dec_sse2.c revision 4b2196c929b70f2cdc1c2556580d349db89356d8
1// Copyright 2011 Google Inc. All Rights Reserved. 2// 3// This code is licensed under the same terms as WebM: 4// Software License Agreement: http://www.webmproject.org/license/software/ 5// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ 6// ----------------------------------------------------------------------------- 7// 8// SSE2 version of some decoding functions (idct, loop filtering). 9// 10// Author: somnath@google.com (Somnath Banerjee) 11// cduvivier@google.com (Christian Duvivier) 12 13#include "./dsp.h" 14 15#if defined(__cplusplus) || defined(c_plusplus) 16extern "C" { 17#endif 18 19#if defined(WEBP_USE_SSE2) 20 21#include <emmintrin.h> 22#include "../dec/vp8i.h" 23 24//------------------------------------------------------------------------------ 25// Transforms (Paragraph 14.4) 26 27static void TransformSSE2(const int16_t* in, uint8_t* dst, int do_two) { 28 // This implementation makes use of 16-bit fixed point versions of two 29 // multiply constants: 30 // K1 = sqrt(2) * cos (pi/8) ~= 85627 / 2^16 31 // K2 = sqrt(2) * sin (pi/8) ~= 35468 / 2^16 32 // 33 // To be able to use signed 16-bit integers, we use the following trick to 34 // have constants within range: 35 // - Associated constants are obtained by subtracting the 16-bit fixed point 36 // version of one: 37 // k = K - (1 << 16) => K = k + (1 << 16) 38 // K1 = 85267 => k1 = 20091 39 // K2 = 35468 => k2 = -30068 40 // - The multiplication of a variable by a constant become the sum of the 41 // variable and the multiplication of that variable by the associated 42 // constant: 43 // (x * K) >> 16 = (x * (k + (1 << 16))) >> 16 = ((x * k ) >> 16) + x 44 const __m128i k1 = _mm_set1_epi16(20091); 45 const __m128i k2 = _mm_set1_epi16(-30068); 46 __m128i T0, T1, T2, T3; 47 48 // Load and concatenate the transform coefficients (we'll do two transforms 49 // in parallel). In the case of only one transform, the second half of the 50 // vectors will just contain random value we'll never use nor store. 51 __m128i in0, in1, in2, in3; 52 { 53 in0 = _mm_loadl_epi64((__m128i*)&in[0]); 54 in1 = _mm_loadl_epi64((__m128i*)&in[4]); 55 in2 = _mm_loadl_epi64((__m128i*)&in[8]); 56 in3 = _mm_loadl_epi64((__m128i*)&in[12]); 57 // a00 a10 a20 a30 x x x x 58 // a01 a11 a21 a31 x x x x 59 // a02 a12 a22 a32 x x x x 60 // a03 a13 a23 a33 x x x x 61 if (do_two) { 62 const __m128i inB0 = _mm_loadl_epi64((__m128i*)&in[16]); 63 const __m128i inB1 = _mm_loadl_epi64((__m128i*)&in[20]); 64 const __m128i inB2 = _mm_loadl_epi64((__m128i*)&in[24]); 65 const __m128i inB3 = _mm_loadl_epi64((__m128i*)&in[28]); 66 in0 = _mm_unpacklo_epi64(in0, inB0); 67 in1 = _mm_unpacklo_epi64(in1, inB1); 68 in2 = _mm_unpacklo_epi64(in2, inB2); 69 in3 = _mm_unpacklo_epi64(in3, inB3); 70 // a00 a10 a20 a30 b00 b10 b20 b30 71 // a01 a11 a21 a31 b01 b11 b21 b31 72 // a02 a12 a22 a32 b02 b12 b22 b32 73 // a03 a13 a23 a33 b03 b13 b23 b33 74 } 75 } 76 77 // Vertical pass and subsequent transpose. 78 { 79 // First pass, c and d calculations are longer because of the "trick" 80 // multiplications. 81 const __m128i a = _mm_add_epi16(in0, in2); 82 const __m128i b = _mm_sub_epi16(in0, in2); 83 // c = MUL(in1, K2) - MUL(in3, K1) = MUL(in1, k2) - MUL(in3, k1) + in1 - in3 84 const __m128i c1 = _mm_mulhi_epi16(in1, k2); 85 const __m128i c2 = _mm_mulhi_epi16(in3, k1); 86 const __m128i c3 = _mm_sub_epi16(in1, in3); 87 const __m128i c4 = _mm_sub_epi16(c1, c2); 88 const __m128i c = _mm_add_epi16(c3, c4); 89 // d = MUL(in1, K1) + MUL(in3, K2) = MUL(in1, k1) + MUL(in3, k2) + in1 + in3 90 const __m128i d1 = _mm_mulhi_epi16(in1, k1); 91 const __m128i d2 = _mm_mulhi_epi16(in3, k2); 92 const __m128i d3 = _mm_add_epi16(in1, in3); 93 const __m128i d4 = _mm_add_epi16(d1, d2); 94 const __m128i d = _mm_add_epi16(d3, d4); 95 96 // Second pass. 97 const __m128i tmp0 = _mm_add_epi16(a, d); 98 const __m128i tmp1 = _mm_add_epi16(b, c); 99 const __m128i tmp2 = _mm_sub_epi16(b, c); 100 const __m128i tmp3 = _mm_sub_epi16(a, d); 101 102 // Transpose the two 4x4. 103 // a00 a01 a02 a03 b00 b01 b02 b03 104 // a10 a11 a12 a13 b10 b11 b12 b13 105 // a20 a21 a22 a23 b20 b21 b22 b23 106 // a30 a31 a32 a33 b30 b31 b32 b33 107 const __m128i transpose0_0 = _mm_unpacklo_epi16(tmp0, tmp1); 108 const __m128i transpose0_1 = _mm_unpacklo_epi16(tmp2, tmp3); 109 const __m128i transpose0_2 = _mm_unpackhi_epi16(tmp0, tmp1); 110 const __m128i transpose0_3 = _mm_unpackhi_epi16(tmp2, tmp3); 111 // a00 a10 a01 a11 a02 a12 a03 a13 112 // a20 a30 a21 a31 a22 a32 a23 a33 113 // b00 b10 b01 b11 b02 b12 b03 b13 114 // b20 b30 b21 b31 b22 b32 b23 b33 115 const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); 116 const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3); 117 const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); 118 const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3); 119 // a00 a10 a20 a30 a01 a11 a21 a31 120 // b00 b10 b20 b30 b01 b11 b21 b31 121 // a02 a12 a22 a32 a03 a13 a23 a33 122 // b02 b12 a22 b32 b03 b13 b23 b33 123 T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); 124 T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); 125 T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); 126 T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3); 127 // a00 a10 a20 a30 b00 b10 b20 b30 128 // a01 a11 a21 a31 b01 b11 b21 b31 129 // a02 a12 a22 a32 b02 b12 b22 b32 130 // a03 a13 a23 a33 b03 b13 b23 b33 131 } 132 133 // Horizontal pass and subsequent transpose. 134 { 135 // First pass, c and d calculations are longer because of the "trick" 136 // multiplications. 137 const __m128i four = _mm_set1_epi16(4); 138 const __m128i dc = _mm_add_epi16(T0, four); 139 const __m128i a = _mm_add_epi16(dc, T2); 140 const __m128i b = _mm_sub_epi16(dc, T2); 141 // c = MUL(T1, K2) - MUL(T3, K1) = MUL(T1, k2) - MUL(T3, k1) + T1 - T3 142 const __m128i c1 = _mm_mulhi_epi16(T1, k2); 143 const __m128i c2 = _mm_mulhi_epi16(T3, k1); 144 const __m128i c3 = _mm_sub_epi16(T1, T3); 145 const __m128i c4 = _mm_sub_epi16(c1, c2); 146 const __m128i c = _mm_add_epi16(c3, c4); 147 // d = MUL(T1, K1) + MUL(T3, K2) = MUL(T1, k1) + MUL(T3, k2) + T1 + T3 148 const __m128i d1 = _mm_mulhi_epi16(T1, k1); 149 const __m128i d2 = _mm_mulhi_epi16(T3, k2); 150 const __m128i d3 = _mm_add_epi16(T1, T3); 151 const __m128i d4 = _mm_add_epi16(d1, d2); 152 const __m128i d = _mm_add_epi16(d3, d4); 153 154 // Second pass. 155 const __m128i tmp0 = _mm_add_epi16(a, d); 156 const __m128i tmp1 = _mm_add_epi16(b, c); 157 const __m128i tmp2 = _mm_sub_epi16(b, c); 158 const __m128i tmp3 = _mm_sub_epi16(a, d); 159 const __m128i shifted0 = _mm_srai_epi16(tmp0, 3); 160 const __m128i shifted1 = _mm_srai_epi16(tmp1, 3); 161 const __m128i shifted2 = _mm_srai_epi16(tmp2, 3); 162 const __m128i shifted3 = _mm_srai_epi16(tmp3, 3); 163 164 // Transpose the two 4x4. 165 // a00 a01 a02 a03 b00 b01 b02 b03 166 // a10 a11 a12 a13 b10 b11 b12 b13 167 // a20 a21 a22 a23 b20 b21 b22 b23 168 // a30 a31 a32 a33 b30 b31 b32 b33 169 const __m128i transpose0_0 = _mm_unpacklo_epi16(shifted0, shifted1); 170 const __m128i transpose0_1 = _mm_unpacklo_epi16(shifted2, shifted3); 171 const __m128i transpose0_2 = _mm_unpackhi_epi16(shifted0, shifted1); 172 const __m128i transpose0_3 = _mm_unpackhi_epi16(shifted2, shifted3); 173 // a00 a10 a01 a11 a02 a12 a03 a13 174 // a20 a30 a21 a31 a22 a32 a23 a33 175 // b00 b10 b01 b11 b02 b12 b03 b13 176 // b20 b30 b21 b31 b22 b32 b23 b33 177 const __m128i transpose1_0 = _mm_unpacklo_epi32(transpose0_0, transpose0_1); 178 const __m128i transpose1_1 = _mm_unpacklo_epi32(transpose0_2, transpose0_3); 179 const __m128i transpose1_2 = _mm_unpackhi_epi32(transpose0_0, transpose0_1); 180 const __m128i transpose1_3 = _mm_unpackhi_epi32(transpose0_2, transpose0_3); 181 // a00 a10 a20 a30 a01 a11 a21 a31 182 // b00 b10 b20 b30 b01 b11 b21 b31 183 // a02 a12 a22 a32 a03 a13 a23 a33 184 // b02 b12 a22 b32 b03 b13 b23 b33 185 T0 = _mm_unpacklo_epi64(transpose1_0, transpose1_1); 186 T1 = _mm_unpackhi_epi64(transpose1_0, transpose1_1); 187 T2 = _mm_unpacklo_epi64(transpose1_2, transpose1_3); 188 T3 = _mm_unpackhi_epi64(transpose1_2, transpose1_3); 189 // a00 a10 a20 a30 b00 b10 b20 b30 190 // a01 a11 a21 a31 b01 b11 b21 b31 191 // a02 a12 a22 a32 b02 b12 b22 b32 192 // a03 a13 a23 a33 b03 b13 b23 b33 193 } 194 195 // Add inverse transform to 'dst' and store. 196 { 197 const __m128i zero = _mm_setzero_si128(); 198 // Load the reference(s). 199 __m128i dst0, dst1, dst2, dst3; 200 if (do_two) { 201 // Load eight bytes/pixels per line. 202 dst0 = _mm_loadl_epi64((__m128i*)&dst[0 * BPS]); 203 dst1 = _mm_loadl_epi64((__m128i*)&dst[1 * BPS]); 204 dst2 = _mm_loadl_epi64((__m128i*)&dst[2 * BPS]); 205 dst3 = _mm_loadl_epi64((__m128i*)&dst[3 * BPS]); 206 } else { 207 // Load four bytes/pixels per line. 208 dst0 = _mm_cvtsi32_si128(*(int*)&dst[0 * BPS]); 209 dst1 = _mm_cvtsi32_si128(*(int*)&dst[1 * BPS]); 210 dst2 = _mm_cvtsi32_si128(*(int*)&dst[2 * BPS]); 211 dst3 = _mm_cvtsi32_si128(*(int*)&dst[3 * BPS]); 212 } 213 // Convert to 16b. 214 dst0 = _mm_unpacklo_epi8(dst0, zero); 215 dst1 = _mm_unpacklo_epi8(dst1, zero); 216 dst2 = _mm_unpacklo_epi8(dst2, zero); 217 dst3 = _mm_unpacklo_epi8(dst3, zero); 218 // Add the inverse transform(s). 219 dst0 = _mm_add_epi16(dst0, T0); 220 dst1 = _mm_add_epi16(dst1, T1); 221 dst2 = _mm_add_epi16(dst2, T2); 222 dst3 = _mm_add_epi16(dst3, T3); 223 // Unsigned saturate to 8b. 224 dst0 = _mm_packus_epi16(dst0, dst0); 225 dst1 = _mm_packus_epi16(dst1, dst1); 226 dst2 = _mm_packus_epi16(dst2, dst2); 227 dst3 = _mm_packus_epi16(dst3, dst3); 228 // Store the results. 229 if (do_two) { 230 // Store eight bytes/pixels per line. 231 _mm_storel_epi64((__m128i*)&dst[0 * BPS], dst0); 232 _mm_storel_epi64((__m128i*)&dst[1 * BPS], dst1); 233 _mm_storel_epi64((__m128i*)&dst[2 * BPS], dst2); 234 _mm_storel_epi64((__m128i*)&dst[3 * BPS], dst3); 235 } else { 236 // Store four bytes/pixels per line. 237 *((int32_t *)&dst[0 * BPS]) = _mm_cvtsi128_si32(dst0); 238 *((int32_t *)&dst[1 * BPS]) = _mm_cvtsi128_si32(dst1); 239 *((int32_t *)&dst[2 * BPS]) = _mm_cvtsi128_si32(dst2); 240 *((int32_t *)&dst[3 * BPS]) = _mm_cvtsi128_si32(dst3); 241 } 242 } 243} 244 245//------------------------------------------------------------------------------ 246// Loop Filter (Paragraph 15) 247 248// Compute abs(p - q) = subs(p - q) OR subs(q - p) 249#define MM_ABS(p, q) _mm_or_si128( \ 250 _mm_subs_epu8((q), (p)), \ 251 _mm_subs_epu8((p), (q))) 252 253// Shift each byte of "a" by N bits while preserving by the sign bit. 254// 255// It first shifts the lower bytes of the words and then the upper bytes and 256// then merges the results together. 257#define SIGNED_SHIFT_N(a, N) { \ 258 __m128i t = a; \ 259 t = _mm_slli_epi16(t, 8); \ 260 t = _mm_srai_epi16(t, N); \ 261 t = _mm_srli_epi16(t, 8); \ 262 \ 263 a = _mm_srai_epi16(a, N + 8); \ 264 a = _mm_slli_epi16(a, 8); \ 265 \ 266 a = _mm_or_si128(t, a); \ 267} 268 269#define FLIP_SIGN_BIT2(a, b) { \ 270 a = _mm_xor_si128(a, sign_bit); \ 271 b = _mm_xor_si128(b, sign_bit); \ 272} 273 274#define FLIP_SIGN_BIT4(a, b, c, d) { \ 275 FLIP_SIGN_BIT2(a, b); \ 276 FLIP_SIGN_BIT2(c, d); \ 277} 278 279#define GET_NOTHEV(p1, p0, q0, q1, hev_thresh, not_hev) { \ 280 const __m128i zero = _mm_setzero_si128(); \ 281 const __m128i t_1 = MM_ABS(p1, p0); \ 282 const __m128i t_2 = MM_ABS(q1, q0); \ 283 \ 284 const __m128i h = _mm_set1_epi8(hev_thresh); \ 285 const __m128i t_3 = _mm_subs_epu8(t_1, h); /* abs(p1 - p0) - hev_tresh */ \ 286 const __m128i t_4 = _mm_subs_epu8(t_2, h); /* abs(q1 - q0) - hev_tresh */ \ 287 \ 288 not_hev = _mm_or_si128(t_3, t_4); \ 289 not_hev = _mm_cmpeq_epi8(not_hev, zero); /* not_hev <= t1 && not_hev <= t2 */\ 290} 291 292#define GET_BASE_DELTA(p1, p0, q0, q1, o) { \ 293 const __m128i qp0 = _mm_subs_epi8(q0, p0); /* q0 - p0 */ \ 294 o = _mm_subs_epi8(p1, q1); /* p1 - q1 */ \ 295 o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 1 * (q0 - p0) */ \ 296 o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 2 * (q0 - p0) */ \ 297 o = _mm_adds_epi8(o, qp0); /* p1 - q1 + 3 * (q0 - p0) */ \ 298} 299 300#define DO_SIMPLE_FILTER(p0, q0, fl) { \ 301 const __m128i three = _mm_set1_epi8(3); \ 302 const __m128i four = _mm_set1_epi8(4); \ 303 __m128i v3 = _mm_adds_epi8(fl, three); \ 304 __m128i v4 = _mm_adds_epi8(fl, four); \ 305 \ 306 /* Do +4 side */ \ 307 SIGNED_SHIFT_N(v4, 3); /* v4 >> 3 */ \ 308 q0 = _mm_subs_epi8(q0, v4); /* q0 -= v4 */ \ 309 \ 310 /* Now do +3 side */ \ 311 SIGNED_SHIFT_N(v3, 3); /* v3 >> 3 */ \ 312 p0 = _mm_adds_epi8(p0, v3); /* p0 += v3 */ \ 313} 314 315// Updates values of 2 pixels at MB edge during complex filtering. 316// Update operations: 317// q = q - delta and p = p + delta; where delta = [(a_hi >> 7), (a_lo >> 7)] 318#define UPDATE_2PIXELS(pi, qi, a_lo, a_hi) { \ 319 const __m128i a_lo7 = _mm_srai_epi16(a_lo, 7); \ 320 const __m128i a_hi7 = _mm_srai_epi16(a_hi, 7); \ 321 const __m128i delta = _mm_packs_epi16(a_lo7, a_hi7); \ 322 pi = _mm_adds_epi8(pi, delta); \ 323 qi = _mm_subs_epi8(qi, delta); \ 324} 325 326static void NeedsFilter(const __m128i* p1, const __m128i* p0, const __m128i* q0, 327 const __m128i* q1, int thresh, __m128i *mask) { 328 __m128i t1 = MM_ABS(*p1, *q1); // abs(p1 - q1) 329 *mask = _mm_set1_epi8(0xFE); 330 t1 = _mm_and_si128(t1, *mask); // set lsb of each byte to zero 331 t1 = _mm_srli_epi16(t1, 1); // abs(p1 - q1) / 2 332 333 *mask = MM_ABS(*p0, *q0); // abs(p0 - q0) 334 *mask = _mm_adds_epu8(*mask, *mask); // abs(p0 - q0) * 2 335 *mask = _mm_adds_epu8(*mask, t1); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2 336 337 t1 = _mm_set1_epi8(thresh); 338 *mask = _mm_subs_epu8(*mask, t1); // mask <= thresh 339 *mask = _mm_cmpeq_epi8(*mask, _mm_setzero_si128()); 340} 341 342//------------------------------------------------------------------------------ 343// Edge filtering functions 344 345// Applies filter on 2 pixels (p0 and q0) 346static WEBP_INLINE void DoFilter2(const __m128i* p1, __m128i* p0, __m128i* q0, 347 const __m128i* q1, int thresh) { 348 __m128i a, mask; 349 const __m128i sign_bit = _mm_set1_epi8(0x80); 350 const __m128i p1s = _mm_xor_si128(*p1, sign_bit); 351 const __m128i q1s = _mm_xor_si128(*q1, sign_bit); 352 353 NeedsFilter(p1, p0, q0, q1, thresh, &mask); 354 355 // convert to signed values 356 FLIP_SIGN_BIT2(*p0, *q0); 357 358 GET_BASE_DELTA(p1s, *p0, *q0, q1s, a); 359 a = _mm_and_si128(a, mask); // mask filter values we don't care about 360 DO_SIMPLE_FILTER(*p0, *q0, a); 361 362 // unoffset 363 FLIP_SIGN_BIT2(*p0, *q0); 364} 365 366// Applies filter on 4 pixels (p1, p0, q0 and q1) 367static WEBP_INLINE void DoFilter4(__m128i* p1, __m128i *p0, 368 __m128i* q0, __m128i* q1, 369 const __m128i* mask, int hev_thresh) { 370 __m128i not_hev; 371 __m128i t1, t2, t3; 372 const __m128i sign_bit = _mm_set1_epi8(0x80); 373 374 // compute hev mask 375 GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev); 376 377 // convert to signed values 378 FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); 379 380 t1 = _mm_subs_epi8(*p1, *q1); // p1 - q1 381 t1 = _mm_andnot_si128(not_hev, t1); // hev(p1 - q1) 382 t2 = _mm_subs_epi8(*q0, *p0); // q0 - p0 383 t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 1 * (q0 - p0) 384 t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 2 * (q0 - p0) 385 t1 = _mm_adds_epi8(t1, t2); // hev(p1 - q1) + 3 * (q0 - p0) 386 t1 = _mm_and_si128(t1, *mask); // mask filter values we don't care about 387 388 // Do +4 side 389 t2 = _mm_set1_epi8(4); 390 t2 = _mm_adds_epi8(t1, t2); // 3 * (q0 - p0) + (p1 - q1) + 4 391 SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 3 392 t3 = t2; // save t2 393 *q0 = _mm_subs_epi8(*q0, t2); // q0 -= t2 394 395 // Now do +3 side 396 t2 = _mm_set1_epi8(3); 397 t2 = _mm_adds_epi8(t1, t2); // +3 instead of +4 398 SIGNED_SHIFT_N(t2, 3); // (3 * (q0 - p0) + hev(p1 - q1) + 3) >> 3 399 *p0 = _mm_adds_epi8(*p0, t2); // p0 += t2 400 401 t2 = _mm_set1_epi8(1); 402 t3 = _mm_adds_epi8(t3, t2); 403 SIGNED_SHIFT_N(t3, 1); // (3 * (q0 - p0) + hev(p1 - q1) + 4) >> 4 404 405 t3 = _mm_and_si128(not_hev, t3); // if !hev 406 *q1 = _mm_subs_epi8(*q1, t3); // q1 -= t3 407 *p1 = _mm_adds_epi8(*p1, t3); // p1 += t3 408 409 // unoffset 410 FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); 411} 412 413// Applies filter on 6 pixels (p2, p1, p0, q0, q1 and q2) 414static WEBP_INLINE void DoFilter6(__m128i *p2, __m128i* p1, __m128i *p0, 415 __m128i* q0, __m128i* q1, __m128i *q2, 416 const __m128i* mask, int hev_thresh) { 417 __m128i a, not_hev; 418 const __m128i sign_bit = _mm_set1_epi8(0x80); 419 420 // compute hev mask 421 GET_NOTHEV(*p1, *p0, *q0, *q1, hev_thresh, not_hev); 422 423 // convert to signed values 424 FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); 425 FLIP_SIGN_BIT2(*p2, *q2); 426 427 GET_BASE_DELTA(*p1, *p0, *q0, *q1, a); 428 429 { // do simple filter on pixels with hev 430 const __m128i m = _mm_andnot_si128(not_hev, *mask); 431 const __m128i f = _mm_and_si128(a, m); 432 DO_SIMPLE_FILTER(*p0, *q0, f); 433 } 434 { // do strong filter on pixels with not hev 435 const __m128i zero = _mm_setzero_si128(); 436 const __m128i nine = _mm_set1_epi16(0x0900); 437 const __m128i sixty_three = _mm_set1_epi16(63); 438 439 const __m128i m = _mm_and_si128(not_hev, *mask); 440 const __m128i f = _mm_and_si128(a, m); 441 const __m128i f_lo = _mm_unpacklo_epi8(zero, f); 442 const __m128i f_hi = _mm_unpackhi_epi8(zero, f); 443 444 const __m128i f9_lo = _mm_mulhi_epi16(f_lo, nine); // Filter (lo) * 9 445 const __m128i f9_hi = _mm_mulhi_epi16(f_hi, nine); // Filter (hi) * 9 446 const __m128i f18_lo = _mm_add_epi16(f9_lo, f9_lo); // Filter (lo) * 18 447 const __m128i f18_hi = _mm_add_epi16(f9_hi, f9_hi); // Filter (hi) * 18 448 449 const __m128i a2_lo = _mm_add_epi16(f9_lo, sixty_three); // Filter * 9 + 63 450 const __m128i a2_hi = _mm_add_epi16(f9_hi, sixty_three); // Filter * 9 + 63 451 452 const __m128i a1_lo = _mm_add_epi16(f18_lo, sixty_three); // F... * 18 + 63 453 const __m128i a1_hi = _mm_add_epi16(f18_hi, sixty_three); // F... * 18 + 63 454 455 const __m128i a0_lo = _mm_add_epi16(f18_lo, a2_lo); // Filter * 27 + 63 456 const __m128i a0_hi = _mm_add_epi16(f18_hi, a2_hi); // Filter * 27 + 63 457 458 UPDATE_2PIXELS(*p2, *q2, a2_lo, a2_hi); 459 UPDATE_2PIXELS(*p1, *q1, a1_lo, a1_hi); 460 UPDATE_2PIXELS(*p0, *q0, a0_lo, a0_hi); 461 } 462 463 // unoffset 464 FLIP_SIGN_BIT4(*p1, *p0, *q0, *q1); 465 FLIP_SIGN_BIT2(*p2, *q2); 466} 467 468// reads 8 rows across a vertical edge. 469// 470// TODO(somnath): Investigate _mm_shuffle* also see if it can be broken into 471// two Load4x4() to avoid code duplication. 472static WEBP_INLINE void Load8x4(const uint8_t* b, int stride, 473 __m128i* p, __m128i* q) { 474 __m128i t1, t2; 475 476 // Load 0th, 1st, 4th and 5th rows 477 __m128i r0 = _mm_cvtsi32_si128(*((int*)&b[0 * stride])); // 03 02 01 00 478 __m128i r1 = _mm_cvtsi32_si128(*((int*)&b[1 * stride])); // 13 12 11 10 479 __m128i r4 = _mm_cvtsi32_si128(*((int*)&b[4 * stride])); // 43 42 41 40 480 __m128i r5 = _mm_cvtsi32_si128(*((int*)&b[5 * stride])); // 53 52 51 50 481 482 r0 = _mm_unpacklo_epi32(r0, r4); // 43 42 41 40 03 02 01 00 483 r1 = _mm_unpacklo_epi32(r1, r5); // 53 52 51 50 13 12 11 10 484 485 // t1 = 53 43 52 42 51 41 50 40 13 03 12 02 11 01 10 00 486 t1 = _mm_unpacklo_epi8(r0, r1); 487 488 // Load 2nd, 3rd, 6th and 7th rows 489 r0 = _mm_cvtsi32_si128(*((int*)&b[2 * stride])); // 23 22 21 22 490 r1 = _mm_cvtsi32_si128(*((int*)&b[3 * stride])); // 33 32 31 30 491 r4 = _mm_cvtsi32_si128(*((int*)&b[6 * stride])); // 63 62 61 60 492 r5 = _mm_cvtsi32_si128(*((int*)&b[7 * stride])); // 73 72 71 70 493 494 r0 = _mm_unpacklo_epi32(r0, r4); // 63 62 61 60 23 22 21 20 495 r1 = _mm_unpacklo_epi32(r1, r5); // 73 72 71 70 33 32 31 30 496 497 // t2 = 73 63 72 62 71 61 70 60 33 23 32 22 31 21 30 20 498 t2 = _mm_unpacklo_epi8(r0, r1); 499 500 // t1 = 33 23 13 03 32 22 12 02 31 21 11 01 30 20 10 00 501 // t2 = 73 63 53 43 72 62 52 42 71 61 51 41 70 60 50 40 502 r0 = t1; 503 t1 = _mm_unpacklo_epi16(t1, t2); 504 t2 = _mm_unpackhi_epi16(r0, t2); 505 506 // *p = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00 507 // *q = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02 508 *p = _mm_unpacklo_epi32(t1, t2); 509 *q = _mm_unpackhi_epi32(t1, t2); 510} 511 512static WEBP_INLINE void Load16x4(const uint8_t* r0, const uint8_t* r8, 513 int stride, 514 __m128i* p1, __m128i* p0, 515 __m128i* q0, __m128i* q1) { 516 __m128i t1, t2; 517 // Assume the pixels around the edge (|) are numbered as follows 518 // 00 01 | 02 03 519 // 10 11 | 12 13 520 // ... | ... 521 // e0 e1 | e2 e3 522 // f0 f1 | f2 f3 523 // 524 // r0 is pointing to the 0th row (00) 525 // r8 is pointing to the 8th row (80) 526 527 // Load 528 // p1 = 71 61 51 41 31 21 11 01 70 60 50 40 30 20 10 00 529 // q0 = 73 63 53 43 33 23 13 03 72 62 52 42 32 22 12 02 530 // p0 = f1 e1 d1 c1 b1 a1 91 81 f0 e0 d0 c0 b0 a0 90 80 531 // q1 = f3 e3 d3 c3 b3 a3 93 83 f2 e2 d2 c2 b2 a2 92 82 532 Load8x4(r0, stride, p1, q0); 533 Load8x4(r8, stride, p0, q1); 534 535 t1 = *p1; 536 t2 = *q0; 537 // p1 = f0 e0 d0 c0 b0 a0 90 80 70 60 50 40 30 20 10 00 538 // p0 = f1 e1 d1 c1 b1 a1 91 81 71 61 51 41 31 21 11 01 539 // q0 = f2 e2 d2 c2 b2 a2 92 82 72 62 52 42 32 22 12 02 540 // q1 = f3 e3 d3 c3 b3 a3 93 83 73 63 53 43 33 23 13 03 541 *p1 = _mm_unpacklo_epi64(t1, *p0); 542 *p0 = _mm_unpackhi_epi64(t1, *p0); 543 *q0 = _mm_unpacklo_epi64(t2, *q1); 544 *q1 = _mm_unpackhi_epi64(t2, *q1); 545} 546 547static WEBP_INLINE void Store4x4(__m128i* x, uint8_t* dst, int stride) { 548 int i; 549 for (i = 0; i < 4; ++i, dst += stride) { 550 *((int32_t*)dst) = _mm_cvtsi128_si32(*x); 551 *x = _mm_srli_si128(*x, 4); 552 } 553} 554 555// Transpose back and store 556static WEBP_INLINE void Store16x4(uint8_t* r0, uint8_t* r8, int stride, 557 __m128i* p1, __m128i* p0, 558 __m128i* q0, __m128i* q1) { 559 __m128i t1; 560 561 // p0 = 71 70 61 60 51 50 41 40 31 30 21 20 11 10 01 00 562 // p1 = f1 f0 e1 e0 d1 d0 c1 c0 b1 b0 a1 a0 91 90 81 80 563 t1 = *p0; 564 *p0 = _mm_unpacklo_epi8(*p1, t1); 565 *p1 = _mm_unpackhi_epi8(*p1, t1); 566 567 // q0 = 73 72 63 62 53 52 43 42 33 32 23 22 13 12 03 02 568 // q1 = f3 f2 e3 e2 d3 d2 c3 c2 b3 b2 a3 a2 93 92 83 82 569 t1 = *q0; 570 *q0 = _mm_unpacklo_epi8(t1, *q1); 571 *q1 = _mm_unpackhi_epi8(t1, *q1); 572 573 // p0 = 33 32 31 30 23 22 21 20 13 12 11 10 03 02 01 00 574 // q0 = 73 72 71 70 63 62 61 60 53 52 51 50 43 42 41 40 575 t1 = *p0; 576 *p0 = _mm_unpacklo_epi16(t1, *q0); 577 *q0 = _mm_unpackhi_epi16(t1, *q0); 578 579 // p1 = b3 b2 b1 b0 a3 a2 a1 a0 93 92 91 90 83 82 81 80 580 // q1 = f3 f2 f1 f0 e3 e2 e1 e0 d3 d2 d1 d0 c3 c2 c1 c0 581 t1 = *p1; 582 *p1 = _mm_unpacklo_epi16(t1, *q1); 583 *q1 = _mm_unpackhi_epi16(t1, *q1); 584 585 Store4x4(p0, r0, stride); 586 r0 += 4 * stride; 587 Store4x4(q0, r0, stride); 588 589 Store4x4(p1, r8, stride); 590 r8 += 4 * stride; 591 Store4x4(q1, r8, stride); 592} 593 594//------------------------------------------------------------------------------ 595// Simple In-loop filtering (Paragraph 15.2) 596 597static void SimpleVFilter16SSE2(uint8_t* p, int stride, int thresh) { 598 // Load 599 __m128i p1 = _mm_loadu_si128((__m128i*)&p[-2 * stride]); 600 __m128i p0 = _mm_loadu_si128((__m128i*)&p[-stride]); 601 __m128i q0 = _mm_loadu_si128((__m128i*)&p[0]); 602 __m128i q1 = _mm_loadu_si128((__m128i*)&p[stride]); 603 604 DoFilter2(&p1, &p0, &q0, &q1, thresh); 605 606 // Store 607 _mm_storeu_si128((__m128i*)&p[-stride], p0); 608 _mm_storeu_si128((__m128i*)p, q0); 609} 610 611static void SimpleHFilter16SSE2(uint8_t* p, int stride, int thresh) { 612 __m128i p1, p0, q0, q1; 613 614 p -= 2; // beginning of p1 615 616 Load16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1); 617 DoFilter2(&p1, &p0, &q0, &q1, thresh); 618 Store16x4(p, p + 8 * stride, stride, &p1, &p0, &q0, &q1); 619} 620 621static void SimpleVFilter16iSSE2(uint8_t* p, int stride, int thresh) { 622 int k; 623 for (k = 3; k > 0; --k) { 624 p += 4 * stride; 625 SimpleVFilter16SSE2(p, stride, thresh); 626 } 627} 628 629static void SimpleHFilter16iSSE2(uint8_t* p, int stride, int thresh) { 630 int k; 631 for (k = 3; k > 0; --k) { 632 p += 4; 633 SimpleHFilter16SSE2(p, stride, thresh); 634 } 635} 636 637//------------------------------------------------------------------------------ 638// Complex In-loop filtering (Paragraph 15.3) 639 640#define MAX_DIFF1(p3, p2, p1, p0, m) { \ 641 m = MM_ABS(p3, p2); \ 642 m = _mm_max_epu8(m, MM_ABS(p2, p1)); \ 643 m = _mm_max_epu8(m, MM_ABS(p1, p0)); \ 644} 645 646#define MAX_DIFF2(p3, p2, p1, p0, m) { \ 647 m = _mm_max_epu8(m, MM_ABS(p3, p2)); \ 648 m = _mm_max_epu8(m, MM_ABS(p2, p1)); \ 649 m = _mm_max_epu8(m, MM_ABS(p1, p0)); \ 650} 651 652#define LOAD_H_EDGES4(p, stride, e1, e2, e3, e4) { \ 653 e1 = _mm_loadu_si128((__m128i*)&(p)[0 * stride]); \ 654 e2 = _mm_loadu_si128((__m128i*)&(p)[1 * stride]); \ 655 e3 = _mm_loadu_si128((__m128i*)&(p)[2 * stride]); \ 656 e4 = _mm_loadu_si128((__m128i*)&(p)[3 * stride]); \ 657} 658 659#define LOADUV_H_EDGE(p, u, v, stride) { \ 660 p = _mm_loadl_epi64((__m128i*)&(u)[(stride)]); \ 661 p = _mm_unpacklo_epi64(p, _mm_loadl_epi64((__m128i*)&(v)[(stride)])); \ 662} 663 664#define LOADUV_H_EDGES4(u, v, stride, e1, e2, e3, e4) { \ 665 LOADUV_H_EDGE(e1, u, v, 0 * stride); \ 666 LOADUV_H_EDGE(e2, u, v, 1 * stride); \ 667 LOADUV_H_EDGE(e3, u, v, 2 * stride); \ 668 LOADUV_H_EDGE(e4, u, v, 3 * stride); \ 669} 670 671#define STOREUV(p, u, v, stride) { \ 672 _mm_storel_epi64((__m128i*)&u[(stride)], p); \ 673 p = _mm_srli_si128(p, 8); \ 674 _mm_storel_epi64((__m128i*)&v[(stride)], p); \ 675} 676 677#define COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask) { \ 678 __m128i fl_yes; \ 679 const __m128i it = _mm_set1_epi8(ithresh); \ 680 mask = _mm_subs_epu8(mask, it); \ 681 mask = _mm_cmpeq_epi8(mask, _mm_setzero_si128()); \ 682 NeedsFilter(&p1, &p0, &q0, &q1, thresh, &fl_yes); \ 683 mask = _mm_and_si128(mask, fl_yes); \ 684} 685 686// on macroblock edges 687static void VFilter16SSE2(uint8_t* p, int stride, 688 int thresh, int ithresh, int hev_thresh) { 689 __m128i t1; 690 __m128i mask; 691 __m128i p2, p1, p0, q0, q1, q2; 692 693 // Load p3, p2, p1, p0 694 LOAD_H_EDGES4(p - 4 * stride, stride, t1, p2, p1, p0); 695 MAX_DIFF1(t1, p2, p1, p0, mask); 696 697 // Load q0, q1, q2, q3 698 LOAD_H_EDGES4(p, stride, q0, q1, q2, t1); 699 MAX_DIFF2(t1, q2, q1, q0, mask); 700 701 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 702 DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); 703 704 // Store 705 _mm_storeu_si128((__m128i*)&p[-3 * stride], p2); 706 _mm_storeu_si128((__m128i*)&p[-2 * stride], p1); 707 _mm_storeu_si128((__m128i*)&p[-1 * stride], p0); 708 _mm_storeu_si128((__m128i*)&p[0 * stride], q0); 709 _mm_storeu_si128((__m128i*)&p[1 * stride], q1); 710 _mm_storeu_si128((__m128i*)&p[2 * stride], q2); 711} 712 713static void HFilter16SSE2(uint8_t* p, int stride, 714 int thresh, int ithresh, int hev_thresh) { 715 __m128i mask; 716 __m128i p3, p2, p1, p0, q0, q1, q2, q3; 717 718 uint8_t* const b = p - 4; 719 Load16x4(b, b + 8 * stride, stride, &p3, &p2, &p1, &p0); // p3, p2, p1, p0 720 MAX_DIFF1(p3, p2, p1, p0, mask); 721 722 Load16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3 723 MAX_DIFF2(q3, q2, q1, q0, mask); 724 725 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 726 DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); 727 728 Store16x4(b, b + 8 * stride, stride, &p3, &p2, &p1, &p0); 729 Store16x4(p, p + 8 * stride, stride, &q0, &q1, &q2, &q3); 730} 731 732// on three inner edges 733static void VFilter16iSSE2(uint8_t* p, int stride, 734 int thresh, int ithresh, int hev_thresh) { 735 int k; 736 __m128i mask; 737 __m128i t1, t2, p1, p0, q0, q1; 738 739 for (k = 3; k > 0; --k) { 740 // Load p3, p2, p1, p0 741 LOAD_H_EDGES4(p, stride, t2, t1, p1, p0); 742 MAX_DIFF1(t2, t1, p1, p0, mask); 743 744 p += 4 * stride; 745 746 // Load q0, q1, q2, q3 747 LOAD_H_EDGES4(p, stride, q0, q1, t1, t2); 748 MAX_DIFF2(t2, t1, q1, q0, mask); 749 750 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 751 DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); 752 753 // Store 754 _mm_storeu_si128((__m128i*)&p[-2 * stride], p1); 755 _mm_storeu_si128((__m128i*)&p[-1 * stride], p0); 756 _mm_storeu_si128((__m128i*)&p[0 * stride], q0); 757 _mm_storeu_si128((__m128i*)&p[1 * stride], q1); 758 } 759} 760 761static void HFilter16iSSE2(uint8_t* p, int stride, 762 int thresh, int ithresh, int hev_thresh) { 763 int k; 764 uint8_t* b; 765 __m128i mask; 766 __m128i t1, t2, p1, p0, q0, q1; 767 768 for (k = 3; k > 0; --k) { 769 b = p; 770 Load16x4(b, b + 8 * stride, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0 771 MAX_DIFF1(t2, t1, p1, p0, mask); 772 773 b += 4; // beginning of q0 774 Load16x4(b, b + 8 * stride, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3 775 MAX_DIFF2(t2, t1, q1, q0, mask); 776 777 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 778 DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); 779 780 b -= 2; // beginning of p1 781 Store16x4(b, b + 8 * stride, stride, &p1, &p0, &q0, &q1); 782 783 p += 4; 784 } 785} 786 787// 8-pixels wide variant, for chroma filtering 788static void VFilter8SSE2(uint8_t* u, uint8_t* v, int stride, 789 int thresh, int ithresh, int hev_thresh) { 790 __m128i mask; 791 __m128i t1, p2, p1, p0, q0, q1, q2; 792 793 // Load p3, p2, p1, p0 794 LOADUV_H_EDGES4(u - 4 * stride, v - 4 * stride, stride, t1, p2, p1, p0); 795 MAX_DIFF1(t1, p2, p1, p0, mask); 796 797 // Load q0, q1, q2, q3 798 LOADUV_H_EDGES4(u, v, stride, q0, q1, q2, t1); 799 MAX_DIFF2(t1, q2, q1, q0, mask); 800 801 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 802 DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); 803 804 // Store 805 STOREUV(p2, u, v, -3 * stride); 806 STOREUV(p1, u, v, -2 * stride); 807 STOREUV(p0, u, v, -1 * stride); 808 STOREUV(q0, u, v, 0 * stride); 809 STOREUV(q1, u, v, 1 * stride); 810 STOREUV(q2, u, v, 2 * stride); 811} 812 813static void HFilter8SSE2(uint8_t* u, uint8_t* v, int stride, 814 int thresh, int ithresh, int hev_thresh) { 815 __m128i mask; 816 __m128i p3, p2, p1, p0, q0, q1, q2, q3; 817 818 uint8_t* const tu = u - 4; 819 uint8_t* const tv = v - 4; 820 Load16x4(tu, tv, stride, &p3, &p2, &p1, &p0); // p3, p2, p1, p0 821 MAX_DIFF1(p3, p2, p1, p0, mask); 822 823 Load16x4(u, v, stride, &q0, &q1, &q2, &q3); // q0, q1, q2, q3 824 MAX_DIFF2(q3, q2, q1, q0, mask); 825 826 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 827 DoFilter6(&p2, &p1, &p0, &q0, &q1, &q2, &mask, hev_thresh); 828 829 Store16x4(tu, tv, stride, &p3, &p2, &p1, &p0); 830 Store16x4(u, v, stride, &q0, &q1, &q2, &q3); 831} 832 833static void VFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, 834 int thresh, int ithresh, int hev_thresh) { 835 __m128i mask; 836 __m128i t1, t2, p1, p0, q0, q1; 837 838 // Load p3, p2, p1, p0 839 LOADUV_H_EDGES4(u, v, stride, t2, t1, p1, p0); 840 MAX_DIFF1(t2, t1, p1, p0, mask); 841 842 u += 4 * stride; 843 v += 4 * stride; 844 845 // Load q0, q1, q2, q3 846 LOADUV_H_EDGES4(u, v, stride, q0, q1, t1, t2); 847 MAX_DIFF2(t2, t1, q1, q0, mask); 848 849 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 850 DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); 851 852 // Store 853 STOREUV(p1, u, v, -2 * stride); 854 STOREUV(p0, u, v, -1 * stride); 855 STOREUV(q0, u, v, 0 * stride); 856 STOREUV(q1, u, v, 1 * stride); 857} 858 859static void HFilter8iSSE2(uint8_t* u, uint8_t* v, int stride, 860 int thresh, int ithresh, int hev_thresh) { 861 __m128i mask; 862 __m128i t1, t2, p1, p0, q0, q1; 863 Load16x4(u, v, stride, &t2, &t1, &p1, &p0); // p3, p2, p1, p0 864 MAX_DIFF1(t2, t1, p1, p0, mask); 865 866 u += 4; // beginning of q0 867 v += 4; 868 Load16x4(u, v, stride, &q0, &q1, &t1, &t2); // q0, q1, q2, q3 869 MAX_DIFF2(t2, t1, q1, q0, mask); 870 871 COMPLEX_FL_MASK(p1, p0, q0, q1, thresh, ithresh, mask); 872 DoFilter4(&p1, &p0, &q0, &q1, &mask, hev_thresh); 873 874 u -= 2; // beginning of p1 875 v -= 2; 876 Store16x4(u, v, stride, &p1, &p0, &q0, &q1); 877} 878 879#endif // WEBP_USE_SSE2 880 881//------------------------------------------------------------------------------ 882// Entry point 883 884extern void VP8DspInitSSE2(void); 885 886void VP8DspInitSSE2(void) { 887#if defined(WEBP_USE_SSE2) 888 VP8Transform = TransformSSE2; 889 890 VP8VFilter16 = VFilter16SSE2; 891 VP8HFilter16 = HFilter16SSE2; 892 VP8VFilter8 = VFilter8SSE2; 893 VP8HFilter8 = HFilter8SSE2; 894 VP8VFilter16i = VFilter16iSSE2; 895 VP8HFilter16i = HFilter16iSSE2; 896 VP8VFilter8i = VFilter8iSSE2; 897 VP8HFilter8i = HFilter8iSSE2; 898 899 VP8SimpleVFilter16 = SimpleVFilter16SSE2; 900 VP8SimpleHFilter16 = SimpleHFilter16SSE2; 901 VP8SimpleVFilter16i = SimpleVFilter16iSSE2; 902 VP8SimpleHFilter16i = SimpleHFilter16iSSE2; 903#endif // WEBP_USE_SSE2 904} 905 906#if defined(__cplusplus) || defined(c_plusplus) 907} // extern "C" 908#endif 909