yuv_sse41.c (24716B)
1 // Copyright 2014 Google Inc. All Rights Reserved. 2 // 3 // Use of this source code is governed by a BSD-style license 4 // that can be found in the COPYING file in the root of the source 5 // tree. An additional intellectual property rights grant can be found 6 // in the file PATENTS. All contributing project authors may 7 // be found in the AUTHORS file in the root of the source tree. 8 // ----------------------------------------------------------------------------- 9 // 10 // YUV->RGB conversion functions 11 // 12 // Author: Skal (pascal.massimino@gmail.com) 13 14 #include "src/dsp/yuv.h" 15 16 #if defined(WEBP_USE_SSE41) 17 #include <emmintrin.h> 18 #include <smmintrin.h> 19 20 #include <stdlib.h> 21 22 #include "src/dsp/common_sse41.h" 23 #include "src/dsp/cpu.h" 24 #include "src/dsp/dsp.h" 25 #include "src/utils/utils.h" 26 #include "src/webp/decode.h" 27 #include "src/webp/types.h" 28 29 //----------------------------------------------------------------------------- 30 // Convert spans of 32 pixels to various RGB formats for the fancy upsampler. 31 32 // These constants are 14b fixed-point version of ITU-R BT.601 constants. 33 // R = (19077 * y + 26149 * v - 14234) >> 6 34 // G = (19077 * y - 6419 * u - 13320 * v + 8708) >> 6 35 // B = (19077 * y + 33050 * u - 17685) >> 6 36 static void ConvertYUV444ToRGB_SSE41(const __m128i* const Y0, 37 const __m128i* const U0, 38 const __m128i* const V0, 39 __m128i* const R, 40 __m128i* const G, 41 __m128i* const B) { 42 const __m128i k19077 = _mm_set1_epi16(19077); 43 const __m128i k26149 = _mm_set1_epi16(26149); 44 const __m128i k14234 = _mm_set1_epi16(14234); 45 // 33050 doesn't fit in a signed short: only use this with unsigned arithmetic 46 const __m128i k33050 = _mm_set1_epi16((short)33050); 47 const __m128i k17685 = _mm_set1_epi16(17685); 48 const __m128i k6419 = _mm_set1_epi16(6419); 49 const __m128i k13320 = _mm_set1_epi16(13320); 50 const __m128i k8708 = _mm_set1_epi16(8708); 51 52 const __m128i Y1 = _mm_mulhi_epu16(*Y0, k19077); 53 54 const __m128i R0 = _mm_mulhi_epu16(*V0, k26149); 55 const __m128i R1 = _mm_sub_epi16(Y1, k14234); 56 const __m128i R2 = _mm_add_epi16(R1, R0); 57 58 const __m128i G0 = _mm_mulhi_epu16(*U0, k6419); 59 const __m128i G1 = _mm_mulhi_epu16(*V0, k13320); 60 const __m128i G2 = _mm_add_epi16(Y1, k8708); 61 const __m128i G3 = _mm_add_epi16(G0, G1); 62 const __m128i G4 = _mm_sub_epi16(G2, G3); 63 64 // be careful with the saturated *unsigned* arithmetic here! 65 const __m128i B0 = _mm_mulhi_epu16(*U0, k33050); 66 const __m128i B1 = _mm_adds_epu16(B0, Y1); 67 const __m128i B2 = _mm_subs_epu16(B1, k17685); 68 69 // use logical shift for B2, which can be larger than 32767 70 *R = _mm_srai_epi16(R2, 6); // range: [-14234, 30815] 71 *G = _mm_srai_epi16(G4, 6); // range: [-10953, 27710] 72 *B = _mm_srli_epi16(B2, 6); // range: [0, 34238] 73 } 74 75 // Load the bytes into the *upper* part of 16b words. That's "<< 8", basically. 76 static WEBP_INLINE __m128i Load_HI_16_SSE41(const uint8_t* src) { 77 const __m128i zero = _mm_setzero_si128(); 78 return _mm_unpacklo_epi8(zero, _mm_loadl_epi64((const __m128i*)src)); 79 } 80 81 // Load and replicate the U/V samples 82 static WEBP_INLINE __m128i Load_UV_HI_8_SSE41(const uint8_t* src) { 83 const __m128i zero = _mm_setzero_si128(); 84 const __m128i tmp0 = _mm_cvtsi32_si128(WebPMemToInt32(src)); 85 const __m128i tmp1 = _mm_unpacklo_epi8(zero, tmp0); 86 return _mm_unpacklo_epi16(tmp1, tmp1); // replicate samples 87 } 88 89 // Convert 32 samples of YUV444 to R/G/B 90 static void YUV444ToRGB_SSE41(const uint8_t* WEBP_RESTRICT const y, 91 const uint8_t* WEBP_RESTRICT const u, 92 const uint8_t* WEBP_RESTRICT const v, 93 __m128i* const R, __m128i* const G, 94 __m128i* const B) { 95 const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_HI_16_SSE41(u), 96 V0 = Load_HI_16_SSE41(v); 97 ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B); 98 } 99 100 // Convert 32 samples of YUV420 to R/G/B 101 static void YUV420ToRGB_SSE41(const uint8_t* WEBP_RESTRICT const y, 102 const uint8_t* WEBP_RESTRICT const u, 103 const uint8_t* WEBP_RESTRICT const v, 104 __m128i* const R, __m128i* const G, 105 __m128i* const B) { 106 const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_UV_HI_8_SSE41(u), 107 V0 = Load_UV_HI_8_SSE41(v); 108 ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B); 109 } 110 111 // Pack the planar buffers 112 // rrrr... rrrr... gggg... gggg... bbbb... bbbb.... 113 // triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ... 114 static WEBP_INLINE void PlanarTo24b_SSE41( 115 __m128i* const in0, __m128i* const in1, __m128i* const in2, 116 __m128i* const in3, __m128i* const in4, __m128i* const in5, 117 uint8_t* WEBP_RESTRICT const rgb) { 118 // The input is 6 registers of sixteen 8b but for the sake of explanation, 119 // let's take 6 registers of four 8b values. 120 // To pack, we will keep taking one every two 8b integer and move it 121 // around as follows: 122 // Input: 123 // r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7 124 // Split the 6 registers in two sets of 3 registers: the first set as the even 125 // 8b bytes, the second the odd ones: 126 // r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7 127 // Repeat the same permutations twice more: 128 // r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7 129 // r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7 130 VP8PlanarTo24b_SSE41(in0, in1, in2, in3, in4, in5); 131 132 _mm_storeu_si128((__m128i*)(rgb + 0), *in0); 133 _mm_storeu_si128((__m128i*)(rgb + 16), *in1); 134 _mm_storeu_si128((__m128i*)(rgb + 32), *in2); 135 _mm_storeu_si128((__m128i*)(rgb + 48), *in3); 136 _mm_storeu_si128((__m128i*)(rgb + 64), *in4); 137 _mm_storeu_si128((__m128i*)(rgb + 80), *in5); 138 } 139 140 void VP8YuvToRgb32_SSE41(const uint8_t* WEBP_RESTRICT y, 141 const uint8_t* WEBP_RESTRICT u, 142 const uint8_t* WEBP_RESTRICT v, 143 uint8_t* WEBP_RESTRICT dst) { 144 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 145 __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5; 146 147 YUV444ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 148 YUV444ToRGB_SSE41(y + 8, u + 8, v + 8, &R1, &G1, &B1); 149 YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2); 150 YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3); 151 152 // Cast to 8b and store as RRRRGGGGBBBB. 153 rgb0 = _mm_packus_epi16(R0, R1); 154 rgb1 = _mm_packus_epi16(R2, R3); 155 rgb2 = _mm_packus_epi16(G0, G1); 156 rgb3 = _mm_packus_epi16(G2, G3); 157 rgb4 = _mm_packus_epi16(B0, B1); 158 rgb5 = _mm_packus_epi16(B2, B3); 159 160 // Pack as RGBRGBRGBRGB. 161 PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst); 162 } 163 164 void VP8YuvToBgr32_SSE41(const uint8_t* WEBP_RESTRICT y, 165 const uint8_t* WEBP_RESTRICT u, 166 const uint8_t* WEBP_RESTRICT v, 167 uint8_t* WEBP_RESTRICT dst) { 168 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 169 __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5; 170 171 YUV444ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 172 YUV444ToRGB_SSE41(y + 8, u + 8, v + 8, &R1, &G1, &B1); 173 YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2); 174 YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3); 175 176 // Cast to 8b and store as BBBBGGGGRRRR. 177 bgr0 = _mm_packus_epi16(B0, B1); 178 bgr1 = _mm_packus_epi16(B2, B3); 179 bgr2 = _mm_packus_epi16(G0, G1); 180 bgr3 = _mm_packus_epi16(G2, G3); 181 bgr4 = _mm_packus_epi16(R0, R1); 182 bgr5= _mm_packus_epi16(R2, R3); 183 184 // Pack as BGRBGRBGRBGR. 185 PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst); 186 } 187 188 //----------------------------------------------------------------------------- 189 // Arbitrary-length row conversion functions 190 191 static void YuvToRgbRow_SSE41(const uint8_t* WEBP_RESTRICT y, 192 const uint8_t* WEBP_RESTRICT u, 193 const uint8_t* WEBP_RESTRICT v, 194 uint8_t* WEBP_RESTRICT dst, int len) { 195 int n; 196 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { 197 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 198 __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5; 199 200 YUV420ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 201 YUV420ToRGB_SSE41(y + 8, u + 4, v + 4, &R1, &G1, &B1); 202 YUV420ToRGB_SSE41(y + 16, u + 8, v + 8, &R2, &G2, &B2); 203 YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3); 204 205 // Cast to 8b and store as RRRRGGGGBBBB. 206 rgb0 = _mm_packus_epi16(R0, R1); 207 rgb1 = _mm_packus_epi16(R2, R3); 208 rgb2 = _mm_packus_epi16(G0, G1); 209 rgb3 = _mm_packus_epi16(G2, G3); 210 rgb4 = _mm_packus_epi16(B0, B1); 211 rgb5 = _mm_packus_epi16(B2, B3); 212 213 // Pack as RGBRGBRGBRGB. 214 PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst); 215 216 y += 32; 217 u += 16; 218 v += 16; 219 } 220 for (; n < len; ++n) { // Finish off 221 VP8YuvToRgb(y[0], u[0], v[0], dst); 222 dst += 3; 223 y += 1; 224 u += (n & 1); 225 v += (n & 1); 226 } 227 } 228 229 static void YuvToBgrRow_SSE41(const uint8_t* WEBP_RESTRICT y, 230 const uint8_t* WEBP_RESTRICT u, 231 const uint8_t* WEBP_RESTRICT v, 232 uint8_t* WEBP_RESTRICT dst, int len) { 233 int n; 234 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { 235 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 236 __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5; 237 238 YUV420ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 239 YUV420ToRGB_SSE41(y + 8, u + 4, v + 4, &R1, &G1, &B1); 240 YUV420ToRGB_SSE41(y + 16, u + 8, v + 8, &R2, &G2, &B2); 241 YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3); 242 243 // Cast to 8b and store as BBBBGGGGRRRR. 244 bgr0 = _mm_packus_epi16(B0, B1); 245 bgr1 = _mm_packus_epi16(B2, B3); 246 bgr2 = _mm_packus_epi16(G0, G1); 247 bgr3 = _mm_packus_epi16(G2, G3); 248 bgr4 = _mm_packus_epi16(R0, R1); 249 bgr5 = _mm_packus_epi16(R2, R3); 250 251 // Pack as BGRBGRBGRBGR. 252 PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst); 253 254 y += 32; 255 u += 16; 256 v += 16; 257 } 258 for (; n < len; ++n) { // Finish off 259 VP8YuvToBgr(y[0], u[0], v[0], dst); 260 dst += 3; 261 y += 1; 262 u += (n & 1); 263 v += (n & 1); 264 } 265 } 266 267 //------------------------------------------------------------------------------ 268 // Entry point 269 270 extern void WebPInitSamplersSSE41(void); 271 272 WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersSSE41(void) { 273 WebPSamplers[MODE_RGB] = YuvToRgbRow_SSE41; 274 WebPSamplers[MODE_BGR] = YuvToBgrRow_SSE41; 275 } 276 277 //------------------------------------------------------------------------------ 278 // RGB24/32 -> YUV converters 279 280 // Load eight 16b-words from *src. 281 #define LOAD_16(src) _mm_loadu_si128((const __m128i*)(src)) 282 // Store either 16b-words into *dst 283 #define STORE_16(V, dst) _mm_storeu_si128((__m128i*)(dst), (V)) 284 285 #define WEBP_SSE41_SHUFF(OUT) do { \ 286 const __m128i tmp0 = _mm_shuffle_epi8(A0, shuff0); \ 287 const __m128i tmp1 = _mm_shuffle_epi8(A1, shuff1); \ 288 const __m128i tmp2 = _mm_shuffle_epi8(A2, shuff2); \ 289 const __m128i tmp3 = _mm_shuffle_epi8(A3, shuff0); \ 290 const __m128i tmp4 = _mm_shuffle_epi8(A4, shuff1); \ 291 const __m128i tmp5 = _mm_shuffle_epi8(A5, shuff2); \ 292 \ 293 /* OR everything to get one channel */ \ 294 const __m128i tmp6 = _mm_or_si128(tmp0, tmp1); \ 295 const __m128i tmp7 = _mm_or_si128(tmp3, tmp4); \ 296 out[OUT + 0] = _mm_or_si128(tmp6, tmp2); \ 297 out[OUT + 1] = _mm_or_si128(tmp7, tmp5); \ 298 } while (0); 299 300 // Unpack the 8b input rgbrgbrgbrgb ... as contiguous registers: 301 // rrrr... rrrr... gggg... gggg... bbbb... bbbb.... 302 // Similar to PlanarTo24bHelper(), but in reverse order. 303 static WEBP_INLINE void RGB24PackedToPlanar_SSE41( 304 const uint8_t* WEBP_RESTRICT const rgb, __m128i* const out /*out[6]*/) { 305 const __m128i A0 = _mm_loadu_si128((const __m128i*)(rgb + 0)); 306 const __m128i A1 = _mm_loadu_si128((const __m128i*)(rgb + 16)); 307 const __m128i A2 = _mm_loadu_si128((const __m128i*)(rgb + 32)); 308 const __m128i A3 = _mm_loadu_si128((const __m128i*)(rgb + 48)); 309 const __m128i A4 = _mm_loadu_si128((const __m128i*)(rgb + 64)); 310 const __m128i A5 = _mm_loadu_si128((const __m128i*)(rgb + 80)); 311 312 // Compute RR. 313 { 314 const __m128i shuff0 = _mm_set_epi8( 315 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0); 316 const __m128i shuff1 = _mm_set_epi8( 317 -1, -1, -1, -1, -1, 14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1); 318 const __m128i shuff2 = _mm_set_epi8( 319 13, 10, 7, 4, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1); 320 WEBP_SSE41_SHUFF(0) 321 } 322 // Compute GG. 323 { 324 const __m128i shuff0 = _mm_set_epi8( 325 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1); 326 const __m128i shuff1 = _mm_set_epi8( 327 -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1); 328 const __m128i shuff2 = _mm_set_epi8( 329 14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1); 330 WEBP_SSE41_SHUFF(2) 331 } 332 // Compute BB. 333 { 334 const __m128i shuff0 = _mm_set_epi8( 335 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 14, 11, 8, 5, 2); 336 const __m128i shuff1 = _mm_set_epi8( 337 -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1, -1, -1, -1, -1, -1); 338 const __m128i shuff2 = _mm_set_epi8( 339 15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1); 340 WEBP_SSE41_SHUFF(4) 341 } 342 } 343 344 #undef WEBP_SSE41_SHUFF 345 346 // Convert 8 packed ARGB to r[], g[], b[] 347 static WEBP_INLINE void RGB32PackedToPlanar_SSE41( 348 const uint32_t* WEBP_RESTRICT const argb, __m128i* const rgb /*in[6]*/) { 349 const __m128i zero = _mm_setzero_si128(); 350 __m128i a0 = LOAD_16(argb + 0); 351 __m128i a1 = LOAD_16(argb + 4); 352 __m128i a2 = LOAD_16(argb + 8); 353 __m128i a3 = LOAD_16(argb + 12); 354 VP8L32bToPlanar_SSE41(&a0, &a1, &a2, &a3); 355 rgb[0] = _mm_unpacklo_epi8(a1, zero); 356 rgb[1] = _mm_unpackhi_epi8(a1, zero); 357 rgb[2] = _mm_unpacklo_epi8(a2, zero); 358 rgb[3] = _mm_unpackhi_epi8(a2, zero); 359 rgb[4] = _mm_unpacklo_epi8(a3, zero); 360 rgb[5] = _mm_unpackhi_epi8(a3, zero); 361 } 362 363 // This macro computes (RG * MULT_RG + GB * MULT_GB + ROUNDER) >> DESCALE_FIX 364 // It's a macro and not a function because we need to use immediate values with 365 // srai_epi32, e.g. 366 #define TRANSFORM(RG_LO, RG_HI, GB_LO, GB_HI, MULT_RG, MULT_GB, \ 367 ROUNDER, DESCALE_FIX, OUT) do { \ 368 const __m128i V0_lo = _mm_madd_epi16(RG_LO, MULT_RG); \ 369 const __m128i V0_hi = _mm_madd_epi16(RG_HI, MULT_RG); \ 370 const __m128i V1_lo = _mm_madd_epi16(GB_LO, MULT_GB); \ 371 const __m128i V1_hi = _mm_madd_epi16(GB_HI, MULT_GB); \ 372 const __m128i V2_lo = _mm_add_epi32(V0_lo, V1_lo); \ 373 const __m128i V2_hi = _mm_add_epi32(V0_hi, V1_hi); \ 374 const __m128i V3_lo = _mm_add_epi32(V2_lo, ROUNDER); \ 375 const __m128i V3_hi = _mm_add_epi32(V2_hi, ROUNDER); \ 376 const __m128i V5_lo = _mm_srai_epi32(V3_lo, DESCALE_FIX); \ 377 const __m128i V5_hi = _mm_srai_epi32(V3_hi, DESCALE_FIX); \ 378 (OUT) = _mm_packs_epi32(V5_lo, V5_hi); \ 379 } while (0) 380 381 #define MK_CST_16(A, B) _mm_set_epi16((B), (A), (B), (A), (B), (A), (B), (A)) 382 static WEBP_INLINE void ConvertRGBToY_SSE41(const __m128i* const R, 383 const __m128i* const G, 384 const __m128i* const B, 385 __m128i* const Y) { 386 const __m128i kRG_y = MK_CST_16(16839, 33059 - 16384); 387 const __m128i kGB_y = MK_CST_16(16384, 6420); 388 const __m128i kHALF_Y = _mm_set1_epi32((16 << YUV_FIX) + YUV_HALF); 389 390 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); 391 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); 392 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); 393 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); 394 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_y, kGB_y, kHALF_Y, YUV_FIX, *Y); 395 } 396 397 static WEBP_INLINE void ConvertRGBToUV_SSE41(const __m128i* const R, 398 const __m128i* const G, 399 const __m128i* const B, 400 __m128i* const U, 401 __m128i* const V) { 402 const __m128i kRG_u = MK_CST_16(-9719, -19081); 403 const __m128i kGB_u = MK_CST_16(0, 28800); 404 const __m128i kRG_v = MK_CST_16(28800, 0); 405 const __m128i kGB_v = MK_CST_16(-24116, -4684); 406 const __m128i kHALF_UV = _mm_set1_epi32(((128 << YUV_FIX) + YUV_HALF) << 2); 407 408 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); 409 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); 410 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); 411 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); 412 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_u, kGB_u, 413 kHALF_UV, YUV_FIX + 2, *U); 414 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_v, kGB_v, 415 kHALF_UV, YUV_FIX + 2, *V); 416 } 417 418 #undef MK_CST_16 419 #undef TRANSFORM 420 421 static void ConvertRGB24ToY_SSE41(const uint8_t* WEBP_RESTRICT rgb, 422 uint8_t* WEBP_RESTRICT y, int width) { 423 const int max_width = width & ~31; 424 int i; 425 for (i = 0; i < max_width; rgb += 3 * 16 * 2) { 426 __m128i rgb_plane[6]; 427 int j; 428 429 RGB24PackedToPlanar_SSE41(rgb, rgb_plane); 430 431 for (j = 0; j < 2; ++j, i += 16) { 432 const __m128i zero = _mm_setzero_si128(); 433 __m128i r, g, b, Y0, Y1; 434 435 // Convert to 16-bit Y. 436 r = _mm_unpacklo_epi8(rgb_plane[0 + j], zero); 437 g = _mm_unpacklo_epi8(rgb_plane[2 + j], zero); 438 b = _mm_unpacklo_epi8(rgb_plane[4 + j], zero); 439 ConvertRGBToY_SSE41(&r, &g, &b, &Y0); 440 441 // Convert to 16-bit Y. 442 r = _mm_unpackhi_epi8(rgb_plane[0 + j], zero); 443 g = _mm_unpackhi_epi8(rgb_plane[2 + j], zero); 444 b = _mm_unpackhi_epi8(rgb_plane[4 + j], zero); 445 ConvertRGBToY_SSE41(&r, &g, &b, &Y1); 446 447 // Cast to 8-bit and store. 448 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 449 } 450 } 451 for (; i < width; ++i, rgb += 3) { // left-over 452 y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF); 453 } 454 } 455 456 static void ConvertBGR24ToY_SSE41(const uint8_t* WEBP_RESTRICT bgr, 457 uint8_t* WEBP_RESTRICT y, int width) { 458 const int max_width = width & ~31; 459 int i; 460 for (i = 0; i < max_width; bgr += 3 * 16 * 2) { 461 __m128i bgr_plane[6]; 462 int j; 463 464 RGB24PackedToPlanar_SSE41(bgr, bgr_plane); 465 466 for (j = 0; j < 2; ++j, i += 16) { 467 const __m128i zero = _mm_setzero_si128(); 468 __m128i r, g, b, Y0, Y1; 469 470 // Convert to 16-bit Y. 471 b = _mm_unpacklo_epi8(bgr_plane[0 + j], zero); 472 g = _mm_unpacklo_epi8(bgr_plane[2 + j], zero); 473 r = _mm_unpacklo_epi8(bgr_plane[4 + j], zero); 474 ConvertRGBToY_SSE41(&r, &g, &b, &Y0); 475 476 // Convert to 16-bit Y. 477 b = _mm_unpackhi_epi8(bgr_plane[0 + j], zero); 478 g = _mm_unpackhi_epi8(bgr_plane[2 + j], zero); 479 r = _mm_unpackhi_epi8(bgr_plane[4 + j], zero); 480 ConvertRGBToY_SSE41(&r, &g, &b, &Y1); 481 482 // Cast to 8-bit and store. 483 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 484 } 485 } 486 for (; i < width; ++i, bgr += 3) { // left-over 487 y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF); 488 } 489 } 490 491 static void ConvertARGBToY_SSE41(const uint32_t* WEBP_RESTRICT argb, 492 uint8_t* WEBP_RESTRICT y, int width) { 493 const int max_width = width & ~15; 494 int i; 495 for (i = 0; i < max_width; i += 16) { 496 __m128i Y0, Y1, rgb[6]; 497 RGB32PackedToPlanar_SSE41(&argb[i], rgb); 498 ConvertRGBToY_SSE41(&rgb[0], &rgb[2], &rgb[4], &Y0); 499 ConvertRGBToY_SSE41(&rgb[1], &rgb[3], &rgb[5], &Y1); 500 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 501 } 502 for (; i < width; ++i) { // left-over 503 const uint32_t p = argb[i]; 504 y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff, 505 YUV_HALF); 506 } 507 } 508 509 // Horizontal add (doubled) of two 16b values, result is 16b. 510 // in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ... 511 static void HorizontalAddPack_SSE41(const __m128i* const A, 512 const __m128i* const B, 513 __m128i* const out) { 514 const __m128i k2 = _mm_set1_epi16(2); 515 const __m128i C = _mm_madd_epi16(*A, k2); 516 const __m128i D = _mm_madd_epi16(*B, k2); 517 *out = _mm_packs_epi32(C, D); 518 } 519 520 static void ConvertARGBToUV_SSE41(const uint32_t* WEBP_RESTRICT argb, 521 uint8_t* WEBP_RESTRICT u, 522 uint8_t* WEBP_RESTRICT v, 523 int src_width, int do_store) { 524 const int max_width = src_width & ~31; 525 int i; 526 for (i = 0; i < max_width; i += 32, u += 16, v += 16) { 527 __m128i rgb[6], U0, V0, U1, V1; 528 RGB32PackedToPlanar_SSE41(&argb[i], rgb); 529 HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]); 530 HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]); 531 HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]); 532 ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U0, &V0); 533 534 RGB32PackedToPlanar_SSE41(&argb[i + 16], rgb); 535 HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]); 536 HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]); 537 HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]); 538 ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U1, &V1); 539 540 U0 = _mm_packus_epi16(U0, U1); 541 V0 = _mm_packus_epi16(V0, V1); 542 if (!do_store) { 543 const __m128i prev_u = LOAD_16(u); 544 const __m128i prev_v = LOAD_16(v); 545 U0 = _mm_avg_epu8(U0, prev_u); 546 V0 = _mm_avg_epu8(V0, prev_v); 547 } 548 STORE_16(U0, u); 549 STORE_16(V0, v); 550 } 551 if (i < src_width) { // left-over 552 WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store); 553 } 554 } 555 556 // Convert 16 packed ARGB 16b-values to r[], g[], b[] 557 static WEBP_INLINE void RGBA32PackedToPlanar_16b_SSE41( 558 const uint16_t* WEBP_RESTRICT const rgbx, 559 __m128i* const r, __m128i* const g, __m128i* const b) { 560 const __m128i in0 = LOAD_16(rgbx + 0); // r0 | g0 | b0 |x| r1 | g1 | b1 |x 561 const __m128i in1 = LOAD_16(rgbx + 8); // r2 | g2 | b2 |x| r3 | g3 | b3 |x 562 const __m128i in2 = LOAD_16(rgbx + 16); // r4 | ... 563 const __m128i in3 = LOAD_16(rgbx + 24); // r6 | ... 564 // aarrggbb as 16-bit. 565 const __m128i shuff0 = 566 _mm_set_epi8(-1, -1, -1, -1, 13, 12, 5, 4, 11, 10, 3, 2, 9, 8, 1, 0); 567 const __m128i shuff1 = 568 _mm_set_epi8(13, 12, 5, 4, -1, -1, -1, -1, 11, 10, 3, 2, 9, 8, 1, 0); 569 const __m128i A0 = _mm_shuffle_epi8(in0, shuff0); 570 const __m128i A1 = _mm_shuffle_epi8(in1, shuff1); 571 const __m128i A2 = _mm_shuffle_epi8(in2, shuff0); 572 const __m128i A3 = _mm_shuffle_epi8(in3, shuff1); 573 // R0R1G0G1 574 // B0B1**** 575 // R2R3G2G3 576 // B2B3**** 577 // (OR is used to free port 5 for the unpack) 578 const __m128i B0 = _mm_unpacklo_epi32(A0, A1); 579 const __m128i B1 = _mm_or_si128(A0, A1); 580 const __m128i B2 = _mm_unpacklo_epi32(A2, A3); 581 const __m128i B3 = _mm_or_si128(A2, A3); 582 // Gather the channels. 583 *r = _mm_unpacklo_epi64(B0, B2); 584 *g = _mm_unpackhi_epi64(B0, B2); 585 *b = _mm_unpackhi_epi64(B1, B3); 586 } 587 588 static void ConvertRGBA32ToUV_SSE41(const uint16_t* WEBP_RESTRICT rgb, 589 uint8_t* WEBP_RESTRICT u, 590 uint8_t* WEBP_RESTRICT v, int width) { 591 const int max_width = width & ~15; 592 const uint16_t* const last_rgb = rgb + 4 * max_width; 593 while (rgb < last_rgb) { 594 __m128i r, g, b, U0, V0, U1, V1; 595 RGBA32PackedToPlanar_16b_SSE41(rgb + 0, &r, &g, &b); 596 ConvertRGBToUV_SSE41(&r, &g, &b, &U0, &V0); 597 RGBA32PackedToPlanar_16b_SSE41(rgb + 32, &r, &g, &b); 598 ConvertRGBToUV_SSE41(&r, &g, &b, &U1, &V1); 599 STORE_16(_mm_packus_epi16(U0, U1), u); 600 STORE_16(_mm_packus_epi16(V0, V1), v); 601 u += 16; 602 v += 16; 603 rgb += 2 * 32; 604 } 605 if (max_width < width) { // left-over 606 WebPConvertRGBA32ToUV_C(rgb, u, v, width - max_width); 607 } 608 } 609 610 //------------------------------------------------------------------------------ 611 612 extern void WebPInitConvertARGBToYUVSSE41(void); 613 614 WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVSSE41(void) { 615 WebPConvertARGBToY = ConvertARGBToY_SSE41; 616 WebPConvertARGBToUV = ConvertARGBToUV_SSE41; 617 618 WebPConvertRGB24ToY = ConvertRGB24ToY_SSE41; 619 WebPConvertBGR24ToY = ConvertBGR24ToY_SSE41; 620 621 WebPConvertRGBA32ToUV = ConvertRGBA32ToUV_SSE41; 622 } 623 624 //------------------------------------------------------------------------------ 625 626 #else // !WEBP_USE_SSE41 627 628 WEBP_DSP_INIT_STUB(WebPInitSamplersSSE41) 629 WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVSSE41) 630 631 #endif // WEBP_USE_SSE41