1 ; 2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license 5 ; that can be found in the LICENSE file in the root of the source 6 ; tree. An additional intellectual property rights grant can be found 7 ; in the file PATENTS. All contributing project authors may 8 ; be found in the AUTHORS file in the root of the source tree. 9 ; 10 11 12 EXPORT |horizontal_line_4_5_scale_armv4| 13 EXPORT |vertical_band_4_5_scale_armv4| 14 EXPORT |horizontal_line_2_3_scale_armv4| 15 EXPORT |vertical_band_2_3_scale_armv4| 16 EXPORT |horizontal_line_3_5_scale_armv4| 17 EXPORT |vertical_band_3_5_scale_armv4| 18 EXPORT |horizontal_line_3_4_scale_armv4| 19 EXPORT |vertical_band_3_4_scale_armv4| 20 EXPORT |horizontal_line_1_2_scale_armv4| 21 EXPORT |vertical_band_1_2_scale_armv4| 22 23 AREA |.text|, CODE, READONLY ; name this block of code 24 25 src RN r0 26 srcw RN r1 27 dest RN r2 28 mask RN r12 29 c51_205 RN r10 30 c102_154 RN r11 31 ;/**************************************************************************** 32 ; * 33 ; * ROUTINE : horizontal_line_4_5_scale_armv4 34 ; * 35 ; * INPUTS : const unsigned char *source : Pointer to source data. 36 ; * unsigned int source_width : Stride of source. 37 ; * unsigned char *dest : Pointer to destination data. 38 ; * unsigned int dest_width : Stride of destination (NOT USED). 39 ; * 40 ; * OUTPUTS : None. 41 ; * 42 ; * RETURNS : void 43 ; * 44 ; * FUNCTION : Copies horizontal line of pixels from source to 45 ; * destination scaling up by 4 to 5. 46 ; * 47 ; * SPECIAL NOTES : None. 48 ; * 49 ; ****************************************************************************/ 50 ;void horizontal_line_4_5_scale_armv4 51 ;( 52 ; r0 = UINT8 *source 53 ; r1 = UINT32 source_width 54 ; r2 = UINT8 *dest 55 ; r3 = UINT32 dest_width 56 ;) 57 |horizontal_line_4_5_scale_armv4| PROC 58 stmdb sp!, {r4 - r11, lr} 59 60 mov mask, #255 ; mask for selection 61 ldr c51_205, =0x3300cd 62 ldr c102_154, =0x66009a 63 64 ldr r3, [src], #4 65 66 hl45_loop 67 68 and r4, r3, mask ; a = src[0] 69 and r5, mask, r3, lsr #8 ; b = src[1] 70 strb r4, [dest], #1 71 72 orr r6, r4, r5, lsl #16 ; b | a 73 and r7, mask, r3, lsr #16 ; c = src[2] 74 mul r6, c51_205, r6 ; a * 51 + 205 * b 75 76 orr r5, r5, r7, lsl #16 ; c | b 77 mul r5, c102_154, r5 ; b * 102 + 154 * c 78 add r6, r6, #0x8000 79 and r8, mask, r3, lsr #24 ; d = src[3] 80 mov r6, r6, lsr #24 81 strb r6, [dest], #1 82 83 orr r7, r8, r7, lsl #16 ; c | d 84 mul r7, c102_154, r7 ; c * 154 + 102 * d 85 add r5, r5, #0x8000 86 ldr r3, [src], #4 87 mov r5, r5, lsr #24 88 strb r5, [dest], #1 89 90 add r7, r7, #0x8000 91 and r9, mask, r3 ; e = src[4] 92 orr r9, r9, r8, lsl #16 ; d | e 93 mul r9, c51_205, r9 ; d * 205 + 51 * e 94 mov r7, r7, lsr #24 95 strb r7, [dest], #1 96 97 add r9, r9, #0x8000 98 subs srcw, srcw, #4 99 mov r9, r9, lsr #24 100 strb r9, [dest], #1 101 102 bne hl45_loop 103 104 and r4, r3, mask 105 and r5, mask, r3, lsl #8 106 strb r4, [dest], #1 107 108 orr r6, r4, r5, lsl #16 ; b | a 109 mul r6, c51_205, r6 110 111 and r7, mask, r3, lsl #16 112 orr r5, r5, r7, lsl #16 ; c | b 113 mul r5, c102_154, r5 114 add r6, r6, #0x8000 115 and r8, mask, r3, lsl #24 116 mov r6, r6, lsr #24 117 strb r6, [dest], #1 118 119 orr r7, r8, r7, lsl #16 ; c | d 120 mul r7, c102_154, r7 121 add r5, r5, #0x8000 122 mov r5, r5, lsr #24 123 strb r5, [dest], #1 124 125 add r7, r7, #0x8000 126 mov r7, r7, lsr #24 127 strb r7, [dest], #1 128 129 ldrb r3, [src] 130 strb r3, [dest], #1 131 132 ldmia sp!, {r4 - r11, pc} 133 ENDP ;|vp8cx_horizontal_line_4_5_scale_c| 134 135 ;/**************************************************************************** 136 ; * 137 ; * ROUTINE : vertical_band_4_5_scale_armv4 138 ; * 139 ; * INPUTS : unsigned char *dest : Pointer to destination data. 140 ; * unsigned int dest_pitch : Stride of destination data. 141 ; * unsigned int dest_width : Width of destination data. 142 ; * 143 ; * OUTPUTS : None. 144 ; * 145 ; * RETURNS : void 146 ; * 147 ; * FUNCTION : Scales vertical band of pixels by scale 4 to 5. The 148 ; * height of the band scaled is 4-pixels. 149 ; * 150 ; * SPECIAL NOTES : The routine uses the first line of the band below 151 ; * the current band. 152 ; * 153 ; ****************************************************************************/ 154 ;void vertical_band_4_5_scale_armv4 155 ;( 156 ; r0 = UINT8 *dest 157 ; r1 = UINT32 dest_pitch 158 ; r2 = UINT32 dest_width 159 ;) 160 |vertical_band_4_5_scale_armv4| PROC 161 stmdb sp!, {r4 - r11, lr} 162 163 ldr c51_205, =0x3300cd 164 ldr c102_154, =0x66009a 165 166 vl45_loop 167 mov r3, src 168 ldrb r4, [r3], r1 ; a = des [0] 169 ldrb r5, [r3], r1 ; b = des [dest_pitch] 170 ldrb r7, [r3], r1 ; c = des[dest_pitch*2] 171 add lr, src, r1 172 173 orr r6, r4, r5, lsl #16 ; b | a 174 mul r6, c51_205, r6 ; a * 51 + 205 * b 175 176 ldrb r8, [r3], r1 ; d = des[dest_pitch*3] 177 orr r5, r5, r7, lsl #16 ; c | b 178 mul r5, c102_154, r5 ; b * 102 + 154 * c 179 add r6, r6, #0x8000 180 orr r7, r8, r7, lsl #16 ; c | d 181 mov r6, r6, lsr #24 182 strb r6, [lr], r1 183 184 ldrb r9, [r3, r1] ; e = des [dest_pitch * 5] 185 mul r7, c102_154, r7 ; c * 154 + 102 * d 186 add r5, r5, #0x8000 187 orr r9, r9, r8, lsl #16 ; d | e 188 mov r5, r5, lsr #24 189 strb r5, [lr], r1 190 191 mul r9, c51_205, r9 ; d * 205 + 51 * e 192 add r7, r7, #0x8000 193 add src, src, #1 194 mov r7, r7, lsr #24 195 strb r7, [lr], r1 196 197 add r9, r9, #0x8000 198 subs r2, r2, #1 199 mov r9, r9, lsr #24 200 strb r9, [lr], r1 201 202 bne vl45_loop 203 204 ldmia sp!, {r4 - r11, pc} 205 ENDP ;|vertical_band_4_5_scale_armv4| 206 207 ;/**************************************************************************** 208 ; * 209 ; * ROUTINE : horizontal_line_2_3_scale_armv4 210 ; * 211 ; * INPUTS : const unsigned char *source : Pointer to source data. 212 ; * unsigned int source_width : Stride of source. 213 ; * unsigned char *dest : Pointer to destination data. 214 ; * unsigned int dest_width : Stride of destination (NOT USED). 215 ; * 216 ; * OUTPUTS : None. 217 ; * 218 ; * RETURNS : void 219 ; * 220 ; * FUNCTION : Copies horizontal line of pixels from source to 221 ; * destination scaling up by 2 to 3. 222 ; * 223 ; * SPECIAL NOTES : None. 224 ; * 225 ; * 226 ; ****************************************************************************/ 227 ;void horizontal_line_2_3_scale_armv4 228 ;( 229 ; const unsigned char *source, 230 ; unsigned int source_width, 231 ; unsigned char *dest, 232 ; unsigned int dest_width 233 ;) 234 |horizontal_line_2_3_scale_armv4| PROC 235 stmdb sp!, {r4 - r11, lr} 236 ldr lr, =85 237 ldr r12, =171 238 239 hl23_loop 240 241 ldrb r3, [src], #1 ; a 242 ldrb r4, [src], #1 ; b 243 ldrb r5, [src] ; c 244 245 strb r3, [dest], #1 246 mul r4, r12, r4 ; b * 171 247 mla r6, lr, r3, r4 ; a * 85 248 mla r7, lr, r5, r4 ; c * 85 249 250 add r6, r6, #128 251 mov r6, r6, lsr #8 252 strb r6, [dest], #1 253 254 add r7, r7, #128 255 mov r7, r7, lsr #8 256 strb r7, [dest], #1 257 258 subs srcw, srcw, #2 259 bne hl23_loop 260 261 ldrb r4, [src, #1] ; b 262 strb r5, [dest], #1 263 strb r4, [dest, #1] 264 265 mul r4, r12, r4 ; b * 171 266 mla r6, lr, r5, r4 ; a * 85 + b *171 267 268 add r6, r6, #128 269 mov r6, r6, lsr #8 270 strb r6, [dest] 271 272 ldmia sp!, {r4 - r11, pc} 273 ENDP ;|horizontal_line_2_3_scale_armv4| 274 275 ;/**************************************************************************** 276 ; * 277 ; * ROUTINE : vertical_band_2_3_scale_armv4 278 ; * 279 ; * INPUTS : unsigned char *dest : Pointer to destination data. 280 ; * unsigned int dest_pitch : Stride of destination data. 281 ; * unsigned int dest_width : Width of destination data. 282 ; * 283 ; * OUTPUTS : None. 284 ; * 285 ; * RETURNS : void 286 ; * 287 ; * FUNCTION : Scales vertical band of pixels by scale 2 to 3. The 288 ; * height of the band scaled is 2-pixels. 289 ; * 290 ; * SPECIAL NOTES : The routine uses the first line of the band below 291 ; * the current band. 292 ; * 293 ; ****************************************************************************/ 294 ;void vertical_band_2_3_scale_armv4 295 ;( 296 ; r0 = UINT8 *dest 297 ; r1 = UINT32 dest_pitch 298 ; r2 = UINT32 dest_width 299 ;) 300 |vertical_band_2_3_scale_armv4| PROC 301 stmdb sp!, {r4 - r8, lr} 302 ldr lr, =85 303 ldr r12, =171 304 add r3, r1, r1, lsl #1 ; 3 * dest_pitch 305 306 vl23_loop 307 ldrb r4, [src] ; a = des [0] 308 ldrb r5, [src, r1] ; b = des [dest_pitch] 309 ldrb r7, [src, r3] ; c = des [dest_pitch*3] 310 subs r2, r2, #1 311 312 mul r5, r12, r5 ; b * 171 313 mla r6, lr, r4, r5 ; a * 85 314 mla r8, lr, r7, r5 ; c * 85 315 316 add r6, r6, #128 317 mov r6, r6, lsr #8 318 strb r6, [src, r1] 319 320 add r8, r8, #128 321 mov r8, r8, lsr #8 322 strb r8, [src, r1, lsl #1] 323 324 add src, src, #1 325 326 bne vl23_loop 327 328 ldmia sp!, {r4 - r8, pc} 329 ENDP ;|vertical_band_2_3_scale_armv4| 330 331 ;/**************************************************************************** 332 ; * 333 ; * ROUTINE : vp8cx_horizontal_line_3_5_scale_c 334 ; * 335 ; * INPUTS : const unsigned char *source : Pointer to source data. 336 ; * unsigned int source_width : Stride of source. 337 ; * unsigned char *dest : Pointer to destination data. 338 ; * unsigned int dest_width : Stride of destination (NOT USED). 339 ; * 340 ; * OUTPUTS : None. 341 ; * 342 ; * RETURNS : void 343 ; * 344 ; * FUNCTION : Copies horizontal line of pixels from source to 345 ; * destination scaling up by 3 to 5. 346 ; * 347 ; * SPECIAL NOTES : None. 348 ; * 349 ; * 350 ; ****************************************************************************/ 351 ;void vp8cx_horizontal_line_3_5_scale_c 352 ;( 353 ; const unsigned char *source, 354 ; unsigned int source_width, 355 ; unsigned char *dest, 356 ; unsigned int dest_width 357 ;) 358 |horizontal_line_3_5_scale_armv4| PROC 359 stmdb sp!, {r4 - r11, lr} 360 361 ldr c51_205, =0x3300cd 362 ldr c102_154, =0x66009a 363 364 ldrb r4, [src], #1 ; a = src[0] 365 366 hl35_loop 367 368 ldrb r8, [src], #1 ; b = src[1] 369 strb r4, [dest], #1 370 371 orr r6, r4, r8, lsl #16 ; b | a 372 ldrb r9, [src], #1 ; c = src[2] 373 mul r6, c102_154, r6 ; a * 102 + 154 * b 374 375 orr r5, r9, r8, lsl #16 ; b | c 376 mul r5, c51_205, r5 ; b * 205 + 51 * c 377 add r6, r6, #0x8000 378 ldrb r4, [src], #1 ; d = src[3] 379 mov r6, r6, lsr #24 380 strb r6, [dest], #1 381 382 orr r7, r8, r9, lsl #16 ; c | b 383 mul r7, c51_205, r7 ; c * 205 + 154 * b 384 add r5, r5, #0x8000 385 mov r5, r5, lsr #24 386 strb r5, [dest], #1 387 388 orr r9, r4, r9, lsl #16 ; c | d 389 mul r9, c102_154, r9 ; c * 154 + 102 * d 390 add r7, r7, #0x8000 391 mov r7, r7, lsr #24 392 strb r7, [dest], #1 393 394 add r9, r9, #0x8000 395 subs srcw, srcw, #3 396 mov r9, r9, lsr #24 397 strb r9, [dest], #1 398 399 bpl hl35_loop 400 401 ldrb r5, [src], #1 ; b = src[1] 402 strb r4, [dest], #1 403 404 orr r6, r4, r8, lsl #16 ; b | a 405 ldrb r9, [src], #1 ; c = src[2] 406 mul r6, c102_154, r6 ; a * 102 + 154 * b 407 408 orr r5, r9, r8, lsl #16 ; b | c 409 mul r5, c51_205, r5 ; b * 205 + 51 * c 410 add r6, r6, #0x8000 411 mov r6, r6, lsr #24 412 strb r6, [dest], #1 413 414 orr r7, r8, r9, lsl #16 ; c | b 415 mul r7, c51_205, r7 ; c * 205 + 154 * b 416 add r5, r5, #0x8000 417 mov r5, r5, lsr #24 418 strb r5, [dest], #1 419 420 add r7, r7, #0x8000 421 mov r7, r7, lsr #24 422 strb r7, [dest], #1 423 strb r9, [dest], #1 424 425 ldmia sp!, {r4 - r11, pc} 426 ENDP ;|vp8cx_horizontal_line_3_5_scale_c| 427 428 429 ;/**************************************************************************** 430 ; * 431 ; * ROUTINE : vp8cx_vertical_band_3_5_scale_c 432 ; * 433 ; * INPUTS : unsigned char *dest : Pointer to destination data. 434 ; * unsigned int dest_pitch : Stride of destination data. 435 ; * unsigned int dest_width : Width of destination data. 436 ; * 437 ; * OUTPUTS : None. 438 ; * 439 ; * RETURNS : void 440 ; * 441 ; * FUNCTION : Scales vertical band of pixels by scale 3 to 5. The 442 ; * height of the band scaled is 3-pixels. 443 ; * 444 ; * SPECIAL NOTES : The routine uses the first line of the band below 445 ; * the current band. 446 ; * 447 ; ****************************************************************************/ 448 ;void vertical_band_4_5_scale_armv4 449 ;( 450 ; r0 = UINT8 *dest 451 ; r1 = UINT32 dest_pitch 452 ; r2 = UINT32 dest_width 453 ;) 454 |vertical_band_3_5_scale_armv4| PROC 455 stmdb sp!, {r4 - r11, lr} 456 457 ldr c51_205, =0x3300cd 458 ldr c102_154, =0x66009a 459 460 vl35_loop 461 mov r3, src 462 ldrb r4, [r3], r1 ; a = des [0] 463 ldrb r5, [r3], r1 ; b = des [dest_pitch] 464 ldrb r7, [r3], r1 ; c = des[dest_pitch*2] 465 add lr, src, r1 466 467 orr r8, r4, r5, lsl #16 ; b | a 468 mul r6, c102_154, r8 ; a * 102 + 154 * b 469 470 ldrb r8, [r3, r1, lsl #1] ; d = des[dest_pitch*5] 471 orr r3, r7, r5, lsl #16 ; b | c 472 mul r9, c51_205, r3 ; b * 205 + 51 * c 473 add r6, r6, #0x8000 474 orr r3, r5, r7, lsl #16 ; c | b 475 mov r6, r6, lsr #24 476 strb r6, [lr], r1 477 478 mul r5, c51_205, r3 ; c * 205 + 154 * b 479 add r9, r9, #0x8000 480 orr r3, r8, r7, lsl #16 ; c | d 481 mov r9, r9, lsr #24 482 strb r9, [lr], r1 483 484 mul r7, c102_154, r3 ; c * 154 + 102 * d 485 add r5, r5, #0x8000 486 add src, src, #1 487 mov r5, r5, lsr #24 488 strb r5, [lr], r1 489 490 add r7, r7, #0x8000 491 subs r2, r2, #1 492 mov r7, r7, lsr #24 493 strb r7, [lr], r1 494 495 496 bne vl35_loop 497 498 ldmia sp!, {r4 - r11, pc} 499 ENDP ;|vertical_band_3_5_scale_armv4| 500 501 ;/**************************************************************************** 502 ; * 503 ; * ROUTINE : horizontal_line_3_4_scale_armv4 504 ; * 505 ; * INPUTS : const unsigned char *source : Pointer to source data. 506 ; * unsigned int source_width : Stride of source. 507 ; * unsigned char *dest : Pointer to destination data. 508 ; * unsigned int dest_width : Stride of destination (NOT USED). 509 ; * 510 ; * OUTPUTS : None. 511 ; * 512 ; * RETURNS : void 513 ; * 514 ; * FUNCTION : Copies horizontal line of pixels from source to 515 ; * destination scaling up by 3 to 4. 516 ; * 517 ; * SPECIAL NOTES : None. 518 ; * 519 ; * 520 ; ****************************************************************************/ 521 ;void horizontal_line_3_4_scale_armv4 522 ;( 523 ; const unsigned char *source, 524 ; unsigned int source_width, 525 ; unsigned char *dest, 526 ; unsigned int dest_width 527 ;) 528 |horizontal_line_3_4_scale_armv4| PROC 529 stmdb sp!, {r4 - r11, lr} 530 531 ldr r10, =64 532 ldr r11, =192 533 mov r9, #128 534 535 ldrb r4, [src], #1 ; a = src[0] 536 537 hl34_loop 538 539 ldrb r8, [src], #1 ; b = src[1] 540 ldrb r7, [src], #1 ; c = src[2] 541 strb r4, [dest], #1 542 543 mla r4, r10, r4, r9 ; a*64 + 128 544 mla r4, r11, r8, r4 ; a*64 + b*192 + 1 545 546 add r8, r8, #1 ; b + 1 547 add r8, r8, r7 ; b + c + 1 548 mov r8, r8, asr #1 ; (b + c + 1) >> 1 549 550 mov r4, r4, asr #8 ; (a*64 + b*192 + 1) >> 8 551 strb r4, [dest], #1 552 553 strb r8, [dest], #1 554 555 ldrb r4, [src], #1 ; [a+1] 556 557 mla r7, r11, r7, r9 ; c*192 + 128 558 mla r7, r4, r10, r7 ; a*64 + b*192 + 128 559 560 subs srcw, srcw, #3 561 562 mov r7, r7, asr #8 ; (a*64 + b*192 + 128) >> 8 563 strb r7, [dest], #1 564 565 bpl hl34_loop 566 567 ldrb r8, [src], #1 ; b = src[1] 568 ldrb r7, [src], #1 ; c = src[2] 569 strb r4, [dest], #1 570 571 mla r4, r10, r4, r9 ; a*64 + 128 572 mla r4, r11, r8, r4 ; a*64 + b*192 + 1 573 mov r4, r4, asr #8 ; (a*64 + b*192 + 1) >> 8 574 strb r4, [dest], #1 575 576 add r8, r8, #1 ; b + 1 577 add r8, r8, r7 ; b + c + 1 578 mov r8, r8, asr #1 ; (b + c + 1) >> 1 579 strb r8, [dest], #1 580 strb r7, [dest], #1 581 582 ldmia sp!, {r4 - r11, pc} 583 ENDP ;|vp8cx_horizontal_line_3_4_scale_c| 584 585 586 ;/**************************************************************************** 587 ; * 588 ; * ROUTINE : vertical_band_3_4_scale_armv4 589 ; * 590 ; * INPUTS : unsigned char *dest : Pointer to destination data. 591 ; * unsigned int dest_pitch : Stride of destination data. 592 ; * unsigned int dest_width : Width of destination data. 593 ; * 594 ; * OUTPUTS : None. 595 ; * 596 ; * RETURNS : void 597 ; * 598 ; * FUNCTION : Scales vertical band of pixels by scale 3 to 4. The 599 ; * height of the band scaled is 3-pixels. 600 ; * 601 ; * SPECIAL NOTES : The routine uses the first line of the band below 602 ; * the current band. 603 ; * 604 ; ****************************************************************************/ 605 ;void vertical_band_3_4_scale_armv4 606 ;( 607 ; r0 = UINT8 *dest 608 ; r1 = UINT32 dest_pitch 609 ; r2 = UINT32 dest_width 610 ;) 611 |vertical_band_3_4_scale_armv4| PROC 612 stmdb sp!, {r4 - r11, lr} 613 614 ldr r10, =64 615 ldr r11, =192 616 mov r9, #128 617 618 ; ldr r1,[r1] 619 vl34_loop 620 mov r3, src 621 ldrb r4, [r3], r1 ; a = des [0] 622 ldrb r5, [r3], r1 ; b = des [dest_pitch] 623 ldrb r7, [r3], r1 ; c = des [dest_pitch*2] 624 add lr, src, r1 625 626 mla r4, r10, r4, r9 ; a*64 + 128 627 mla r4, r11, r5, r4 ; a*64 + b*192 + 1 628 629 add r5, r5, #1 ; b + 1 630 add r5, r5, r7 ; b + c + 1 631 mov r5, r5, asr #1 ; (b + c + 1) >> 1 632 633 mov r4, r4, asr #8 ; (a*64 + b*192 + 1) >> 8 634 strb r4, [lr], r1 635 636 ldrb r4, [r3, r1] ; a = des [dest_pitch*4] 637 638 strb r5, [lr], r1 639 640 mla r7, r11, r7, r9 ; c*192 + 128 641 mla r7, r4, r10, r7 ; a*64 + b*192 + 128 642 mov r7, r7, asr #8 ; (a*64 + b*192 + 128) >> 8 643 644 add src, src, #1 645 subs r2, r2, #1 646 647 strb r7, [lr] 648 649 bne vl34_loop 650 651 ldmia sp!, {r4 - r11, pc} 652 ENDP ;|vertical_band_3_4_scale_armv4| 653 654 ;/**************************************************************************** 655 ; * 656 ; * ROUTINE : vp8cx_horizontal_line_1_2_scale_c 657 ; * 658 ; * INPUTS : const unsigned char *source : Pointer to source data. 659 ; * unsigned int source_width : Stride of source. 660 ; * unsigned char *dest : Pointer to destination data. 661 ; * unsigned int dest_width : Stride of destination (NOT USED). 662 ; * 663 ; * OUTPUTS : None. 664 ; * 665 ; * RETURNS : void 666 ; * 667 ; * FUNCTION : Copies horizontal line of pixels from source to 668 ; * destination scaling up by 1 to 2. 669 ; * 670 ; * SPECIAL NOTES : None. 671 ; * 672 ; ****************************************************************************/ 673 ;void vp8cx_horizontal_line_1_2_scale_c 674 ;( 675 ; const unsigned char *source, 676 ; unsigned int source_width, 677 ; unsigned char *dest, 678 ; unsigned int dest_width 679 ;) 680 |horizontal_line_1_2_scale_armv4| PROC 681 stmdb sp!, {r4 - r5, lr} 682 683 sub srcw, srcw, #1 684 685 ldrb r3, [src], #1 686 ldrb r4, [src], #1 687 hl12_loop 688 subs srcw, srcw, #1 689 690 add r5, r3, r4 691 add r5, r5, #1 692 mov r5, r5, lsr #1 693 694 orr r5, r3, r5, lsl #8 695 strh r5, [dest], #2 696 697 mov r3, r4 698 699 ldrneb r4, [src], #1 700 bne hl12_loop 701 702 orr r5, r4, r4, lsl #8 703 strh r5, [dest] 704 705 ldmia sp!, {r4 - r5, pc} 706 ENDP ;|vertical_band_3_5_scale_armv4| 707 708 ;/**************************************************************************** 709 ; * 710 ; * ROUTINE : vp8cx_vertical_band_1_2_scale_c 711 ; * 712 ; * INPUTS : unsigned char *dest : Pointer to destination data. 713 ; * unsigned int dest_pitch : Stride of destination data. 714 ; * unsigned int dest_width : Width of destination data. 715 ; * 716 ; * OUTPUTS : None. 717 ; * 718 ; * RETURNS : void 719 ; * 720 ; * FUNCTION : Scales vertical band of pixels by scale 1 to 2. The 721 ; * height of the band scaled is 1-pixel. 722 ; * 723 ; * SPECIAL NOTES : The routine uses the first line of the band below 724 ; * the current band. 725 ; * 726 ; ****************************************************************************/ 727 ;void vp8cx_vertical_band_1_2_scale_c 728 ;( 729 ; r0 = UINT8 *dest 730 ; r1 = UINT32 dest_pitch 731 ; r2 = UINT32 dest_width 732 ;) 733 |vertical_band_1_2_scale_armv4| PROC 734 stmdb sp!, {r4 - r7, lr} 735 736 ldr mask, =0xff00ff ; mask for selection 737 ldr lr, = 0x010001 738 739 vl12_loop 740 mov r3, src 741 ldr r4, [r3], r1 742 ldr r5, [r3, r1] 743 744 add src, src, #4 745 subs r2, r2, #4 746 747 and r6, r4, mask 748 and r7, r5, mask 749 750 add r6, r7, r6 751 add r6, r6, lr 752 753 and r4, mask, r4, lsr #8 754 and r5, mask, r5, lsr #8 755 756 mov r6, r6, lsr #1 757 and r6, r6, mask 758 759 add r4, r5, r4 760 add r4, r4, lr 761 762 mov r4, r4, lsr #1 763 and r4, r4, mask 764 765 orr r5, r6, r4, lsl #8 766 767 str r5, [r3] 768 769 bpl vl12_loop 770 771 ldmia sp!, {r4 - r7, pc} 772 ENDP ;|vertical_band_3_5_scale_armv4| 773 774 END 775
