1/* 2 * Copyright 2009 The Android Open Source Project 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#include <emmintrin.h> 9#include "SkBitmapProcState_opts_SSE2.h" 10#include "SkBitmapProcState_utils.h" 11#include "SkColorPriv.h" 12#include "SkPaint.h" 13#include "SkUtils.h" 14 15void S32_opaque_D32_filter_DX_SSE2(const SkBitmapProcState& s, 16 const uint32_t* xy, 17 int count, uint32_t* colors) { 18 SkASSERT(count > 0 && colors != nullptr); 19 SkASSERT(s.fFilterQuality != kNone_SkFilterQuality); 20 SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); 21 SkASSERT(s.fAlphaScale == 256); 22 23 const char* srcAddr = static_cast<const char*>(s.fPixmap.addr()); 24 size_t rb = s.fPixmap.rowBytes(); 25 uint32_t XY = *xy++; 26 unsigned y0 = XY >> 14; 27 const uint32_t* row0 = reinterpret_cast<const uint32_t*>(srcAddr + (y0 >> 4) * rb); 28 const uint32_t* row1 = reinterpret_cast<const uint32_t*>(srcAddr + (XY & 0x3FFF) * rb); 29 unsigned subY = y0 & 0xF; 30 31 // ( 0, 0, 0, 0, 0, 0, 0, 16) 32 __m128i sixteen = _mm_cvtsi32_si128(16); 33 34 // ( 0, 0, 0, 0, 16, 16, 16, 16) 35 sixteen = _mm_shufflelo_epi16(sixteen, 0); 36 37 // ( 0, 0, 0, 0, 0, 0, 0, y) 38 __m128i allY = _mm_cvtsi32_si128(subY); 39 40 // ( 0, 0, 0, 0, y, y, y, y) 41 allY = _mm_shufflelo_epi16(allY, 0); 42 43 // ( 0, 0, 0, 0, 16-y, 16-y, 16-y, 16-y) 44 __m128i negY = _mm_sub_epi16(sixteen, allY); 45 46 // (16-y, 16-y, 16-y, 16-y, y, y, y, y) 47 allY = _mm_unpacklo_epi64(allY, negY); 48 49 // (16, 16, 16, 16, 16, 16, 16, 16 ) 50 sixteen = _mm_shuffle_epi32(sixteen, 0); 51 52 // ( 0, 0, 0, 0, 0, 0, 0, 0) 53 __m128i zero = _mm_setzero_si128(); 54 do { 55 uint32_t XX = *xy++; // x0:14 | 4 | x1:14 56 unsigned x0 = XX >> 18; 57 unsigned x1 = XX & 0x3FFF; 58 59 // (0, 0, 0, 0, 0, 0, 0, x) 60 __m128i allX = _mm_cvtsi32_si128((XX >> 14) & 0x0F); 61 62 // (0, 0, 0, 0, x, x, x, x) 63 allX = _mm_shufflelo_epi16(allX, 0); 64 65 // (x, x, x, x, x, x, x, x) 66 allX = _mm_shuffle_epi32(allX, 0); 67 68 // (16-x, 16-x, 16-x, 16-x, 16-x, 16-x, 16-x) 69 __m128i negX = _mm_sub_epi16(sixteen, allX); 70 71 // Load 4 samples (pixels). 72 __m128i a00 = _mm_cvtsi32_si128(row0[x0]); 73 __m128i a01 = _mm_cvtsi32_si128(row0[x1]); 74 __m128i a10 = _mm_cvtsi32_si128(row1[x0]); 75 __m128i a11 = _mm_cvtsi32_si128(row1[x1]); 76 77 // (0, 0, a00, a10) 78 __m128i a00a10 = _mm_unpacklo_epi32(a10, a00); 79 80 // Expand to 16 bits per component. 81 a00a10 = _mm_unpacklo_epi8(a00a10, zero); 82 83 // ((a00 * (16-y)), (a10 * y)). 84 a00a10 = _mm_mullo_epi16(a00a10, allY); 85 86 // (a00 * (16-y) * (16-x), a10 * y * (16-x)). 87 a00a10 = _mm_mullo_epi16(a00a10, negX); 88 89 // (0, 0, a01, a10) 90 __m128i a01a11 = _mm_unpacklo_epi32(a11, a01); 91 92 // Expand to 16 bits per component. 93 a01a11 = _mm_unpacklo_epi8(a01a11, zero); 94 95 // (a01 * (16-y)), (a11 * y) 96 a01a11 = _mm_mullo_epi16(a01a11, allY); 97 98 // (a01 * (16-y) * x), (a11 * y * x) 99 a01a11 = _mm_mullo_epi16(a01a11, allX); 100 101 // (a00*w00 + a01*w01, a10*w10 + a11*w11) 102 __m128i sum = _mm_add_epi16(a00a10, a01a11); 103 104 // (DC, a00*w00 + a01*w01) 105 __m128i shifted = _mm_shuffle_epi32(sum, 0xEE); 106 107 // (DC, a00*w00 + a01*w01 + a10*w10 + a11*w11) 108 sum = _mm_add_epi16(sum, shifted); 109 110 // Divide each 16 bit component by 256. 111 sum = _mm_srli_epi16(sum, 8); 112 113 // Pack lower 4 16 bit values of sum into lower 4 bytes. 114 sum = _mm_packus_epi16(sum, zero); 115 116 // Extract low int and store. 117 *colors++ = _mm_cvtsi128_si32(sum); 118 } while (--count > 0); 119} 120 121void S32_alpha_D32_filter_DX_SSE2(const SkBitmapProcState& s, 122 const uint32_t* xy, 123 int count, uint32_t* colors) { 124 SkASSERT(count > 0 && colors != nullptr); 125 SkASSERT(s.fFilterQuality != kNone_SkFilterQuality); 126 SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); 127 SkASSERT(s.fAlphaScale < 256); 128 129 const char* srcAddr = static_cast<const char*>(s.fPixmap.addr()); 130 size_t rb = s.fPixmap.rowBytes(); 131 uint32_t XY = *xy++; 132 unsigned y0 = XY >> 14; 133 const uint32_t* row0 = reinterpret_cast<const uint32_t*>(srcAddr + (y0 >> 4) * rb); 134 const uint32_t* row1 = reinterpret_cast<const uint32_t*>(srcAddr + (XY & 0x3FFF) * rb); 135 unsigned subY = y0 & 0xF; 136 137 // ( 0, 0, 0, 0, 0, 0, 0, 16) 138 __m128i sixteen = _mm_cvtsi32_si128(16); 139 140 // ( 0, 0, 0, 0, 16, 16, 16, 16) 141 sixteen = _mm_shufflelo_epi16(sixteen, 0); 142 143 // ( 0, 0, 0, 0, 0, 0, 0, y) 144 __m128i allY = _mm_cvtsi32_si128(subY); 145 146 // ( 0, 0, 0, 0, y, y, y, y) 147 allY = _mm_shufflelo_epi16(allY, 0); 148 149 // ( 0, 0, 0, 0, 16-y, 16-y, 16-y, 16-y) 150 __m128i negY = _mm_sub_epi16(sixteen, allY); 151 152 // (16-y, 16-y, 16-y, 16-y, y, y, y, y) 153 allY = _mm_unpacklo_epi64(allY, negY); 154 155 // (16, 16, 16, 16, 16, 16, 16, 16 ) 156 sixteen = _mm_shuffle_epi32(sixteen, 0); 157 158 // ( 0, 0, 0, 0, 0, 0, 0, 0) 159 __m128i zero = _mm_setzero_si128(); 160 161 // ( alpha, alpha, alpha, alpha, alpha, alpha, alpha, alpha ) 162 __m128i alpha = _mm_set1_epi16(s.fAlphaScale); 163 164 do { 165 uint32_t XX = *xy++; // x0:14 | 4 | x1:14 166 unsigned x0 = XX >> 18; 167 unsigned x1 = XX & 0x3FFF; 168 169 // (0, 0, 0, 0, 0, 0, 0, x) 170 __m128i allX = _mm_cvtsi32_si128((XX >> 14) & 0x0F); 171 172 // (0, 0, 0, 0, x, x, x, x) 173 allX = _mm_shufflelo_epi16(allX, 0); 174 175 // (x, x, x, x, x, x, x, x) 176 allX = _mm_shuffle_epi32(allX, 0); 177 178 // (16-x, 16-x, 16-x, 16-x, 16-x, 16-x, 16-x) 179 __m128i negX = _mm_sub_epi16(sixteen, allX); 180 181 // Load 4 samples (pixels). 182 __m128i a00 = _mm_cvtsi32_si128(row0[x0]); 183 __m128i a01 = _mm_cvtsi32_si128(row0[x1]); 184 __m128i a10 = _mm_cvtsi32_si128(row1[x0]); 185 __m128i a11 = _mm_cvtsi32_si128(row1[x1]); 186 187 // (0, 0, a00, a10) 188 __m128i a00a10 = _mm_unpacklo_epi32(a10, a00); 189 190 // Expand to 16 bits per component. 191 a00a10 = _mm_unpacklo_epi8(a00a10, zero); 192 193 // ((a00 * (16-y)), (a10 * y)). 194 a00a10 = _mm_mullo_epi16(a00a10, allY); 195 196 // (a00 * (16-y) * (16-x), a10 * y * (16-x)). 197 a00a10 = _mm_mullo_epi16(a00a10, negX); 198 199 // (0, 0, a01, a10) 200 __m128i a01a11 = _mm_unpacklo_epi32(a11, a01); 201 202 // Expand to 16 bits per component. 203 a01a11 = _mm_unpacklo_epi8(a01a11, zero); 204 205 // (a01 * (16-y)), (a11 * y) 206 a01a11 = _mm_mullo_epi16(a01a11, allY); 207 208 // (a01 * (16-y) * x), (a11 * y * x) 209 a01a11 = _mm_mullo_epi16(a01a11, allX); 210 211 // (a00*w00 + a01*w01, a10*w10 + a11*w11) 212 __m128i sum = _mm_add_epi16(a00a10, a01a11); 213 214 // (DC, a00*w00 + a01*w01) 215 __m128i shifted = _mm_shuffle_epi32(sum, 0xEE); 216 217 // (DC, a00*w00 + a01*w01 + a10*w10 + a11*w11) 218 sum = _mm_add_epi16(sum, shifted); 219 220 // Divide each 16 bit component by 256. 221 sum = _mm_srli_epi16(sum, 8); 222 223 // Multiply by alpha. 224 sum = _mm_mullo_epi16(sum, alpha); 225 226 // Divide each 16 bit component by 256. 227 sum = _mm_srli_epi16(sum, 8); 228 229 // Pack lower 4 16 bit values of sum into lower 4 bytes. 230 sum = _mm_packus_epi16(sum, zero); 231 232 // Extract low int and store. 233 *colors++ = _mm_cvtsi128_si32(sum); 234 } while (--count > 0); 235} 236 237static inline uint32_t ClampX_ClampY_pack_filter(SkFixed f, unsigned max, 238 SkFixed one) { 239 unsigned i = SkClampMax(f >> 16, max); 240 i = (i << 4) | ((f >> 12) & 0xF); 241 return (i << 14) | SkClampMax((f + one) >> 16, max); 242} 243 244/* SSE version of ClampX_ClampY_filter_scale() 245 * portable version is in core/SkBitmapProcState_matrix.h 246 */ 247void ClampX_ClampY_filter_scale_SSE2(const SkBitmapProcState& s, uint32_t xy[], 248 int count, int x, int y) { 249 SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | 250 SkMatrix::kScale_Mask)) == 0); 251 SkASSERT(s.fInvKy == 0); 252 253 const unsigned maxX = s.fPixmap.width() - 1; 254 const SkFixed one = s.fFilterOneX; 255 const SkFixed dx = s.fInvSx; 256 257 const SkBitmapProcStateAutoMapper mapper(s, x, y); 258 const SkFixed fy = mapper.fixedY(); 259 const unsigned maxY = s.fPixmap.height() - 1; 260 // compute our two Y values up front 261 *xy++ = ClampX_ClampY_pack_filter(fy, maxY, s.fFilterOneY); 262 // now initialize fx 263 SkFixed fx = mapper.fixedX(); 264 265 // test if we don't need to apply the tile proc 266 if (can_truncate_to_fixed_for_decal(fx, dx, count, maxX)) { 267 if (count >= 4) { 268 // SSE version of decal_filter_scale 269 while ((size_t(xy) & 0x0F) != 0) { 270 SkASSERT((fx >> (16 + 14)) == 0); 271 *xy++ = (fx >> 12 << 14) | ((fx >> 16) + 1); 272 fx += dx; 273 count--; 274 } 275 276 __m128i wide_1 = _mm_set1_epi32(1); 277 __m128i wide_dx4 = _mm_set1_epi32(dx * 4); 278 __m128i wide_fx = _mm_set_epi32(fx + dx * 3, fx + dx * 2, 279 fx + dx, fx); 280 281 while (count >= 4) { 282 __m128i wide_out; 283 284 wide_out = _mm_slli_epi32(_mm_srai_epi32(wide_fx, 12), 14); 285 wide_out = _mm_or_si128(wide_out, _mm_add_epi32( 286 _mm_srai_epi32(wide_fx, 16), wide_1)); 287 288 _mm_store_si128(reinterpret_cast<__m128i*>(xy), wide_out); 289 290 xy += 4; 291 fx += dx * 4; 292 wide_fx = _mm_add_epi32(wide_fx, wide_dx4); 293 count -= 4; 294 } // while count >= 4 295 } // if count >= 4 296 297 while (count-- > 0) { 298 SkASSERT((fx >> (16 + 14)) == 0); 299 *xy++ = (fx >> 12 << 14) | ((fx >> 16) + 1); 300 fx += dx; 301 } 302 } else { 303 // SSE2 only support 16bit interger max & min, so only process the case 304 // maxX less than the max 16bit interger. Actually maxX is the bitmap's 305 // height, there should be rare bitmap whose height will be greater 306 // than max 16bit interger in the real world. 307 if ((count >= 4) && (maxX <= 0xFFFF)) { 308 while (((size_t)xy & 0x0F) != 0) { 309 *xy++ = ClampX_ClampY_pack_filter(fx, maxX, one); 310 fx += dx; 311 count--; 312 } 313 314 __m128i wide_fx = _mm_set_epi32(fx + dx * 3, fx + dx * 2, 315 fx + dx, fx); 316 __m128i wide_dx4 = _mm_set1_epi32(dx * 4); 317 __m128i wide_one = _mm_set1_epi32(one); 318 __m128i wide_maxX = _mm_set1_epi32(maxX); 319 __m128i wide_mask = _mm_set1_epi32(0xF); 320 321 while (count >= 4) { 322 __m128i wide_i; 323 __m128i wide_lo; 324 __m128i wide_fx1; 325 326 // i = SkClampMax(f>>16,maxX) 327 wide_i = _mm_max_epi16(_mm_srli_epi32(wide_fx, 16), 328 _mm_setzero_si128()); 329 wide_i = _mm_min_epi16(wide_i, wide_maxX); 330 331 // i<<4 | EXTRACT_LOW_BITS(fx) 332 wide_lo = _mm_srli_epi32(wide_fx, 12); 333 wide_lo = _mm_and_si128(wide_lo, wide_mask); 334 wide_i = _mm_slli_epi32(wide_i, 4); 335 wide_i = _mm_or_si128(wide_i, wide_lo); 336 337 // i<<14 338 wide_i = _mm_slli_epi32(wide_i, 14); 339 340 // SkClampMax(((f+one))>>16,max) 341 wide_fx1 = _mm_add_epi32(wide_fx, wide_one); 342 wide_fx1 = _mm_max_epi16(_mm_srli_epi32(wide_fx1, 16), 343 _mm_setzero_si128()); 344 wide_fx1 = _mm_min_epi16(wide_fx1, wide_maxX); 345 346 // final combination 347 wide_i = _mm_or_si128(wide_i, wide_fx1); 348 _mm_store_si128(reinterpret_cast<__m128i*>(xy), wide_i); 349 350 wide_fx = _mm_add_epi32(wide_fx, wide_dx4); 351 fx += dx * 4; 352 xy += 4; 353 count -= 4; 354 } // while count >= 4 355 } // if count >= 4 356 357 while (count-- > 0) { 358 *xy++ = ClampX_ClampY_pack_filter(fx, maxX, one); 359 fx += dx; 360 } 361 } 362} 363 364/* SSE version of ClampX_ClampY_nofilter_scale() 365 * portable version is in core/SkBitmapProcState_matrix.h 366 */ 367void ClampX_ClampY_nofilter_scale_SSE2(const SkBitmapProcState& s, 368 uint32_t xy[], int count, int x, int y) { 369 SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | 370 SkMatrix::kScale_Mask)) == 0); 371 372 // we store y, x, x, x, x, x 373 const unsigned maxX = s.fPixmap.width() - 1; 374 const SkBitmapProcStateAutoMapper mapper(s, x, y); 375 const unsigned maxY = s.fPixmap.height() - 1; 376 *xy++ = SkClampMax(mapper.intY(), maxY); 377 SkFixed fx = mapper.fixedX(); 378 379 if (0 == maxX) { 380 // all of the following X values must be 0 381 memset(xy, 0, count * sizeof(uint16_t)); 382 return; 383 } 384 385 const SkFixed dx = s.fInvSx; 386 387 // test if we don't need to apply the tile proc 388 if ((unsigned)(fx >> 16) <= maxX && 389 (unsigned)((fx + dx * (count - 1)) >> 16) <= maxX) { 390 // SSE version of decal_nofilter_scale 391 if (count >= 8) { 392 while (((size_t)xy & 0x0F) != 0) { 393 *xy++ = pack_two_shorts(fx >> 16, (fx + dx) >> 16); 394 fx += 2 * dx; 395 count -= 2; 396 } 397 398 __m128i wide_dx4 = _mm_set1_epi32(dx * 4); 399 __m128i wide_dx8 = _mm_add_epi32(wide_dx4, wide_dx4); 400 401 __m128i wide_low = _mm_set_epi32(fx + dx * 3, fx + dx * 2, 402 fx + dx, fx); 403 __m128i wide_high = _mm_add_epi32(wide_low, wide_dx4); 404 405 while (count >= 8) { 406 __m128i wide_out_low = _mm_srli_epi32(wide_low, 16); 407 __m128i wide_out_high = _mm_srli_epi32(wide_high, 16); 408 409 __m128i wide_result = _mm_packs_epi32(wide_out_low, 410 wide_out_high); 411 _mm_store_si128(reinterpret_cast<__m128i*>(xy), wide_result); 412 413 wide_low = _mm_add_epi32(wide_low, wide_dx8); 414 wide_high = _mm_add_epi32(wide_high, wide_dx8); 415 416 xy += 4; 417 fx += dx * 8; 418 count -= 8; 419 } 420 } // if count >= 8 421 422 uint16_t* xx = reinterpret_cast<uint16_t*>(xy); 423 while (count-- > 0) { 424 *xx++ = SkToU16(fx >> 16); 425 fx += dx; 426 } 427 } else { 428 // SSE2 only support 16bit interger max & min, so only process the case 429 // maxX less than the max 16bit interger. Actually maxX is the bitmap's 430 // height, there should be rare bitmap whose height will be greater 431 // than max 16bit interger in the real world. 432 if ((count >= 8) && (maxX <= 0xFFFF)) { 433 while (((size_t)xy & 0x0F) != 0) { 434 *xy++ = pack_two_shorts(SkClampMax((fx + dx) >> 16, maxX), 435 SkClampMax(fx >> 16, maxX)); 436 fx += 2 * dx; 437 count -= 2; 438 } 439 440 __m128i wide_dx4 = _mm_set1_epi32(dx * 4); 441 __m128i wide_dx8 = _mm_add_epi32(wide_dx4, wide_dx4); 442 443 __m128i wide_low = _mm_set_epi32(fx + dx * 3, fx + dx * 2, 444 fx + dx, fx); 445 __m128i wide_high = _mm_add_epi32(wide_low, wide_dx4); 446 __m128i wide_maxX = _mm_set1_epi32(maxX); 447 448 while (count >= 8) { 449 __m128i wide_out_low = _mm_srli_epi32(wide_low, 16); 450 __m128i wide_out_high = _mm_srli_epi32(wide_high, 16); 451 452 wide_out_low = _mm_max_epi16(wide_out_low, 453 _mm_setzero_si128()); 454 wide_out_low = _mm_min_epi16(wide_out_low, wide_maxX); 455 wide_out_high = _mm_max_epi16(wide_out_high, 456 _mm_setzero_si128()); 457 wide_out_high = _mm_min_epi16(wide_out_high, wide_maxX); 458 459 __m128i wide_result = _mm_packs_epi32(wide_out_low, 460 wide_out_high); 461 _mm_store_si128(reinterpret_cast<__m128i*>(xy), wide_result); 462 463 wide_low = _mm_add_epi32(wide_low, wide_dx8); 464 wide_high = _mm_add_epi32(wide_high, wide_dx8); 465 466 xy += 4; 467 fx += dx * 8; 468 count -= 8; 469 } 470 } // if count >= 8 471 472 uint16_t* xx = reinterpret_cast<uint16_t*>(xy); 473 while (count-- > 0) { 474 *xx++ = SkClampMax(fx >> 16, maxX); 475 fx += dx; 476 } 477 } 478} 479 480/* SSE version of ClampX_ClampY_filter_affine() 481 * portable version is in core/SkBitmapProcState_matrix.h 482 */ 483void ClampX_ClampY_filter_affine_SSE2(const SkBitmapProcState& s, 484 uint32_t xy[], int count, int x, int y) { 485 const SkBitmapProcStateAutoMapper mapper(s, x, y); 486 487 SkFixed oneX = s.fFilterOneX; 488 SkFixed oneY = s.fFilterOneY; 489 SkFixed fx = mapper.fixedX(); 490 SkFixed fy = mapper.fixedY(); 491 SkFixed dx = s.fInvSx; 492 SkFixed dy = s.fInvKy; 493 unsigned maxX = s.fPixmap.width() - 1; 494 unsigned maxY = s.fPixmap.height() - 1; 495 496 if (count >= 2 && (maxX <= 0xFFFF)) { 497 SkFixed dx2 = dx + dx; 498 SkFixed dy2 = dy + dy; 499 500 __m128i wide_f = _mm_set_epi32(fx + dx, fy + dy, fx, fy); 501 __m128i wide_d2 = _mm_set_epi32(dx2, dy2, dx2, dy2); 502 __m128i wide_one = _mm_set_epi32(oneX, oneY, oneX, oneY); 503 __m128i wide_max = _mm_set_epi32(maxX, maxY, maxX, maxY); 504 __m128i wide_mask = _mm_set1_epi32(0xF); 505 506 while (count >= 2) { 507 // i = SkClampMax(f>>16,maxX) 508 __m128i wide_i = _mm_max_epi16(_mm_srli_epi32(wide_f, 16), 509 _mm_setzero_si128()); 510 wide_i = _mm_min_epi16(wide_i, wide_max); 511 512 // i<<4 | EXTRACT_LOW_BITS(f) 513 __m128i wide_lo = _mm_srli_epi32(wide_f, 12); 514 wide_lo = _mm_and_si128(wide_lo, wide_mask); 515 wide_i = _mm_slli_epi32(wide_i, 4); 516 wide_i = _mm_or_si128(wide_i, wide_lo); 517 518 // i<<14 519 wide_i = _mm_slli_epi32(wide_i, 14); 520 521 // SkClampMax(((f+one))>>16,max) 522 __m128i wide_f1 = _mm_add_epi32(wide_f, wide_one); 523 wide_f1 = _mm_max_epi16(_mm_srli_epi32(wide_f1, 16), 524 _mm_setzero_si128()); 525 wide_f1 = _mm_min_epi16(wide_f1, wide_max); 526 527 // final combination 528 wide_i = _mm_or_si128(wide_i, wide_f1); 529 _mm_storeu_si128(reinterpret_cast<__m128i*>(xy), wide_i); 530 531 wide_f = _mm_add_epi32(wide_f, wide_d2); 532 533 fx += dx2; 534 fy += dy2; 535 xy += 4; 536 count -= 2; 537 } // while count >= 2 538 } // if count >= 2 539 540 while (count-- > 0) { 541 *xy++ = ClampX_ClampY_pack_filter(fy, maxY, oneY); 542 fy += dy; 543 *xy++ = ClampX_ClampY_pack_filter(fx, maxX, oneX); 544 fx += dx; 545 } 546} 547 548/* SSE version of ClampX_ClampY_nofilter_affine() 549 * portable version is in core/SkBitmapProcState_matrix.h 550 */ 551void ClampX_ClampY_nofilter_affine_SSE2(const SkBitmapProcState& s, 552 uint32_t xy[], int count, int x, int y) { 553 SkASSERT(s.fInvType & SkMatrix::kAffine_Mask); 554 SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | 555 SkMatrix::kScale_Mask | 556 SkMatrix::kAffine_Mask)) == 0); 557 558 const SkBitmapProcStateAutoMapper mapper(s, x, y); 559 560 SkFixed fx = mapper.fixedX(); 561 SkFixed fy = mapper.fixedY(); 562 SkFixed dx = s.fInvSx; 563 SkFixed dy = s.fInvKy; 564 int maxX = s.fPixmap.width() - 1; 565 int maxY = s.fPixmap.height() - 1; 566 567 if (count >= 4 && (maxX <= 0xFFFF)) { 568 while (((size_t)xy & 0x0F) != 0) { 569 *xy++ = (SkClampMax(fy >> 16, maxY) << 16) | 570 SkClampMax(fx >> 16, maxX); 571 fx += dx; 572 fy += dy; 573 count--; 574 } 575 576 SkFixed dx4 = dx * 4; 577 SkFixed dy4 = dy * 4; 578 579 __m128i wide_fx = _mm_set_epi32(fx + dx * 3, fx + dx * 2, 580 fx + dx, fx); 581 __m128i wide_fy = _mm_set_epi32(fy + dy * 3, fy + dy * 2, 582 fy + dy, fy); 583 __m128i wide_dx4 = _mm_set1_epi32(dx4); 584 __m128i wide_dy4 = _mm_set1_epi32(dy4); 585 586 __m128i wide_maxX = _mm_set1_epi32(maxX); 587 __m128i wide_maxY = _mm_set1_epi32(maxY); 588 589 while (count >= 4) { 590 // SkClampMax(fx>>16,maxX) 591 __m128i wide_lo = _mm_max_epi16(_mm_srli_epi32(wide_fx, 16), 592 _mm_setzero_si128()); 593 wide_lo = _mm_min_epi16(wide_lo, wide_maxX); 594 595 // SkClampMax(fy>>16,maxY) 596 __m128i wide_hi = _mm_max_epi16(_mm_srli_epi32(wide_fy, 16), 597 _mm_setzero_si128()); 598 wide_hi = _mm_min_epi16(wide_hi, wide_maxY); 599 600 // final combination 601 __m128i wide_i = _mm_or_si128(_mm_slli_epi32(wide_hi, 16), 602 wide_lo); 603 _mm_store_si128(reinterpret_cast<__m128i*>(xy), wide_i); 604 605 wide_fx = _mm_add_epi32(wide_fx, wide_dx4); 606 wide_fy = _mm_add_epi32(wide_fy, wide_dy4); 607 608 fx += dx4; 609 fy += dy4; 610 xy += 4; 611 count -= 4; 612 } // while count >= 4 613 } // if count >= 4 614 615 while (count-- > 0) { 616 *xy++ = (SkClampMax(fy >> 16, maxY) << 16) | 617 SkClampMax(fx >> 16, maxX); 618 fx += dx; 619 fy += dy; 620 } 621} 622