| 1 |
/* |
| 2 |
* UAE - The Un*x Amiga Emulator |
| 3 |
* |
| 4 |
* MC68881 emulation |
| 5 |
* |
| 6 |
* Copyright 1996 Herman ten Brugge |
| 7 |
*/ |
| 8 |
|
| 9 |
#include <math.h> |
| 10 |
#include <stdio.h> |
| 11 |
|
| 12 |
#include "sysdeps.h" |
| 13 |
|
| 14 |
#include "memory.h" |
| 15 |
#include "readcpu.h" |
| 16 |
#include "newcpu.h" |
| 17 |
|
| 18 |
#if 1 |
| 19 |
|
| 20 |
#define DEBUG_FPP 0 |
| 21 |
|
| 22 |
/* single : S 8*E 23*F */ |
| 23 |
/* double : S 11*E 52*F */ |
| 24 |
/* extended : S 15*E 64*F */ |
| 25 |
/* E = 0 & F = 0 -> 0 */ |
| 26 |
/* E = MAX & F = 0 -> Infin */ |
| 27 |
/* E = MAX & F # 0 -> NotANumber */ |
| 28 |
/* E = biased by 127 (single) ,1023 (double) ,16383 (extended) */ |
| 29 |
|
| 30 |
static __inline__ double to_single (uae_u32 value) |
| 31 |
{ |
| 32 |
double frac; |
| 33 |
|
| 34 |
if ((value & 0x7fffffff) == 0) |
| 35 |
return (0.0); |
| 36 |
frac = (double) ((value & 0x7fffff) | 0x800000) / 8388608.0; |
| 37 |
if (value & 0x80000000) |
| 38 |
frac = -frac; |
| 39 |
return (ldexp (frac, ((value >> 23) & 0xff) - 127)); |
| 40 |
} |
| 41 |
|
| 42 |
static __inline__ uae_u32 from_single (double src) |
| 43 |
{ |
| 44 |
int expon; |
| 45 |
uae_u32 tmp; |
| 46 |
double frac; |
| 47 |
|
| 48 |
if (src == 0.0) |
| 49 |
return 0; |
| 50 |
if (src < 0) { |
| 51 |
tmp = 0x80000000; |
| 52 |
src = -src; |
| 53 |
} else { |
| 54 |
tmp = 0; |
| 55 |
} |
| 56 |
frac = frexp (src, &expon); |
| 57 |
frac += 0.5 / 16777216.0; |
| 58 |
if (frac >= 1.0) { |
| 59 |
frac /= 2.0; |
| 60 |
expon++; |
| 61 |
} |
| 62 |
return (tmp | (((expon + 127 - 1) & 0xff) << 23) | |
| 63 |
(((int) (frac * 16777216.0)) & 0x7fffff)); |
| 64 |
} |
| 65 |
|
| 66 |
static __inline__ double to_exten(uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3) |
| 67 |
{ |
| 68 |
double frac; |
| 69 |
|
| 70 |
if ((wrd1 & 0x7fff0000) == 0 && wrd2 == 0 && wrd3 == 0) |
| 71 |
return 0.0; |
| 72 |
frac = (double) wrd2 / 2147483648.0 + |
| 73 |
(double) wrd3 / 9223372036854775808.0; |
| 74 |
if (wrd1 & 0x80000000) |
| 75 |
frac = -frac; |
| 76 |
return ldexp (frac, ((wrd1 >> 16) & 0x7fff) - 16383); |
| 77 |
} |
| 78 |
|
| 79 |
static __inline__ void from_exten(double src, uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3) |
| 80 |
{ |
| 81 |
int expon; |
| 82 |
double frac; |
| 83 |
|
| 84 |
if (src == 0.0) { |
| 85 |
*wrd1 = 0; |
| 86 |
*wrd2 = 0; |
| 87 |
*wrd3 = 0; |
| 88 |
return; |
| 89 |
} |
| 90 |
if (src < 0) { |
| 91 |
*wrd1 = 0x80000000; |
| 92 |
src = -src; |
| 93 |
} else { |
| 94 |
*wrd1 = 0; |
| 95 |
} |
| 96 |
frac = frexp (src, &expon); |
| 97 |
frac += 0.5 / 18446744073709551616.0; |
| 98 |
if (frac >= 1.0) { |
| 99 |
frac /= 2.0; |
| 100 |
expon++; |
| 101 |
} |
| 102 |
*wrd1 |= (((expon + 16383 - 1) & 0x7fff) << 16); |
| 103 |
*wrd2 = (uae_u32) (frac * 4294967296.0); |
| 104 |
*wrd3 = (uae_u32) (frac * 18446744073709551616.0 - *wrd2 * 4294967296.0); |
| 105 |
} |
| 106 |
|
| 107 |
static __inline__ double to_double(uae_u32 wrd1, uae_u32 wrd2) |
| 108 |
{ |
| 109 |
double frac; |
| 110 |
|
| 111 |
if ((wrd1 & 0x7fffffff) == 0 && wrd2 == 0) |
| 112 |
return 0.0; |
| 113 |
frac = (double) ((wrd1 & 0xfffff) | 0x100000) / 1048576.0 + |
| 114 |
(double) wrd2 / 4503599627370496.0; |
| 115 |
if (wrd1 & 0x80000000) |
| 116 |
frac = -frac; |
| 117 |
return ldexp (frac, ((wrd1 >> 20) & 0x7ff) - 1023); |
| 118 |
} |
| 119 |
|
| 120 |
static __inline__ void from_double(double src, uae_u32 * wrd1, uae_u32 * wrd2) |
| 121 |
{ |
| 122 |
int expon; |
| 123 |
int tmp; |
| 124 |
double frac; |
| 125 |
|
| 126 |
if (src == 0.0) { |
| 127 |
*wrd1 = 0; |
| 128 |
*wrd2 = 0; |
| 129 |
return; |
| 130 |
} |
| 131 |
if (src < 0) { |
| 132 |
*wrd1 = 0x80000000; |
| 133 |
src = -src; |
| 134 |
} else { |
| 135 |
*wrd1 = 0; |
| 136 |
} |
| 137 |
frac = frexp (src, &expon); |
| 138 |
frac += 0.5 / 9007199254740992.0; |
| 139 |
if (frac >= 1.0) { |
| 140 |
frac /= 2.0; |
| 141 |
expon++; |
| 142 |
} |
| 143 |
tmp = (uae_u32) (frac * 2097152.0); |
| 144 |
*wrd1 |= (((expon + 1023 - 1) & 0x7ff) << 20) | (tmp & 0xfffff); |
| 145 |
*wrd2 = (uae_u32) (frac * 9007199254740992.0 - tmp * 4294967296.0); |
| 146 |
} |
| 147 |
|
| 148 |
static __inline__ double to_pack(uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3) |
| 149 |
{ |
| 150 |
double d; |
| 151 |
char *cp; |
| 152 |
char str[100]; |
| 153 |
|
| 154 |
cp = str; |
| 155 |
if (wrd1 & 0x80000000) |
| 156 |
*cp++ = '-'; |
| 157 |
*cp++ = (wrd1 & 0xf) + '0'; |
| 158 |
*cp++ = '.'; |
| 159 |
*cp++ = ((wrd2 >> 28) & 0xf) + '0'; |
| 160 |
*cp++ = ((wrd2 >> 24) & 0xf) + '0'; |
| 161 |
*cp++ = ((wrd2 >> 20) & 0xf) + '0'; |
| 162 |
*cp++ = ((wrd2 >> 16) & 0xf) + '0'; |
| 163 |
*cp++ = ((wrd2 >> 12) & 0xf) + '0'; |
| 164 |
*cp++ = ((wrd2 >> 8) & 0xf) + '0'; |
| 165 |
*cp++ = ((wrd2 >> 4) & 0xf) + '0'; |
| 166 |
*cp++ = ((wrd2 >> 0) & 0xf) + '0'; |
| 167 |
*cp++ = ((wrd3 >> 28) & 0xf) + '0'; |
| 168 |
*cp++ = ((wrd3 >> 24) & 0xf) + '0'; |
| 169 |
*cp++ = ((wrd3 >> 20) & 0xf) + '0'; |
| 170 |
*cp++ = ((wrd3 >> 16) & 0xf) + '0'; |
| 171 |
*cp++ = ((wrd3 >> 12) & 0xf) + '0'; |
| 172 |
*cp++ = ((wrd3 >> 8) & 0xf) + '0'; |
| 173 |
*cp++ = ((wrd3 >> 4) & 0xf) + '0'; |
| 174 |
*cp++ = ((wrd3 >> 0) & 0xf) + '0'; |
| 175 |
*cp++ = 'E'; |
| 176 |
if (wrd1 & 0x40000000) |
| 177 |
*cp++ = '-'; |
| 178 |
*cp++ = ((wrd1 >> 24) & 0xf) + '0'; |
| 179 |
*cp++ = ((wrd1 >> 20) & 0xf) + '0'; |
| 180 |
*cp++ = ((wrd1 >> 16) & 0xf) + '0'; |
| 181 |
*cp = 0; |
| 182 |
sscanf(str, "%le", &d); |
| 183 |
return d; |
| 184 |
} |
| 185 |
|
| 186 |
static __inline__ void from_pack(double src, uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3) |
| 187 |
{ |
| 188 |
int i; |
| 189 |
int t; |
| 190 |
char *cp; |
| 191 |
char str[100]; |
| 192 |
|
| 193 |
sprintf(str, "%.16e", src); |
| 194 |
cp = str; |
| 195 |
*wrd1 = *wrd2 = *wrd3 = 0; |
| 196 |
if (*cp == '-') { |
| 197 |
cp++; |
| 198 |
*wrd1 = 0x80000000; |
| 199 |
} |
| 200 |
if (*cp == '+') |
| 201 |
cp++; |
| 202 |
*wrd1 |= (*cp++ - '0'); |
| 203 |
if (*cp == '.') |
| 204 |
cp++; |
| 205 |
for (i = 0; i < 8; i++) { |
| 206 |
*wrd2 <<= 4; |
| 207 |
if (*cp >= '0' && *cp <= '9') |
| 208 |
*wrd2 |= *cp++ - '0'; |
| 209 |
} |
| 210 |
for (i = 0; i < 8; i++) { |
| 211 |
*wrd3 <<= 4; |
| 212 |
if (*cp >= '0' && *cp <= '9') |
| 213 |
*wrd3 |= *cp++ - '0'; |
| 214 |
} |
| 215 |
if (*cp == 'e' || *cp == 'E') { |
| 216 |
cp++; |
| 217 |
if (*cp == '-') { |
| 218 |
cp++; |
| 219 |
*wrd1 |= 0x40000000; |
| 220 |
} |
| 221 |
if (*cp == '+') |
| 222 |
cp++; |
| 223 |
t = 0; |
| 224 |
for (i = 0; i < 3; i++) { |
| 225 |
if (*cp >= '0' && *cp <= '9') |
| 226 |
t = (t << 4) | (*cp++ - '0'); |
| 227 |
} |
| 228 |
*wrd1 |= t << 16; |
| 229 |
} |
| 230 |
} |
| 231 |
|
| 232 |
static __inline__ int get_fp_value (uae_u32 opcode, uae_u16 extra, double *src) |
| 233 |
{ |
| 234 |
uaecptr tmppc; |
| 235 |
uae_u16 tmp; |
| 236 |
int size; |
| 237 |
int mode; |
| 238 |
int reg; |
| 239 |
uae_u32 ad = 0; |
| 240 |
static int sz1[8] = |
| 241 |
{4, 4, 12, 12, 2, 8, 1, 0}; |
| 242 |
static int sz2[8] = |
| 243 |
{4, 4, 12, 12, 2, 8, 2, 0}; |
| 244 |
|
| 245 |
if ((extra & 0x4000) == 0) { |
| 246 |
*src = regs.fp[(extra >> 10) & 7]; |
| 247 |
return 1; |
| 248 |
} |
| 249 |
mode = (opcode >> 3) & 7; |
| 250 |
reg = opcode & 7; |
| 251 |
size = (extra >> 10) & 7; |
| 252 |
switch (mode) { |
| 253 |
case 0: |
| 254 |
switch (size) { |
| 255 |
case 6: |
| 256 |
*src = (double) (uae_s8) m68k_dreg (regs, reg); |
| 257 |
break; |
| 258 |
case 4: |
| 259 |
*src = (double) (uae_s16) m68k_dreg (regs, reg); |
| 260 |
break; |
| 261 |
case 0: |
| 262 |
*src = (double) (uae_s32) m68k_dreg (regs, reg); |
| 263 |
break; |
| 264 |
case 1: |
| 265 |
*src = to_single(m68k_dreg (regs, reg)); |
| 266 |
break; |
| 267 |
default: |
| 268 |
return 0; |
| 269 |
} |
| 270 |
return 1; |
| 271 |
case 1: |
| 272 |
return 0; |
| 273 |
case 2: |
| 274 |
ad = m68k_areg (regs, reg); |
| 275 |
break; |
| 276 |
case 3: |
| 277 |
ad = m68k_areg (regs, reg); |
| 278 |
m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size]; |
| 279 |
break; |
| 280 |
case 4: |
| 281 |
m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size]; |
| 282 |
ad = m68k_areg (regs, reg); |
| 283 |
break; |
| 284 |
case 5: |
| 285 |
ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword(); |
| 286 |
break; |
| 287 |
case 6: |
| 288 |
ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword()); |
| 289 |
break; |
| 290 |
case 7: |
| 291 |
switch (reg) { |
| 292 |
case 0: |
| 293 |
ad = (uae_s32) (uae_s16) next_iword(); |
| 294 |
break; |
| 295 |
case 1: |
| 296 |
ad = next_ilong(); |
| 297 |
break; |
| 298 |
case 2: |
| 299 |
ad = m68k_getpc (); |
| 300 |
ad += (uae_s32) (uae_s16) next_iword(); |
| 301 |
break; |
| 302 |
case 3: |
| 303 |
tmppc = m68k_getpc (); |
| 304 |
tmp = next_iword(); |
| 305 |
ad = get_disp_ea_020 (tmppc, tmp); |
| 306 |
break; |
| 307 |
case 4: |
| 308 |
ad = m68k_getpc (); |
| 309 |
m68k_setpc (ad + sz2[size]); |
| 310 |
break; |
| 311 |
default: |
| 312 |
return 0; |
| 313 |
} |
| 314 |
} |
| 315 |
switch (size) { |
| 316 |
case 0: |
| 317 |
*src = (double) (uae_s32) get_long (ad); |
| 318 |
break; |
| 319 |
case 1: |
| 320 |
*src = to_single(get_long (ad)); |
| 321 |
break; |
| 322 |
case 2:{ |
| 323 |
uae_u32 wrd1, wrd2, wrd3; |
| 324 |
wrd1 = get_long (ad); |
| 325 |
ad += 4; |
| 326 |
wrd2 = get_long (ad); |
| 327 |
ad += 4; |
| 328 |
wrd3 = get_long (ad); |
| 329 |
*src = to_exten(wrd1, wrd2, wrd3); |
| 330 |
} |
| 331 |
break; |
| 332 |
case 3:{ |
| 333 |
uae_u32 wrd1, wrd2, wrd3; |
| 334 |
wrd1 = get_long (ad); |
| 335 |
ad += 4; |
| 336 |
wrd2 = get_long (ad); |
| 337 |
ad += 4; |
| 338 |
wrd3 = get_long (ad); |
| 339 |
*src = to_pack(wrd1, wrd2, wrd3); |
| 340 |
} |
| 341 |
break; |
| 342 |
case 4: |
| 343 |
*src = (double) (uae_s16) get_word(ad); |
| 344 |
break; |
| 345 |
case 5:{ |
| 346 |
uae_u32 wrd1, wrd2; |
| 347 |
wrd1 = get_long (ad); |
| 348 |
ad += 4; |
| 349 |
wrd2 = get_long (ad); |
| 350 |
*src = to_double(wrd1, wrd2); |
| 351 |
} |
| 352 |
break; |
| 353 |
case 6: |
| 354 |
*src = (double) (uae_s8) get_byte(ad); |
| 355 |
break; |
| 356 |
default: |
| 357 |
return 0; |
| 358 |
} |
| 359 |
return 1; |
| 360 |
} |
| 361 |
|
| 362 |
static __inline__ int put_fp_value (double value, uae_u32 opcode, uae_u16 extra) |
| 363 |
{ |
| 364 |
uae_u16 tmp; |
| 365 |
uaecptr tmppc; |
| 366 |
int size; |
| 367 |
int mode; |
| 368 |
int reg; |
| 369 |
uae_u32 ad; |
| 370 |
static int sz1[8] = |
| 371 |
{4, 4, 12, 12, 2, 8, 1, 0}; |
| 372 |
static int sz2[8] = |
| 373 |
{4, 4, 12, 12, 2, 8, 2, 0}; |
| 374 |
|
| 375 |
if ((extra & 0x4000) == 0) { |
| 376 |
regs.fp[(extra >> 10) & 7] = value; |
| 377 |
return 1; |
| 378 |
} |
| 379 |
mode = (opcode >> 3) & 7; |
| 380 |
reg = opcode & 7; |
| 381 |
size = (extra >> 10) & 7; |
| 382 |
ad = 0xffffffff; |
| 383 |
switch (mode) { |
| 384 |
case 0: |
| 385 |
switch (size) { |
| 386 |
case 6: |
| 387 |
m68k_dreg (regs, reg) = (((int) value & 0xff) |
| 388 |
| (m68k_dreg (regs, reg) & ~0xff)); |
| 389 |
break; |
| 390 |
case 4: |
| 391 |
m68k_dreg (regs, reg) = (((int) value & 0xffff) |
| 392 |
| (m68k_dreg (regs, reg) & ~0xffff)); |
| 393 |
break; |
| 394 |
case 0: |
| 395 |
m68k_dreg (regs, reg) = (int) value; |
| 396 |
break; |
| 397 |
case 1: |
| 398 |
m68k_dreg (regs, reg) = from_single(value); |
| 399 |
break; |
| 400 |
default: |
| 401 |
return 0; |
| 402 |
} |
| 403 |
return 1; |
| 404 |
case 1: |
| 405 |
return 0; |
| 406 |
case 2: |
| 407 |
ad = m68k_areg (regs, reg); |
| 408 |
break; |
| 409 |
case 3: |
| 410 |
ad = m68k_areg (regs, reg); |
| 411 |
m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size]; |
| 412 |
break; |
| 413 |
case 4: |
| 414 |
m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size]; |
| 415 |
ad = m68k_areg (regs, reg); |
| 416 |
break; |
| 417 |
case 5: |
| 418 |
ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword(); |
| 419 |
break; |
| 420 |
case 6: |
| 421 |
ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword()); |
| 422 |
break; |
| 423 |
case 7: |
| 424 |
switch (reg) { |
| 425 |
case 0: |
| 426 |
ad = (uae_s32) (uae_s16) next_iword(); |
| 427 |
break; |
| 428 |
case 1: |
| 429 |
ad = next_ilong(); |
| 430 |
break; |
| 431 |
case 2: |
| 432 |
ad = m68k_getpc (); |
| 433 |
ad += (uae_s32) (uae_s16) next_iword(); |
| 434 |
break; |
| 435 |
case 3: |
| 436 |
tmppc = m68k_getpc (); |
| 437 |
tmp = next_iword(); |
| 438 |
ad = get_disp_ea_020 (tmppc, tmp); |
| 439 |
break; |
| 440 |
case 4: |
| 441 |
ad = m68k_getpc (); |
| 442 |
m68k_setpc (ad + sz2[size]); |
| 443 |
break; |
| 444 |
default: |
| 445 |
return 0; |
| 446 |
} |
| 447 |
} |
| 448 |
switch (size) { |
| 449 |
case 0: |
| 450 |
put_long (ad, (uae_s32) value); |
| 451 |
break; |
| 452 |
case 1: |
| 453 |
put_long (ad, from_single(value)); |
| 454 |
break; |
| 455 |
case 2: |
| 456 |
{ |
| 457 |
uae_u32 wrd1, wrd2, wrd3; |
| 458 |
from_exten(value, &wrd1, &wrd2, &wrd3); |
| 459 |
put_long (ad, wrd1); |
| 460 |
ad += 4; |
| 461 |
put_long (ad, wrd2); |
| 462 |
ad += 4; |
| 463 |
put_long (ad, wrd3); |
| 464 |
} |
| 465 |
break; |
| 466 |
case 3: |
| 467 |
{ |
| 468 |
uae_u32 wrd1, wrd2, wrd3; |
| 469 |
from_pack(value, &wrd1, &wrd2, &wrd3); |
| 470 |
put_long (ad, wrd1); |
| 471 |
ad += 4; |
| 472 |
put_long (ad, wrd2); |
| 473 |
ad += 4; |
| 474 |
put_long (ad, wrd3); |
| 475 |
} |
| 476 |
break; |
| 477 |
case 4: |
| 478 |
put_word(ad, (uae_s16) value); |
| 479 |
break; |
| 480 |
case 5:{ |
| 481 |
uae_u32 wrd1, wrd2; |
| 482 |
from_double(value, &wrd1, &wrd2); |
| 483 |
put_long (ad, wrd1); |
| 484 |
ad += 4; |
| 485 |
put_long (ad, wrd2); |
| 486 |
} |
| 487 |
break; |
| 488 |
case 6: |
| 489 |
put_byte(ad, (uae_s8) value); |
| 490 |
break; |
| 491 |
default: |
| 492 |
return 0; |
| 493 |
} |
| 494 |
return 1; |
| 495 |
} |
| 496 |
|
| 497 |
static __inline__ int get_fp_ad(uae_u32 opcode, uae_u32 * ad) |
| 498 |
{ |
| 499 |
uae_u16 tmp; |
| 500 |
uaecptr tmppc; |
| 501 |
int mode; |
| 502 |
int reg; |
| 503 |
|
| 504 |
mode = (opcode >> 3) & 7; |
| 505 |
reg = opcode & 7; |
| 506 |
switch (mode) { |
| 507 |
case 0: |
| 508 |
case 1: |
| 509 |
return 0; |
| 510 |
case 2: |
| 511 |
*ad = m68k_areg (regs, reg); |
| 512 |
break; |
| 513 |
case 3: |
| 514 |
*ad = m68k_areg (regs, reg); |
| 515 |
break; |
| 516 |
case 4: |
| 517 |
*ad = m68k_areg (regs, reg); |
| 518 |
break; |
| 519 |
case 5: |
| 520 |
*ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) next_iword(); |
| 521 |
break; |
| 522 |
case 6: |
| 523 |
*ad = get_disp_ea_020 (m68k_areg (regs, reg), next_iword()); |
| 524 |
break; |
| 525 |
case 7: |
| 526 |
switch (reg) { |
| 527 |
case 0: |
| 528 |
*ad = (uae_s32) (uae_s16) next_iword(); |
| 529 |
break; |
| 530 |
case 1: |
| 531 |
*ad = next_ilong(); |
| 532 |
break; |
| 533 |
case 2: |
| 534 |
*ad = m68k_getpc (); |
| 535 |
*ad += (uae_s32) (uae_s16) next_iword(); |
| 536 |
break; |
| 537 |
case 3: |
| 538 |
tmppc = m68k_getpc (); |
| 539 |
tmp = next_iword(); |
| 540 |
*ad = get_disp_ea_020 (tmppc, tmp); |
| 541 |
break; |
| 542 |
default: |
| 543 |
return 0; |
| 544 |
} |
| 545 |
} |
| 546 |
return 1; |
| 547 |
} |
| 548 |
|
| 549 |
static __inline__ int fpp_cond(uae_u32 opcode, int contition) |
| 550 |
{ |
| 551 |
int N = (regs.fpsr & 0x8000000) != 0; |
| 552 |
int Z = (regs.fpsr & 0x4000000) != 0; |
| 553 |
/* int I = (regs.fpsr & 0x2000000) != 0; */ |
| 554 |
int NotANumber = (regs.fpsr & 0x1000000) != 0; |
| 555 |
|
| 556 |
switch (contition) { |
| 557 |
case 0x00: |
| 558 |
return 0; |
| 559 |
case 0x01: |
| 560 |
return Z; |
| 561 |
case 0x02: |
| 562 |
return !(NotANumber || Z || N); |
| 563 |
case 0x03: |
| 564 |
return Z || !(NotANumber || N); |
| 565 |
case 0x04: |
| 566 |
return N && !(NotANumber || Z); |
| 567 |
case 0x05: |
| 568 |
return Z || (N && !NotANumber); |
| 569 |
case 0x06: |
| 570 |
return !(NotANumber || Z); |
| 571 |
case 0x07: |
| 572 |
return !NotANumber; |
| 573 |
case 0x08: |
| 574 |
return NotANumber; |
| 575 |
case 0x09: |
| 576 |
return NotANumber || Z; |
| 577 |
case 0x0a: |
| 578 |
return NotANumber || !(N || Z); |
| 579 |
case 0x0b: |
| 580 |
return NotANumber || Z || !N; |
| 581 |
case 0x0c: |
| 582 |
return NotANumber || (N && !Z); |
| 583 |
case 0x0d: |
| 584 |
return NotANumber || Z || N; |
| 585 |
case 0x0e: |
| 586 |
return !Z; |
| 587 |
case 0x0f: |
| 588 |
return 1; |
| 589 |
case 0x10: |
| 590 |
return 0; |
| 591 |
case 0x11: |
| 592 |
return Z; |
| 593 |
case 0x12: |
| 594 |
return !(NotANumber || Z || N); |
| 595 |
case 0x13: |
| 596 |
return Z || !(NotANumber || N); |
| 597 |
case 0x14: |
| 598 |
return N && !(NotANumber || Z); |
| 599 |
case 0x15: |
| 600 |
return Z || (N && !NotANumber); |
| 601 |
case 0x16: |
| 602 |
return !(NotANumber || Z); |
| 603 |
case 0x17: |
| 604 |
return !NotANumber; |
| 605 |
case 0x18: |
| 606 |
return NotANumber; |
| 607 |
case 0x19: |
| 608 |
return NotANumber || Z; |
| 609 |
case 0x1a: |
| 610 |
return NotANumber || !(N || Z); |
| 611 |
case 0x1b: |
| 612 |
return NotANumber || Z || !N; |
| 613 |
case 0x1c: |
| 614 |
return NotANumber || (Z && N); |
| 615 |
case 0x1d: |
| 616 |
return NotANumber || Z || N; |
| 617 |
case 0x1e: |
| 618 |
return !Z; |
| 619 |
case 0x1f: |
| 620 |
return 1; |
| 621 |
} |
| 622 |
return -1; |
| 623 |
} |
| 624 |
|
| 625 |
void fdbcc_opp(uae_u32 opcode, uae_u16 extra) |
| 626 |
{ |
| 627 |
uaecptr pc = (uae_u32) m68k_getpc (); |
| 628 |
uae_s32 disp = (uae_s32) (uae_s16) next_iword(); |
| 629 |
int cc; |
| 630 |
|
| 631 |
#if DEBUG_FPP |
| 632 |
printf("fdbcc_opp at %08lx\n", m68k_getpc ()); |
| 633 |
fflush(stdout); |
| 634 |
#endif |
| 635 |
cc = fpp_cond(opcode, extra & 0x3f); |
| 636 |
if (cc == -1) { |
| 637 |
m68k_setpc (pc - 4); |
| 638 |
op_illg (opcode); |
| 639 |
} else if (!cc) { |
| 640 |
int reg = opcode & 0x7; |
| 641 |
|
| 642 |
m68k_dreg (regs, reg) = ((m68k_dreg (regs, reg) & ~0xffff) |
| 643 |
| ((m68k_dreg (regs, reg) - 1) & 0xffff)); |
| 644 |
if ((m68k_dreg (regs, reg) & 0xffff) == 0xffff) |
| 645 |
m68k_setpc (pc + disp); |
| 646 |
} |
| 647 |
} |
| 648 |
|
| 649 |
void fscc_opp(uae_u32 opcode, uae_u16 extra) |
| 650 |
{ |
| 651 |
uae_u32 ad; |
| 652 |
int cc; |
| 653 |
|
| 654 |
#if DEBUG_FPP |
| 655 |
printf("fscc_opp at %08lx\n", m68k_getpc ()); |
| 656 |
fflush(stdout); |
| 657 |
#endif |
| 658 |
cc = fpp_cond(opcode, extra & 0x3f); |
| 659 |
if (cc == -1) { |
| 660 |
m68k_setpc (m68k_getpc () - 4); |
| 661 |
op_illg (opcode); |
| 662 |
} else if ((opcode & 0x38) == 0) { |
| 663 |
m68k_dreg (regs, opcode & 7) = (m68k_dreg (regs, opcode & 7) & ~0xff) | |
| 664 |
(cc ? 0xff : 0x00); |
| 665 |
} else { |
| 666 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 667 |
m68k_setpc (m68k_getpc () - 4); |
| 668 |
op_illg (opcode); |
| 669 |
} else |
| 670 |
put_byte(ad, cc ? 0xff : 0x00); |
| 671 |
} |
| 672 |
} |
| 673 |
|
| 674 |
void ftrapcc_opp(uae_u32 opcode, uaecptr oldpc) |
| 675 |
{ |
| 676 |
int cc; |
| 677 |
|
| 678 |
#if DEBUG_FPP |
| 679 |
printf("ftrapcc_opp at %08lx\n", m68k_getpc ()); |
| 680 |
fflush(stdout); |
| 681 |
#endif |
| 682 |
cc = fpp_cond(opcode, opcode & 0x3f); |
| 683 |
if (cc == -1) { |
| 684 |
m68k_setpc (oldpc); |
| 685 |
op_illg (opcode); |
| 686 |
} |
| 687 |
if (cc) |
| 688 |
Exception(7, oldpc - 2); |
| 689 |
} |
| 690 |
|
| 691 |
void fbcc_opp(uae_u32 opcode, uaecptr pc, uae_u32 extra) |
| 692 |
{ |
| 693 |
int cc; |
| 694 |
|
| 695 |
#if DEBUG_FPP |
| 696 |
printf("fbcc_opp at %08lx\n", m68k_getpc ()); |
| 697 |
fflush(stdout); |
| 698 |
#endif |
| 699 |
cc = fpp_cond(opcode, opcode & 0x3f); |
| 700 |
if (cc == -1) { |
| 701 |
m68k_setpc (pc); |
| 702 |
op_illg (opcode); |
| 703 |
} else if (cc) { |
| 704 |
if ((opcode & 0x40) == 0) |
| 705 |
extra = (uae_s32) (uae_s16) extra; |
| 706 |
m68k_setpc (pc + extra); |
| 707 |
} |
| 708 |
} |
| 709 |
|
| 710 |
void fsave_opp(uae_u32 opcode) |
| 711 |
{ |
| 712 |
uae_u32 ad; |
| 713 |
int incr = (opcode & 0x38) == 0x20 ? -1 : 1; |
| 714 |
int i; |
| 715 |
|
| 716 |
#if DEBUG_FPP |
| 717 |
printf("fsave_opp at %08lx\n", m68k_getpc ()); |
| 718 |
fflush(stdout); |
| 719 |
#endif |
| 720 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 721 |
m68k_setpc (m68k_getpc () - 2); |
| 722 |
op_illg (opcode); |
| 723 |
return; |
| 724 |
} |
| 725 |
if (incr < 0) { |
| 726 |
ad -= 4; |
| 727 |
put_long (ad, 0x70000000); |
| 728 |
for (i = 0; i < 5; i++) { |
| 729 |
ad -= 4; |
| 730 |
put_long (ad, 0x00000000); |
| 731 |
} |
| 732 |
ad -= 4; |
| 733 |
put_long (ad, 0x1f180000); |
| 734 |
} else { |
| 735 |
put_long (ad, 0x1f180000); |
| 736 |
ad += 4; |
| 737 |
for (i = 0; i < 5; i++) { |
| 738 |
put_long (ad, 0x00000000); |
| 739 |
ad += 4; |
| 740 |
} |
| 741 |
put_long (ad, 0x70000000); |
| 742 |
ad += 4; |
| 743 |
} |
| 744 |
if ((opcode & 0x38) == 0x18) |
| 745 |
m68k_areg (regs, opcode & 7) = ad; |
| 746 |
if ((opcode & 0x38) == 0x20) |
| 747 |
m68k_areg (regs, opcode & 7) = ad; |
| 748 |
} |
| 749 |
|
| 750 |
void frestore_opp(uae_u32 opcode) |
| 751 |
{ |
| 752 |
uae_u32 ad; |
| 753 |
uae_u32 d; |
| 754 |
int incr = (opcode & 0x38) == 0x20 ? -1 : 1; |
| 755 |
|
| 756 |
#if DEBUG_FPP |
| 757 |
printf("frestore_opp at %08lx\n", m68k_getpc ()); |
| 758 |
fflush(stdout); |
| 759 |
#endif |
| 760 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 761 |
m68k_setpc (m68k_getpc () - 2); |
| 762 |
op_illg (opcode); |
| 763 |
return; |
| 764 |
} |
| 765 |
if (incr < 0) { |
| 766 |
ad -= 4; |
| 767 |
d = get_long (ad); |
| 768 |
if ((d & 0xff000000) != 0) { |
| 769 |
if ((d & 0x00ff0000) == 0x00180000) |
| 770 |
ad -= 6 * 4; |
| 771 |
else if ((d & 0x00ff0000) == 0x00380000) |
| 772 |
ad -= 14 * 4; |
| 773 |
else if ((d & 0x00ff0000) == 0x00b40000) |
| 774 |
ad -= 45 * 4; |
| 775 |
} |
| 776 |
} else { |
| 777 |
d = get_long (ad); |
| 778 |
ad += 4; |
| 779 |
if ((d & 0xff000000) != 0) { |
| 780 |
if ((d & 0x00ff0000) == 0x00180000) |
| 781 |
ad += 6 * 4; |
| 782 |
else if ((d & 0x00ff0000) == 0x00380000) |
| 783 |
ad += 14 * 4; |
| 784 |
else if ((d & 0x00ff0000) == 0x00b40000) |
| 785 |
ad += 45 * 4; |
| 786 |
} |
| 787 |
} |
| 788 |
if ((opcode & 0x38) == 0x18) |
| 789 |
m68k_areg (regs, opcode & 7) = ad; |
| 790 |
if ((opcode & 0x38) == 0x20) |
| 791 |
m68k_areg (regs, opcode & 7) = ad; |
| 792 |
} |
| 793 |
|
| 794 |
void fpp_opp(uae_u32 opcode, uae_u16 extra) |
| 795 |
{ |
| 796 |
int reg; |
| 797 |
double src; |
| 798 |
|
| 799 |
#if DEBUG_FPP |
| 800 |
printf("FPP %04lx %04x at %08lx\n", opcode & 0xffff, extra & 0xffff, |
| 801 |
m68k_getpc () - 4); |
| 802 |
fflush(stdout); |
| 803 |
#endif |
| 804 |
switch ((extra >> 13) & 0x7) { |
| 805 |
case 3: |
| 806 |
if (put_fp_value (regs.fp[(extra >> 7) & 7], opcode, extra) == 0) { |
| 807 |
m68k_setpc (m68k_getpc () - 4); |
| 808 |
op_illg (opcode); |
| 809 |
} |
| 810 |
return; |
| 811 |
case 4: |
| 812 |
case 5: |
| 813 |
if ((opcode & 0x38) == 0) { |
| 814 |
if (extra & 0x2000) { |
| 815 |
if (extra & 0x1000) |
| 816 |
m68k_dreg (regs, opcode & 7) = regs.fpcr; |
| 817 |
if (extra & 0x0800) |
| 818 |
m68k_dreg (regs, opcode & 7) = regs.fpsr; |
| 819 |
if (extra & 0x0400) |
| 820 |
m68k_dreg (regs, opcode & 7) = regs.fpiar; |
| 821 |
} else { |
| 822 |
if (extra & 0x1000) |
| 823 |
regs.fpcr = m68k_dreg (regs, opcode & 7); |
| 824 |
if (extra & 0x0800) |
| 825 |
regs.fpsr = m68k_dreg (regs, opcode & 7); |
| 826 |
if (extra & 0x0400) |
| 827 |
regs.fpiar = m68k_dreg (regs, opcode & 7); |
| 828 |
} |
| 829 |
} else if ((opcode & 0x38) == 1) { |
| 830 |
if (extra & 0x2000) { |
| 831 |
if (extra & 0x1000) |
| 832 |
m68k_areg (regs, opcode & 7) = regs.fpcr; |
| 833 |
if (extra & 0x0800) |
| 834 |
m68k_areg (regs, opcode & 7) = regs.fpsr; |
| 835 |
if (extra & 0x0400) |
| 836 |
m68k_areg (regs, opcode & 7) = regs.fpiar; |
| 837 |
} else { |
| 838 |
if (extra & 0x1000) |
| 839 |
regs.fpcr = m68k_areg (regs, opcode & 7); |
| 840 |
if (extra & 0x0800) |
| 841 |
regs.fpsr = m68k_areg (regs, opcode & 7); |
| 842 |
if (extra & 0x0400) |
| 843 |
regs.fpiar = m68k_areg (regs, opcode & 7); |
| 844 |
} |
| 845 |
} else if ((opcode & 0x3f) == 0x3c) { |
| 846 |
if ((extra & 0x2000) == 0) { |
| 847 |
if (extra & 0x1000) |
| 848 |
regs.fpcr = next_ilong(); |
| 849 |
if (extra & 0x0800) |
| 850 |
regs.fpsr = next_ilong(); |
| 851 |
if (extra & 0x0400) |
| 852 |
regs.fpiar = next_ilong(); |
| 853 |
} |
| 854 |
} else if (extra & 0x2000) { |
| 855 |
/* FMOVEM FPP->memory */ |
| 856 |
uae_u32 ad; |
| 857 |
int incr = 0; |
| 858 |
|
| 859 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 860 |
m68k_setpc (m68k_getpc () - 4); |
| 861 |
op_illg (opcode); |
| 862 |
return; |
| 863 |
} |
| 864 |
if ((opcode & 0x38) == 0x20) { |
| 865 |
if (extra & 0x1000) |
| 866 |
incr += 4; |
| 867 |
if (extra & 0x0800) |
| 868 |
incr += 4; |
| 869 |
if (extra & 0x0400) |
| 870 |
incr += 4; |
| 871 |
} |
| 872 |
ad -= incr; |
| 873 |
if (extra & 0x1000) { |
| 874 |
put_long (ad, regs.fpcr); |
| 875 |
ad += 4; |
| 876 |
} |
| 877 |
if (extra & 0x0800) { |
| 878 |
put_long (ad, regs.fpsr); |
| 879 |
ad += 4; |
| 880 |
} |
| 881 |
if (extra & 0x0400) { |
| 882 |
put_long (ad, regs.fpiar); |
| 883 |
ad += 4; |
| 884 |
} |
| 885 |
ad -= incr; |
| 886 |
if ((opcode & 0x38) == 0x18) |
| 887 |
m68k_areg (regs, opcode & 7) = ad; |
| 888 |
if ((opcode & 0x38) == 0x20) |
| 889 |
m68k_areg (regs, opcode & 7) = ad; |
| 890 |
} else { |
| 891 |
/* FMOVEM memory->FPP */ |
| 892 |
uae_u32 ad; |
| 893 |
|
| 894 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 895 |
m68k_setpc (m68k_getpc () - 4); |
| 896 |
op_illg (opcode); |
| 897 |
return; |
| 898 |
} |
| 899 |
ad = (opcode & 0x38) == 0x20 ? ad - 12 : ad; |
| 900 |
if (extra & 0x1000) { |
| 901 |
regs.fpcr = get_long (ad); |
| 902 |
ad += 4; |
| 903 |
} |
| 904 |
if (extra & 0x0800) { |
| 905 |
regs.fpsr = get_long (ad); |
| 906 |
ad += 4; |
| 907 |
} |
| 908 |
if (extra & 0x0400) { |
| 909 |
regs.fpiar = get_long (ad); |
| 910 |
ad += 4; |
| 911 |
} |
| 912 |
if ((opcode & 0x38) == 0x18) |
| 913 |
m68k_areg (regs, opcode & 7) = ad; |
| 914 |
if ((opcode & 0x38) == 0x20) |
| 915 |
m68k_areg (regs, opcode & 7) = ad - 12; |
| 916 |
} |
| 917 |
return; |
| 918 |
case 6: |
| 919 |
case 7: |
| 920 |
{ |
| 921 |
uae_u32 ad, list = 0; |
| 922 |
int incr = 0; |
| 923 |
if (extra & 0x2000) { |
| 924 |
/* FMOVEM FPP->memory */ |
| 925 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 926 |
m68k_setpc (m68k_getpc () - 4); |
| 927 |
op_illg (opcode); |
| 928 |
return; |
| 929 |
} |
| 930 |
switch ((extra >> 11) & 3) { |
| 931 |
case 0: /* static pred */ |
| 932 |
list = extra & 0xff; |
| 933 |
incr = -1; |
| 934 |
break; |
| 935 |
case 1: /* dynamic pred */ |
| 936 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 937 |
incr = -1; |
| 938 |
break; |
| 939 |
case 2: /* static postinc */ |
| 940 |
list = extra & 0xff; |
| 941 |
incr = 1; |
| 942 |
break; |
| 943 |
case 3: /* dynamic postinc */ |
| 944 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 945 |
incr = 1; |
| 946 |
break; |
| 947 |
} |
| 948 |
while (list) { |
| 949 |
uae_u32 wrd1, wrd2, wrd3; |
| 950 |
if (incr < 0) { |
| 951 |
from_exten(regs.fp[fpp_movem_index2[list]], |
| 952 |
&wrd1, &wrd2, &wrd3); |
| 953 |
ad -= 4; |
| 954 |
put_long (ad, wrd3); |
| 955 |
ad -= 4; |
| 956 |
put_long (ad, wrd2); |
| 957 |
ad -= 4; |
| 958 |
put_long (ad, wrd1); |
| 959 |
} else { |
| 960 |
from_exten(regs.fp[fpp_movem_index1[list]], |
| 961 |
&wrd1, &wrd2, &wrd3); |
| 962 |
put_long (ad, wrd1); |
| 963 |
ad += 4; |
| 964 |
put_long (ad, wrd2); |
| 965 |
ad += 4; |
| 966 |
put_long (ad, wrd3); |
| 967 |
ad += 4; |
| 968 |
} |
| 969 |
list = fpp_movem_next[list]; |
| 970 |
} |
| 971 |
if ((opcode & 0x38) == 0x18) |
| 972 |
m68k_areg (regs, opcode & 7) = ad; |
| 973 |
if ((opcode & 0x38) == 0x20) |
| 974 |
m68k_areg (regs, opcode & 7) = ad; |
| 975 |
} else { |
| 976 |
/* FMOVEM memory->FPP */ |
| 977 |
if (get_fp_ad(opcode, &ad) == 0) { |
| 978 |
m68k_setpc (m68k_getpc () - 4); |
| 979 |
op_illg (opcode); |
| 980 |
return; |
| 981 |
} |
| 982 |
switch ((extra >> 11) & 3) { |
| 983 |
case 0: /* static pred */ |
| 984 |
list = extra & 0xff; |
| 985 |
incr = -1; |
| 986 |
break; |
| 987 |
case 1: /* dynamic pred */ |
| 988 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 989 |
incr = -1; |
| 990 |
break; |
| 991 |
case 2: /* static postinc */ |
| 992 |
list = extra & 0xff; |
| 993 |
incr = 1; |
| 994 |
break; |
| 995 |
case 3: /* dynamic postinc */ |
| 996 |
list = m68k_dreg (regs, (extra >> 4) & 3) & 0xff; |
| 997 |
incr = 1; |
| 998 |
break; |
| 999 |
} |
| 1000 |
while (list) { |
| 1001 |
uae_u32 wrd1, wrd2, wrd3; |
| 1002 |
if (incr < 0) { |
| 1003 |
ad -= 4; |
| 1004 |
wrd3 = get_long (ad); |
| 1005 |
ad -= 4; |
| 1006 |
wrd2 = get_long (ad); |
| 1007 |
ad -= 4; |
| 1008 |
wrd1 = get_long (ad); |
| 1009 |
regs.fp[fpp_movem_index2[list]] = to_exten (wrd1, wrd2, wrd3); |
| 1010 |
} else { |
| 1011 |
wrd1 = get_long (ad); |
| 1012 |
ad += 4; |
| 1013 |
wrd2 = get_long (ad); |
| 1014 |
ad += 4; |
| 1015 |
wrd3 = get_long (ad); |
| 1016 |
ad += 4; |
| 1017 |
regs.fp[fpp_movem_index1[list]] = to_exten (wrd1, wrd2, wrd3); |
| 1018 |
} |
| 1019 |
list = fpp_movem_next[list]; |
| 1020 |
} |
| 1021 |
if ((opcode & 0x38) == 0x18) |
| 1022 |
m68k_areg (regs, opcode & 7) = ad; |
| 1023 |
if ((opcode & 0x38) == 0x20) |
| 1024 |
m68k_areg (regs, opcode & 7) = ad; |
| 1025 |
} |
| 1026 |
} |
| 1027 |
return; |
| 1028 |
case 0: |
| 1029 |
case 2: |
| 1030 |
reg = (extra >> 7) & 7; |
| 1031 |
if ((extra & 0xfc00) == 0x5c00) { |
| 1032 |
switch (extra & 0x7f) { |
| 1033 |
case 0x00: |
| 1034 |
regs.fp[reg] = 4.0 * atan(1.0); |
| 1035 |
break; |
| 1036 |
case 0x0b: |
| 1037 |
regs.fp[reg] = log10 (2.0); |
| 1038 |
break; |
| 1039 |
case 0x0c: |
| 1040 |
regs.fp[reg] = exp (1.0); |
| 1041 |
break; |
| 1042 |
case 0x0d: |
| 1043 |
regs.fp[reg] = log (exp (1.0)) / log (2.0); |
| 1044 |
break; |
| 1045 |
case 0x0e: |
| 1046 |
regs.fp[reg] = log (exp (1.0)) / log (10.0); |
| 1047 |
break; |
| 1048 |
case 0x0f: |
| 1049 |
regs.fp[reg] = 0.0; |
| 1050 |
break; |
| 1051 |
case 0x30: |
| 1052 |
regs.fp[reg] = log (2.0); |
| 1053 |
break; |
| 1054 |
case 0x31: |
| 1055 |
regs.fp[reg] = log (10.0); |
| 1056 |
break; |
| 1057 |
case 0x32: |
| 1058 |
regs.fp[reg] = 1.0e0; |
| 1059 |
break; |
| 1060 |
case 0x33: |
| 1061 |
regs.fp[reg] = 1.0e1; |
| 1062 |
break; |
| 1063 |
case 0x34: |
| 1064 |
regs.fp[reg] = 1.0e2; |
| 1065 |
break; |
| 1066 |
case 0x35: |
| 1067 |
regs.fp[reg] = 1.0e4; |
| 1068 |
break; |
| 1069 |
case 0x36: |
| 1070 |
regs.fp[reg] = 1.0e8; |
| 1071 |
break; |
| 1072 |
case 0x37: |
| 1073 |
regs.fp[reg] = 1.0e16; |
| 1074 |
break; |
| 1075 |
case 0x38: |
| 1076 |
regs.fp[reg] = 1.0e32; |
| 1077 |
break; |
| 1078 |
case 0x39: |
| 1079 |
regs.fp[reg] = 1.0e64; |
| 1080 |
break; |
| 1081 |
case 0x3a: |
| 1082 |
regs.fp[reg] = 1.0e128; |
| 1083 |
break; |
| 1084 |
case 0x3b: |
| 1085 |
regs.fp[reg] = 1.0e256; |
| 1086 |
break; |
| 1087 |
#if 0 |
| 1088 |
case 0x3c: |
| 1089 |
regs.fp[reg] = 1.0e512; |
| 1090 |
break; |
| 1091 |
case 0x3d: |
| 1092 |
regs.fp[reg] = 1.0e1024; |
| 1093 |
break; |
| 1094 |
case 0x3e: |
| 1095 |
regs.fp[reg] = 1.0e2048; |
| 1096 |
break; |
| 1097 |
case 0x3f: |
| 1098 |
regs.fp[reg] = 1.0e4096; |
| 1099 |
break; |
| 1100 |
#endif |
| 1101 |
default: |
| 1102 |
m68k_setpc (m68k_getpc () - 4); |
| 1103 |
op_illg (opcode); |
| 1104 |
break; |
| 1105 |
} |
| 1106 |
return; |
| 1107 |
} |
| 1108 |
if (get_fp_value (opcode, extra, &src) == 0) { |
| 1109 |
m68k_setpc (m68k_getpc () - 4); |
| 1110 |
op_illg (opcode); |
| 1111 |
return; |
| 1112 |
} |
| 1113 |
switch (extra & 0x7f) { |
| 1114 |
case 0x00: /* FMOVE */ |
| 1115 |
regs.fp[reg] = src; |
| 1116 |
break; |
| 1117 |
case 0x01: /* FINT */ |
| 1118 |
regs.fp[reg] = (int) (src + 0.5); |
| 1119 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1120 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1121 |
break; |
| 1122 |
case 0x02: /* FSINH */ |
| 1123 |
regs.fp[reg] = sinh (src); |
| 1124 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1125 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1126 |
break; |
| 1127 |
case 0x03: /* FINTRZ */ |
| 1128 |
regs.fp[reg] = (int) src; |
| 1129 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1130 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1131 |
break; |
| 1132 |
case 0x04: /* FSQRT */ |
| 1133 |
regs.fp[reg] = sqrt (src); |
| 1134 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1135 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1136 |
break; |
| 1137 |
case 0x06: /* FLOGNP1 */ |
| 1138 |
regs.fp[reg] = log (src + 1.0); |
| 1139 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1140 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1141 |
break; |
| 1142 |
case 0x08: /* FETOXM1 */ |
| 1143 |
regs.fp[reg] = exp (src) - 1.0; |
| 1144 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1145 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1146 |
break; |
| 1147 |
case 0x09: /* FTANH */ |
| 1148 |
regs.fp[reg] = tanh (src); |
| 1149 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1150 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1151 |
break; |
| 1152 |
case 0x0a: /* FATAN */ |
| 1153 |
regs.fp[reg] = atan (src); |
| 1154 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1155 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1156 |
break; |
| 1157 |
case 0x0c: /* FASIN */ |
| 1158 |
regs.fp[reg] = asin (src); |
| 1159 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1160 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1161 |
break; |
| 1162 |
case 0x0d: /* FATANH */ |
| 1163 |
#if 1 /* The BeBox doesn't have atanh, and it isn't in the HPUX libm either */ |
| 1164 |
regs.fp[reg] = log ((1 + src) / (1 - src)) / 2; |
| 1165 |
#else |
| 1166 |
regs.fp[reg] = atanh (src); |
| 1167 |
#endif |
| 1168 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1169 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1170 |
break; |
| 1171 |
case 0x0e: /* FSIN */ |
| 1172 |
regs.fp[reg] = sin (src); |
| 1173 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1174 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1175 |
break; |
| 1176 |
case 0x0f: /* FTAN */ |
| 1177 |
regs.fp[reg] = tan (src); |
| 1178 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1179 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1180 |
break; |
| 1181 |
case 0x10: /* FETOX */ |
| 1182 |
regs.fp[reg] = exp (src); |
| 1183 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1184 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1185 |
break; |
| 1186 |
case 0x11: /* FTWOTOX */ |
| 1187 |
regs.fp[reg] = pow(2.0, src); |
| 1188 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1189 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1190 |
break; |
| 1191 |
case 0x12: /* FTENTOX */ |
| 1192 |
regs.fp[reg] = pow(10.0, src); |
| 1193 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1194 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1195 |
break; |
| 1196 |
case 0x14: /* FLOGN */ |
| 1197 |
regs.fp[reg] = log (src); |
| 1198 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1199 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1200 |
break; |
| 1201 |
case 0x15: /* FLOG10 */ |
| 1202 |
regs.fp[reg] = log10 (src); |
| 1203 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1204 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1205 |
break; |
| 1206 |
case 0x16: /* FLOG2 */ |
| 1207 |
regs.fp[reg] = log (src) / log (2.0); |
| 1208 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1209 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1210 |
break; |
| 1211 |
case 0x18: /* FABS */ |
| 1212 |
regs.fp[reg] = src < 0 ? -src : src; |
| 1213 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1214 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1215 |
break; |
| 1216 |
case 0x19: /* FCOSH */ |
| 1217 |
regs.fp[reg] = cosh(src); |
| 1218 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1219 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1220 |
break; |
| 1221 |
case 0x1a: /* FNEG */ |
| 1222 |
regs.fp[reg] = -src; |
| 1223 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1224 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1225 |
break; |
| 1226 |
case 0x1c: /* FACOS */ |
| 1227 |
regs.fp[reg] = acos(src); |
| 1228 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1229 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1230 |
break; |
| 1231 |
case 0x1d: /* FCOS */ |
| 1232 |
regs.fp[reg] = cos(src); |
| 1233 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1234 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1235 |
break; |
| 1236 |
case 0x1e: /* FGETEXP */ |
| 1237 |
{ |
| 1238 |
int expon; |
| 1239 |
frexp (src, &expon); |
| 1240 |
regs.fp[reg] = (double) (expon - 1); |
| 1241 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1242 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1243 |
} |
| 1244 |
break; |
| 1245 |
case 0x1f: /* FGETMAN */ |
| 1246 |
{ |
| 1247 |
int expon; |
| 1248 |
regs.fp[reg] = frexp (src, &expon) * 2.0; |
| 1249 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1250 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1251 |
} |
| 1252 |
break; |
| 1253 |
case 0x20: /* FDIV */ |
| 1254 |
regs.fp[reg] /= src; |
| 1255 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1256 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1257 |
break; |
| 1258 |
case 0x21: /* FMOD */ |
| 1259 |
regs.fp[reg] = regs.fp[reg] - |
| 1260 |
(double) ((int) (regs.fp[reg] / src)) * src; |
| 1261 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1262 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1263 |
break; |
| 1264 |
case 0x22: /* FADD */ |
| 1265 |
regs.fp[reg] += src; |
| 1266 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1267 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1268 |
break; |
| 1269 |
case 0x23: /* FMUL */ |
| 1270 |
regs.fp[reg] *= src; |
| 1271 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1272 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1273 |
break; |
| 1274 |
case 0x24: /* FSGLDIV */ |
| 1275 |
regs.fp[reg] /= src; |
| 1276 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1277 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1278 |
break; |
| 1279 |
case 0x25: /* FREM */ |
| 1280 |
regs.fp[reg] = regs.fp[reg] - |
| 1281 |
(double) ((int) (regs.fp[reg] / src + 0.5)) * src; |
| 1282 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1283 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1284 |
break; |
| 1285 |
case 0x26: /* FSCALE */ |
| 1286 |
regs.fp[reg] *= exp (log (2.0) * src); |
| 1287 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1288 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1289 |
break; |
| 1290 |
case 0x27: /* FSGLMUL */ |
| 1291 |
regs.fp[reg] *= src; |
| 1292 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1293 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1294 |
break; |
| 1295 |
case 0x28: /* FSUB */ |
| 1296 |
regs.fp[reg] -= src; |
| 1297 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1298 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1299 |
break; |
| 1300 |
case 0x30: /* FSINCOS */ |
| 1301 |
case 0x31: |
| 1302 |
case 0x32: |
| 1303 |
case 0x33: |
| 1304 |
case 0x34: |
| 1305 |
case 0x35: |
| 1306 |
case 0x36: |
| 1307 |
case 0x37: |
| 1308 |
regs.fp[reg] = sin (src); |
| 1309 |
regs.fp[extra & 7] = cos(src); |
| 1310 |
regs.fpsr = (regs.fp[reg] == 0 ? 0x4000000 : 0) | |
| 1311 |
(regs.fp[reg] < 0 ? 0x8000000 : 0); |
| 1312 |
break; |
| 1313 |
case 0x38: /* FCMP */ |
| 1314 |
{ |
| 1315 |
double tmp = regs.fp[reg] - src; |
| 1316 |
regs.fpsr = (tmp == 0 ? 0x4000000 : 0) | |
| 1317 |
(tmp < 0 ? 0x8000000 : 0); |
| 1318 |
} |
| 1319 |
break; |
| 1320 |
case 0x3a: /* FTST */ |
| 1321 |
regs.fpsr = (src == 0 ? 0x4000000 : 0) | |
| 1322 |
(src < 0 ? 0x8000000 : 0); |
| 1323 |
break; |
| 1324 |
default: |
| 1325 |
m68k_setpc (m68k_getpc () - 4); |
| 1326 |
op_illg (opcode); |
| 1327 |
break; |
| 1328 |
} |
| 1329 |
return; |
| 1330 |
} |
| 1331 |
m68k_setpc (m68k_getpc () - 4); |
| 1332 |
op_illg (opcode); |
| 1333 |
} |
| 1334 |
|
| 1335 |
#endif |
