| 1 | ; |
| 2 | ; x86 format converters for HERMES |
| 3 | ; Copyright (c) 1998 Glenn Fielder (gaffer@gaffer.org) |
| 4 | ; This source code is licensed under the GNU LGPL |
| 5 | ; |
| 6 | ; Please refer to the file COPYING.LIB contained in the distribution for |
| 7 | ; licensing conditions |
| 8 | ; |
| 9 | ; Routines adjusted for Hermes by Christian Nentwich (brn@eleet.mcb.at) |
| 10 | ; Used with permission. |
| 11 | ; |
| 12 | |
| 13 | BITS 32 |
| 14 | |
| 15 | %include "common.inc" |
| 16 | |
| 17 | SDL_FUNC _ConvertX86p16_16BGR565 |
| 18 | SDL_FUNC _ConvertX86p16_16RGB555 |
| 19 | SDL_FUNC _ConvertX86p16_16BGR555 |
| 20 | SDL_FUNC _ConvertX86p16_8RGB332 |
| 21 | |
| 22 | EXTERN _ConvertX86 |
| 23 | |
| 24 | SECTION .text |
| 25 | |
| 26 | _ConvertX86p16_16BGR565: |
| 27 | |
| 28 | ; check short |
| 29 | cmp ecx,BYTE 16 |
| 30 | ja .L3 |
| 31 | |
| 32 | |
| 33 | .L1 ; short loop |
| 34 | mov al,[esi] |
| 35 | mov ah,[esi+1] |
| 36 | mov ebx,eax |
| 37 | mov edx,eax |
| 38 | shr eax,11 |
| 39 | and eax,BYTE 11111b |
| 40 | and ebx,11111100000b |
| 41 | shl edx,11 |
| 42 | add eax,ebx |
| 43 | add eax,edx |
| 44 | mov [edi],al |
| 45 | mov [edi+1],ah |
| 46 | add esi,BYTE 2 |
| 47 | add edi,BYTE 2 |
| 48 | dec ecx |
| 49 | jnz .L1 |
| 50 | .L2 |
| 51 | retn |
| 52 | |
| 53 | .L3 ; head |
| 54 | mov eax,edi |
| 55 | and eax,BYTE 11b |
| 56 | jz .L4 |
| 57 | mov al,[esi] |
| 58 | mov ah,[esi+1] |
| 59 | mov ebx,eax |
| 60 | mov edx,eax |
| 61 | shr eax,11 |
| 62 | and eax,BYTE 11111b |
| 63 | and ebx,11111100000b |
| 64 | shl edx,11 |
| 65 | add eax,ebx |
| 66 | add eax,edx |
| 67 | mov [edi],al |
| 68 | mov [edi+1],ah |
| 69 | add esi,BYTE 2 |
| 70 | add edi,BYTE 2 |
| 71 | dec ecx |
| 72 | |
| 73 | .L4 ; save count |
| 74 | push ecx |
| 75 | |
| 76 | ; unroll twice |
| 77 | shr ecx,1 |
| 78 | |
| 79 | ; point arrays to end |
| 80 | lea esi,[esi+ecx*4] |
| 81 | lea edi,[edi+ecx*4] |
| 82 | |
| 83 | ; negative counter |
| 84 | neg ecx |
| 85 | jmp SHORT .L6 |
| 86 | |
| 87 | .L5 mov [edi+ecx*4-4],eax |
| 88 | .L6 mov eax,[esi+ecx*4] |
| 89 | |
| 90 | mov ebx,[esi+ecx*4] |
| 91 | and eax,07E007E0h |
| 92 | |
| 93 | mov edx,[esi+ecx*4] |
| 94 | and ebx,0F800F800h |
| 95 | |
| 96 | shr ebx,11 |
| 97 | and edx,001F001Fh |
| 98 | |
| 99 | shl edx,11 |
| 100 | add eax,ebx |
| 101 | |
| 102 | add eax,edx |
| 103 | inc ecx |
| 104 | |
| 105 | jnz .L5 |
| 106 | |
| 107 | mov [edi+ecx*4-4],eax |
| 108 | |
| 109 | ; tail |
| 110 | pop ecx |
| 111 | and ecx,BYTE 1 |
| 112 | jz .L7 |
| 113 | mov al,[esi] |
| 114 | mov ah,[esi+1] |
| 115 | mov ebx,eax |
| 116 | mov edx,eax |
| 117 | shr eax,11 |
| 118 | and eax,BYTE 11111b |
| 119 | and ebx,11111100000b |
| 120 | shl edx,11 |
| 121 | add eax,ebx |
| 122 | add eax,edx |
| 123 | mov [edi],al |
| 124 | mov [edi+1],ah |
| 125 | add esi,BYTE 2 |
| 126 | add edi,BYTE 2 |
| 127 | |
| 128 | .L7 |
| 129 | retn |
| 130 | |
| 131 | |
| 132 | |
| 133 | |
| 134 | |
| 135 | |
| 136 | _ConvertX86p16_16RGB555: |
| 137 | |
| 138 | ; check short |
| 139 | cmp ecx,BYTE 32 |
| 140 | ja .L3 |
| 141 | |
| 142 | |
| 143 | .L1 ; short loop |
| 144 | mov al,[esi] |
| 145 | mov ah,[esi+1] |
| 146 | mov ebx,eax |
| 147 | shr ebx,1 |
| 148 | and ebx, 0111111111100000b |
| 149 | and eax,BYTE 0000000000011111b |
| 150 | add eax,ebx |
| 151 | mov [edi],al |
| 152 | mov [edi+1],ah |
| 153 | add esi,BYTE 2 |
| 154 | add edi,BYTE 2 |
| 155 | dec ecx |
| 156 | jnz .L1 |
| 157 | .L2 |
| 158 | retn |
| 159 | |
| 160 | .L3 ; head |
| 161 | mov eax,edi |
| 162 | and eax,BYTE 11b |
| 163 | jz .L4 |
| 164 | mov al,[esi] |
| 165 | mov ah,[esi+1] |
| 166 | mov ebx,eax |
| 167 | shr ebx,1 |
| 168 | and ebx, 0111111111100000b |
| 169 | and eax,BYTE 0000000000011111b |
| 170 | add eax,ebx |
| 171 | mov [edi],al |
| 172 | mov [edi+1],ah |
| 173 | add esi,BYTE 2 |
| 174 | add edi,BYTE 2 |
| 175 | dec ecx |
| 176 | |
| 177 | .L4 ; save ebp |
| 178 | push ebp |
| 179 | |
| 180 | ; save count |
| 181 | push ecx |
| 182 | |
| 183 | ; unroll four times |
| 184 | shr ecx,2 |
| 185 | |
| 186 | ; point arrays to end |
| 187 | lea esi,[esi+ecx*8] |
| 188 | lea edi,[edi+ecx*8] |
| 189 | |
| 190 | ; negative counter |
| 191 | xor ebp,ebp |
| 192 | sub ebp,ecx |
| 193 | |
| 194 | .L5 mov eax,[esi+ebp*8] ; agi? |
| 195 | mov ecx,[esi+ebp*8+4] |
| 196 | |
| 197 | mov ebx,eax |
| 198 | mov edx,ecx |
| 199 | |
| 200 | and eax,0FFC0FFC0h |
| 201 | and ecx,0FFC0FFC0h |
| 202 | |
| 203 | shr eax,1 |
| 204 | and ebx,001F001Fh |
| 205 | |
| 206 | shr ecx,1 |
| 207 | and edx,001F001Fh |
| 208 | |
| 209 | add eax,ebx |
| 210 | add ecx,edx |
| 211 | |
| 212 | mov [edi+ebp*8],eax |
| 213 | mov [edi+ebp*8+4],ecx |
| 214 | |
| 215 | inc ebp |
| 216 | jnz .L5 |
| 217 | |
| 218 | ; tail |
| 219 | pop ecx |
| 220 | .L6 and ecx,BYTE 11b |
| 221 | jz .L7 |
| 222 | mov al,[esi] |
| 223 | mov ah,[esi+1] |
| 224 | mov ebx,eax |
| 225 | shr ebx,1 |
| 226 | and ebx, 0111111111100000b |
| 227 | and eax,BYTE 0000000000011111b |
| 228 | add eax,ebx |
| 229 | mov [edi],al |
| 230 | mov [edi+1],ah |
| 231 | add esi,BYTE 2 |
| 232 | add edi,BYTE 2 |
| 233 | dec ecx |
| 234 | jmp SHORT .L6 |
| 235 | |
| 236 | .L7 pop ebp |
| 237 | retn |
| 238 | |
| 239 | |
| 240 | |
| 241 | |
| 242 | |
| 243 | |
| 244 | _ConvertX86p16_16BGR555: |
| 245 | |
| 246 | ; check short |
| 247 | cmp ecx,BYTE 16 |
| 248 | ja .L3 |
| 249 | |
| 250 | |
| 251 | .L1 ; short loop |
| 252 | mov al,[esi] |
| 253 | mov ah,[esi+1] |
| 254 | mov ebx,eax |
| 255 | mov edx,eax |
| 256 | shr eax,11 |
| 257 | and eax,BYTE 11111b |
| 258 | shr ebx,1 |
| 259 | and ebx,1111100000b |
| 260 | shl edx,10 |
| 261 | and edx,0111110000000000b |
| 262 | add eax,ebx |
| 263 | add eax,edx |
| 264 | mov [edi],al |
| 265 | mov [edi+1],ah |
| 266 | add esi,BYTE 2 |
| 267 | add edi,BYTE 2 |
| 268 | dec ecx |
| 269 | jnz .L1 |
| 270 | .L2 |
| 271 | retn |
| 272 | |
| 273 | .L3 ; head |
| 274 | mov eax,edi |
| 275 | and eax,BYTE 11b |
| 276 | jz .L4 |
| 277 | mov al,[esi] |
| 278 | mov ah,[esi+1] |
| 279 | mov ebx,eax |
| 280 | mov edx,eax |
| 281 | shr eax,11 |
| 282 | and eax,BYTE 11111b |
| 283 | shr ebx,1 |
| 284 | and ebx,1111100000b |
| 285 | shl edx,10 |
| 286 | and edx,0111110000000000b |
| 287 | add eax,ebx |
| 288 | add eax,edx |
| 289 | mov [edi],al |
| 290 | mov [edi+1],ah |
| 291 | add esi,BYTE 2 |
| 292 | add edi,BYTE 2 |
| 293 | dec ecx |
| 294 | |
| 295 | .L4 ; save count |
| 296 | push ecx |
| 297 | |
| 298 | ; unroll twice |
| 299 | shr ecx,1 |
| 300 | |
| 301 | ; point arrays to end |
| 302 | lea esi,[esi+ecx*4] |
| 303 | lea edi,[edi+ecx*4] |
| 304 | |
| 305 | ; negative counter |
| 306 | neg ecx |
| 307 | jmp SHORT .L6 |
| 308 | |
| 309 | .L5 mov [edi+ecx*4-4],eax |
| 310 | .L6 mov eax,[esi+ecx*4] |
| 311 | |
| 312 | shr eax,1 |
| 313 | mov ebx,[esi+ecx*4] |
| 314 | |
| 315 | and eax,03E003E0h |
| 316 | mov edx,[esi+ecx*4] |
| 317 | |
| 318 | and ebx,0F800F800h |
| 319 | |
| 320 | shr ebx,11 |
| 321 | and edx,001F001Fh |
| 322 | |
| 323 | shl edx,10 |
| 324 | add eax,ebx |
| 325 | |
| 326 | add eax,edx |
| 327 | inc ecx |
| 328 | |
| 329 | jnz .L5 |
| 330 | |
| 331 | mov [edi+ecx*4-4],eax |
| 332 | |
| 333 | ; tail |
| 334 | pop ecx |
| 335 | and ecx,BYTE 1 |
| 336 | jz .L7 |
| 337 | mov al,[esi] |
| 338 | mov ah,[esi+1] |
| 339 | mov ebx,eax |
| 340 | mov edx,eax |
| 341 | shr eax,11 |
| 342 | and eax,BYTE 11111b |
| 343 | shr ebx,1 |
| 344 | and ebx,1111100000b |
| 345 | shl edx,10 |
| 346 | and edx,0111110000000000b |
| 347 | add eax,ebx |
| 348 | add eax,edx |
| 349 | mov [edi],al |
| 350 | mov [edi+1],ah |
| 351 | add esi,BYTE 2 |
| 352 | add edi,BYTE 2 |
| 353 | |
| 354 | .L7 |
| 355 | retn |
| 356 | |
| 357 | |
| 358 | |
| 359 | |
| 360 | |
| 361 | |
| 362 | _ConvertX86p16_8RGB332: |
| 363 | |
| 364 | ; check short |
| 365 | cmp ecx,BYTE 16 |
| 366 | ja .L3 |
| 367 | |
| 368 | |
| 369 | .L1 ; short loop |
| 370 | mov al,[esi+0] |
| 371 | mov ah,[esi+1] |
| 372 | mov ebx,eax |
| 373 | mov edx,eax |
| 374 | and eax,BYTE 11000b ; blue |
| 375 | shr eax,3 |
| 376 | and ebx,11100000000b ; green |
| 377 | shr ebx,6 |
| 378 | and edx,1110000000000000b ; red |
| 379 | shr edx,8 |
| 380 | add eax,ebx |
| 381 | add eax,edx |
| 382 | mov [edi],al |
| 383 | add esi,BYTE 2 |
| 384 | inc edi |
| 385 | dec ecx |
| 386 | jnz .L1 |
| 387 | .L2 |
| 388 | retn |
| 389 | |
| 390 | .L3 mov eax,edi |
| 391 | and eax,BYTE 11b |
| 392 | jz .L4 |
| 393 | mov al,[esi+0] |
| 394 | mov ah,[esi+1] |
| 395 | mov ebx,eax |
| 396 | mov edx,eax |
| 397 | and eax,BYTE 11000b ; blue |
| 398 | shr eax,3 |
| 399 | and ebx,11100000000b ; green |
| 400 | shr ebx,6 |
| 401 | and edx,1110000000000000b ; red |
| 402 | shr edx,8 |
| 403 | add eax,ebx |
| 404 | add eax,edx |
| 405 | mov [edi],al |
| 406 | add esi,BYTE 2 |
| 407 | inc edi |
| 408 | dec ecx |
| 409 | jmp SHORT .L3 |
| 410 | |
| 411 | .L4 ; save ebp |
| 412 | push ebp |
| 413 | |
| 414 | ; save count |
| 415 | push ecx |
| 416 | |
| 417 | ; unroll 4 times |
| 418 | shr ecx,2 |
| 419 | |
| 420 | ; prestep |
| 421 | mov dl,[esi+0] |
| 422 | mov bl,[esi+1] |
| 423 | mov dh,[esi+2] |
| 424 | |
| 425 | .L5 shl edx,16 |
| 426 | mov bh,[esi+3] |
| 427 | |
| 428 | shl ebx,16 |
| 429 | mov dl,[esi+4] |
| 430 | |
| 431 | mov dh,[esi+6] |
| 432 | mov bl,[esi+5] |
| 433 | |
| 434 | and edx,00011000000110000001100000011000b |
| 435 | mov bh,[esi+7] |
| 436 | |
| 437 | ror edx,16+3 |
| 438 | mov eax,ebx ; setup eax for reds |
| 439 | |
| 440 | and ebx,00000111000001110000011100000111b |
| 441 | and eax,11100000111000001110000011100000b ; reds |
| 442 | |
| 443 | ror ebx,16-2 |
| 444 | add esi,BYTE 8 |
| 445 | |
| 446 | ror eax,16 |
| 447 | add edi,BYTE 4 |
| 448 | |
| 449 | add eax,ebx |
| 450 | mov bl,[esi+1] ; greens |
| 451 | |
| 452 | add eax,edx |
| 453 | mov dl,[esi+0] ; blues |
| 454 | |
| 455 | mov [edi-4],eax |
| 456 | mov dh,[esi+2] |
| 457 | |
| 458 | dec ecx |
| 459 | jnz .L5 |
| 460 | |
| 461 | ; check tail |
| 462 | pop ecx |
| 463 | and ecx,BYTE 11b |
| 464 | jz .L7 |
| 465 | |
| 466 | .L6 ; tail |
| 467 | mov al,[esi+0] |
| 468 | mov ah,[esi+1] |
| 469 | mov ebx,eax |
| 470 | mov edx,eax |
| 471 | and eax,BYTE 11000b ; blue |
| 472 | shr eax,3 |
| 473 | and ebx,11100000000b ; green |
| 474 | shr ebx,6 |
| 475 | and edx,1110000000000000b ; red |
| 476 | shr edx,8 |
| 477 | add eax,ebx |
| 478 | add eax,edx |
| 479 | mov [edi],al |
| 480 | add esi,BYTE 2 |
| 481 | inc edi |
| 482 | dec ecx |
| 483 | jnz .L6 |
| 484 | |
| 485 | .L7 pop ebp |
| 486 | retn |
| 487 | |
| 488 | %ifidn __OUTPUT_FORMAT__,elf |
| 489 | section .note.GNU-stack noalloc noexec nowrite progbits |
| 490 | %endif |