diff options
Diffstat (limited to 'media/libvpx/libvpx/vpx_dsp/x86/inv_txfm_avx2.c')
| -rw-r--r-- | media/libvpx/libvpx/vpx_dsp/x86/inv_txfm_avx2.c | 626 |
1 files changed, 626 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/x86/inv_txfm_avx2.c b/media/libvpx/libvpx/vpx_dsp/x86/inv_txfm_avx2.c new file mode 100644 index 0000000000..752435d240 --- /dev/null +++ b/media/libvpx/libvpx/vpx_dsp/x86/inv_txfm_avx2.c @@ -0,0 +1,626 @@ +/* + * Copyright (c) 2023 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include <immintrin.h> // AVX2 + +#include "./vpx_dsp_rtcd.h" +#include "vpx_dsp/txfm_common.h" + +#define PAIR256_SET_EPI16(a, b) \ + _mm256_set_epi16((int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a), \ + (int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a), \ + (int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a), \ + (int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a)) + +static INLINE void idct_load16x16(const tran_low_t *input, __m256i *in, + int stride) { + int i; + // Load 16x16 values + for (i = 0; i < 16; i++) { +#if CONFIG_VP9_HIGHBITDEPTH + const __m128i in0 = _mm_loadu_si128((const __m128i *)(input + i * stride)); + const __m128i in1 = + _mm_loadu_si128((const __m128i *)((input + i * stride) + 4)); + const __m128i in2 = + _mm_loadu_si128((const __m128i *)((input + i * stride) + 8)); + const __m128i in3 = + _mm_loadu_si128((const __m128i *)((input + i * stride) + 12)); + const __m128i ls = _mm_packs_epi32(in0, in1); + const __m128i rs = _mm_packs_epi32(in2, in3); + in[i] = _mm256_inserti128_si256(_mm256_castsi128_si256(ls), rs, 1); +#else + in[i] = _mm256_load_si256((const __m256i *)(input + i * stride)); +#endif + } +} + +static INLINE __m256i dct_round_shift_avx2(__m256i in) { + const __m256i t = _mm256_add_epi32(in, _mm256_set1_epi32(DCT_CONST_ROUNDING)); + return _mm256_srai_epi32(t, DCT_CONST_BITS); +} + +static INLINE __m256i idct_madd_round_shift_avx2(__m256i *in, __m256i *cospi) { + const __m256i t = _mm256_madd_epi16(*in, *cospi); + return dct_round_shift_avx2(t); +} + +// Calculate the dot product between in0/1 and x and wrap to short. +static INLINE __m256i idct_calc_wraplow_avx2(__m256i *in0, __m256i *in1, + __m256i *x) { + const __m256i t0 = idct_madd_round_shift_avx2(in0, x); + const __m256i t1 = idct_madd_round_shift_avx2(in1, x); + return _mm256_packs_epi32(t0, t1); +} + +// Multiply elements by constants and add them together. +static INLINE void butterfly16(__m256i in0, __m256i in1, int c0, int c1, + __m256i *out0, __m256i *out1) { + __m256i cst0 = PAIR256_SET_EPI16(c0, -c1); + __m256i cst1 = PAIR256_SET_EPI16(c1, c0); + __m256i lo = _mm256_unpacklo_epi16(in0, in1); + __m256i hi = _mm256_unpackhi_epi16(in0, in1); + *out0 = idct_calc_wraplow_avx2(&lo, &hi, &cst0); + *out1 = idct_calc_wraplow_avx2(&lo, &hi, &cst1); +} + +static INLINE void idct16_16col(__m256i *in, __m256i *out) { + __m256i step1[16], step2[16]; + + // stage 2 + butterfly16(in[1], in[15], cospi_30_64, cospi_2_64, &step2[8], &step2[15]); + butterfly16(in[9], in[7], cospi_14_64, cospi_18_64, &step2[9], &step2[14]); + butterfly16(in[5], in[11], cospi_22_64, cospi_10_64, &step2[10], &step2[13]); + butterfly16(in[13], in[3], cospi_6_64, cospi_26_64, &step2[11], &step2[12]); + + // stage 3 + butterfly16(in[2], in[14], cospi_28_64, cospi_4_64, &step1[4], &step1[7]); + butterfly16(in[10], in[6], cospi_12_64, cospi_20_64, &step1[5], &step1[6]); + step1[8] = _mm256_add_epi16(step2[8], step2[9]); + step1[9] = _mm256_sub_epi16(step2[8], step2[9]); + step1[10] = _mm256_sub_epi16(step2[11], step2[10]); + step1[11] = _mm256_add_epi16(step2[10], step2[11]); + step1[12] = _mm256_add_epi16(step2[12], step2[13]); + step1[13] = _mm256_sub_epi16(step2[12], step2[13]); + step1[14] = _mm256_sub_epi16(step2[15], step2[14]); + step1[15] = _mm256_add_epi16(step2[14], step2[15]); + + // stage 4 + butterfly16(in[0], in[8], cospi_16_64, cospi_16_64, &step2[1], &step2[0]); + butterfly16(in[4], in[12], cospi_24_64, cospi_8_64, &step2[2], &step2[3]); + butterfly16(step1[14], step1[9], cospi_24_64, cospi_8_64, &step2[9], + &step2[14]); + butterfly16(step1[10], step1[13], -cospi_8_64, -cospi_24_64, &step2[13], + &step2[10]); + step2[5] = _mm256_sub_epi16(step1[4], step1[5]); + step1[4] = _mm256_add_epi16(step1[4], step1[5]); + step2[6] = _mm256_sub_epi16(step1[7], step1[6]); + step1[7] = _mm256_add_epi16(step1[6], step1[7]); + step2[8] = step1[8]; + step2[11] = step1[11]; + step2[12] = step1[12]; + step2[15] = step1[15]; + + // stage 5 + step1[0] = _mm256_add_epi16(step2[0], step2[3]); + step1[1] = _mm256_add_epi16(step2[1], step2[2]); + step1[2] = _mm256_sub_epi16(step2[1], step2[2]); + step1[3] = _mm256_sub_epi16(step2[0], step2[3]); + butterfly16(step2[6], step2[5], cospi_16_64, cospi_16_64, &step1[5], + &step1[6]); + step1[8] = _mm256_add_epi16(step2[8], step2[11]); + step1[9] = _mm256_add_epi16(step2[9], step2[10]); + step1[10] = _mm256_sub_epi16(step2[9], step2[10]); + step1[11] = _mm256_sub_epi16(step2[8], step2[11]); + step1[12] = _mm256_sub_epi16(step2[15], step2[12]); + step1[13] = _mm256_sub_epi16(step2[14], step2[13]); + step1[14] = _mm256_add_epi16(step2[14], step2[13]); + step1[15] = _mm256_add_epi16(step2[15], step2[12]); + + // stage 6 + step2[0] = _mm256_add_epi16(step1[0], step1[7]); + step2[1] = _mm256_add_epi16(step1[1], step1[6]); + step2[2] = _mm256_add_epi16(step1[2], step1[5]); + step2[3] = _mm256_add_epi16(step1[3], step1[4]); + step2[4] = _mm256_sub_epi16(step1[3], step1[4]); + step2[5] = _mm256_sub_epi16(step1[2], step1[5]); + step2[6] = _mm256_sub_epi16(step1[1], step1[6]); + step2[7] = _mm256_sub_epi16(step1[0], step1[7]); + butterfly16(step1[13], step1[10], cospi_16_64, cospi_16_64, &step2[10], + &step2[13]); + butterfly16(step1[12], step1[11], cospi_16_64, cospi_16_64, &step2[11], + &step2[12]); + + // stage 7 + out[0] = _mm256_add_epi16(step2[0], step1[15]); + out[1] = _mm256_add_epi16(step2[1], step1[14]); + out[2] = _mm256_add_epi16(step2[2], step2[13]); + out[3] = _mm256_add_epi16(step2[3], step2[12]); + out[4] = _mm256_add_epi16(step2[4], step2[11]); + out[5] = _mm256_add_epi16(step2[5], step2[10]); + out[6] = _mm256_add_epi16(step2[6], step1[9]); + out[7] = _mm256_add_epi16(step2[7], step1[8]); + out[8] = _mm256_sub_epi16(step2[7], step1[8]); + out[9] = _mm256_sub_epi16(step2[6], step1[9]); + out[10] = _mm256_sub_epi16(step2[5], step2[10]); + out[11] = _mm256_sub_epi16(step2[4], step2[11]); + out[12] = _mm256_sub_epi16(step2[3], step2[12]); + out[13] = _mm256_sub_epi16(step2[2], step2[13]); + out[14] = _mm256_sub_epi16(step2[1], step1[14]); + out[15] = _mm256_sub_epi16(step2[0], step1[15]); +} + +static INLINE void recon_and_store16(uint8_t *dest, __m256i in_x) { + const __m256i zero = _mm256_setzero_si256(); + __m256i d0 = _mm256_castsi128_si256(_mm_loadu_si128((__m128i *)(dest))); + d0 = _mm256_permute4x64_epi64(d0, 0xd8); + d0 = _mm256_unpacklo_epi8(d0, zero); + d0 = _mm256_add_epi16(in_x, d0); + d0 = _mm256_packus_epi16( + d0, _mm256_castsi128_si256(_mm256_extractf128_si256(d0, 1))); + + _mm_storeu_si128((__m128i *)dest, _mm256_castsi256_si128(d0)); +} + +static INLINE void write_buffer_16x1(uint8_t *dest, __m256i in) { + const __m256i final_rounding = _mm256_set1_epi16(1 << 5); + __m256i out; + out = _mm256_adds_epi16(in, final_rounding); + out = _mm256_srai_epi16(out, 6); + recon_and_store16(dest, out); +} + +static INLINE void store_buffer_16x32(__m256i *in, uint8_t *dst, int stride) { + const __m256i final_rounding = _mm256_set1_epi16(1 << 5); + int j = 0; + while (j < 32) { + in[j] = _mm256_adds_epi16(in[j], final_rounding); + in[j + 1] = _mm256_adds_epi16(in[j + 1], final_rounding); + + in[j] = _mm256_srai_epi16(in[j], 6); + in[j + 1] = _mm256_srai_epi16(in[j + 1], 6); + + recon_and_store16(dst, in[j]); + dst += stride; + recon_and_store16(dst, in[j + 1]); + dst += stride; + j += 2; + } +} + +static INLINE void transpose2_8x8_avx2(__m256i *in, __m256i *out) { + int i; + __m256i t[16], u[16]; + // (1st, 2nd) ==> (lo, hi) + // (0, 1) ==> (0, 1) + // (2, 3) ==> (2, 3) + // (4, 5) ==> (4, 5) + // (6, 7) ==> (6, 7) + for (i = 0; i < 4; i++) { + t[2 * i] = _mm256_unpacklo_epi16(in[2 * i], in[2 * i + 1]); + t[2 * i + 1] = _mm256_unpackhi_epi16(in[2 * i], in[2 * i + 1]); + } + + // (1st, 2nd) ==> (lo, hi) + // (0, 2) ==> (0, 2) + // (1, 3) ==> (1, 3) + // (4, 6) ==> (4, 6) + // (5, 7) ==> (5, 7) + for (i = 0; i < 2; i++) { + u[i] = _mm256_unpacklo_epi32(t[i], t[i + 2]); + u[i + 2] = _mm256_unpackhi_epi32(t[i], t[i + 2]); + + u[i + 4] = _mm256_unpacklo_epi32(t[i + 4], t[i + 6]); + u[i + 6] = _mm256_unpackhi_epi32(t[i + 4], t[i + 6]); + } + + // (1st, 2nd) ==> (lo, hi) + // (0, 4) ==> (0, 1) + // (1, 5) ==> (4, 5) + // (2, 6) ==> (2, 3) + // (3, 7) ==> (6, 7) + for (i = 0; i < 2; i++) { + out[2 * i] = _mm256_unpacklo_epi64(u[2 * i], u[2 * i + 4]); + out[2 * i + 1] = _mm256_unpackhi_epi64(u[2 * i], u[2 * i + 4]); + + out[2 * i + 4] = _mm256_unpacklo_epi64(u[2 * i + 1], u[2 * i + 5]); + out[2 * i + 5] = _mm256_unpackhi_epi64(u[2 * i + 1], u[2 * i + 5]); + } +} + +static INLINE void transpose_16bit_16x16_avx2(__m256i *in, __m256i *out) { + __m256i t[16]; + +#define LOADL(idx) \ + t[idx] = _mm256_castsi128_si256(_mm_load_si128((__m128i const *)&in[idx])); \ + t[idx] = _mm256_inserti128_si256( \ + t[idx], _mm_load_si128((__m128i const *)&in[(idx) + 8]), 1); + +#define LOADR(idx) \ + t[8 + (idx)] = \ + _mm256_castsi128_si256(_mm_load_si128((__m128i const *)&in[idx] + 1)); \ + t[8 + (idx)] = _mm256_inserti128_si256( \ + t[8 + (idx)], _mm_load_si128((__m128i const *)&in[(idx) + 8] + 1), 1); + + // load left 8x16 + LOADL(0) + LOADL(1) + LOADL(2) + LOADL(3) + LOADL(4) + LOADL(5) + LOADL(6) + LOADL(7) + + // load right 8x16 + LOADR(0) + LOADR(1) + LOADR(2) + LOADR(3) + LOADR(4) + LOADR(5) + LOADR(6) + LOADR(7) + + // get the top 16x8 result + transpose2_8x8_avx2(t, out); + // get the bottom 16x8 result + transpose2_8x8_avx2(&t[8], &out[8]); +} + +void vpx_idct16x16_256_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + int i; + __m256i in[16]; + + // Load 16x16 values + idct_load16x16(input, in, 16); + + transpose_16bit_16x16_avx2(in, in); + idct16_16col(in, in); + + transpose_16bit_16x16_avx2(in, in); + idct16_16col(in, in); + + for (i = 0; i < 16; ++i) { + write_buffer_16x1(dest + i * stride, in[i]); + } +} + +// Only do addition and subtraction butterfly, size = 16, 32 +static INLINE void add_sub_butterfly_avx2(__m256i *in, __m256i *out, int size) { + int i = 0; + const int num = size >> 1; + const int bound = size - 1; + while (i < num) { + out[i] = _mm256_add_epi16(in[i], in[bound - i]); + out[bound - i] = _mm256_sub_epi16(in[i], in[bound - i]); + i++; + } +} + +// For each 16x32 block __m256i in[32], +// Input with index, 0, 4, 8, 12, 16, 20, 24, 28 +// output pixels: 0-7 in __m256i out[32] +static INLINE void idct32_1024_16x32_quarter_1(__m256i *in, __m256i *out) { + __m256i step1[8], step2[8]; + + // stage 3 + butterfly16(in[4], in[28], cospi_28_64, cospi_4_64, &step1[4], &step1[7]); + butterfly16(in[20], in[12], cospi_12_64, cospi_20_64, &step1[5], &step1[6]); + + // stage 4 + butterfly16(in[0], in[16], cospi_16_64, cospi_16_64, &step2[1], &step2[0]); + butterfly16(in[8], in[24], cospi_24_64, cospi_8_64, &step2[2], &step2[3]); + step2[4] = _mm256_add_epi16(step1[4], step1[5]); + step2[5] = _mm256_sub_epi16(step1[4], step1[5]); + step2[6] = _mm256_sub_epi16(step1[7], step1[6]); + step2[7] = _mm256_add_epi16(step1[7], step1[6]); + + // stage 5 + step1[0] = _mm256_add_epi16(step2[0], step2[3]); + step1[1] = _mm256_add_epi16(step2[1], step2[2]); + step1[2] = _mm256_sub_epi16(step2[1], step2[2]); + step1[3] = _mm256_sub_epi16(step2[0], step2[3]); + step1[4] = step2[4]; + butterfly16(step2[6], step2[5], cospi_16_64, cospi_16_64, &step1[5], + &step1[6]); + step1[7] = step2[7]; + + // stage 6 + out[0] = _mm256_add_epi16(step1[0], step1[7]); + out[1] = _mm256_add_epi16(step1[1], step1[6]); + out[2] = _mm256_add_epi16(step1[2], step1[5]); + out[3] = _mm256_add_epi16(step1[3], step1[4]); + out[4] = _mm256_sub_epi16(step1[3], step1[4]); + out[5] = _mm256_sub_epi16(step1[2], step1[5]); + out[6] = _mm256_sub_epi16(step1[1], step1[6]); + out[7] = _mm256_sub_epi16(step1[0], step1[7]); +} + +static INLINE void idct32_16x32_quarter_2_stage_4_to_6(__m256i *step1, + __m256i *out) { + __m256i step2[32]; + + // stage 4 + step2[8] = step1[8]; + step2[15] = step1[15]; + butterfly16(step1[14], step1[9], cospi_24_64, cospi_8_64, &step2[9], + &step2[14]); + butterfly16(step1[13], step1[10], -cospi_8_64, cospi_24_64, &step2[10], + &step2[13]); + step2[11] = step1[11]; + step2[12] = step1[12]; + + // stage 5 + step1[8] = _mm256_add_epi16(step2[8], step2[11]); + step1[9] = _mm256_add_epi16(step2[9], step2[10]); + step1[10] = _mm256_sub_epi16(step2[9], step2[10]); + step1[11] = _mm256_sub_epi16(step2[8], step2[11]); + step1[12] = _mm256_sub_epi16(step2[15], step2[12]); + step1[13] = _mm256_sub_epi16(step2[14], step2[13]); + step1[14] = _mm256_add_epi16(step2[14], step2[13]); + step1[15] = _mm256_add_epi16(step2[15], step2[12]); + + // stage 6 + out[8] = step1[8]; + out[9] = step1[9]; + butterfly16(step1[13], step1[10], cospi_16_64, cospi_16_64, &out[10], + &out[13]); + butterfly16(step1[12], step1[11], cospi_16_64, cospi_16_64, &out[11], + &out[12]); + out[14] = step1[14]; + out[15] = step1[15]; +} + +// For each 16x32 block __m256i in[32], +// Input with index, 2, 6, 10, 14, 18, 22, 26, 30 +// output pixels: 8-15 in __m256i out[32] +static INLINE void idct32_1024_16x32_quarter_2(__m256i *in, __m256i *out) { + __m256i step1[16], step2[16]; + + // stage 2 + butterfly16(in[2], in[30], cospi_30_64, cospi_2_64, &step2[8], &step2[15]); + butterfly16(in[18], in[14], cospi_14_64, cospi_18_64, &step2[9], &step2[14]); + butterfly16(in[10], in[22], cospi_22_64, cospi_10_64, &step2[10], &step2[13]); + butterfly16(in[26], in[6], cospi_6_64, cospi_26_64, &step2[11], &step2[12]); + + // stage 3 + step1[8] = _mm256_add_epi16(step2[8], step2[9]); + step1[9] = _mm256_sub_epi16(step2[8], step2[9]); + step1[10] = _mm256_sub_epi16(step2[11], step2[10]); + step1[11] = _mm256_add_epi16(step2[11], step2[10]); + step1[12] = _mm256_add_epi16(step2[12], step2[13]); + step1[13] = _mm256_sub_epi16(step2[12], step2[13]); + step1[14] = _mm256_sub_epi16(step2[15], step2[14]); + step1[15] = _mm256_add_epi16(step2[15], step2[14]); + + idct32_16x32_quarter_2_stage_4_to_6(step1, out); +} + +static INLINE void idct32_16x32_quarter_3_4_stage_4_to_7(__m256i *step1, + __m256i *out) { + __m256i step2[32]; + + // stage 4 + step2[16] = _mm256_add_epi16(step1[16], step1[19]); + step2[17] = _mm256_add_epi16(step1[17], step1[18]); + step2[18] = _mm256_sub_epi16(step1[17], step1[18]); + step2[19] = _mm256_sub_epi16(step1[16], step1[19]); + step2[20] = _mm256_sub_epi16(step1[23], step1[20]); + step2[21] = _mm256_sub_epi16(step1[22], step1[21]); + step2[22] = _mm256_add_epi16(step1[22], step1[21]); + step2[23] = _mm256_add_epi16(step1[23], step1[20]); + + step2[24] = _mm256_add_epi16(step1[24], step1[27]); + step2[25] = _mm256_add_epi16(step1[25], step1[26]); + step2[26] = _mm256_sub_epi16(step1[25], step1[26]); + step2[27] = _mm256_sub_epi16(step1[24], step1[27]); + step2[28] = _mm256_sub_epi16(step1[31], step1[28]); + step2[29] = _mm256_sub_epi16(step1[30], step1[29]); + step2[30] = _mm256_add_epi16(step1[29], step1[30]); + step2[31] = _mm256_add_epi16(step1[28], step1[31]); + + // stage 5 + step1[16] = step2[16]; + step1[17] = step2[17]; + butterfly16(step2[29], step2[18], cospi_24_64, cospi_8_64, &step1[18], + &step1[29]); + butterfly16(step2[28], step2[19], cospi_24_64, cospi_8_64, &step1[19], + &step1[28]); + butterfly16(step2[27], step2[20], -cospi_8_64, cospi_24_64, &step1[20], + &step1[27]); + butterfly16(step2[26], step2[21], -cospi_8_64, cospi_24_64, &step1[21], + &step1[26]); + step1[22] = step2[22]; + step1[23] = step2[23]; + step1[24] = step2[24]; + step1[25] = step2[25]; + step1[30] = step2[30]; + step1[31] = step2[31]; + + // stage 6 + out[16] = _mm256_add_epi16(step1[16], step1[23]); + out[17] = _mm256_add_epi16(step1[17], step1[22]); + out[18] = _mm256_add_epi16(step1[18], step1[21]); + out[19] = _mm256_add_epi16(step1[19], step1[20]); + step2[20] = _mm256_sub_epi16(step1[19], step1[20]); + step2[21] = _mm256_sub_epi16(step1[18], step1[21]); + step2[22] = _mm256_sub_epi16(step1[17], step1[22]); + step2[23] = _mm256_sub_epi16(step1[16], step1[23]); + + step2[24] = _mm256_sub_epi16(step1[31], step1[24]); + step2[25] = _mm256_sub_epi16(step1[30], step1[25]); + step2[26] = _mm256_sub_epi16(step1[29], step1[26]); + step2[27] = _mm256_sub_epi16(step1[28], step1[27]); + out[28] = _mm256_add_epi16(step1[27], step1[28]); + out[29] = _mm256_add_epi16(step1[26], step1[29]); + out[30] = _mm256_add_epi16(step1[25], step1[30]); + out[31] = _mm256_add_epi16(step1[24], step1[31]); + + // stage 7 + butterfly16(step2[27], step2[20], cospi_16_64, cospi_16_64, &out[20], + &out[27]); + butterfly16(step2[26], step2[21], cospi_16_64, cospi_16_64, &out[21], + &out[26]); + butterfly16(step2[25], step2[22], cospi_16_64, cospi_16_64, &out[22], + &out[25]); + butterfly16(step2[24], step2[23], cospi_16_64, cospi_16_64, &out[23], + &out[24]); +} + +static INLINE void idct32_1024_16x32_quarter_1_2(__m256i *in, __m256i *out) { + __m256i temp[16]; + + // For each 16x32 block __m256i in[32], + // Input with index, 0, 4, 8, 12, 16, 20, 24, 28 + // output pixels: 0-7 in __m256i out[32] + idct32_1024_16x32_quarter_1(in, temp); + + // Input with index, 2, 6, 10, 14, 18, 22, 26, 30 + // output pixels: 8-15 in __m256i out[32] + idct32_1024_16x32_quarter_2(in, temp); + + // stage 7 + add_sub_butterfly_avx2(temp, out, 16); +} + +// For each 16x32 block __m256i in[32], +// Input with odd index, +// 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31 +// output pixels: 16-23, 24-31 in __m256i out[32] +static INLINE void idct32_1024_16x32_quarter_3_4(__m256i *in, __m256i *out) { + __m256i step1[32], step2[32]; + + // stage 1 + butterfly16(in[1], in[31], cospi_31_64, cospi_1_64, &step1[16], &step1[31]); + butterfly16(in[17], in[15], cospi_15_64, cospi_17_64, &step1[17], &step1[30]); + butterfly16(in[9], in[23], cospi_23_64, cospi_9_64, &step1[18], &step1[29]); + butterfly16(in[25], in[7], cospi_7_64, cospi_25_64, &step1[19], &step1[28]); + + butterfly16(in[5], in[27], cospi_27_64, cospi_5_64, &step1[20], &step1[27]); + butterfly16(in[21], in[11], cospi_11_64, cospi_21_64, &step1[21], &step1[26]); + + butterfly16(in[13], in[19], cospi_19_64, cospi_13_64, &step1[22], &step1[25]); + butterfly16(in[29], in[3], cospi_3_64, cospi_29_64, &step1[23], &step1[24]); + + // stage 2 + step2[16] = _mm256_add_epi16(step1[16], step1[17]); + step2[17] = _mm256_sub_epi16(step1[16], step1[17]); + step2[18] = _mm256_sub_epi16(step1[19], step1[18]); + step2[19] = _mm256_add_epi16(step1[19], step1[18]); + step2[20] = _mm256_add_epi16(step1[20], step1[21]); + step2[21] = _mm256_sub_epi16(step1[20], step1[21]); + step2[22] = _mm256_sub_epi16(step1[23], step1[22]); + step2[23] = _mm256_add_epi16(step1[23], step1[22]); + + step2[24] = _mm256_add_epi16(step1[24], step1[25]); + step2[25] = _mm256_sub_epi16(step1[24], step1[25]); + step2[26] = _mm256_sub_epi16(step1[27], step1[26]); + step2[27] = _mm256_add_epi16(step1[27], step1[26]); + step2[28] = _mm256_add_epi16(step1[28], step1[29]); + step2[29] = _mm256_sub_epi16(step1[28], step1[29]); + step2[30] = _mm256_sub_epi16(step1[31], step1[30]); + step2[31] = _mm256_add_epi16(step1[31], step1[30]); + + // stage 3 + step1[16] = step2[16]; + step1[31] = step2[31]; + butterfly16(step2[30], step2[17], cospi_28_64, cospi_4_64, &step1[17], + &step1[30]); + butterfly16(step2[29], step2[18], -cospi_4_64, cospi_28_64, &step1[18], + &step1[29]); + step1[19] = step2[19]; + step1[20] = step2[20]; + butterfly16(step2[26], step2[21], cospi_12_64, cospi_20_64, &step1[21], + &step1[26]); + butterfly16(step2[25], step2[22], -cospi_20_64, cospi_12_64, &step1[22], + &step1[25]); + step1[23] = step2[23]; + step1[24] = step2[24]; + step1[27] = step2[27]; + step1[28] = step2[28]; + + idct32_16x32_quarter_3_4_stage_4_to_7(step1, out); +} + +static INLINE void idct32_1024_16x32(__m256i *in, __m256i *out) { + __m256i temp[32]; + + // For each 16x32 block __m256i in[32], + // Input with index, 0, 4, 8, 12, 16, 20, 24, 28 + // output pixels: 0-7 in __m256i out[32] + // AND + // Input with index, 2, 6, 10, 14, 18, 22, 26, 30 + // output pixels: 8-15 in __m256i out[32] + idct32_1024_16x32_quarter_1_2(in, temp); + + // For each 16x32 block __m256i in[32], + // Input with odd index, + // 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31 + // output pixels: 16-23, 24-31 in __m256i out[32] + idct32_1024_16x32_quarter_3_4(in, temp); + + // final stage + add_sub_butterfly_avx2(temp, out, 32); +} + +void vpx_idct32x32_1024_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i l[32], r[32], out[32], *in; + int i; + + in = l; + + for (i = 0; i < 2; i++) { + idct_load16x16(input, in, 32); + transpose_16bit_16x16_avx2(in, in); + + idct_load16x16(input + 16, in + 16, 32); + transpose_16bit_16x16_avx2(in + 16, in + 16); + idct32_1024_16x32(in, in); + + in = r; + input += 32 << 4; + } + + for (i = 0; i < 32; i += 16) { + transpose_16bit_16x16_avx2(l + i, out); + transpose_16bit_16x16_avx2(r + i, out + 16); + idct32_1024_16x32(out, out); + + store_buffer_16x32(out, dest, stride); + dest += 16; + } +} + +// Case when only upper-left 16x16 has non-zero coeff +void vpx_idct32x32_135_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i in[32], io[32], out[32]; + int i; + + for (i = 16; i < 32; i++) { + in[i] = _mm256_setzero_si256(); + } + + // rows + idct_load16x16(input, in, 32); + transpose_16bit_16x16_avx2(in, in); + idct32_1024_16x32(in, io); + + // columns + for (i = 0; i < 32; i += 16) { + transpose_16bit_16x16_avx2(io + i, in); + idct32_1024_16x32(in, out); + + store_buffer_16x32(out, dest, stride); + dest += 16; + } +} |