1/* 2 * Copyright (c) 2014 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#include <emmintrin.h> // SSE2 12 13#include "./vpx_dsp_rtcd.h" 14#include "vpx_dsp/txfm_common.h" 15#include "vpx_dsp/x86/fwd_txfm_sse2.h" 16#include "vpx_dsp/x86/txfm_common_sse2.h" 17#include "vpx_ports/mem.h" 18 19// TODO(jingning) The high bit-depth functions need rework for performance. 20// After we properly fix the high bit-depth function implementations, this 21// file's dependency should be substantially simplified. 22#if DCT_HIGH_BIT_DEPTH 23#define ADD_EPI16 _mm_adds_epi16 24#define SUB_EPI16 _mm_subs_epi16 25 26#else 27#define ADD_EPI16 _mm_add_epi16 28#define SUB_EPI16 _mm_sub_epi16 29#endif 30 31void FDCT4x4_2D(const int16_t *input, tran_low_t *output, int stride) { 32 // This 2D transform implements 4 vertical 1D transforms followed 33 // by 4 horizontal 1D transforms. The multiplies and adds are as given 34 // by Chen, Smith and Fralick ('77). The commands for moving the data 35 // around have been minimized by hand. 36 // For the purposes of the comments, the 16 inputs are referred to at i0 37 // through iF (in raster order), intermediate variables are a0, b0, c0 38 // through f, and correspond to the in-place computations mapped to input 39 // locations. The outputs, o0 through oF are labeled according to the 40 // output locations. 41 42 // Constants 43 // These are the coefficients used for the multiplies. 44 // In the comments, pN means cos(N pi /64) and mN is -cos(N pi /64), 45 // where cospi_N_64 = cos(N pi /64) 46 const __m128i k__cospi_A = 47 octa_set_epi16(cospi_16_64, cospi_16_64, cospi_16_64, cospi_16_64, 48 cospi_16_64, -cospi_16_64, cospi_16_64, -cospi_16_64); 49 const __m128i k__cospi_B = 50 octa_set_epi16(cospi_16_64, -cospi_16_64, cospi_16_64, -cospi_16_64, 51 cospi_16_64, cospi_16_64, cospi_16_64, cospi_16_64); 52 const __m128i k__cospi_C = 53 octa_set_epi16(cospi_8_64, cospi_24_64, cospi_8_64, cospi_24_64, 54 cospi_24_64, -cospi_8_64, cospi_24_64, -cospi_8_64); 55 const __m128i k__cospi_D = 56 octa_set_epi16(cospi_24_64, -cospi_8_64, cospi_24_64, -cospi_8_64, 57 cospi_8_64, cospi_24_64, cospi_8_64, cospi_24_64); 58 const __m128i k__cospi_E = 59 octa_set_epi16(cospi_16_64, cospi_16_64, cospi_16_64, cospi_16_64, 60 cospi_16_64, cospi_16_64, cospi_16_64, cospi_16_64); 61 const __m128i k__cospi_F = 62 octa_set_epi16(cospi_16_64, -cospi_16_64, cospi_16_64, -cospi_16_64, 63 cospi_16_64, -cospi_16_64, cospi_16_64, -cospi_16_64); 64 const __m128i k__cospi_G = 65 octa_set_epi16(cospi_8_64, cospi_24_64, cospi_8_64, cospi_24_64, 66 -cospi_8_64, -cospi_24_64, -cospi_8_64, -cospi_24_64); 67 const __m128i k__cospi_H = 68 octa_set_epi16(cospi_24_64, -cospi_8_64, cospi_24_64, -cospi_8_64, 69 -cospi_24_64, cospi_8_64, -cospi_24_64, cospi_8_64); 70 71 const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING); 72 // This second rounding constant saves doing some extra adds at the end 73 const __m128i k__DCT_CONST_ROUNDING2 = 74 _mm_set1_epi32(DCT_CONST_ROUNDING + (DCT_CONST_ROUNDING << 1)); 75 const int DCT_CONST_BITS2 = DCT_CONST_BITS + 2; 76 const __m128i k__nonzero_bias_a = _mm_setr_epi16(0, 1, 1, 1, 1, 1, 1, 1); 77 const __m128i k__nonzero_bias_b = _mm_setr_epi16(1, 0, 0, 0, 0, 0, 0, 0); 78 __m128i in0, in1; 79#if DCT_HIGH_BIT_DEPTH 80 __m128i cmp0, cmp1; 81 int test, overflow; 82#endif 83 84 // Load inputs. 85 in0 = _mm_loadl_epi64((const __m128i *)(input + 0 * stride)); 86 in1 = _mm_loadl_epi64((const __m128i *)(input + 1 * stride)); 87 in1 = _mm_unpacklo_epi64( 88 in1, _mm_loadl_epi64((const __m128i *)(input + 2 * stride))); 89 in0 = _mm_unpacklo_epi64( 90 in0, _mm_loadl_epi64((const __m128i *)(input + 3 * stride))); 91// in0 = [i0 i1 i2 i3 iC iD iE iF] 92// in1 = [i4 i5 i6 i7 i8 i9 iA iB] 93#if DCT_HIGH_BIT_DEPTH 94 // Check inputs small enough to use optimised code 95 cmp0 = _mm_xor_si128(_mm_cmpgt_epi16(in0, _mm_set1_epi16(0x3ff)), 96 _mm_cmplt_epi16(in0, _mm_set1_epi16(0xfc00))); 97 cmp1 = _mm_xor_si128(_mm_cmpgt_epi16(in1, _mm_set1_epi16(0x3ff)), 98 _mm_cmplt_epi16(in1, _mm_set1_epi16(0xfc00))); 99 test = _mm_movemask_epi8(_mm_or_si128(cmp0, cmp1)); 100 if (test) { 101 vpx_highbd_fdct4x4_c(input, output, stride); 102 return; 103 } 104#endif // DCT_HIGH_BIT_DEPTH 105 106 // multiply by 16 to give some extra precision 107 in0 = _mm_slli_epi16(in0, 4); 108 in1 = _mm_slli_epi16(in1, 4); 109 // if (i == 0 && input[0]) input[0] += 1; 110 // add 1 to the upper left pixel if it is non-zero, which helps reduce 111 // the round-trip error 112 { 113 // The mask will only contain whether the first value is zero, all 114 // other comparison will fail as something shifted by 4 (above << 4) 115 // can never be equal to one. To increment in the non-zero case, we 116 // add the mask and one for the first element: 117 // - if zero, mask = -1, v = v - 1 + 1 = v 118 // - if non-zero, mask = 0, v = v + 0 + 1 = v + 1 119 __m128i mask = _mm_cmpeq_epi16(in0, k__nonzero_bias_a); 120 in0 = _mm_add_epi16(in0, mask); 121 in0 = _mm_add_epi16(in0, k__nonzero_bias_b); 122 } 123 // There are 4 total stages, alternating between an add/subtract stage 124 // followed by an multiply-and-add stage. 125 { 126 // Stage 1: Add/subtract 127 128 // in0 = [i0 i1 i2 i3 iC iD iE iF] 129 // in1 = [i4 i5 i6 i7 i8 i9 iA iB] 130 const __m128i r0 = _mm_unpacklo_epi16(in0, in1); 131 const __m128i r1 = _mm_unpackhi_epi16(in0, in1); 132 // r0 = [i0 i4 i1 i5 i2 i6 i3 i7] 133 // r1 = [iC i8 iD i9 iE iA iF iB] 134 const __m128i r2 = _mm_shuffle_epi32(r0, 0xB4); 135 const __m128i r3 = _mm_shuffle_epi32(r1, 0xB4); 136 // r2 = [i0 i4 i1 i5 i3 i7 i2 i6] 137 // r3 = [iC i8 iD i9 iF iB iE iA] 138 139 const __m128i t0 = _mm_add_epi16(r2, r3); 140 const __m128i t1 = _mm_sub_epi16(r2, r3); 141 // t0 = [a0 a4 a1 a5 a3 a7 a2 a6] 142 // t1 = [aC a8 aD a9 aF aB aE aA] 143 144 // Stage 2: multiply by constants (which gets us into 32 bits). 145 // The constants needed here are: 146 // k__cospi_A = [p16 p16 p16 p16 p16 m16 p16 m16] 147 // k__cospi_B = [p16 m16 p16 m16 p16 p16 p16 p16] 148 // k__cospi_C = [p08 p24 p08 p24 p24 m08 p24 m08] 149 // k__cospi_D = [p24 m08 p24 m08 p08 p24 p08 p24] 150 const __m128i u0 = _mm_madd_epi16(t0, k__cospi_A); 151 const __m128i u2 = _mm_madd_epi16(t0, k__cospi_B); 152 const __m128i u1 = _mm_madd_epi16(t1, k__cospi_C); 153 const __m128i u3 = _mm_madd_epi16(t1, k__cospi_D); 154 // Then add and right-shift to get back to 16-bit range 155 const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING); 156 const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING); 157 const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING); 158 const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING); 159 const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS); 160 const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS); 161 const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS); 162 const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS); 163 // w0 = [b0 b1 b7 b6] 164 // w1 = [b8 b9 bF bE] 165 // w2 = [b4 b5 b3 b2] 166 // w3 = [bC bD bB bA] 167 const __m128i x0 = _mm_packs_epi32(w0, w1); 168 const __m128i x1 = _mm_packs_epi32(w2, w3); 169#if DCT_HIGH_BIT_DEPTH 170 overflow = check_epi16_overflow_x2(&x0, &x1); 171 if (overflow) { 172 vpx_highbd_fdct4x4_c(input, output, stride); 173 return; 174 } 175#endif // DCT_HIGH_BIT_DEPTH 176 // x0 = [b0 b1 b7 b6 b8 b9 bF bE] 177 // x1 = [b4 b5 b3 b2 bC bD bB bA] 178 in0 = _mm_shuffle_epi32(x0, 0xD8); 179 in1 = _mm_shuffle_epi32(x1, 0x8D); 180 // in0 = [b0 b1 b8 b9 b7 b6 bF bE] 181 // in1 = [b3 b2 bB bA b4 b5 bC bD] 182 } 183 { 184 // vertical DCTs finished. Now we do the horizontal DCTs. 185 // Stage 3: Add/subtract 186 187 const __m128i t0 = ADD_EPI16(in0, in1); 188 const __m128i t1 = SUB_EPI16(in0, in1); 189// t0 = [c0 c1 c8 c9 c4 c5 cC cD] 190// t1 = [c3 c2 cB cA -c7 -c6 -cF -cE] 191#if DCT_HIGH_BIT_DEPTH 192 overflow = check_epi16_overflow_x2(&t0, &t1); 193 if (overflow) { 194 vpx_highbd_fdct4x4_c(input, output, stride); 195 return; 196 } 197#endif // DCT_HIGH_BIT_DEPTH 198 199 // Stage 4: multiply by constants (which gets us into 32 bits). 200 { 201 // The constants needed here are: 202 // k__cospi_E = [p16 p16 p16 p16 p16 p16 p16 p16] 203 // k__cospi_F = [p16 m16 p16 m16 p16 m16 p16 m16] 204 // k__cospi_G = [p08 p24 p08 p24 m08 m24 m08 m24] 205 // k__cospi_H = [p24 m08 p24 m08 m24 p08 m24 p08] 206 const __m128i u0 = _mm_madd_epi16(t0, k__cospi_E); 207 const __m128i u1 = _mm_madd_epi16(t0, k__cospi_F); 208 const __m128i u2 = _mm_madd_epi16(t1, k__cospi_G); 209 const __m128i u3 = _mm_madd_epi16(t1, k__cospi_H); 210 // Then add and right-shift to get back to 16-bit range 211 // but this combines the final right-shift as well to save operations 212 // This unusual rounding operations is to maintain bit-accurate 213 // compatibility with the c version of this function which has two 214 // rounding steps in a row. 215 const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING2); 216 const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING2); 217 const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING2); 218 const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING2); 219 const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS2); 220 const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS2); 221 const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS2); 222 const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS2); 223 // w0 = [o0 o4 o8 oC] 224 // w1 = [o2 o6 oA oE] 225 // w2 = [o1 o5 o9 oD] 226 // w3 = [o3 o7 oB oF] 227 // remember the o's are numbered according to the correct output location 228 const __m128i x0 = _mm_packs_epi32(w0, w1); 229 const __m128i x1 = _mm_packs_epi32(w2, w3); 230#if DCT_HIGH_BIT_DEPTH 231 overflow = check_epi16_overflow_x2(&x0, &x1); 232 if (overflow) { 233 vpx_highbd_fdct4x4_c(input, output, stride); 234 return; 235 } 236#endif // DCT_HIGH_BIT_DEPTH 237 { 238 // x0 = [o0 o4 o8 oC o2 o6 oA oE] 239 // x1 = [o1 o5 o9 oD o3 o7 oB oF] 240 const __m128i y0 = _mm_unpacklo_epi16(x0, x1); 241 const __m128i y1 = _mm_unpackhi_epi16(x0, x1); 242 // y0 = [o0 o1 o4 o5 o8 o9 oC oD] 243 // y1 = [o2 o3 o6 o7 oA oB oE oF] 244 in0 = _mm_unpacklo_epi32(y0, y1); 245 // in0 = [o0 o1 o2 o3 o4 o5 o6 o7] 246 in1 = _mm_unpackhi_epi32(y0, y1); 247 // in1 = [o8 o9 oA oB oC oD oE oF] 248 } 249 } 250 } 251 // Post-condition (v + 1) >> 2 is now incorporated into previous 252 // add and right-shift commands. Only 2 store instructions needed 253 // because we are using the fact that 1/3 are stored just after 0/2. 254 storeu_output(&in0, output + 0 * 4); 255 storeu_output(&in1, output + 2 * 4); 256} 257 258void FDCT8x8_2D(const int16_t *input, tran_low_t *output, int stride) { 259 int pass; 260 // Constants 261 // When we use them, in one case, they are all the same. In all others 262 // it's a pair of them that we need to repeat four times. This is done 263 // by constructing the 32 bit constant corresponding to that pair. 264 const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64); 265 const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64); 266 const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64); 267 const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64); 268 const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64); 269 const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64); 270 const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64); 271 const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64); 272 const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING); 273#if DCT_HIGH_BIT_DEPTH 274 int overflow; 275#endif 276 // Load input 277 __m128i in0 = _mm_load_si128((const __m128i *)(input + 0 * stride)); 278 __m128i in1 = _mm_load_si128((const __m128i *)(input + 1 * stride)); 279 __m128i in2 = _mm_load_si128((const __m128i *)(input + 2 * stride)); 280 __m128i in3 = _mm_load_si128((const __m128i *)(input + 3 * stride)); 281 __m128i in4 = _mm_load_si128((const __m128i *)(input + 4 * stride)); 282 __m128i in5 = _mm_load_si128((const __m128i *)(input + 5 * stride)); 283 __m128i in6 = _mm_load_si128((const __m128i *)(input + 6 * stride)); 284 __m128i in7 = _mm_load_si128((const __m128i *)(input + 7 * stride)); 285 // Pre-condition input (shift by two) 286 in0 = _mm_slli_epi16(in0, 2); 287 in1 = _mm_slli_epi16(in1, 2); 288 in2 = _mm_slli_epi16(in2, 2); 289 in3 = _mm_slli_epi16(in3, 2); 290 in4 = _mm_slli_epi16(in4, 2); 291 in5 = _mm_slli_epi16(in5, 2); 292 in6 = _mm_slli_epi16(in6, 2); 293 in7 = _mm_slli_epi16(in7, 2); 294 295 // We do two passes, first the columns, then the rows. The results of the 296 // first pass are transposed so that the same column code can be reused. The 297 // results of the second pass are also transposed so that the rows (processed 298 // as columns) are put back in row positions. 299 for (pass = 0; pass < 2; pass++) { 300 // To store results of each pass before the transpose. 301 __m128i res0, res1, res2, res3, res4, res5, res6, res7; 302 // Add/subtract 303 const __m128i q0 = ADD_EPI16(in0, in7); 304 const __m128i q1 = ADD_EPI16(in1, in6); 305 const __m128i q2 = ADD_EPI16(in2, in5); 306 const __m128i q3 = ADD_EPI16(in3, in4); 307 const __m128i q4 = SUB_EPI16(in3, in4); 308 const __m128i q5 = SUB_EPI16(in2, in5); 309 const __m128i q6 = SUB_EPI16(in1, in6); 310 const __m128i q7 = SUB_EPI16(in0, in7); 311#if DCT_HIGH_BIT_DEPTH 312 if (pass == 1) { 313 overflow = 314 check_epi16_overflow_x8(&q0, &q1, &q2, &q3, &q4, &q5, &q6, &q7); 315 if (overflow) { 316 vpx_highbd_fdct8x8_c(input, output, stride); 317 return; 318 } 319 } 320#endif // DCT_HIGH_BIT_DEPTH 321 // Work on first four results 322 { 323 // Add/subtract 324 const __m128i r0 = ADD_EPI16(q0, q3); 325 const __m128i r1 = ADD_EPI16(q1, q2); 326 const __m128i r2 = SUB_EPI16(q1, q2); 327 const __m128i r3 = SUB_EPI16(q0, q3); 328#if DCT_HIGH_BIT_DEPTH 329 overflow = check_epi16_overflow_x4(&r0, &r1, &r2, &r3); 330 if (overflow) { 331 vpx_highbd_fdct8x8_c(input, output, stride); 332 return; 333 } 334#endif // DCT_HIGH_BIT_DEPTH 335 // Interleave to do the multiply by constants which gets us into 32bits 336 { 337 const __m128i t0 = _mm_unpacklo_epi16(r0, r1); 338 const __m128i t1 = _mm_unpackhi_epi16(r0, r1); 339 const __m128i t2 = _mm_unpacklo_epi16(r2, r3); 340 const __m128i t3 = _mm_unpackhi_epi16(r2, r3); 341 const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p16_p16); 342 const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p16_p16); 343 const __m128i u2 = _mm_madd_epi16(t0, k__cospi_p16_m16); 344 const __m128i u3 = _mm_madd_epi16(t1, k__cospi_p16_m16); 345 const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p24_p08); 346 const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p24_p08); 347 const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m08_p24); 348 const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m08_p24); 349 // dct_const_round_shift 350 const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING); 351 const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING); 352 const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING); 353 const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING); 354 const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING); 355 const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING); 356 const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING); 357 const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING); 358 const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS); 359 const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS); 360 const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS); 361 const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS); 362 const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS); 363 const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS); 364 const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS); 365 const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS); 366 // Combine 367 res0 = _mm_packs_epi32(w0, w1); 368 res4 = _mm_packs_epi32(w2, w3); 369 res2 = _mm_packs_epi32(w4, w5); 370 res6 = _mm_packs_epi32(w6, w7); 371#if DCT_HIGH_BIT_DEPTH 372 overflow = check_epi16_overflow_x4(&res0, &res4, &res2, &res6); 373 if (overflow) { 374 vpx_highbd_fdct8x8_c(input, output, stride); 375 return; 376 } 377#endif // DCT_HIGH_BIT_DEPTH 378 } 379 } 380 // Work on next four results 381 { 382 // Interleave to do the multiply by constants which gets us into 32bits 383 const __m128i d0 = _mm_unpacklo_epi16(q6, q5); 384 const __m128i d1 = _mm_unpackhi_epi16(q6, q5); 385 const __m128i e0 = _mm_madd_epi16(d0, k__cospi_p16_m16); 386 const __m128i e1 = _mm_madd_epi16(d1, k__cospi_p16_m16); 387 const __m128i e2 = _mm_madd_epi16(d0, k__cospi_p16_p16); 388 const __m128i e3 = _mm_madd_epi16(d1, k__cospi_p16_p16); 389 // dct_const_round_shift 390 const __m128i f0 = _mm_add_epi32(e0, k__DCT_CONST_ROUNDING); 391 const __m128i f1 = _mm_add_epi32(e1, k__DCT_CONST_ROUNDING); 392 const __m128i f2 = _mm_add_epi32(e2, k__DCT_CONST_ROUNDING); 393 const __m128i f3 = _mm_add_epi32(e3, k__DCT_CONST_ROUNDING); 394 const __m128i s0 = _mm_srai_epi32(f0, DCT_CONST_BITS); 395 const __m128i s1 = _mm_srai_epi32(f1, DCT_CONST_BITS); 396 const __m128i s2 = _mm_srai_epi32(f2, DCT_CONST_BITS); 397 const __m128i s3 = _mm_srai_epi32(f3, DCT_CONST_BITS); 398 // Combine 399 const __m128i r0 = _mm_packs_epi32(s0, s1); 400 const __m128i r1 = _mm_packs_epi32(s2, s3); 401#if DCT_HIGH_BIT_DEPTH 402 overflow = check_epi16_overflow_x2(&r0, &r1); 403 if (overflow) { 404 vpx_highbd_fdct8x8_c(input, output, stride); 405 return; 406 } 407#endif // DCT_HIGH_BIT_DEPTH 408 { 409 // Add/subtract 410 const __m128i x0 = ADD_EPI16(q4, r0); 411 const __m128i x1 = SUB_EPI16(q4, r0); 412 const __m128i x2 = SUB_EPI16(q7, r1); 413 const __m128i x3 = ADD_EPI16(q7, r1); 414#if DCT_HIGH_BIT_DEPTH 415 overflow = check_epi16_overflow_x4(&x0, &x1, &x2, &x3); 416 if (overflow) { 417 vpx_highbd_fdct8x8_c(input, output, stride); 418 return; 419 } 420#endif // DCT_HIGH_BIT_DEPTH 421 // Interleave to do the multiply by constants which gets us into 32bits 422 { 423 const __m128i t0 = _mm_unpacklo_epi16(x0, x3); 424 const __m128i t1 = _mm_unpackhi_epi16(x0, x3); 425 const __m128i t2 = _mm_unpacklo_epi16(x1, x2); 426 const __m128i t3 = _mm_unpackhi_epi16(x1, x2); 427 const __m128i u0 = _mm_madd_epi16(t0, k__cospi_p28_p04); 428 const __m128i u1 = _mm_madd_epi16(t1, k__cospi_p28_p04); 429 const __m128i u2 = _mm_madd_epi16(t0, k__cospi_m04_p28); 430 const __m128i u3 = _mm_madd_epi16(t1, k__cospi_m04_p28); 431 const __m128i u4 = _mm_madd_epi16(t2, k__cospi_p12_p20); 432 const __m128i u5 = _mm_madd_epi16(t3, k__cospi_p12_p20); 433 const __m128i u6 = _mm_madd_epi16(t2, k__cospi_m20_p12); 434 const __m128i u7 = _mm_madd_epi16(t3, k__cospi_m20_p12); 435 // dct_const_round_shift 436 const __m128i v0 = _mm_add_epi32(u0, k__DCT_CONST_ROUNDING); 437 const __m128i v1 = _mm_add_epi32(u1, k__DCT_CONST_ROUNDING); 438 const __m128i v2 = _mm_add_epi32(u2, k__DCT_CONST_ROUNDING); 439 const __m128i v3 = _mm_add_epi32(u3, k__DCT_CONST_ROUNDING); 440 const __m128i v4 = _mm_add_epi32(u4, k__DCT_CONST_ROUNDING); 441 const __m128i v5 = _mm_add_epi32(u5, k__DCT_CONST_ROUNDING); 442 const __m128i v6 = _mm_add_epi32(u6, k__DCT_CONST_ROUNDING); 443 const __m128i v7 = _mm_add_epi32(u7, k__DCT_CONST_ROUNDING); 444 const __m128i w0 = _mm_srai_epi32(v0, DCT_CONST_BITS); 445 const __m128i w1 = _mm_srai_epi32(v1, DCT_CONST_BITS); 446 const __m128i w2 = _mm_srai_epi32(v2, DCT_CONST_BITS); 447 const __m128i w3 = _mm_srai_epi32(v3, DCT_CONST_BITS); 448 const __m128i w4 = _mm_srai_epi32(v4, DCT_CONST_BITS); 449 const __m128i w5 = _mm_srai_epi32(v5, DCT_CONST_BITS); 450 const __m128i w6 = _mm_srai_epi32(v6, DCT_CONST_BITS); 451 const __m128i w7 = _mm_srai_epi32(v7, DCT_CONST_BITS); 452 // Combine 453 res1 = _mm_packs_epi32(w0, w1); 454 res7 = _mm_packs_epi32(w2, w3); 455 res5 = _mm_packs_epi32(w4, w5); 456 res3 = _mm_packs_epi32(w6, w7); 457#if DCT_HIGH_BIT_DEPTH 458 overflow = check_epi16_overflow_x4(&res1, &res7, &res5, &res3); 459 if (overflow) { 460 vpx_highbd_fdct8x8_c(input, output, stride); 461 return; 462 } 463#endif // DCT_HIGH_BIT_DEPTH 464 } 465 } 466 } 467 // Transpose the 8x8. 468 { 469 // 00 01 02 03 04 05 06 07 470 // 10 11 12 13 14 15 16 17 471 // 20 21 22 23 24 25 26 27 472 // 30 31 32 33 34 35 36 37 473 // 40 41 42 43 44 45 46 47 474 // 50 51 52 53 54 55 56 57 475 // 60 61 62 63 64 65 66 67 476 // 70 71 72 73 74 75 76 77 477 const __m128i tr0_0 = _mm_unpacklo_epi16(res0, res1); 478 const __m128i tr0_1 = _mm_unpacklo_epi16(res2, res3); 479 const __m128i tr0_2 = _mm_unpackhi_epi16(res0, res1); 480 const __m128i tr0_3 = _mm_unpackhi_epi16(res2, res3); 481 const __m128i tr0_4 = _mm_unpacklo_epi16(res4, res5); 482 const __m128i tr0_5 = _mm_unpacklo_epi16(res6, res7); 483 const __m128i tr0_6 = _mm_unpackhi_epi16(res4, res5); 484 const __m128i tr0_7 = _mm_unpackhi_epi16(res6, res7); 485 // 00 10 01 11 02 12 03 13 486 // 20 30 21 31 22 32 23 33 487 // 04 14 05 15 06 16 07 17 488 // 24 34 25 35 26 36 27 37 489 // 40 50 41 51 42 52 43 53 490 // 60 70 61 71 62 72 63 73 491 // 54 54 55 55 56 56 57 57 492 // 64 74 65 75 66 76 67 77 493 const __m128i tr1_0 = _mm_unpacklo_epi32(tr0_0, tr0_1); 494 const __m128i tr1_1 = _mm_unpacklo_epi32(tr0_2, tr0_3); 495 const __m128i tr1_2 = _mm_unpackhi_epi32(tr0_0, tr0_1); 496 const __m128i tr1_3 = _mm_unpackhi_epi32(tr0_2, tr0_3); 497 const __m128i tr1_4 = _mm_unpacklo_epi32(tr0_4, tr0_5); 498 const __m128i tr1_5 = _mm_unpacklo_epi32(tr0_6, tr0_7); 499 const __m128i tr1_6 = _mm_unpackhi_epi32(tr0_4, tr0_5); 500 const __m128i tr1_7 = _mm_unpackhi_epi32(tr0_6, tr0_7); 501 // 00 10 20 30 01 11 21 31 502 // 40 50 60 70 41 51 61 71 503 // 02 12 22 32 03 13 23 33 504 // 42 52 62 72 43 53 63 73 505 // 04 14 24 34 05 15 21 36 506 // 44 54 64 74 45 55 61 76 507 // 06 16 26 36 07 17 27 37 508 // 46 56 66 76 47 57 67 77 509 in0 = _mm_unpacklo_epi64(tr1_0, tr1_4); 510 in1 = _mm_unpackhi_epi64(tr1_0, tr1_4); 511 in2 = _mm_unpacklo_epi64(tr1_2, tr1_6); 512 in3 = _mm_unpackhi_epi64(tr1_2, tr1_6); 513 in4 = _mm_unpacklo_epi64(tr1_1, tr1_5); 514 in5 = _mm_unpackhi_epi64(tr1_1, tr1_5); 515 in6 = _mm_unpacklo_epi64(tr1_3, tr1_7); 516 in7 = _mm_unpackhi_epi64(tr1_3, tr1_7); 517 // 00 10 20 30 40 50 60 70 518 // 01 11 21 31 41 51 61 71 519 // 02 12 22 32 42 52 62 72 520 // 03 13 23 33 43 53 63 73 521 // 04 14 24 34 44 54 64 74 522 // 05 15 25 35 45 55 65 75 523 // 06 16 26 36 46 56 66 76 524 // 07 17 27 37 47 57 67 77 525 } 526 } 527 // Post-condition output and store it 528 { 529 // Post-condition (division by two) 530 // division of two 16 bits signed numbers using shifts 531 // n / 2 = (n - (n >> 15)) >> 1 532 const __m128i sign_in0 = _mm_srai_epi16(in0, 15); 533 const __m128i sign_in1 = _mm_srai_epi16(in1, 15); 534 const __m128i sign_in2 = _mm_srai_epi16(in2, 15); 535 const __m128i sign_in3 = _mm_srai_epi16(in3, 15); 536 const __m128i sign_in4 = _mm_srai_epi16(in4, 15); 537 const __m128i sign_in5 = _mm_srai_epi16(in5, 15); 538 const __m128i sign_in6 = _mm_srai_epi16(in6, 15); 539 const __m128i sign_in7 = _mm_srai_epi16(in7, 15); 540 in0 = _mm_sub_epi16(in0, sign_in0); 541 in1 = _mm_sub_epi16(in1, sign_in1); 542 in2 = _mm_sub_epi16(in2, sign_in2); 543 in3 = _mm_sub_epi16(in3, sign_in3); 544 in4 = _mm_sub_epi16(in4, sign_in4); 545 in5 = _mm_sub_epi16(in5, sign_in5); 546 in6 = _mm_sub_epi16(in6, sign_in6); 547 in7 = _mm_sub_epi16(in7, sign_in7); 548 in0 = _mm_srai_epi16(in0, 1); 549 in1 = _mm_srai_epi16(in1, 1); 550 in2 = _mm_srai_epi16(in2, 1); 551 in3 = _mm_srai_epi16(in3, 1); 552 in4 = _mm_srai_epi16(in4, 1); 553 in5 = _mm_srai_epi16(in5, 1); 554 in6 = _mm_srai_epi16(in6, 1); 555 in7 = _mm_srai_epi16(in7, 1); 556 // store results 557 store_output(&in0, (output + 0 * 8)); 558 store_output(&in1, (output + 1 * 8)); 559 store_output(&in2, (output + 2 * 8)); 560 store_output(&in3, (output + 3 * 8)); 561 store_output(&in4, (output + 4 * 8)); 562 store_output(&in5, (output + 5 * 8)); 563 store_output(&in6, (output + 6 * 8)); 564 store_output(&in7, (output + 7 * 8)); 565 } 566} 567 568void FDCT16x16_2D(const int16_t *input, tran_low_t *output, int stride) { 569 // The 2D transform is done with two passes which are actually pretty 570 // similar. In the first one, we transform the columns and transpose 571 // the results. In the second one, we transform the rows. To achieve that, 572 // as the first pass results are transposed, we transpose the columns (that 573 // is the transposed rows) and transpose the results (so that it goes back 574 // in normal/row positions). 575 int pass; 576 // We need an intermediate buffer between passes. 577 DECLARE_ALIGNED(16, int16_t, intermediate[256]); 578 const int16_t *in = input; 579 int16_t *out0 = intermediate; 580 tran_low_t *out1 = output; 581 // Constants 582 // When we use them, in one case, they are all the same. In all others 583 // it's a pair of them that we need to repeat four times. This is done 584 // by constructing the 32 bit constant corresponding to that pair. 585 const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64); 586 const __m128i k__cospi_p16_m16 = pair_set_epi16(cospi_16_64, -cospi_16_64); 587 const __m128i k__cospi_p24_p08 = pair_set_epi16(cospi_24_64, cospi_8_64); 588 const __m128i k__cospi_p08_m24 = pair_set_epi16(cospi_8_64, -cospi_24_64); 589 const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64, cospi_24_64); 590 const __m128i k__cospi_p28_p04 = pair_set_epi16(cospi_28_64, cospi_4_64); 591 const __m128i k__cospi_m04_p28 = pair_set_epi16(-cospi_4_64, cospi_28_64); 592 const __m128i k__cospi_p12_p20 = pair_set_epi16(cospi_12_64, cospi_20_64); 593 const __m128i k__cospi_m20_p12 = pair_set_epi16(-cospi_20_64, cospi_12_64); 594 const __m128i k__cospi_p30_p02 = pair_set_epi16(cospi_30_64, cospi_2_64); 595 const __m128i k__cospi_p14_p18 = pair_set_epi16(cospi_14_64, cospi_18_64); 596 const __m128i k__cospi_m02_p30 = pair_set_epi16(-cospi_2_64, cospi_30_64); 597 const __m128i k__cospi_m18_p14 = pair_set_epi16(-cospi_18_64, cospi_14_64); 598 const __m128i k__cospi_p22_p10 = pair_set_epi16(cospi_22_64, cospi_10_64); 599 const __m128i k__cospi_p06_p26 = pair_set_epi16(cospi_6_64, cospi_26_64); 600 const __m128i k__cospi_m10_p22 = pair_set_epi16(-cospi_10_64, cospi_22_64); 601 const __m128i k__cospi_m26_p06 = pair_set_epi16(-cospi_26_64, cospi_6_64); 602 const __m128i k__DCT_CONST_ROUNDING = _mm_set1_epi32(DCT_CONST_ROUNDING); 603 const __m128i kOne = _mm_set1_epi16(1); 604 // Do the two transform/transpose passes 605 for (pass = 0; pass < 2; ++pass) { 606 // We process eight columns (transposed rows in second pass) at a time. 607 int column_start; 608#if DCT_HIGH_BIT_DEPTH 609 int overflow; 610#endif 611 for (column_start = 0; column_start < 16; column_start += 8) { 612 __m128i in00, in01, in02, in03, in04, in05, in06, in07; 613 __m128i in08, in09, in10, in11, in12, in13, in14, in15; 614 __m128i input0, input1, input2, input3, input4, input5, input6, input7; 615 __m128i step1_0, step1_1, step1_2, step1_3; 616 __m128i step1_4, step1_5, step1_6, step1_7; 617 __m128i step2_1, step2_2, step2_3, step2_4, step2_5, step2_6; 618 __m128i step3_0, step3_1, step3_2, step3_3; 619 __m128i step3_4, step3_5, step3_6, step3_7; 620 __m128i res00, res01, res02, res03, res04, res05, res06, res07; 621 __m128i res08, res09, res10, res11, res12, res13, res14, res15; 622 // Load and pre-condition input. 623 if (0 == pass) { 624 in00 = _mm_load_si128((const __m128i *)(in + 0 * stride)); 625 in01 = _mm_load_si128((const __m128i *)(in + 1 * stride)); 626 in02 = _mm_load_si128((const __m128i *)(in + 2 * stride)); 627 in03 = _mm_load_si128((const __m128i *)(in + 3 * stride)); 628 in04 = _mm_load_si128((const __m128i *)(in + 4 * stride)); 629 in05 = _mm_load_si128((const __m128i *)(in + 5 * stride)); 630 in06 = _mm_load_si128((const __m128i *)(in + 6 * stride)); 631 in07 = _mm_load_si128((const __m128i *)(in + 7 * stride)); 632 in08 = _mm_load_si128((const __m128i *)(in + 8 * stride)); 633 in09 = _mm_load_si128((const __m128i *)(in + 9 * stride)); 634 in10 = _mm_load_si128((const __m128i *)(in + 10 * stride)); 635 in11 = _mm_load_si128((const __m128i *)(in + 11 * stride)); 636 in12 = _mm_load_si128((const __m128i *)(in + 12 * stride)); 637 in13 = _mm_load_si128((const __m128i *)(in + 13 * stride)); 638 in14 = _mm_load_si128((const __m128i *)(in + 14 * stride)); 639 in15 = _mm_load_si128((const __m128i *)(in + 15 * stride)); 640 // x = x << 2 641 in00 = _mm_slli_epi16(in00, 2); 642 in01 = _mm_slli_epi16(in01, 2); 643 in02 = _mm_slli_epi16(in02, 2); 644 in03 = _mm_slli_epi16(in03, 2); 645 in04 = _mm_slli_epi16(in04, 2); 646 in05 = _mm_slli_epi16(in05, 2); 647 in06 = _mm_slli_epi16(in06, 2); 648 in07 = _mm_slli_epi16(in07, 2); 649 in08 = _mm_slli_epi16(in08, 2); 650 in09 = _mm_slli_epi16(in09, 2); 651 in10 = _mm_slli_epi16(in10, 2); 652 in11 = _mm_slli_epi16(in11, 2); 653 in12 = _mm_slli_epi16(in12, 2); 654 in13 = _mm_slli_epi16(in13, 2); 655 in14 = _mm_slli_epi16(in14, 2); 656 in15 = _mm_slli_epi16(in15, 2); 657 } else { 658 in00 = _mm_load_si128((const __m128i *)(in + 0 * 16)); 659 in01 = _mm_load_si128((const __m128i *)(in + 1 * 16)); 660 in02 = _mm_load_si128((const __m128i *)(in + 2 * 16)); 661 in03 = _mm_load_si128((const __m128i *)(in + 3 * 16)); 662 in04 = _mm_load_si128((const __m128i *)(in + 4 * 16)); 663 in05 = _mm_load_si128((const __m128i *)(in + 5 * 16)); 664 in06 = _mm_load_si128((const __m128i *)(in + 6 * 16)); 665 in07 = _mm_load_si128((const __m128i *)(in + 7 * 16)); 666 in08 = _mm_load_si128((const __m128i *)(in + 8 * 16)); 667 in09 = _mm_load_si128((const __m128i *)(in + 9 * 16)); 668 in10 = _mm_load_si128((const __m128i *)(in + 10 * 16)); 669 in11 = _mm_load_si128((const __m128i *)(in + 11 * 16)); 670 in12 = _mm_load_si128((const __m128i *)(in + 12 * 16)); 671 in13 = _mm_load_si128((const __m128i *)(in + 13 * 16)); 672 in14 = _mm_load_si128((const __m128i *)(in + 14 * 16)); 673 in15 = _mm_load_si128((const __m128i *)(in + 15 * 16)); 674 // x = (x + 1) >> 2 675 in00 = _mm_add_epi16(in00, kOne); 676 in01 = _mm_add_epi16(in01, kOne); 677 in02 = _mm_add_epi16(in02, kOne); 678 in03 = _mm_add_epi16(in03, kOne); 679 in04 = _mm_add_epi16(in04, kOne); 680 in05 = _mm_add_epi16(in05, kOne); 681 in06 = _mm_add_epi16(in06, kOne); 682 in07 = _mm_add_epi16(in07, kOne); 683 in08 = _mm_add_epi16(in08, kOne); 684 in09 = _mm_add_epi16(in09, kOne); 685 in10 = _mm_add_epi16(in10, kOne); 686 in11 = _mm_add_epi16(in11, kOne); 687 in12 = _mm_add_epi16(in12, kOne); 688 in13 = _mm_add_epi16(in13, kOne); 689 in14 = _mm_add_epi16(in14, kOne); 690 in15 = _mm_add_epi16(in15, kOne); 691 in00 = _mm_srai_epi16(in00, 2); 692 in01 = _mm_srai_epi16(in01, 2); 693 in02 = _mm_srai_epi16(in02, 2); 694 in03 = _mm_srai_epi16(in03, 2); 695 in04 = _mm_srai_epi16(in04, 2); 696 in05 = _mm_srai_epi16(in05, 2); 697 in06 = _mm_srai_epi16(in06, 2); 698 in07 = _mm_srai_epi16(in07, 2); 699 in08 = _mm_srai_epi16(in08, 2); 700 in09 = _mm_srai_epi16(in09, 2); 701 in10 = _mm_srai_epi16(in10, 2); 702 in11 = _mm_srai_epi16(in11, 2); 703 in12 = _mm_srai_epi16(in12, 2); 704 in13 = _mm_srai_epi16(in13, 2); 705 in14 = _mm_srai_epi16(in14, 2); 706 in15 = _mm_srai_epi16(in15, 2); 707 } 708 in += 8; 709 // Calculate input for the first 8 results. 710 { 711 input0 = ADD_EPI16(in00, in15); 712 input1 = ADD_EPI16(in01, in14); 713 input2 = ADD_EPI16(in02, in13); 714 input3 = ADD_EPI16(in03, in12); 715 input4 = ADD_EPI16(in04, in11); 716 input5 = ADD_EPI16(in05, in10); 717 input6 = ADD_EPI16(in06, in09); 718 input7 = ADD_EPI16(in07, in08); 719#if DCT_HIGH_BIT_DEPTH 720 overflow = check_epi16_overflow_x8(&input0, &input1, &input2, &input3, 721 &input4, &input5, &input6, &input7); 722 if (overflow) { 723 vpx_highbd_fdct16x16_c(input, output, stride); 724 return; 725 } 726#endif // DCT_HIGH_BIT_DEPTH 727 } 728 // Calculate input for the next 8 results. 729 { 730 step1_0 = SUB_EPI16(in07, in08); 731 step1_1 = SUB_EPI16(in06, in09); 732 step1_2 = SUB_EPI16(in05, in10); 733 step1_3 = SUB_EPI16(in04, in11); 734 step1_4 = SUB_EPI16(in03, in12); 735 step1_5 = SUB_EPI16(in02, in13); 736 step1_6 = SUB_EPI16(in01, in14); 737 step1_7 = SUB_EPI16(in00, in15); 738#if DCT_HIGH_BIT_DEPTH 739 overflow = 740 check_epi16_overflow_x8(&step1_0, &step1_1, &step1_2, &step1_3, 741 &step1_4, &step1_5, &step1_6, &step1_7); 742 if (overflow) { 743 vpx_highbd_fdct16x16_c(input, output, stride); 744 return; 745 } 746#endif // DCT_HIGH_BIT_DEPTH 747 } 748 // Work on the first eight values; fdct8(input, even_results); 749 { 750 // Add/subtract 751 const __m128i q0 = ADD_EPI16(input0, input7); 752 const __m128i q1 = ADD_EPI16(input1, input6); 753 const __m128i q2 = ADD_EPI16(input2, input5); 754 const __m128i q3 = ADD_EPI16(input3, input4); 755 const __m128i q4 = SUB_EPI16(input3, input4); 756 const __m128i q5 = SUB_EPI16(input2, input5); 757 const __m128i q6 = SUB_EPI16(input1, input6); 758 const __m128i q7 = SUB_EPI16(input0, input7); 759#if DCT_HIGH_BIT_DEPTH 760 overflow = 761 check_epi16_overflow_x8(&q0, &q1, &q2, &q3, &q4, &q5, &q6, &q7); 762 if (overflow) { 763 vpx_highbd_fdct16x16_c(input, output, stride); 764 return; 765 } 766#endif // DCT_HIGH_BIT_DEPTH 767 // Work on first four results 768 { 769 // Add/subtract 770 const __m128i r0 = ADD_EPI16(q0, q3); 771 const __m128i r1 = ADD_EPI16(q1, q2); 772 const __m128i r2 = SUB_EPI16(q1, q2); 773 const __m128i r3 = SUB_EPI16(q0, q3); 774#if DCT_HIGH_BIT_DEPTH 775 overflow = check_epi16_overflow_x4(&r0, &r1, &r2, &r3); 776 if (overflow) { 777 vpx_highbd_fdct16x16_c(input, output, stride); 778 return; 779 } 780#endif // DCT_HIGH_BIT_DEPTH 781 // Interleave to do the multiply by constants which gets us 782 // into 32 bits. 783 { 784 const __m128i t0 = _mm_unpacklo_epi16(r0, r1); 785 const __m128i t1 = _mm_unpackhi_epi16(r0, r1); 786 const __m128i t2 = _mm_unpacklo_epi16(r2, r3); 787 const __m128i t3 = _mm_unpackhi_epi16(r2, r3); 788 res00 = mult_round_shift(&t0, &t1, &k__cospi_p16_p16, 789 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 790 res08 = mult_round_shift(&t0, &t1, &k__cospi_p16_m16, 791 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 792 res04 = mult_round_shift(&t2, &t3, &k__cospi_p24_p08, 793 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 794 res12 = mult_round_shift(&t2, &t3, &k__cospi_m08_p24, 795 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 796#if DCT_HIGH_BIT_DEPTH 797 overflow = check_epi16_overflow_x4(&res00, &res08, &res04, &res12); 798 if (overflow) { 799 vpx_highbd_fdct16x16_c(input, output, stride); 800 return; 801 } 802#endif // DCT_HIGH_BIT_DEPTH 803 } 804 } 805 // Work on next four results 806 { 807 // Interleave to do the multiply by constants which gets us 808 // into 32 bits. 809 const __m128i d0 = _mm_unpacklo_epi16(q6, q5); 810 const __m128i d1 = _mm_unpackhi_epi16(q6, q5); 811 const __m128i r0 = 812 mult_round_shift(&d0, &d1, &k__cospi_p16_m16, 813 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 814 const __m128i r1 = 815 mult_round_shift(&d0, &d1, &k__cospi_p16_p16, 816 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 817#if DCT_HIGH_BIT_DEPTH 818 overflow = check_epi16_overflow_x2(&r0, &r1); 819 if (overflow) { 820 vpx_highbd_fdct16x16_c(input, output, stride); 821 return; 822 } 823#endif // DCT_HIGH_BIT_DEPTH 824 { 825 // Add/subtract 826 const __m128i x0 = ADD_EPI16(q4, r0); 827 const __m128i x1 = SUB_EPI16(q4, r0); 828 const __m128i x2 = SUB_EPI16(q7, r1); 829 const __m128i x3 = ADD_EPI16(q7, r1); 830#if DCT_HIGH_BIT_DEPTH 831 overflow = check_epi16_overflow_x4(&x0, &x1, &x2, &x3); 832 if (overflow) { 833 vpx_highbd_fdct16x16_c(input, output, stride); 834 return; 835 } 836#endif // DCT_HIGH_BIT_DEPTH 837 // Interleave to do the multiply by constants which gets us 838 // into 32 bits. 839 { 840 const __m128i t0 = _mm_unpacklo_epi16(x0, x3); 841 const __m128i t1 = _mm_unpackhi_epi16(x0, x3); 842 const __m128i t2 = _mm_unpacklo_epi16(x1, x2); 843 const __m128i t3 = _mm_unpackhi_epi16(x1, x2); 844 res02 = mult_round_shift(&t0, &t1, &k__cospi_p28_p04, 845 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 846 res14 = mult_round_shift(&t0, &t1, &k__cospi_m04_p28, 847 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 848 res10 = mult_round_shift(&t2, &t3, &k__cospi_p12_p20, 849 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 850 res06 = mult_round_shift(&t2, &t3, &k__cospi_m20_p12, 851 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 852#if DCT_HIGH_BIT_DEPTH 853 overflow = 854 check_epi16_overflow_x4(&res02, &res14, &res10, &res06); 855 if (overflow) { 856 vpx_highbd_fdct16x16_c(input, output, stride); 857 return; 858 } 859#endif // DCT_HIGH_BIT_DEPTH 860 } 861 } 862 } 863 } 864 // Work on the next eight values; step1 -> odd_results 865 { 866 // step 2 867 { 868 const __m128i t0 = _mm_unpacklo_epi16(step1_5, step1_2); 869 const __m128i t1 = _mm_unpackhi_epi16(step1_5, step1_2); 870 const __m128i t2 = _mm_unpacklo_epi16(step1_4, step1_3); 871 const __m128i t3 = _mm_unpackhi_epi16(step1_4, step1_3); 872 step2_2 = mult_round_shift(&t0, &t1, &k__cospi_p16_m16, 873 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 874 step2_3 = mult_round_shift(&t2, &t3, &k__cospi_p16_m16, 875 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 876 step2_5 = mult_round_shift(&t0, &t1, &k__cospi_p16_p16, 877 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 878 step2_4 = mult_round_shift(&t2, &t3, &k__cospi_p16_p16, 879 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 880#if DCT_HIGH_BIT_DEPTH 881 overflow = 882 check_epi16_overflow_x4(&step2_2, &step2_3, &step2_5, &step2_4); 883 if (overflow) { 884 vpx_highbd_fdct16x16_c(input, output, stride); 885 return; 886 } 887#endif // DCT_HIGH_BIT_DEPTH 888 } 889 // step 3 890 { 891 step3_0 = ADD_EPI16(step1_0, step2_3); 892 step3_1 = ADD_EPI16(step1_1, step2_2); 893 step3_2 = SUB_EPI16(step1_1, step2_2); 894 step3_3 = SUB_EPI16(step1_0, step2_3); 895 step3_4 = SUB_EPI16(step1_7, step2_4); 896 step3_5 = SUB_EPI16(step1_6, step2_5); 897 step3_6 = ADD_EPI16(step1_6, step2_5); 898 step3_7 = ADD_EPI16(step1_7, step2_4); 899#if DCT_HIGH_BIT_DEPTH 900 overflow = 901 check_epi16_overflow_x8(&step3_0, &step3_1, &step3_2, &step3_3, 902 &step3_4, &step3_5, &step3_6, &step3_7); 903 if (overflow) { 904 vpx_highbd_fdct16x16_c(input, output, stride); 905 return; 906 } 907#endif // DCT_HIGH_BIT_DEPTH 908 } 909 // step 4 910 { 911 const __m128i t0 = _mm_unpacklo_epi16(step3_1, step3_6); 912 const __m128i t1 = _mm_unpackhi_epi16(step3_1, step3_6); 913 const __m128i t2 = _mm_unpacklo_epi16(step3_2, step3_5); 914 const __m128i t3 = _mm_unpackhi_epi16(step3_2, step3_5); 915 step2_1 = mult_round_shift(&t0, &t1, &k__cospi_m08_p24, 916 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 917 step2_2 = mult_round_shift(&t2, &t3, &k__cospi_p24_p08, 918 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 919 step2_6 = mult_round_shift(&t0, &t1, &k__cospi_p24_p08, 920 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 921 step2_5 = mult_round_shift(&t2, &t3, &k__cospi_p08_m24, 922 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 923#if DCT_HIGH_BIT_DEPTH 924 overflow = 925 check_epi16_overflow_x4(&step2_1, &step2_2, &step2_6, &step2_5); 926 if (overflow) { 927 vpx_highbd_fdct16x16_c(input, output, stride); 928 return; 929 } 930#endif // DCT_HIGH_BIT_DEPTH 931 } 932 // step 5 933 { 934 step1_0 = ADD_EPI16(step3_0, step2_1); 935 step1_1 = SUB_EPI16(step3_0, step2_1); 936 step1_2 = ADD_EPI16(step3_3, step2_2); 937 step1_3 = SUB_EPI16(step3_3, step2_2); 938 step1_4 = SUB_EPI16(step3_4, step2_5); 939 step1_5 = ADD_EPI16(step3_4, step2_5); 940 step1_6 = SUB_EPI16(step3_7, step2_6); 941 step1_7 = ADD_EPI16(step3_7, step2_6); 942#if DCT_HIGH_BIT_DEPTH 943 overflow = 944 check_epi16_overflow_x8(&step1_0, &step1_1, &step1_2, &step1_3, 945 &step1_4, &step1_5, &step1_6, &step1_7); 946 if (overflow) { 947 vpx_highbd_fdct16x16_c(input, output, stride); 948 return; 949 } 950#endif // DCT_HIGH_BIT_DEPTH 951 } 952 // step 6 953 { 954 const __m128i t0 = _mm_unpacklo_epi16(step1_0, step1_7); 955 const __m128i t1 = _mm_unpackhi_epi16(step1_0, step1_7); 956 const __m128i t2 = _mm_unpacklo_epi16(step1_1, step1_6); 957 const __m128i t3 = _mm_unpackhi_epi16(step1_1, step1_6); 958 res01 = mult_round_shift(&t0, &t1, &k__cospi_p30_p02, 959 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 960 res09 = mult_round_shift(&t2, &t3, &k__cospi_p14_p18, 961 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 962 res15 = mult_round_shift(&t0, &t1, &k__cospi_m02_p30, 963 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 964 res07 = mult_round_shift(&t2, &t3, &k__cospi_m18_p14, 965 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 966#if DCT_HIGH_BIT_DEPTH 967 overflow = check_epi16_overflow_x4(&res01, &res09, &res15, &res07); 968 if (overflow) { 969 vpx_highbd_fdct16x16_c(input, output, stride); 970 return; 971 } 972#endif // DCT_HIGH_BIT_DEPTH 973 } 974 { 975 const __m128i t0 = _mm_unpacklo_epi16(step1_2, step1_5); 976 const __m128i t1 = _mm_unpackhi_epi16(step1_2, step1_5); 977 const __m128i t2 = _mm_unpacklo_epi16(step1_3, step1_4); 978 const __m128i t3 = _mm_unpackhi_epi16(step1_3, step1_4); 979 res05 = mult_round_shift(&t0, &t1, &k__cospi_p22_p10, 980 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 981 res13 = mult_round_shift(&t2, &t3, &k__cospi_p06_p26, 982 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 983 res11 = mult_round_shift(&t0, &t1, &k__cospi_m10_p22, 984 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 985 res03 = mult_round_shift(&t2, &t3, &k__cospi_m26_p06, 986 &k__DCT_CONST_ROUNDING, DCT_CONST_BITS); 987#if DCT_HIGH_BIT_DEPTH 988 overflow = check_epi16_overflow_x4(&res05, &res13, &res11, &res03); 989 if (overflow) { 990 vpx_highbd_fdct16x16_c(input, output, stride); 991 return; 992 } 993#endif // DCT_HIGH_BIT_DEPTH 994 } 995 } 996 // Transpose the results, do it as two 8x8 transposes. 997 transpose_and_output8x8(&res00, &res01, &res02, &res03, &res04, &res05, 998 &res06, &res07, pass, out0, out1); 999 transpose_and_output8x8(&res08, &res09, &res10, &res11, &res12, &res13, 1000 &res14, &res15, pass, out0 + 8, out1 + 8); 1001 if (pass == 0) { 1002 out0 += 8 * 16; 1003 } else { 1004 out1 += 8 * 16; 1005 } 1006 } 1007 // Setup in/out for next pass. 1008 in = intermediate; 1009 } 1010} 1011 1012#undef ADD_EPI16 1013#undef SUB_EPI16 1014