| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* This file contains portable stdlib functions for SDL */ |
| 25 | |
| 26 | #include "SDL_stdinc.h" |
| 27 | |
| 28 | #ifndef HAVE_LIBC |
| 29 | /* These are some C runtime intrinsics that need to be defined */ |
| 30 | |
| 31 | #if defined(_MSC_VER) |
| 32 | |
| 33 | #ifndef __FLTUSED__ |
| 34 | #define __FLTUSED__ |
| 35 | #ifdef __cplusplus |
| 36 | extern "C" |
| 37 | #endif |
| 38 | __declspec(selectany) int _fltused=1; |
| 39 | #endif |
| 40 | |
| 41 | /* Float to long */ |
| 42 | void __declspec(naked) _ftol() |
| 43 | { |
| 44 | __asm { |
| 45 | push ebp |
| 46 | mov ebp,esp |
| 47 | sub esp,20h |
| 48 | and esp,0FFFFFFF0h |
| 49 | fld st(0) |
| 50 | fst dword ptr [esp+18h] |
| 51 | fistp qword ptr [esp+10h] |
| 52 | fild qword ptr [esp+10h] |
| 53 | mov edx,dword ptr [esp+18h] |
| 54 | mov eax,dword ptr [esp+10h] |
| 55 | test eax,eax |
| 56 | je integer_QnaN_or_zero |
| 57 | arg_is_not_integer_QnaN: |
| 58 | fsubp st(1),st |
| 59 | test edx,edx |
| 60 | jns positive |
| 61 | fstp dword ptr [esp] |
| 62 | mov ecx,dword ptr [esp] |
| 63 | xor ecx,80000000h |
| 64 | add ecx,7FFFFFFFh |
| 65 | adc eax,0 |
| 66 | mov edx,dword ptr [esp+14h] |
| 67 | adc edx,0 |
| 68 | jmp localexit |
| 69 | positive: |
| 70 | fstp dword ptr [esp] |
| 71 | mov ecx,dword ptr [esp] |
| 72 | add ecx,7FFFFFFFh |
| 73 | sbb eax,0 |
| 74 | mov edx,dword ptr [esp+14h] |
| 75 | sbb edx,0 |
| 76 | jmp localexit |
| 77 | integer_QnaN_or_zero: |
| 78 | mov edx,dword ptr [esp+14h] |
| 79 | test edx,7FFFFFFFh |
| 80 | jne arg_is_not_integer_QnaN |
| 81 | fstp dword ptr [esp+18h] |
| 82 | fstp dword ptr [esp+18h] |
| 83 | localexit: |
| 84 | leave |
| 85 | ret |
| 86 | } |
| 87 | } |
| 88 | void __declspec(naked) _ftol2_sse() |
| 89 | { |
| 90 | _ftol(); |
| 91 | } |
| 92 | |
| 93 | /* 64-bit math operators for 32-bit systems */ |
| 94 | void __declspec(naked) _allmul() |
| 95 | { |
| 96 | __asm { |
| 97 | push ebp |
| 98 | mov ebp,esp |
| 99 | push edi |
| 100 | push esi |
| 101 | push ebx |
| 102 | sub esp,0Ch |
| 103 | mov eax,dword ptr [ebp+10h] |
| 104 | mov edi,dword ptr [ebp+8] |
| 105 | mov ebx,eax |
| 106 | mov esi,eax |
| 107 | sar esi,1Fh |
| 108 | mov eax,dword ptr [ebp+8] |
| 109 | mul ebx |
| 110 | imul edi,esi |
| 111 | mov ecx,edx |
| 112 | mov dword ptr [ebp-18h],eax |
| 113 | mov edx,dword ptr [ebp+0Ch] |
| 114 | add ecx,edi |
| 115 | imul ebx,edx |
| 116 | mov eax,dword ptr [ebp-18h] |
| 117 | lea ebx,[ebx+ecx] |
| 118 | mov dword ptr [ebp-14h],ebx |
| 119 | mov edx,dword ptr [ebp-14h] |
| 120 | add esp,0Ch |
| 121 | pop ebx |
| 122 | pop esi |
| 123 | pop edi |
| 124 | pop ebp |
| 125 | ret |
| 126 | } |
| 127 | } |
| 128 | void __declspec(naked) _alldiv() |
| 129 | { |
| 130 | __asm { |
| 131 | push edi |
| 132 | push esi |
| 133 | push ebx |
| 134 | xor edi,edi |
| 135 | mov eax,dword ptr [esp+14h] |
| 136 | or eax,eax |
| 137 | jge L1 |
| 138 | inc edi |
| 139 | mov edx,dword ptr [esp+10h] |
| 140 | neg eax |
| 141 | neg edx |
| 142 | sbb eax,0 |
| 143 | mov dword ptr [esp+14h],eax |
| 144 | mov dword ptr [esp+10h],edx |
| 145 | L1: |
| 146 | mov eax,dword ptr [esp+1Ch] |
| 147 | or eax,eax |
| 148 | jge L2 |
| 149 | inc edi |
| 150 | mov edx,dword ptr [esp+18h] |
| 151 | neg eax |
| 152 | neg edx |
| 153 | sbb eax,0 |
| 154 | mov dword ptr [esp+1Ch],eax |
| 155 | mov dword ptr [esp+18h],edx |
| 156 | L2: |
| 157 | or eax,eax |
| 158 | jne L3 |
| 159 | mov ecx,dword ptr [esp+18h] |
| 160 | mov eax,dword ptr [esp+14h] |
| 161 | xor edx,edx |
| 162 | div ecx |
| 163 | mov ebx,eax |
| 164 | mov eax,dword ptr [esp+10h] |
| 165 | div ecx |
| 166 | mov edx,ebx |
| 167 | jmp L4 |
| 168 | L3: |
| 169 | mov ebx,eax |
| 170 | mov ecx,dword ptr [esp+18h] |
| 171 | mov edx,dword ptr [esp+14h] |
| 172 | mov eax,dword ptr [esp+10h] |
| 173 | L5: |
| 174 | shr ebx,1 |
| 175 | rcr ecx,1 |
| 176 | shr edx,1 |
| 177 | rcr eax,1 |
| 178 | or ebx,ebx |
| 179 | jne L5 |
| 180 | div ecx |
| 181 | mov esi,eax |
| 182 | mul dword ptr [esp+1Ch] |
| 183 | mov ecx,eax |
| 184 | mov eax,dword ptr [esp+18h] |
| 185 | mul esi |
| 186 | add edx,ecx |
| 187 | jb L6 |
| 188 | cmp edx,dword ptr [esp+14h] |
| 189 | ja L6 |
| 190 | jb L7 |
| 191 | cmp eax,dword ptr [esp+10h] |
| 192 | jbe L7 |
| 193 | L6: |
| 194 | dec esi |
| 195 | L7: |
| 196 | xor edx,edx |
| 197 | mov eax,esi |
| 198 | L4: |
| 199 | dec edi |
| 200 | jne L8 |
| 201 | neg edx |
| 202 | neg eax |
| 203 | sbb edx,0 |
| 204 | L8: |
| 205 | pop ebx |
| 206 | pop esi |
| 207 | pop edi |
| 208 | ret 10h |
| 209 | } |
| 210 | } |
| 211 | void __declspec(naked) _aulldiv() |
| 212 | { |
| 213 | __asm { |
| 214 | push ebx |
| 215 | push esi |
| 216 | mov eax,dword ptr [esp+18h] |
| 217 | or eax,eax |
| 218 | jne L1 |
| 219 | mov ecx,dword ptr [esp+14h] |
| 220 | mov eax,dword ptr [esp+10h] |
| 221 | xor edx,edx |
| 222 | div ecx |
| 223 | mov ebx,eax |
| 224 | mov eax,dword ptr [esp+0Ch] |
| 225 | div ecx |
| 226 | mov edx,ebx |
| 227 | jmp L2 |
| 228 | L1: |
| 229 | mov ecx,eax |
| 230 | mov ebx,dword ptr [esp+14h] |
| 231 | mov edx,dword ptr [esp+10h] |
| 232 | mov eax,dword ptr [esp+0Ch] |
| 233 | L3: |
| 234 | shr ecx,1 |
| 235 | rcr ebx,1 |
| 236 | shr edx,1 |
| 237 | rcr eax,1 |
| 238 | or ecx,ecx |
| 239 | jne L3 |
| 240 | div ebx |
| 241 | mov esi,eax |
| 242 | mul dword ptr [esp+18h] |
| 243 | mov ecx,eax |
| 244 | mov eax,dword ptr [esp+14h] |
| 245 | mul esi |
| 246 | add edx,ecx |
| 247 | jb L4 |
| 248 | cmp edx,dword ptr [esp+10h] |
| 249 | ja L4 |
| 250 | jb L5 |
| 251 | cmp eax,dword ptr [esp+0Ch] |
| 252 | jbe L5 |
| 253 | L4: |
| 254 | dec esi |
| 255 | L5: |
| 256 | xor edx,edx |
| 257 | mov eax,esi |
| 258 | L2: |
| 259 | pop esi |
| 260 | pop ebx |
| 261 | ret 10h |
| 262 | } |
| 263 | } |
| 264 | void __declspec(naked) _allrem() |
| 265 | { |
| 266 | __asm { |
| 267 | push ebx |
| 268 | push edi |
| 269 | xor edi,edi |
| 270 | mov eax,dword ptr [esp+10h] |
| 271 | or eax,eax |
| 272 | jge L1 |
| 273 | inc edi |
| 274 | mov edx,dword ptr [esp+0Ch] |
| 275 | neg eax |
| 276 | neg edx |
| 277 | sbb eax,0 |
| 278 | mov dword ptr [esp+10h],eax |
| 279 | mov dword ptr [esp+0Ch],edx |
| 280 | L1: |
| 281 | mov eax,dword ptr [esp+18h] |
| 282 | or eax,eax |
| 283 | jge L2 |
| 284 | mov edx,dword ptr [esp+14h] |
| 285 | neg eax |
| 286 | neg edx |
| 287 | sbb eax,0 |
| 288 | mov dword ptr [esp+18h],eax |
| 289 | mov dword ptr [esp+14h],edx |
| 290 | L2: |
| 291 | or eax,eax |
| 292 | jne L3 |
| 293 | mov ecx,dword ptr [esp+14h] |
| 294 | mov eax,dword ptr [esp+10h] |
| 295 | xor edx,edx |
| 296 | div ecx |
| 297 | mov eax,dword ptr [esp+0Ch] |
| 298 | div ecx |
| 299 | mov eax,edx |
| 300 | xor edx,edx |
| 301 | dec edi |
| 302 | jns L4 |
| 303 | jmp L8 |
| 304 | L3: |
| 305 | mov ebx,eax |
| 306 | mov ecx,dword ptr [esp+14h] |
| 307 | mov edx,dword ptr [esp+10h] |
| 308 | mov eax,dword ptr [esp+0Ch] |
| 309 | L5: |
| 310 | shr ebx,1 |
| 311 | rcr ecx,1 |
| 312 | shr edx,1 |
| 313 | rcr eax,1 |
| 314 | or ebx,ebx |
| 315 | jne L5 |
| 316 | div ecx |
| 317 | mov ecx,eax |
| 318 | mul dword ptr [esp+18h] |
| 319 | xchg eax,ecx |
| 320 | mul dword ptr [esp+14h] |
| 321 | add edx,ecx |
| 322 | jb L6 |
| 323 | cmp edx,dword ptr [esp+10h] |
| 324 | ja L6 |
| 325 | jb L7 |
| 326 | cmp eax,dword ptr [esp+0Ch] |
| 327 | jbe L7 |
| 328 | L6: |
| 329 | sub eax,dword ptr [esp+14h] |
| 330 | sbb edx,dword ptr [esp+18h] |
| 331 | L7: |
| 332 | sub eax,dword ptr [esp+0Ch] |
| 333 | sbb edx,dword ptr [esp+10h] |
| 334 | dec edi |
| 335 | jns L8 |
| 336 | L4: |
| 337 | neg edx |
| 338 | neg eax |
| 339 | sbb edx,0 |
| 340 | L8: |
| 341 | pop edi |
| 342 | pop ebx |
| 343 | ret 10h |
| 344 | } |
| 345 | } |
| 346 | void __declspec(naked) _aullrem() |
| 347 | { |
| 348 | __asm { |
| 349 | push ebx |
| 350 | mov eax,dword ptr [esp+14h] |
| 351 | or eax,eax |
| 352 | jne L1 |
| 353 | mov ecx,dword ptr [esp+10h] |
| 354 | mov eax,dword ptr [esp+0Ch] |
| 355 | xor edx,edx |
| 356 | div ecx |
| 357 | mov eax,dword ptr [esp+8] |
| 358 | div ecx |
| 359 | mov eax,edx |
| 360 | xor edx,edx |
| 361 | jmp L2 |
| 362 | L1: |
| 363 | mov ecx,eax |
| 364 | mov ebx,dword ptr [esp+10h] |
| 365 | mov edx,dword ptr [esp+0Ch] |
| 366 | mov eax,dword ptr [esp+8] |
| 367 | L3: |
| 368 | shr ecx,1 |
| 369 | rcr ebx,1 |
| 370 | shr edx,1 |
| 371 | rcr eax,1 |
| 372 | or ecx,ecx |
| 373 | jne L3 |
| 374 | div ebx |
| 375 | mov ecx,eax |
| 376 | mul dword ptr [esp+14h] |
| 377 | xchg eax,ecx |
| 378 | mul dword ptr [esp+10h] |
| 379 | add edx,ecx |
| 380 | jb L4 |
| 381 | cmp edx,dword ptr [esp+0Ch] |
| 382 | ja L4 |
| 383 | jb L5 |
| 384 | cmp eax,dword ptr [esp+8] |
| 385 | jbe L5 |
| 386 | L4: |
| 387 | sub eax,dword ptr [esp+10h] |
| 388 | sbb edx,dword ptr [esp+14h] |
| 389 | L5: |
| 390 | sub eax,dword ptr [esp+8] |
| 391 | sbb edx,dword ptr [esp+0Ch] |
| 392 | neg edx |
| 393 | neg eax |
| 394 | sbb edx,0 |
| 395 | L2: |
| 396 | pop ebx |
| 397 | ret 10h |
| 398 | } |
| 399 | } |
| 400 | void __declspec(naked) _alldvrm() |
| 401 | { |
| 402 | __asm { |
| 403 | push edi |
| 404 | push esi |
| 405 | push ebp |
| 406 | xor edi,edi |
| 407 | xor ebp,ebp |
| 408 | mov eax,dword ptr [esp+14h] |
| 409 | or eax,eax |
| 410 | jge L1 |
| 411 | inc edi |
| 412 | inc ebp |
| 413 | mov edx,dword ptr [esp+10h] |
| 414 | neg eax |
| 415 | neg edx |
| 416 | sbb eax,0 |
| 417 | mov dword ptr [esp+14h],eax |
| 418 | mov dword ptr [esp+10h],edx |
| 419 | L1: |
| 420 | mov eax,dword ptr [esp+1Ch] |
| 421 | or eax,eax |
| 422 | jge L2 |
| 423 | inc edi |
| 424 | mov edx,dword ptr [esp+18h] |
| 425 | neg eax |
| 426 | neg edx |
| 427 | sbb eax,0 |
| 428 | mov dword ptr [esp+1Ch],eax |
| 429 | mov dword ptr [esp+18h],edx |
| 430 | L2: |
| 431 | or eax,eax |
| 432 | jne L3 |
| 433 | mov ecx,dword ptr [esp+18h] |
| 434 | mov eax,dword ptr [esp+14h] |
| 435 | xor edx,edx |
| 436 | div ecx |
| 437 | mov ebx,eax |
| 438 | mov eax,dword ptr [esp+10h] |
| 439 | div ecx |
| 440 | mov esi,eax |
| 441 | mov eax,ebx |
| 442 | mul dword ptr [esp+18h] |
| 443 | mov ecx,eax |
| 444 | mov eax,esi |
| 445 | mul dword ptr [esp+18h] |
| 446 | add edx,ecx |
| 447 | jmp L4 |
| 448 | L3: |
| 449 | mov ebx,eax |
| 450 | mov ecx,dword ptr [esp+18h] |
| 451 | mov edx,dword ptr [esp+14h] |
| 452 | mov eax,dword ptr [esp+10h] |
| 453 | L5: |
| 454 | shr ebx,1 |
| 455 | rcr ecx,1 |
| 456 | shr edx,1 |
| 457 | rcr eax,1 |
| 458 | or ebx,ebx |
| 459 | jne L5 |
| 460 | div ecx |
| 461 | mov esi,eax |
| 462 | mul dword ptr [esp+1Ch] |
| 463 | mov ecx,eax |
| 464 | mov eax,dword ptr [esp+18h] |
| 465 | mul esi |
| 466 | add edx,ecx |
| 467 | jb L6 |
| 468 | cmp edx,dword ptr [esp+14h] |
| 469 | ja L6 |
| 470 | jb L7 |
| 471 | cmp eax,dword ptr [esp+10h] |
| 472 | jbe L7 |
| 473 | L6: |
| 474 | dec esi |
| 475 | sub eax,dword ptr [esp+18h] |
| 476 | sbb edx,dword ptr [esp+1Ch] |
| 477 | L7: |
| 478 | xor ebx,ebx |
| 479 | L4: |
| 480 | sub eax,dword ptr [esp+10h] |
| 481 | sbb edx,dword ptr [esp+14h] |
| 482 | dec ebp |
| 483 | jns L9 |
| 484 | neg edx |
| 485 | neg eax |
| 486 | sbb edx,0 |
| 487 | L9: |
| 488 | mov ecx,edx |
| 489 | mov edx,ebx |
| 490 | mov ebx,ecx |
| 491 | mov ecx,eax |
| 492 | mov eax,esi |
| 493 | dec edi |
| 494 | jne L8 |
| 495 | neg edx |
| 496 | neg eax |
| 497 | sbb edx,0 |
| 498 | L8: |
| 499 | pop ebp |
| 500 | pop esi |
| 501 | pop edi |
| 502 | ret 10h |
| 503 | } |
| 504 | } |
| 505 | void __declspec(naked) _aulldvrm() |
| 506 | { |
| 507 | __asm { |
| 508 | push esi |
| 509 | mov eax,dword ptr [esp+14h] |
| 510 | or eax,eax |
| 511 | jne L1 |
| 512 | mov ecx,dword ptr [esp+10h] |
| 513 | mov eax,dword ptr [esp+0Ch] |
| 514 | xor edx,edx |
| 515 | div ecx |
| 516 | mov ebx,eax |
| 517 | mov eax,dword ptr [esp+8] |
| 518 | div ecx |
| 519 | mov esi,eax |
| 520 | mov eax,ebx |
| 521 | mul dword ptr [esp+10h] |
| 522 | mov ecx,eax |
| 523 | mov eax,esi |
| 524 | mul dword ptr [esp+10h] |
| 525 | add edx,ecx |
| 526 | jmp L2 |
| 527 | L1: |
| 528 | mov ecx,eax |
| 529 | mov ebx,dword ptr [esp+10h] |
| 530 | mov edx,dword ptr [esp+0Ch] |
| 531 | mov eax,dword ptr [esp+8] |
| 532 | L3: |
| 533 | shr ecx,1 |
| 534 | rcr ebx,1 |
| 535 | shr edx,1 |
| 536 | rcr eax,1 |
| 537 | or ecx,ecx |
| 538 | jne L3 |
| 539 | div ebx |
| 540 | mov esi,eax |
| 541 | mul dword ptr [esp+14h] |
| 542 | mov ecx,eax |
| 543 | mov eax,dword ptr [esp+10h] |
| 544 | mul esi |
| 545 | add edx,ecx |
| 546 | jb L4 |
| 547 | cmp edx,dword ptr [esp+0Ch] |
| 548 | ja L4 |
| 549 | jb L5 |
| 550 | cmp eax,dword ptr [esp+8] |
| 551 | jbe L5 |
| 552 | L4: |
| 553 | dec esi |
| 554 | sub eax,dword ptr [esp+10h] |
| 555 | sbb edx,dword ptr [esp+14h] |
| 556 | L5: |
| 557 | xor ebx,ebx |
| 558 | L2: |
| 559 | sub eax,dword ptr [esp+8] |
| 560 | sbb edx,dword ptr [esp+0Ch] |
| 561 | neg edx |
| 562 | neg eax |
| 563 | sbb edx,0 |
| 564 | mov ecx,edx |
| 565 | mov edx,ebx |
| 566 | mov ebx,ecx |
| 567 | mov ecx,eax |
| 568 | mov eax,esi |
| 569 | pop esi |
| 570 | ret 10h |
| 571 | } |
| 572 | } |
| 573 | void __declspec(naked) _allshl() |
| 574 | { |
| 575 | __asm { |
| 576 | cmp cl,40h |
| 577 | jae RETZERO |
| 578 | cmp cl,20h |
| 579 | jae MORE32 |
| 580 | shld edx,eax,cl |
| 581 | shl eax,cl |
| 582 | ret |
| 583 | MORE32: |
| 584 | mov edx,eax |
| 585 | xor eax,eax |
| 586 | and cl,1Fh |
| 587 | shl edx,cl |
| 588 | ret |
| 589 | RETZERO: |
| 590 | xor eax,eax |
| 591 | xor edx,edx |
| 592 | ret |
| 593 | } |
| 594 | } |
| 595 | void __declspec(naked) _aullshr() |
| 596 | { |
| 597 | __asm { |
| 598 | cmp cl,40h |
| 599 | jae RETZERO |
| 600 | cmp cl,20h |
| 601 | jae MORE32 |
| 602 | shrd eax,edx,cl |
| 603 | shr edx,cl |
| 604 | ret |
| 605 | MORE32: |
| 606 | mov eax,edx |
| 607 | xor edx,edx |
| 608 | and cl,1Fh |
| 609 | shr eax,cl |
| 610 | ret |
| 611 | RETZERO: |
| 612 | xor eax,eax |
| 613 | xor edx,edx |
| 614 | ret |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | #endif /* MSC_VER */ |
| 619 | |
| 620 | #endif /* !HAVE_LIBC */ |