k_getpc (); |
| 774 |
tmp = (uae_u16)next_iword(); |
| 775 |
ad = get_disp_ea_020 (tmppc, tmp); |
| 776 |
break; |
| 777 |
case 4: |
| 778 |
ad = m68k_getpc (); |
| 779 |
m68k_setpc (ad + sz2[size]); |
| 780 |
break; |
| 781 |
default: |
| 782 |
return 0; |
| 783 |
} |
| 784 |
} |
| 785 |
switch (size) { |
| 786 |
case 0: |
| 787 |
put_long (ad, toint(value)); |
| 788 |
break; |
| 789 |
case 1: |
| 790 |
put_long (ad, extract_single(value)); |
| 791 |
break; |
| 792 |
case 2: { |
| 793 |
uae_u32 wrd1, wrd2, wrd3; |
| 794 |
extract_extended(value, &wrd1, &wrd2, &wrd3); |
| 795 |
put_long (ad, wrd1); |
| 796 |
ad += 4; |
| 797 |
put_long (ad, wrd2); |
| 798 |
ad += 4; |
| 799 |
put_long (ad, wrd3); |
| 800 |
break; |
| 801 |
} |
| 802 |
case 3: { |
| 803 |
uae_u32 wrd1, wrd2, wrd3; |
| 804 |
extract_packed(value, &wrd1, &wrd2, &wrd3); |
| 805 |
put_long (ad, wrd1); |
| 806 |
ad += 4; |
| 807 |
put_long (ad, wrd2); |
| 808 |
ad += 4; |
| 809 |
put_long (ad, wrd3); |
| 810 |
break; |
| 811 |
} |
| 812 |
case 4: |
| 813 |
put_word(ad, (uae_s16) toint(value)); |
| 814 |
break; |
| 815 |
case 5: { |
| 816 |
uae_u32 wrd1, wrd2; |
| 817 |
extract_double(value, &wrd1, &wrd2); |
| 818 |
put_long (ad, wrd1); |
| 819 |
ad += 4; |
| 820 |
put_long (ad, wrd2); |
| 821 |
break; |
| 822 |
} |
| 823 |
case 6: |
| 824 |
put_byte(ad, (uae_s8) toint(value)); |
| 825 |
break; |
| 826 |
default: |
| 827 |
return 0; |
| 828 |
} |
| 829 |
return 1; |
| 830 |
} |
| 831 |
|
| 832 |
PRIVATE inline int FFPU get_fp_ad(uae_u32 opcode, uae_u32 * ad) |
| 833 |
{ |
| 834 |
uae_u16 tmp; |
| 835 |
uaecptr tmppc; |
| 836 |
int mode; |
| 837 |
int reg; |
| 838 |
|
| 839 |
mode = (opcode >> 3) & 7; |
| 840 |
reg = opcode & 7; |
| 841 |
switch (mode) { |
| 842 |
case 0: |
| 843 |
case 1: |
| 844 |
return 0; |
| 845 |
case 2: |
| 846 |
*ad = m68k_areg (regs, reg); |
| 847 |
break; |
| 848 |
case 3: |
| 849 |
*ad = m68k_areg (regs, reg); |
| 850 |
break; |
| 851 |
case 4: |
| 852 |
*ad = m68k_areg (regs, reg); |
| 853 |
break; |
| 854 |
case 5: |
| 855 |
*ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword(); |
| 856 |
break; |
| 857 |
case 6: |
| 858 |
*ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword()); |
| 859 |
break; |
| 860 |
case 7: |
| 861 |
switch (reg) { |
| 862 |
case 0: |
| 863 |
*ad = (uae_s32) (uae_s16) next_iword(); |
| 864 |
break; |
| 865 |
case 1: |
| 866 |
*ad = next_ilong(); |
| 867 |
break; |
| 868 |
case 2: |
| 869 |
*ad = m68k_getpc (); |
| 870 |
*ad += (uae_s32) (uae_s16) next_iword(); |
| 871 |
break; |
| 872 |
case 3: |
| 873 |
tmppc = m68k_getpc (); |
| 874 |
tmp = (uae_u16)next_iword(); |
| 875 |
*ad = get_disp_ea_020 (tmppc, tmp); |
| 876 |
break; |
| 877 |
default: |
| 878 |
return 0; |
| 879 |
} |
| 880 |
} |
| 881 |
return 1; |
| 882 |
} |
| 883 |
|
| 884 |
#if FPU_DEBUG |
| 885 |
# define CONDRET(s,x) fpu_debug(("fpp_cond %s = %d\n",s,(uint32)(x))); return (x) |
| 886 |
#else |
| 887 |
# define CONDRET(s,x) return (x) |
| 888 |
#endif |
| 889 |
|
| 890 |
PRIVATE inline int FFPU fpp_cond(int condition) |
| 891 |
{ |
| 892 |
int N = (FPU result < 0.0); |
| 893 |
int Z = (FPU result == 0.0); |
| 894 |
int NaN = isnan(FPU result); |
| 895 |
|
| 896 |
if (NaN) |
| 897 |
N = Z = 0; |
| 898 |
|
| 899 |
switch (condition) { |
| 900 |
case 0x00: CONDRET("False",0); |
| 901 |
case 0x01: CONDRET("Equal",Z); |
| 902 |
case 0x02: CONDRET("Ordered Greater Than",!(NaN || Z || N)); |
| 903 |
case 0x03: CONDRET("Ordered Greater Than or Equal",Z || !(NaN || N)); |
| 904 |
case 0x04: CONDRET("Ordered Less Than",N && !(NaN || Z)); |
| 905 |
case 0x05: CONDRET("Ordered Less Than or Equal",Z || (N && !NaN)); |
| 906 |
case 0x06: CONDRET("Ordered Greater or Less Than",!(NaN || Z)); |
| 907 |
case 0x07: CONDRET("Ordered",!NaN); |
| 908 |
case 0x08: CONDRET("Unordered",NaN); |
| 909 |
case 0x09: CONDRET("Unordered or Equal",NaN || Z); |
| 910 |
case 0x0a: CONDRET("Unordered or Greater Than",NaN || !(N || Z)); |
| 911 |
case 0x0b: CONDRET("Unordered or Greater or Equal",NaN || Z || !N); |
| 912 |
case 0x0c: CONDRET("Unordered or Less Than",NaN || (N && !Z)); |
| 913 |
case 0x0d: CONDRET("Unordered or Less or Equal",NaN || Z || N); |
| 914 |
case 0x0e: CONDRET("Not Equal",!Z); |
| 915 |
case 0x0f: CONDRET("True",1); |
| 916 |
case 0x10: CONDRET("Signaling False",0); |
| 917 |
case 0x11: CONDRET("Signaling Equal",Z); |
| 918 |
case 0x12: CONDRET("Greater Than",!(NaN || Z || N)); |
| 919 |
case 0x13: CONDRET("Greater Than or Equal",Z || !(NaN || N)); |
| 920 |
case 0x14: CONDRET("Less Than",N && !(NaN || Z)); |
| 921 |
case 0x15: CONDRET("Less Than or Equal",Z || (N && !NaN)); |
| 922 |
case 0x16: CONDRET("Greater or Less Than",!(NaN || Z)); |
| 923 |
case 0x17: CONDRET("Greater, Less or Equal",!NaN); |
| 924 |
case 0x18: CONDRET("Not Greater, Less or Equal",NaN); |
| 925 |
case 0x19: CONDRET("Not Greater or Less Than",NaN || Z); |
| 926 |
case 0x1a: CONDRET("Not Less Than or Equal",NaN || !(N || Z)); |
| 927 |
case 0x1b: CONDRET("Not Less Than",NaN || Z || !N); |
| 928 |
case 0x1c: CONDRET("Not Greater Than or Equal", NaN || (N && !Z)); |
| 929 |
case 0x1d: CONDRET("Not Greater Than",NaN || Z || N); |
| 930 |
case 0x1e: CONDRET("Signaling Not Equal",!Z); |
| 931 |
case 0x1f: CONDRET("Signaling True",1); |
| 932 |
default: CONDRET("",-1); |
| 933 |
} |
| 934 |
} |
| 935 |
|
| 936 |
void FFPU fpuop_dbcc(uae_u32 opcode, uae_u32 extra) |
| 937 |
{ |
| 938 |
fpu_debug(("fdbcc_opp %X, %X at %08lx\n", (uae_u32)opcode, (uae_u32)extra, m68k_getpc ())); |
| 939 |
|
| 940 |
uaecptr pc = (uae_u32) m68k_getpc (); |
| 941 |
uae_s32 disp = (uae_s32) (uae_s16) next_iword(); |
| 942 |
int cc = fpp_cond(extra & 0x3f); |
| 943 |
if (cc == -1) { |
| 944 |
m68k_setpc (pc - 4); |
| 945 |
op_illg (opcode); |
| 946 |
} else if (!cc) { |
| 947 |
int reg = opcode & 0x7; |
| 948 |
|
| 949 |
// this may have leaked. |
| 950 |
/* |
| 951 |
m68k_dreg (regs, reg) = ((m68k_dreg (regs, reg) & ~0xffff) |
| 952 |
| ((m68k_dreg (regs, reg) - 1) & 0xffff)); |
| 953 |
*/ |
| 954 |
m68k_dreg (regs, reg) = ((m68k_dreg (regs, reg) & 0xffff0000) |
| 955 |
| (((m68k_dreg (regs, reg) & 0xffff) - 1) & 0xffff)); |
| 956 |
|
| 957 |
|
| 958 |
// condition reversed. |
| 959 |
// if ((m68k_dreg (regs, reg) & 0xffff) == 0xffff) |
| 960 |
if ((m68k_dreg (regs, reg) & 0xffff) != 0xffff) |
| 961 |
m68k_setpc (pc + disp); |
| 962 |
} |
| 963 |
} |
| 964 |
|
| 965 |
void FFPU fpuop_scc(uae_u32 opcode, uae_u32 extra) |
| 966 |
{ |
| 967 |
fpu_debug(("fscc_opp %X, %X at %08lx\n", (uae_u32)opcode, (uae_u32)extra, m68k_getpc ())); |
| 968 |
|
| 969 |
uae_u32 ad; |
| 970 |
int cc = fpp_cond(extra & 0x3f); |
| 971 |
if (cc == -1) { |
| 972 |
m68k_setpc (m68k_getpc () - 4); |
| 973 |
op_illg (opcode); |
| 974 |
} |
| 975 |
else if ((opcode & 0x38) == 0) { |
| 976 |
m68k_dreg (regs, opcode & 7) = (m68k_dreg (regs, opcode & 7) & ~0xff) | |
| 977 |
(cc ? 0xff : 0x00); |
| 978 |
} |
| 979 |
else if (get_fp_ad(opcode, &ad) == 0) { |
| 980 |
m68k_setpc (m68k_getpc () - 4); |
| 981 |
op_illg (opcode); |
| 982 |
} |
| 983 |
else |
| 984 |
put_byte(ad, cc ? 0xff : 0x00); |
| 985 |
} |
| 986 |
|
| 987 |
void FFPU fpuop_trapcc(uae_u32 opcode, uaecptr oldpc) |
| 988 |
{ |
| 989 |
fpu_debug(("ftrapcc_opp %X at %08lx\n", (uae_u32)opcode, m68k_getpc ())); |
| 990 |
|
| 991 |
int cc = fpp_cond(opcode & 0x3f); |
| 992 |
if (cc == -1) { |
| 993 |
m68k_setpc (oldpc); |
| 994 |
op_illg (opcode); |
| 995 |
} |
| 996 |
if (cc) |
| 997 |
Exception(7, oldpc - 2); |
| 998 |
} |
| 999 |
|
| 1000 |
// NOTE that we get here also when there is a FNOP (nontrapping false, displ 0) |
| 1001 |
void FFPU fpuop_bcc(uae_u32 opcode, uaecptr pc, uae_u32 extra) |
| 1002 |
{ |
| 1003 |
fpu_debug(("fbcc_opp %X, %X at %08lx, jumpto=%X\n", (uae_u32)opcode, (uae_u32)extra, m68k_getpc (), extra )); |
| 1004 |
|
| 1005 |
int cc = fpp_cond(opcode & 0x3f); |
| 1006 |
if (cc == -1) { |
| 1007 |
m68k_setpc (pc); |
| 1008 |
op_illg (opcode); |
| 1009 |
} |
| 1010 |
else if (cc) { |
| 1011 |
if ((opcode & 0x40) == 0) |
| 1012 |
extra = (uae_s32) (uae_s16) extra; |
| 1013 |
m68k_setpc (pc + extra); |
| 1014 |
} |
| 1015 |
} |
| 1016 |
|
| 1017 |
// FSAVE has no post-increment |
| 1018 |
// 0x1f180000 == IDLE state frame, coprocessor version number 1F |
| 1019 |
void FFPU fpuop_save(uae_u32 opcode) |
| 1020 |
{ |
| 1021 |
fpu_debug(("fsave_opp at %08lx\n", m68k_getpc ())); |
| 1022 |
|
| 1023 |
uae_u32 ad; |
| 1024 |
int incr = (opcode & 0x38) == 0x20 ? -1 : 1; |
| 1025 |
int i; |
| 1026 |
|
| 1027 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 1028 |
m68k_setpc (m68k_getpc () - 2); |
| 1029 |
op_illg (opcode); |
| 1030 |
return; |
| 1031 |
} |
| 1032 |
|
| 1033 |
if (CPUType == 4) { |
| 1034 |
// Put 4 byte 68040 IDLE frame. |
| 1035 |
if (incr < 0) { |
| 1036 |
ad -= 4; |
| 1037 |
put_long (ad, 0x41000000); |
| 1038 |
} |
| 1039 |
else { |
| 1040 |
put_long (ad, 0x41000000); |
| 1041 |
ad += 4; |
| 1042 |
} |
| 1043 |
} else { |
| 1044 |
// Put 28 byte 68881 IDLE frame. |
| 1045 |
if (incr < 0) { |
| 1046 |
fpu_debug(("fsave_opp pre-decrement\n")); |
| 1047 |
ad -= 4; |
| 1048 |
// What's this? Some BIU flags, or (incorrectly placed) command/condition? |
| 1049 |
put_long (ad, 0x70000000); |
| 1050 |
for (i = 0; i < 5; i++) { |
| 1051 |
ad -= 4; |
| 1052 |
put_long (ad, 0x00000000); |
| 1053 |
} |
| 1054 |
ad -= 4; |
| 1055 |
put_long (ad, 0x1f180000); // IDLE, vers 1f |
| 1056 |
} |
| 1057 |
else { |
| 1058 |
put_long (ad, 0x1f180000); // IDLE, vers 1f |
| 1059 |
ad += 4; |
| 1060 |
for (i = 0; i < 5; i++) { |
| 1061 |
put_long (ad, 0x00000000); |
| 1062 |
ad += 4; |
| 1063 |
} |
| 1064 |
// What's this? Some BIU flags, or (incorrectly placed) command/condition? |
| 1065 |
put_long (ad, 0x70000000); |
| 1066 |
ad += 4; |
| 1067 |
} |
| 1068 |
} |
| 1069 |
if ((opcode & 0x38) == 0x18) { |
| 1070 |
m68k_areg (regs, opcode & 7) = ad; // Never executed on a 68881 |
| 1071 |
fpu_debug(("PROBLEM: fsave_opp post-increment\n")); |
| 1072 |
} |
| 1073 |
if ((opcode & 0x38) == 0x20) { |
| 1074 |
m68k_areg (regs, opcode & 7) = ad; |
| 1075 |
fpu_debug(("fsave_opp pre-decrement %X -> A%d\n",ad,opcode & 7)); |
| 1076 |
} |
| 1077 |
} |
| 1078 |
|
| 1079 |
// FRESTORE has no pre-decrement |
| 1080 |
void FFPU fpuop_restore(uae_u32 opcode) |
| 1081 |
{ |
| 1082 |
fpu_debug(("frestore_opp at %08lx\n", m68k_getpc ())); |
| 1083 |
|
| 1084 |
uae_u32 ad; |
| 1085 |
uae_u32 d; |
| 1086 |
int incr = (opcode & 0x38) == 0x20 ? -1 : 1; |
| 1087 |
|
| 1088 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 1089 |
m68k_setpc (m68k_getpc () - 2); |
| 1090 |
op_illg (opcode); |
| 1091 |
return; |
| 1092 |
} |
| 1093 |
|
| 1094 |
if (CPUType == 4) { |
| 1095 |
// 68040 |
| 1096 |
if (incr < 0) { |
| 1097 |
fpu_debug(("PROBLEM: frestore_opp incr < 0\n")); |
| 1098 |
// this may be wrong, but it's never called. |
| 1099 |
ad -= 4; |
| 1100 |
d = get_long (ad); |
| 1101 |
if ((d & 0xff000000) != 0) { // Not a NULL frame? |
| 1102 |
if ((d & 0x00ff0000) == 0) { // IDLE |
| 1103 |
fpu_debug(("frestore_opp found IDLE frame at %X\n",ad-4)); |
| 1104 |
} |
| 1105 |
else if ((d & 0x00ff0000) == 0x00300000) { // UNIMP |
| 1106 |
fpu_debug(("PROBLEM: frestore_opp found UNIMP frame at %X\n",ad-4)); |
| 1107 |
ad -= 44; |
| 1108 |
} |
| 1109 |
else if ((d & 0x00ff0000) == 0x00600000) { // BUSY |
| 1110 |
fpu_debug(("PROBLEM: frestore_opp found BUSY frame at %X\n",ad-4)); |
| 1111 |
ad -= 92; |
| 1112 |
} |
| 1113 |
} |
| 1114 |
} |
| 1115 |
else { |
| 1116 |
d = get_long (ad); |
| 1117 |
fpu_debug(("frestore_opp frame at %X = %X\n",ad,d)); |
| 1118 |
ad += 4; |
| 1119 |
if ((d & 0xff000000) != 0) { // Not a NULL frame? |
| 1120 |
if ((d & 0x00ff0000) == 0) { // IDLE |
| 1121 |
fpu_debug(("frestore_opp found IDLE frame at %X\n",ad-4)); |
| 1122 |
} |
| 1123 |
else if ((d & 0x00ff0000) == 0x00300000) { // UNIMP |
| 1124 |
fpu_debug(("PROBLEM: frestore_opp found UNIMP frame at %X\n",ad-4)); |
| 1125 |
ad += 44; |
| 1126 |
} |
| 1127 |
else if ((d & 0x00ff0000) == 0x00600000) { // BUSY |
| 1128 |
fpu_debug(("PROBLEM: frestore_opp found BUSY frame at %X\n",ad-4)); |
| 1129 |
ad += 92; |
| 1130 |
} |
| 1131 |
} |
| 1132 |
} |
| 1133 |
} |
| 1134 |
else { |
| 1135 |
// 68881 |
| 1136 |
if (incr < 0) { |
| 1137 |
fpu_debug(("PROBLEM: frestore_opp incr < 0\n")); |
| 1138 |
// this may be wrong, but it's never called. |
| 1139 |
ad -= 4; |
| 1140 |
d = get_long (ad); |
| 1141 |
if ((d & 0xff000000) != 0) { |
| 1142 |
if ((d & 0x00ff0000) == 0x00180000) |
| 1143 |
ad -= 6 * 4; |
| 1144 |
else if ((d & 0x00ff0000) == 0x00380000) |
| 1145 |
ad -= 14 * 4; |
| 1146 |
else if ((d & 0x00ff0000) == 0x00b40000) |
| 1147 |
ad -= 45 * 4; |
| 1148 |
} |
| 1149 |
} |
| 1150 |
else { |
| 1151 |
d = get_long (ad); |
| 1152 |
fpu_debug(("frestore_opp frame at %X = %X\n",ad,d)); |
| 1153 |
ad += 4; |
| 1154 |
if ((d & 0xff000000) != 0) { // Not a NULL frame? |
| 1155 |
if ((d & 0x00ff0000) == 0x00180000) { // IDLE |
| 1156 |
fpu_debug(("frestore_opp found IDLE frame at %X\n",ad-4)); |
| 1157 |
ad += 6 * 4; |
| 1158 |
} |
| 1159 |
else if ((d & 0x00ff0000) == 0x00380000) {// UNIMP? shouldn't it be 3C? |
| 1160 |
ad += 14 * 4; |
| 1161 |
fpu_debug(("PROBLEM: frestore_opp found UNIMP? frame at %X\n",ad-4)); |
| 1162 |
} |
| 1163 |
else if ((d & 0x00ff0000) == 0x00b40000) {// BUSY |
| 1164 |
fpu_debug(("PROBLEM: frestore_opp found BUSY frame at %X\n",ad-4)); |
| 1165 |
ad += 45 * 4; |
| 1166 |
} |
| 1167 |
} |
| 1168 |
} |
| 1169 |
} |
| 1170 |
if ((opcode & 0x38) == 0x18) { |
| 1171 |
m68k_areg (regs, opcode & 7) = ad; |
| 1172 |
fpu_debug(("frestore_opp post-increment %X -> A%d\n",ad,opcode & 7)); |
| 1173 |
} |
| 1174 |
if ((opcode & 0x38) == 0x20) { |
| 1175 |
m68k_areg (regs, opcode & 7) = ad; // Never executed on a 68881 |
| 1176 |
fpu_debug(("PROBLEM: frestore_opp pre-decrement\n")); |
| 1177 |
} |
| 1178 |
} |
| 1179 |
|
| 1180 |
void FFPU fpuop_arithmetic(uae_u32 opcode, uae_u32 extra) |
| 1181 |
{ |
| 1182 |
int reg; |
| 1183 |
fpu_register src; |
| 1184 |
|
| 1185 |
fpu_debug(("FPP %04lx %04x at %08lx\n", opcode & 0xffff, extra & 0xffff, |
| 1186 |
m68k_getpc () - 4)); |
| 1187 |
|
| 1188 |
dump_registers( "START"); |
| 1189 |
|
| 1190 |
switch ((extra >> 13) & 0x7) { |
| 1191 |
case 3: |
| 1192 |
fpu_debug(("FMOVE -> <ea>\n")); |
| 1193 |
if (put_fp_value (opcode, extra, FPU registers[(extra >> 7) & 7]) == 0) { |
| 1194 |
m68k_setpc (m68k_getpc () - 4); |
| 1195 |
op_illg (opcode); |
| 1196 |
} |
| 1197 |
dump_registers( "END "); |
| 1198 |
return; |
| 1199 |
case 4: |
| 1200 |
case 5: |
| 1201 |
if ((opcode & 0x38) == 0) { |
| 1202 |
if (extra & 0x2000) { // dr bit |
| 1203 |
if (extra & 0x1000) { |
| 1204 |
// according to the manual, the msb bits are always zero. |
| 1205 |
m68k_dreg (regs, opcode & 7) = get_fpcr() & 0xFFFF; |
| 1206 |
fpu_debug(("FMOVEM FPU fpcr (%X) -> D%d\n", get_fpcr(), opcode & 7)); |
| 1207 |
} |
| 1208 |
if (extra & 0x0800) { |
| 1209 |
m68k_dreg (regs, opcode & 7) = get_fpsr(); |
| 1210 |
fpu_debug(("FMOVEM FPU fpsr (%X) -> D%d\n", get_fpsr(), opcode & 7)); |
| 1211 |
} |
| 1212 |
if (extra & 0x0400) { |
| 1213 |
m68k_dreg (regs, opcode & 7) = FPU instruction_address; |
| 1214 |
fpu_debug(("FMOVEM FPU instruction_address (%X) -> D%d\n", FPU instruction_address, opcode & 7)); |
| 1215 |
} |
| 1216 |
} |
| 1217 |
else { |
| 1218 |
if (extra & 0x1000) { |
| 1219 |
set_fpcr( m68k_dreg (regs, opcode & 7) ); |
| 1220 |
fpu_debug(("FMOVEM D%d (%X) -> FPU fpcr\n", opcode & 7, get_fpcr())); |
| 1221 |
} |
| 1222 |
if (extra & 0x0800) { |
| 1223 |
set_fpsr( m68k_dreg (regs, opcode & 7) ); |
| 1224 |
fpu_debug(("FMOVEM D%d (%X) -> FPU fpsr\n", opcode & 7, get_fpsr())); |
| 1225 |
} |
| 1226 |
if (extra & 0x0400) { |
| 1227 |
FPU instruction_address = m68k_dreg (regs, opcode & 7); |
| 1228 |
fpu_debug(("FMOVEM D%d (%X) -> FPU instruction_address\n", opcode & 7, FPU instruction_address)); |
| 1229 |
} |
| 1230 |
} |
| 1231 |
// } else if ((opcode & 0x38) == 1) { |
| 1232 |
} |
| 1233 |
else if ((opcode & 0x38) == 8) { |
| 1234 |
if (extra & 0x2000) { // dr bit |
| 1235 |
if (extra & 0x1000) { |
| 1236 |
// according to the manual, the msb bits are always zero. |
| 1237 |
m68k_areg (regs, opcode & 7) = get_fpcr() & 0xFFFF; |
| 1238 |
fpu_debug(("FMOVEM FPU fpcr (%X) -> A%d\n", get_fpcr(), opcode & 7)); |
| 1239 |
} |
| 1240 |
if (extra & 0x0800) { |
| 1241 |
m68k_areg (regs, opcode & 7) = get_fpsr(); |
| 1242 |
fpu_debug(("FMOVEM FPU fpsr (%X) -> A%d\n", get_fpsr(), opcode & 7)); |
| 1243 |
} |
| 1244 |
if (extra & 0x0400) { |
| 1245 |
m68k_areg (regs, opcode & 7) = FPU instruction_address; |
| 1246 |
fpu_debug(("FMOVEM FPU instruction_address (%X) -> A%d\n", FPU instruction_address, opcode & 7)); |
| 1247 |
} |
| 1248 |
} else { |
| 1249 |
if (extra & 0x1000) { |
| 1250 |
set_fpcr( m68k_areg (regs, opcode & 7) ); |
| 1251 |
fpu_debug(("FMOVEM A%d (%X) -> FPU fpcr\n", opcode & 7, get_fpcr())); |
| 1252 |
} |
| 1253 |
if (extra & 0x0800) { |
| 1254 |
set_fpsr( m68k_areg (regs, opcode & 7) ); |
| 1255 |
fpu_debug(("FMOVEM A%d (%X) -> FPU fpsr\n", opcode & 7, get_fpsr())); |
| 1256 |
} |
| 1257 |
if (extra & 0x0400) { |
| 1258 |
FPU instruction_address = m68k_areg (regs, opcode & 7); |
| 1259 |
fpu_debug(("FMOVEM A%d (%X) -> FPU instruction_address\n", opcode & 7, FPU instruction_address)); |
| 1260 |
} |
| 1261 |
} |
| 1262 |
} |
| 1263 |
else if ((opcode & 0x3f) == 0x3c) { |
| 1264 |
if ((extra & 0x2000) == 0) { |
| 1265 |
if (extra & 0x1000) { |
| 1266 |
set_fpcr( next_ilong() ); |
| 1267 |
fpu_debug(("FMOVEM #<%X> -> FPU fpcr\n", get_fpcr())); |
| 1268 |
} |
| 1269 |
if (extra & 0x0800) { |
| 1270 |
set_fpsr( next_ilong() ); |
| 1271 |
fpu_debug(("FMOVEM #<%X> -> FPU fpsr\n", get_fpsr())); |
| 1272 |
} |
| 1273 |
if (extra & 0x0400) { |
| 1274 |
FPU instruction_address = next_ilong(); |
| 1275 |
fpu_debug(("FMOVEM #<%X> -> FPU instruction_address\n", FPU instruction_address)); |
| 1276 |
} |
| 1277 |
} |
| 1278 |
} |
| 1279 |
else if (extra & 0x2000) { |
| 1280 |
/* FMOVEM FPP->memory */ |
| 1281 |
uae_u32 ad; |
| 1282 |
int incr = 0; |
| 1283 |
|
| 1284 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 1285 |
m68k_setpc (m68k_getpc () - 4); |
| 1286 |
op_illg (opcode); |
| 1287 |
dump_registers( "END "); |
| 1288 |
return; |
| 1289 |
} |
| 1290 |
if ((opcode & 0x38) == 0x20) { |
| 1291 |
if (extra & 0x1000) |
| 1292 |
incr += 4; |
| 1293 |
if (extra & 0x0800) |
| 1294 |
incr += 4; |
| 1295 |
if (extra & 0x0400) |
| 1296 |
incr += 4; |
| 1297 |
} |
| 1298 |
ad -= incr; |
| 1299 |
if (extra & 0x1000) { |
| 1300 |
// according to the manual, the msb bits are always zero. |
| 1301 |
put_long (ad, get_fpcr() & 0xFFFF); |
| 1302 |
fpu_debug(("FMOVEM FPU fpcr (%X) -> mem %X\n", get_fpcr(), ad )); |
| 1303 |
ad += 4; |
| 1304 |
} |
| 1305 |
if (extra & 0x0800) { |
| 1306 |
put_long (ad, get_fpsr()); |
| 1307 |
fpu_debug(("FMOVEM FPU fpsr (%X) -> mem %X\n", get_fpsr(), ad )); |
| 1308 |
ad += 4; |
| 1309 |
} |
| 1310 |
if (extra & 0x0400) { |
| 1311 |
put_long (ad, FPU instruction_address); |
| 1312 |
fpu_debug(("FMOVEM FPU instruction_address (%X) -> mem %X\n", FPU instruction_address, ad )); |
| 1313 |
ad += 4; |
| 1314 |
} |
| 1315 |
ad -= incr; |
| 1316 |
if ((opcode & 0x38) == 0x18) // post-increment? |
| 1317 |
m68k_areg (regs, opcode & 7) = ad; |
| 1318 |
if ((opcode & 0x38) == 0x20) // pre-decrement? |
| 1319 |
m68k_areg (regs, opcode & 7) = ad; |
| 1320 |
} |
| 1321 |
else { |
| 1322 |
/* FMOVEM memory->FPP */ |
| 1323 |
uae_u32 ad; |
| 1324 |
|
| 1325 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 1326 |
m68k_setpc (m68k_getpc () - 4); |
| 1327 |
op_illg (opcode); |
| 1328 |
dump_registers( "END "); |
| 1329 |
return; |
| 1330 |
} |
| 1331 |
|
| 1332 |
// ad = (opcode & 0x38) == 0x20 ? ad - 12 : ad; |
| 1333 |
int incr = 0; |
| 1334 |
if((opcode & 0x38) == 0x20) { |
| 1335 |
if (extra & 0x1000) |
| 1336 |
incr += 4; |
| 1337 |
if (extra & 0x0800) |
| 1338 |
incr += 4; |
| 1339 |
if (extra & 0x0400) |
| 1340 |
incr += 4; |
| 1341 |
ad = ad - incr; |
| 1342 |
} |
| 1343 |
|
| 1344 |
if (extra & 0x1000) { |
| 1345 |
set_fpcr( get_long (ad) ); |
| 1346 |
fpu_debug(("FMOVEM mem %X (%X) -> FPU fpcr\n", ad, get_fpcr() )); |
| 1347 |
ad += 4; |
| 1348 |
} |
| 1349 |
if (extra & 0x0800) { |
| 1350 |
set_fpsr( get_long (ad) ); |
| 1351 |
fpu_debug(("FMOVEM mem %X (%X) -> FPU fpsr\n", ad, get_fpsr() )); |
| 1352 |
ad += 4; |
| 1353 |
} |
| 1354 |
if (extra & 0x0400) { |
| 1355 |
FPU instruction_address = get_long (ad); |
| 1356 |
fpu_debug(("FMOVEM mem %X (%X) -> FPU instruction_address\n", ad, FPU instruction_address )); |
| 1357 |
ad += 4; |
| 1358 |
} |
| 1359 |
if ((opcode & 0x38) == 0x18) // post-increment? |
| 1360 |
m68k_areg (regs, opcode & 7) = ad; |
| 1361 |
if ((opcode & 0x38) == 0x20) // pre-decrement? |
| 1362 |
// m68k_areg (regs, opcode & 7) = ad - 12; |
| 1363 |
m68k_areg (regs, opcode & 7) = ad - incr; |
| 1364 |
} |
| 1365 |
dump_registers( "END "); |
| 1366 |
return; |
| 1367 |
case 6: |
| 1368 |
case 7: { |
| 1369 |
uae_u32 ad, list = 0; |
| 1370 |
int incr = 0; |
| 1371 |
if (extra & 0x2000) { |
| 1372 |
/* FMOVEM FPP->memory */ |
| 1373 |
fpu_debug(("FMOVEM FPP->memory\n")); |
| 1374 |
|
| 1375 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 1376 |
m68k_setpc (m68k_getpc () - 4); |
| 1377 |
op_illg (opcode); |
| 1378 |
dump_registers( "END "); |
| 1379 |
return; |
| 1380 |
} |
| 1381 |
switch ((extra >> 11) & 3) { |
| 1382 |
case 0: /* static pred */ |
| 1383 |
list = extra & 0xff; |
| 1384 |
incr = -1; |
| 1385 |
break; |
| 1386 |
case 1: /* dynamic pred */ |
| 1387 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 1388 |
incr = -1; |
| 1389 |
break; |
| 1390 |
case 2: /* static postinc */ |
| 1391 |
list = extra & 0xff; |
| 1392 |
incr = 1; |
| 1393 |
break; |
| 1394 |
case 3: /* dynamic postinc */ |
| 1395 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 1396 |
incr = 1; |
| 1397 |
break; |
| 1398 |
} |
| 1399 |
|
| 1400 |
if (incr < 0) { |
| 1401 |
for(reg=7; reg>=0; reg--) { |
| 1402 |
uae_u32 wrd1, wrd2, wrd3; |
| 1403 |
if( list & 0x80 ) { |
| 1404 |
extract_extended(FPU registers[reg],&wrd1, &wrd2, &wrd3); |
| 1405 |
ad -= 4; |
| 1406 |
put_long (ad, wrd3); |
| 1407 |
ad -= 4; |
| 1408 |
put_long (ad, wrd2); |
| 1409 |
ad -= 4; |
| 1410 |
put_long (ad, wrd1); |
| 1411 |
} |
| 1412 |
list <<= 1; |
| 1413 |
} |
| 1414 |
} |
| 1415 |
else { |
| 1416 |
for(reg=0; reg<8; reg++) { |
| 1417 |
uae_u32 wrd1, wrd2, wrd3; |
| 1418 |
if( list & 0x80 ) { |
| 1419 |
extract_extended(FPU registers[reg],&wrd1, &wrd2, &wrd3); |
| 1420 |
put_long (ad, wrd1); |
| 1421 |
ad += 4; |
| 1422 |
put_long (ad, wrd2); |
| 1423 |
ad += 4; |
| 1424 |
put_long (ad, wrd3); |
| 1425 |
ad += 4; |
| 1426 |
} |
| 1427 |
list <<= 1; |
| 1428 |
} |
| 1429 |
} |
| 1430 |
if ((opcode & 0x38) == 0x18) // post-increment? |
| 1431 |
m68k_areg (regs, opcode & 7) = ad; |
| 1432 |
if ((opcode & 0x38) == 0x20) // pre-decrement? |
| 1433 |
m68k_areg (regs, opcode & 7) = ad; |
| 1434 |
} |
| 1435 |
else { |
| 1436 |
/* FMOVEM memory->FPP */ |
| 1437 |
fpu_debug(("FMOVEM memory->FPP\n")); |
| 1438 |
|
| 1439 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 1440 |
m68k_setpc (m68k_getpc () - 4); |
| 1441 |
op_illg (opcode); |
| 1442 |
dump_registers( "END "); |
| 1443 |
return; |
| 1444 |
} |
| 1445 |
switch ((extra >> 11) & 3) { |
| 1446 |
case 0: /* static pred */ |
| 1447 |
fpu_debug(("memory->FMOVEM FPP not legal mode.\n")); |
| 1448 |
list = extra & 0xff; |
| 1449 |
incr = -1; |
| 1450 |
break; |
| 1451 |
case 1: /* dynamic pred */ |
| 1452 |
fpu_debug(("memory->FMOVEM FPP not legal mode.\n")); |
| 1453 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 1454 |
incr = -1; |
| 1455 |
break; |
| 1456 |
case 2: /* static postinc */ |
| 1457 |
list = extra & 0xff; |
| 1458 |
incr = 1; |
| 1459 |
break; |
| 1460 |
case 3: /* dynamic postinc */ |
| 1461 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 1462 |
incr = 1; |
| 1463 |
break; |
| 1464 |
} |
| 1465 |
|
| 1466 |
/**/ |
| 1467 |
if (incr < 0) { |
| 1468 |
// not reached |
| 1469 |
for(reg=7; reg>=0; reg--) { |
| 1470 |
uae_u32 wrd1, wrd2, wrd3; |
| 1471 |
if( list & 0x80 ) { |
| 1472 |
ad -= 4; |
| 1473 |
wrd3 = get_long (ad); |
| 1474 |
ad -= 4; |
| 1475 |
wrd2 = get_long (ad); |
| 1476 |
ad -= 4; |
| 1477 |
wrd1 = get_long (ad); |
| 1478 |
// FPU registers[reg] = make_extended(wrd1, wrd2, wrd3); |
| 1479 |
make_extended_no_normalize (wrd1, wrd2, wrd3, FPU registers[reg]); |
| 1480 |
} |
| 1481 |
list <<= 1; |
| 1482 |
} |
| 1483 |
} |
| 1484 |
else { |
| 1485 |
for(reg=0; reg<8; reg++) { |
| 1486 |
uae_u32 wrd1, wrd2, wrd3; |
| 1487 |
if( list & 0x80 ) { |
| 1488 |
wrd1 = get_long (ad); |
| 1489 |
ad += 4; |
| 1490 |
wrd2 = get_long (ad); |
| 1491 |
ad += 4; |
| 1492 |
wrd3 = get_long (ad); |
| 1493 |
ad += 4; |
| 1494 |
// FPU registers[reg] = make_extended(wrd1, wrd2, wrd3); |
| 1495 |
make_extended_no_normalize (wrd1, wrd2, wrd3, FPU registers[reg]); |
| 1496 |
} |
| 1497 |
list <<= 1; |
| 1498 |
} |
| 1499 |
} |
| 1500 |
if ((opcode & 0x38) == 0x18) // post-increment? |
| 1501 |
m68k_areg (regs, opcode & 7) = ad; |
| 1502 |
if ((opcode & 0x38) == 0x20) // pre-decrement? |
| 1503 |
m68k_areg (regs, opcode & 7) = ad; |
| 1504 |
} |
| 1505 |
dump_registers( "END "); |
| 1506 |
return; |
| 1507 |
} |
| 1508 |
case 0: |
| 1509 |
case 2: |
| 1510 |
reg = (extra >> 7) & 7; |
| 1511 |
if ((extra & 0xfc00) == 0x5c00) { |
| 1512 |
fpu_debug(("FMOVECR memory->FPP\n")); |
| 1513 |
switch (extra & 0x7f) { |
| 1514 |
case 0x00: |
| 1515 |
// FPU registers[reg] = 4.0 * atan(1.0); |
| 1516 |
FPU registers[reg] = 3.1415926535897932384626433832795; |
| 1517 |
fpu_debug(("FP const: Pi\n")); |
| 1518 |
break; |
| 1519 |
case 0x0b: |
| 1520 |
// FPU registers[reg] = log10 (2.0); |
| 1521 |
FPU registers[reg] = 0.30102999566398119521373889472449; |
| 1522 |
fpu_debug(("FP const: Log 10 (2)\n")); |
| 1523 |
break; |
| 1524 |
case 0x0c: |
| 1525 |
// FPU registers[reg] = exp (1.0); |
| 1526 |
FPU registers[reg] = 2.7182818284590452353602874713527; |
| 1527 |
fpu_debug(("FP const: e\n")); |
| 1528 |
break; |
| 1529 |
case 0x0d: |
| 1530 |
// FPU registers[reg] = log (exp (1.0)) / log (2.0); |
| 1531 |
FPU registers[reg] = 1.4426950408889634073599246810019; |
| 1532 |
fpu_debug(("FP const: Log 2 (e)\n")); |
| 1533 |
break; |
| 1534 |
case 0x0e: |
| 1535 |
// FPU registers[reg] = log (exp (1.0)) / log (10.0); |
| 1536 |
FPU registers[reg] = 0.43429448190325182765112891891661; |
| 1537 |
fpu_debug(("FP const: Log 10 (e)\n")); |
| 1538 |
break; |
| 1539 |
case 0x0f: |
| 1540 |
FPU registers[reg] = 0.0; |
| 1541 |
fpu_debug(("FP const: zero\n")); |
| 1542 |
break; |
| 1543 |
case 0x30: |
| 1544 |
// FPU registers[reg] = log (2.0); |
| 1545 |
FPU registers[reg] = 0.69314718055994530941723212145818; |
| 1546 |
fpu_debug(("FP const: ln(2)\n")); |
| 1547 |
break; |
| 1548 |
case 0x31: |
| 1549 |
// FPU registers[reg] = log (10.0); |
| 1550 |
FPU registers[reg] = 2.3025850929940456840179914546844; |
| 1551 |
fpu_debug(("FP const: ln(10)\n")); |
| 1552 |
break; |
| 1553 |
case 0x32: |
| 1554 |
// ?? |
| 1555 |
FPU registers[reg] = 1.0e0; |
| 1556 |
fpu_debug(("FP const: 1.0e0\n")); |
| 1557 |
break; |
| 1558 |
case 0x33: |
| 1559 |
FPU registers[reg] = 1.0e1; |
| 1560 |
fpu_debug(("FP const: 1.0e1\n")); |
| 1561 |
break; |
| 1562 |
case 0x34: |
| 1563 |
FPU registers[reg] = 1.0e2; |
| 1564 |
fpu_debug(("FP const: 1.0e2\n")); |
| 1565 |
break; |
| 1566 |
case 0x35: |
| 1567 |
FPU registers[reg] = 1.0e4; |
| 1568 |
fpu_debug(("FP const: 1.0e4\n")); |
| 1569 |
break; |
| 1570 |
case 0x36: |
| 1571 |
FPU registers[reg] = 1.0e8; |
| 1572 |
fpu_debug(("FP const: 1.0e8\n")); |
| 1573 |
break; |
| 1574 |
case 0x37: |
| 1575 |
FPU registers[reg] = 1.0e16; |
| 1576 |
fpu_debug(("FP const: 1.0e16\n")); |
| 1577 |
break; |
| 1578 |
case 0x38: |
| 1579 |
FPU registers[reg] = 1.0e32; |
| 1580 |
fpu_debug(("FP const: 1.0e32\n")); |
| 1581 |
break; |
| 1582 |
case 0x39: |
| 1583 |
FPU registers[reg] = 1.0e64; |
| 1584 |
fpu_debug(("FP const: 1.0e64\n")); |
| 1585 |
break; |
| 1586 |
case 0x3a: |
| 1587 |
FPU registers[reg] = 1.0e128; |
| 1588 |
fpu_debug(("FP const: 1.0e128\n")); |
| 1589 |
break; |
| 1590 |
case 0x3b: |
| 1591 |
FPU registers[reg] = 1.0e256; |
| 1592 |
fpu_debug(("FP const: 1.0e256\n")); |
| 1593 |
break; |
| 1594 |
#if USE_LONG_DOUBLE |
| 1595 |
case 0x3c: |
| 1596 |
FPU registers[reg] = 1.0e512; |
| 1597 |
fpu_debug(("FP const: 1.0e512\n")); |
| 1598 |
break; |
| 1599 |
case 0x3d: |
| 1600 |
FPU registers[reg] = 1.0e1024; |
| 1601 |
fpu_debug(("FP const: 1.0e1024\n")); |
| 1602 |
break; |
| 1603 |
case 0x3e: |
| 1604 |
FPU registers[reg] = 1.0e2048; |
| 1605 |
fpu_debug(("FP const: 1.0e2048\n")); |
| 1606 |
break; |
| 1607 |
case 0x3f: |
| 1608 |
FPU registers[reg] = 1.0e4096; |
| 1609 |
fpu_debug(("FP const: 1.0e4096\n")); |
| 1610 |
#endif |
| 1611 |
break; |
| 1612 |
default: |
| 1613 |
m68k_setpc (m68k_getpc () - 4); |
| 1614 |
op_illg (opcode); |
| 1615 |
break; |
| 1616 |
} |
| 1617 |
// these *do* affect the status reg |
| 1618 |
make_fpsr(FPU registers[reg]); |
| 1619 |
dump_registers( "END "); |
| 1620 |
return; |
| 1621 |
} |
| 1622 |
|
| 1623 |
if (get_fp_value (opcode, extra, src) == 0) { |
| 1624 |
m68k_setpc (m68k_getpc () - 4); |
| 1625 |
op_illg (opcode); |
| 1626 |
dump_registers( "END "); |
| 1627 |
return; |
| 1628 |
} |
| 1629 |
fpu_debug(("returned from get_fp_value m68k_getpc()=%X\n",m68k_getpc())); |
| 1630 |
|
| 1631 |
if (FPU is_integral) { |
| 1632 |
// 68040-specific operations |
| 1633 |
switch (extra & 0x7f) { |
| 1634 |
case 0x40: /* FSMOVE */ |
| 1635 |
fpu_debug(("FSMOVE %.04f\n",(double)src)); |
| 1636 |
FPU registers[reg] = (float)src; |
| 1637 |
make_fpsr(FPU registers[reg]); |
| 1638 |
break; |
| 1639 |
case 0x44: /* FDMOVE */ |
| 1640 |
fpu_debug(("FDMOVE %.04f\n",(double)src)); |
| 1641 |
FPU registers[reg] = (double)src; |
| 1642 |
make_fpsr(FPU registers[reg]); |
| 1643 |
break; |
| 1644 |
case 0x41: /* FSSQRT */ |
| 1645 |
fpu_debug(("FSQRT %.04f\n",(double)src)); |
| 1646 |
FPU registers[reg] = (float)fp_sqrt (src); |
| 1647 |
make_fpsr(FPU registers[reg]); |
| 1648 |
break; |
| 1649 |
case 0x45: /* FDSQRT */ |
| 1650 |
fpu_debug(("FSQRT %.04f\n",(double)src)); |
| 1651 |
FPU registers[reg] = (double)fp_sqrt (src); |
| 1652 |
make_fpsr(FPU registers[reg]); |
| 1653 |
break; |
| 1654 |
case 0x58: /* FSABS */ |
| 1655 |
fpu_debug(("FSABS %.04f\n",(double)src)); |
| 1656 |
FPU registers[reg] = (float)fp_fabs(src); |
| 1657 |
make_fpsr(FPU registers[reg]); |
| 1658 |
break; |
| 1659 |
case 0x5c: /* FDABS */ |
| 1660 |
fpu_debug(("FDABS %.04f\n",(double)src)); |
| 1661 |
FPU registers[reg] = (double)fp_fabs(src); |
| 1662 |
make_fpsr(FPU registers[reg]); |
| 1663 |
break; |
| 1664 |
case 0x5a: /* FSNEG */ |
| 1665 |
fpu_debug(("FSNEG %.04f\n",(double)src)); |
| 1666 |
FPU registers[reg] = (float)-src; |
| 1667 |
make_fpsr(FPU registers[reg]); |
| 1668 |
break; |
| 1669 |
case 0x5e: /* FDNEG */ |
| 1670 |
fpu_debug(("FDNEG %.04f\n",(double)src)); |
| 1671 |
FPU registers[reg] = (double)-src; |
| 1672 |
make_fpsr(FPU registers[reg]); |
| 1673 |
break; |
| 1674 |
case 0x60: /* FSDIV */ |
| 1675 |
fpu_debug(("FSDIV %.04f\n",(double)src)); |
| 1676 |
FPU registers[reg] = (float)(FPU registers[reg] / src); |
| 1677 |
make_fpsr(FPU registers[reg]); |
| 1678 |
break; |
| 1679 |
case 0x64: /* FDDIV */ |
| 1680 |
fpu_debug(("FDDIV %.04f\n",(double)src)); |
| 1681 |
FPU registers[reg] = (double)(FPU registers[reg] / src); |
| 1682 |
make_fpsr(FPU registers[reg]); |
| 1683 |
break; |
| 1684 |
case 0x62: /* FSADD */ |
| 1685 |
fpu_debug(("FSADD %.04f\n",(double)src)); |
| 1686 |
FPU registers[reg] = (float)(FPU registers[reg] + src); |
| 1687 |
make_fpsr(FPU registers[reg]); |
| 1688 |
break; |
| 1689 |
case 0x66: /* FDADD */ |
| 1690 |
fpu_debug(("FDADD %.04f\n",(double)src)); |
| 1691 |
FPU registers[reg] = (double)(FPU registers[reg] + src); |
| 1692 |
make_fpsr(FPU registers[reg]); |
| 1693 |
break; |
| 1694 |
case 0x68: /* FSSUB */ |
| 1695 |
fpu_debug(("FSSUB %.04f\n",(double)src)); |
| 1696 |
FPU registers[reg] = (float)(FPU registers[reg] - src); |
| 1697 |
make_fpsr(FPU registers[reg]); |
| 1698 |
break; |
| 1699 |
case 0x6c: /* FDSUB */ |
| 1700 |
fpu_debug(("FDSUB %.04f\n",(double)src)); |
| 1701 |
FPU registers[reg] = (double)(FPU registers[reg] - src); |
| 1702 |
make_fpsr(FPU registers[reg]); |
| 1703 |
break; |
| 1704 |
case 0x63: /* FSMUL */ |
| 1705 |
case 0x67: /* FDMUL */ |
| 1706 |
fpu_debug(("FMUL %.04f\n",(double)src)); |
| 1707 |
get_dest_flags(FPU registers[reg]); |
| 1708 |
get_source_flags(src); |
| 1709 |
if(fl_dest.in_range && fl_source.in_range) { |
| 1710 |
if ((extra & 0x7f) == 0x63) |
| 1711 |
FPU registers[reg] = (float)(FPU registers[reg] * src); |
| 1712 |
else |
| 1713 |
FPU registers[reg] = (double)(FPU registers[reg] * src); |
| 1714 |
} |
| 1715 |
else if (fl_dest.nan || fl_source.nan || |
| 1716 |
fl_dest.zero && fl_source.infinity || |
| 1717 |
fl_dest.infinity && fl_source.zero ) { |
| 1718 |
make_nan( FPU registers[reg] ); |
| 1719 |
} |
| 1720 |
else if (fl_dest.zero || fl_source.zero ) { |
| 1721 |
if (fl_dest.negative && !fl_source.negative || |
| 1722 |
!fl_dest.negative && fl_source.negative) { |
| 1723 |
make_zero_negative(FPU registers[reg]); |
| 1724 |
} |
| 1725 |
else { |
| 1726 |
make_zero_positive(FPU registers[reg]); |
| 1727 |
} |
| 1728 |
} |
| 1729 |
else { |
| 1730 |
if( fl_dest.negative && !fl_source.negative || |
| 1731 |
!fl_dest.negative && fl_source.negative) { |
| 1732 |
make_inf_negative(FPU registers[reg]); |
| 1733 |
} |
| 1734 |
else { |
| 1735 |
make_inf_positive(FPU registers[reg]); |
| 1736 |
} |
| 1737 |
} |
| 1738 |
make_fpsr(FPU registers[reg]); |
| 1739 |
break; |
| 1740 |
default: |
| 1741 |
// Continue decode-execute 6888x instructions below |
| 1742 |
goto process_6888x_instructions; |
| 1743 |
} |
| 1744 |
fpu_debug(("END m68k_getpc()=%X\n",m68k_getpc())); |
| 1745 |
dump_registers( "END "); |
| 1746 |
return; |
| 1747 |
} |
| 1748 |
|
| 1749 |
process_6888x_instructions: |
| 1750 |
switch (extra & 0x7f) { |
| 1751 |
case 0x00: /* FMOVE */ |
| 1752 |
fpu_debug(("FMOVE %.04f\n",(double)src)); |
| 1753 |
FPU registers[reg] = src; |
| 1754 |
make_fpsr(FPU registers[reg]); |
| 1755 |
break; |
| 1756 |
case 0x01: /* FINT */ |
| 1757 |
fpu_debug(("FINT %.04f\n",(double)src)); |
| 1758 |
FPU registers[reg] = toint(src); |
| 1759 |
make_fpsr(FPU registers[reg]); |
| 1760 |
break; |
| 1761 |
case 0x02: /* FSINH */ |
| 1762 |
fpu_debug(("FSINH %.04f\n",(double)src)); |
| 1763 |
FPU registers[reg] = fp_sinh (src); |
| 1764 |
make_fpsr(FPU registers[reg]); |
| 1765 |
break; |
| 1766 |
case 0x03: /* FINTRZ */ |
| 1767 |
fpu_debug(("FINTRZ %.04f\n",(double)src)); |
| 1768 |
FPU registers[reg] = fp_round_to_zero(src); |
| 1769 |
make_fpsr(FPU registers[reg]); |
| 1770 |
break; |
| 1771 |
case 0x04: /* FSQRT */ |
| 1772 |
fpu_debug(("FSQRT %.04f\n",(double)src)); |
| 1773 |
FPU registers[reg] = fp_sqrt (src); |
| 1774 |
make_fpsr(FPU registers[reg]); |
| 1775 |
break; |
| 1776 |
case 0x06: /* FLOGNP1 */ |
| 1777 |
fpu_debug(("FLOGNP1 %.04f\n",(double)src)); |
| 1778 |
FPU registers[reg] = fp_log (src + 1.0); |
| 1779 |
make_fpsr(FPU registers[reg]); |
| 1780 |
break; |
| 1781 |
case 0x08: /* FETOXM1 */ |
| 1782 |
fpu_debug(("FETOXM1 %.04f\n",(double)src)); |
| 1783 |
FPU registers[reg] = fp_exp (src) - 1.0; |
| 1784 |
make_fpsr(FPU registers[reg]); |
| 1785 |
break; |
| 1786 |
case 0x09: /* FTANH */ |
| 1787 |
fpu_debug(("FTANH %.04f\n",(double)src)); |
| 1788 |
FPU registers[reg] = fp_tanh (src); |
| 1789 |
make_fpsr(FPU registers[reg]); |
| 1790 |
break; |
| 1791 |
case 0x0a: /* FATAN */ |
| 1792 |
fpu_debug(("FATAN %.04f\n",(double)src)); |
| 1793 |
FPU registers[reg] = fp_atan (src); |
| 1794 |
make_fpsr(FPU registers[reg]); |
| 1795 |
break; |
| 1796 |
case 0x0c: /* FASIN */ |
| 1797 |
fpu_debug(("FASIN %.04f\n",(double)src)); |
| 1798 |
FPU registers[reg] = fp_asin (src); |
| 1799 |
make_fpsr(FPU registers[reg]); |
| 1800 |
break; |
| 1801 |
case 0x0d: /* FATANH */ |
| 1802 |
fpu_debug(("FATANH %.04f\n",(double)src)); |
| 1803 |
FPU registers[reg] = fp_atanh (src); |
| 1804 |
make_fpsr(FPU registers[reg]); |
| 1805 |
break; |
| 1806 |
case 0x0e: /* FSIN */ |
| 1807 |
fpu_debug(("FSIN %.04f\n",(double)src)); |
| 1808 |
FPU registers[reg] = fp_sin (src); |
| 1809 |
make_fpsr(FPU registers[reg]); |
| 1810 |
break; |
| 1811 |
case 0x0f: /* FTAN */ |
| 1812 |
fpu_debug(("FTAN %.04f\n",(double)src)); |
| 1813 |
FPU registers[reg] = fp_tan (src); |
| 1814 |
make_fpsr(FPU registers[reg]); |
| 1815 |
break; |
| 1816 |
case 0x10: /* FETOX */ |
| 1817 |
fpu_debug(("FETOX %.04f\n",(double)src)); |
| 1818 |
FPU registers[reg] = fp_exp (src); |
| 1819 |
make_fpsr(FPU registers[reg]); |
| 1820 |
break; |
| 1821 |
case 0x11: /* FTWOTOX */ |
| 1822 |
fpu_debug(("FTWOTOX %.04f\n",(double)src)); |
| 1823 |
FPU registers[reg] = fp_pow(2.0, src); |
| 1824 |
make_fpsr(FPU registers[reg]); |
| 1825 |
break; |
| 1826 |
case 0x12: /* FTENTOX */ |
| 1827 |
fpu_debug(("FTENTOX %.04f\n",(double)src)); |
| 1828 |
FPU registers[reg] = fp_pow(10.0, src); |
| 1829 |
make_fpsr(FPU registers[reg]); |
| 1830 |
break; |
| 1831 |
case 0x14: /* FLOGN */ |
| 1832 |
fpu_debug(("FLOGN %.04f\n",(double)src)); |
| 1833 |
FPU registers[reg] = fp_log (src); |
| 1834 |
make_fpsr(FPU registers[reg]); |
| 1835 |
break; |
| 1836 |
case 0x15: /* FLOG10 */ |
| 1837 |
fpu_debug(("FLOG10 %.04f\n",(double)src)); |
| 1838 |
FPU registers[reg] = fp_log10 (src); |
| 1839 |
make_fpsr(FPU registers[reg]); |
| 1840 |
break; |
| 1841 |
case 0x16: /* FLOG2 */ |
| 1842 |
fpu_debug(("FLOG2 %.04f\n",(double)src)); |
| 1843 |
FPU registers[reg] = fp_log (src) / fp_log (2.0); |
| 1844 |
make_fpsr(FPU registers[reg]); |
| 1845 |
break; |
| 1846 |
case 0x18: /* FABS */ |
| 1847 |
fpu_debug(("FABS %.04f\n",(double)src)); |
| 1848 |
FPU registers[reg] = fp_fabs(src); |
| 1849 |
make_fpsr(FPU registers[reg]); |
| 1850 |
break; |
| 1851 |
case 0x19: /* FCOSH */ |
| 1852 |
fpu_debug(("FCOSH %.04f\n",(double)src)); |
| 1853 |
FPU registers[reg] = fp_cosh(src); |
| 1854 |
make_fpsr(FPU registers[reg]); |
| 1855 |
break; |
| 1856 |
case 0x1a: /* FNEG */ |
| 1857 |
fpu_debug(("FNEG %.04f\n",(double)src)); |
| 1858 |
FPU registers[reg] = -src; |
| 1859 |
make_fpsr(FPU registers[reg]); |
| 1860 |
break; |
| 1861 |
case 0x1c: /* FACOS */ |
| 1862 |
fpu_debug(("FACOS %.04f\n",(double)src)); |
| 1863 |
FPU registers[reg] = fp_acos(src); |
| 1864 |
make_fpsr(FPU registers[reg]); |
| 1865 |
break; |
| 1866 |
case 0x1d: /* FCOS */ |
| 1867 |
fpu_debug(("FCOS %.04f\n",(double)src)); |
| 1868 |
FPU registers[reg] = fp_cos(src); |
| 1869 |
make_fpsr(FPU registers[reg]); |
| 1870 |
break; |
| 1871 |
case 0x1e: /* FGETEXP */ |
| 1872 |
fpu_debug(("FGETEXP %.04f\n",(double)src)); |
| 1873 |
if( isinf(src) ) { |
| 1874 |
make_nan( FPU registers[reg] ); |
| 1875 |
} |
| 1876 |
else { |
| 1877 |
FPU registers[reg] = fast_fgetexp( src ); |
| 1878 |
} |
| 1879 |
make_fpsr(FPU registers[reg]); |
| 1880 |
break; |
| 1881 |
case 0x1f: /* FGETMAN */ |
| 1882 |
fpu_debug(("FGETMAN %.04f\n",(double)src)); |
| 1883 |
if( src == 0 ) { |
| 1884 |
FPU registers[reg] = 0; |
| 1885 |
} |
| 1886 |
else if( isinf(src) ) { |
| 1887 |
make_nan( FPU registers[reg] ); |
| 1888 |
} |
| 1889 |
else { |
| 1890 |
FPU registers[reg] = src; |
| 1891 |
fast_remove_exponent( FPU registers[reg] ); |
| 1892 |
} |
| 1893 |
make_fpsr(FPU registers[reg]); |
| 1894 |
break; |
| 1895 |
case 0x20: /* FDIV */ |
| 1896 |
fpu_debug(("FDIV %.04f\n",(double)src)); |
| 1897 |
FPU registers[reg] /= src; |
| 1898 |
make_fpsr(FPU registers[reg]); |
| 1899 |
break; |
| 1900 |
case 0x21: /* FMOD */ |
| 1901 |
fpu_debug(("FMOD %.04f\n",(double)src)); |
| 1902 |
// FPU registers[reg] = FPU registers[reg] - (fpu_register) ((int) (FPU registers[reg] / src)) * src; |
| 1903 |
{ |
| 1904 |
fpu_register quot = fp_round_to_zero(FPU registers[reg] / src); |
| 1905 |
uae_u32 sign = get_quotient_sign(FPU registers[reg],src); |
| 1906 |
FPU registers[reg] = FPU registers[reg] - quot * src; |
| 1907 |
make_fpsr(FPU registers[reg]); |
| 1908 |
make_quotient(quot, sign); |
| 1909 |
} |
| 1910 |
break; |
| 1911 |
case 0x23: /* FMUL */ |
| 1912 |
fpu_debug(("FMUL %.04f\n",(double)src)); |
| 1913 |
get_dest_flags(FPU registers[reg]); |
| 1914 |
get_source_flags(src); |
| 1915 |
if(fl_dest.in_range && fl_source.in_range) { |
| 1916 |
FPU registers[reg] *= src; |
| 1917 |
} |
| 1918 |
else if (fl_dest.nan || fl_source.nan || |
| 1919 |
fl_dest.zero && fl_source.infinity || |
| 1920 |
fl_dest.infinity && fl_source.zero ) { |
| 1921 |
make_nan( FPU registers[reg] ); |
| 1922 |
} |
| 1923 |
else if (fl_dest.zero || fl_source.zero ) { |
| 1924 |
if (fl_dest.negative && !fl_source.negative || |
| 1925 |
!fl_dest.negative && fl_source.negative) { |
| 1926 |
make_zero_negative(FPU registers[reg]); |
| 1927 |
} |
| 1928 |
else { |
| 1929 |
make_zero_positive(FPU registers[reg]); |
| 1930 |
} |
| 1931 |
} |
| 1932 |
else { |
| 1933 |
if( fl_dest.negative && !fl_source.negative || |
| 1934 |
!fl_dest.negative && fl_source.negative) { |
| 1935 |
make_inf_negative(FPU registers[reg]); |
| 1936 |
} |
| 1937 |
else { |
| 1938 |
make_inf_positive(FPU registers[reg]); |
| 1939 |
} |
| 1940 |
} |
| 1941 |
make_fpsr(FPU registers[reg]); |
| 1942 |
break; |
| 1943 |
case 0x24: /* FSGLDIV */ |
| 1944 |
fpu_debug(("FSGLDIV %.04f\n",(double)src)); |
| 1945 |
FPU registers[reg] = (float)(FPU registers[reg] / src); |
| 1946 |
make_fpsr(FPU registers[reg]); |
| 1947 |
break; |
| 1948 |
case 0x25: /* FREM */ |
| 1949 |
fpu_debug(("FREM %.04f\n",(double)src)); |
| 1950 |
// FPU registers[reg] = FPU registers[reg] - (double) ((int) (FPU registers[reg] / src + 0.5)) * src; |
| 1951 |
{ |
| 1952 |
fpu_register quot = fp_round_to_nearest(FPU registers[reg] / src); |
| 1953 |
uae_u32 sign = get_quotient_sign(FPU registers[reg],src); |
| 1954 |
FPU registers[reg] = FPU registers[reg] - quot * src; |
| 1955 |
make_fpsr(FPU registers[reg]); |
| 1956 |
make_quotient(quot,sign); |
| 1957 |
} |
| 1958 |
break; |
| 1959 |
|
| 1960 |
case 0x26: /* FSCALE */ |
| 1961 |
fpu_debug(("FSCALE %.04f\n",(double)src)); |
| 1962 |
// TODO: overflow flags |
| 1963 |
get_dest_flags(FPU registers[reg]); |
| 1964 |
get_source_flags(src); |
| 1965 |
if (fl_source.in_range && fl_dest.in_range) { |
| 1966 |
// When the absolute value of the source operand is >= 2^14, |
| 1967 |
// an overflow or underflow always results. |
| 1968 |
// Here (int) cast is okay. |
| 1969 |
int scale_factor = (int)fp_round_to_zero(src); |
| 1970 |
#ifndef USE_LONG_DOUBLE |
| 1971 |
fp_declare_init_shape(sxp, FPU registers[reg], double); |
| 1972 |
uae_u32 exp = sxp->ieee.exponent + scale_factor; |
| 1973 |
if (exp < FP_EXTENDED_EXP_BIAS - FP_DOUBLE_EXP_BIAS) |
| 1974 |
exp = 0; |
| 1975 |
else if (exp > FP_EXTENDED_EXP_BIAS + FP_DOUBLE_EXP_BIAS) |
| 1976 |
exp = FP_DOUBLE_EXP_MAX; |
| 1977 |
else |
| 1978 |
exp += FP_DOUBLE_EXP_BIAS - FP_EXTENDED_EXP_BIAS; |
| 1979 |
sxp->ieee.exponent = exp; |
| 1980 |
#else |
| 1981 |
fp_declare_init_shape(sxp, FPU registers[reg], extended); |
| 1982 |
sxp->ieee.exponent += scale_factor; |
| 1983 |
#endif |
| 1984 |
} |
| 1985 |
else if (fl_source.infinity) { |
| 1986 |
// Returns NaN for any Infinity source |
| 1987 |
make_nan( FPU registers[reg] ); |
| 1988 |
} |
| 1989 |
make_fpsr(FPU registers[reg]); |
| 1990 |
break; |
| 1991 |
case 0x27: /* FSGLMUL */ |
| 1992 |
fpu_debug(("FSGLMUL %.04f\n",(double)src)); |
| 1993 |
FPU registers[reg] = (float)(FPU registers[reg] * src); |
| 1994 |
make_fpsr(FPU registers[reg]); |
| 1995 |
break; |
| 1996 |
case 0x28: /* FSUB */ |
| 1997 |
fpu_debug(("FSUB %.04f\n",(double)src)); |
| 1998 |
FPU registers[reg] -= src; |
| 1999 |
make_fpsr(FPU registers[reg]); |
| 2000 |
break; |
| 2001 |
case 0x22: /* FADD */ |
| 2002 |
fpu_debug(("FADD %.04f\n",(double)src)); |
| 2003 |
FPU registers[reg] += src; |
| 2004 |
make_fpsr(FPU registers[reg]); |
| 2005 |
break; |
| 2006 |
case 0x30: /* FSINCOS */ |
| 2007 |
case 0x31: |
| 2008 |
case 0x32: |
| 2009 |
case 0x33: |
| 2010 |
case 0x34: |
| 2011 |
case 0x35: |
| 2012 |
case 0x36: |
| 2013 |
case 0x37: |
| 2014 |
fpu_debug(("FSINCOS %.04f\n",(double)src)); |
| 2015 |
// Cosine must be calculated first if same register |
| 2016 |
FPU registers[extra & 7] = fp_cos(src); |
| 2017 |
FPU registers[reg] = fp_sin (src); |
| 2018 |
// Set FPU fpsr according to the sine result |
| 2019 |
make_fpsr(FPU registers[reg]); |
| 2020 |
break; |
| 2021 |
case 0x38: /* FCMP */ |
| 2022 |
fpu_debug(("FCMP %.04f\n",(double)src)); |
| 2023 |
set_fpsr(0); |
| 2024 |
make_fpsr(FPU registers[reg] - src); |
| 2025 |
break; |
| 2026 |
case 0x3a: /* FTST */ |
| 2027 |
fpu_debug(("FTST %.04f\n",(double)src)); |
| 2028 |
set_fpsr(0); |
| 2029 |
make_fpsr(src); |
| 2030 |
break; |
| 2031 |
default: |
| 2032 |
fpu_debug(("ILLEGAL F OP %X\n",opcode)); |
| 2033 |
m68k_setpc (m68k_getpc () - 4); |
| 2034 |
op_illg (opcode); |
| 2035 |
break; |
| 2036 |
} |
| 2037 |
fpu_debug(("END m68k_getpc()=%X\n",m68k_getpc())); |
| 2038 |
dump_registers( "END "); |
| 2039 |
return; |
| 2040 |
} |
| 2041 |
|
| 2042 |
fpu_debug(("ILLEGAL F OP 2 %X\n",opcode)); |
| 2043 |
m68k_setpc (m68k_getpc () - 4); |
| 2044 |
op_illg (opcode); |
| 2045 |
dump_registers( "END "); |
| 2046 |
} |
| 2047 |
|
| 2048 |
/* -------------------------- Initialization -------------------------- */ |
| 2049 |
|
| 2050 |
PRIVATE uae_u8 m_fpu_state_original[108]; // 90/94/108 |
| 2051 |
|
| 2052 |
PUBLIC void FFPU fpu_init (bool integral_68040) |
| 2053 |
{ |
| 2054 |
fpu_debug(("fpu_init\n")); |
| 2055 |
|
| 2056 |
static bool initialized_lookup_tables = false; |
| 2057 |
if (!initialized_lookup_tables) { |
| 2058 |
fpu_init_native_fflags(); |
| 2059 |
fpu_init_native_exceptions(); |
| 2060 |
fpu_init_native_accrued_exceptions(); |
| 2061 |
initialized_lookup_tables = true; |
| 2062 |
} |
| 2063 |
|
| 2064 |
FPU is_integral = integral_68040; |
| 2065 |
FPU instruction_address = 0; |
| 2066 |
FPU fpsr.quotient = 0; |
| 2067 |
set_fpcr(0); |
| 2068 |
set_fpsr(0); |
| 2069 |
|
| 2070 |
#if defined(FPU_USE_X86_ROUNDING) |
| 2071 |
// Initial state after boot, reset and frestore(null frame) |
| 2072 |
x86_control_word = CW_INITIAL; |
| 2073 |
#elif defined(__i386__) && defined(X86_ASSEMBLY) |
| 2074 |
volatile unsigned short int cw; |
| 2075 |
__asm__ __volatile__("fnstcw %0" : "=m" (cw)); |
| 2076 |
cw &= ~0x0300; cw |= 0x0300; // CW_PC_EXTENDED |
| 2077 |
cw &= ~0x0C00; cw |= 0x0000; // CW_RC_NEAR |
| 2078 |
__asm__ __volatile__("fldcw %0" : : "m" (cw)); |
| 2079 |
#endif |
| 2080 |
|
| 2081 |
FPU result = 1; |
| 2082 |
|
| 2083 |
for (int i = 0; i < 8; i++) |
| 2084 |
make_nan(FPU registers[i]); |
| 2085 |
} |
| 2086 |
|
| 2087 |
PUBLIC void FFPU fpu_exit (void) |
| 2088 |
{ |
| 2089 |
fpu_debug(("fpu_exit\n")); |
| 2090 |
} |
| 2091 |
|
| 2092 |
PUBLIC void FFPU fpu_reset (void) |
| 2093 |
{ |
| 2094 |
fpu_debug(("fpu_reset\n")); |
| 2095 |
fpu_exit(); |
| 2096 |
fpu_init(FPU is_integral); |
| 2097 |
} |
