diff options
Diffstat (limited to 'third_party/aom/aom_dsp/x86/inv_txfm_avx2.c')
| -rw-r--r-- | third_party/aom/aom_dsp/x86/inv_txfm_avx2.c | 1238 |
1 files changed, 1238 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/x86/inv_txfm_avx2.c b/third_party/aom/aom_dsp/x86/inv_txfm_avx2.c new file mode 100644 index 000000000..a9d6a127c --- /dev/null +++ b/third_party/aom/aom_dsp/x86/inv_txfm_avx2.c @@ -0,0 +1,1238 @@ +/* + * Copyright (c) 2017, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <immintrin.h> + +#include "./aom_dsp_rtcd.h" +#include "aom_dsp/inv_txfm.h" +#include "aom_dsp/x86/inv_txfm_common_avx2.h" +#include "aom_dsp/x86/txfm_common_avx2.h" + +void aom_idct16x16_256_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i in[16]; + load_buffer_16x16(input, in); + mm256_transpose_16x16(in, in); + av1_idct16_avx2(in); + mm256_transpose_16x16(in, in); + av1_idct16_avx2(in); + store_buffer_16xN(in, stride, dest, 16); +} + +static INLINE void transpose_col_to_row_nz4x4(__m256i *in /*in[4]*/) { + const __m256i u0 = _mm256_unpacklo_epi16(in[0], in[1]); + const __m256i u1 = _mm256_unpacklo_epi16(in[2], in[3]); + const __m256i v0 = _mm256_unpacklo_epi32(u0, u1); + const __m256i v1 = _mm256_unpackhi_epi32(u0, u1); + in[0] = _mm256_permute4x64_epi64(v0, 0xA8); + in[1] = _mm256_permute4x64_epi64(v0, 0xA9); + in[2] = _mm256_permute4x64_epi64(v1, 0xA8); + in[3] = _mm256_permute4x64_epi64(v1, 0xA9); +} + +#define MM256_SHUFFLE_EPI64(x0, x1, imm8) \ + _mm256_castpd_si256(_mm256_shuffle_pd(_mm256_castsi256_pd(x0), \ + _mm256_castsi256_pd(x1), imm8)) + +static INLINE void transpose_col_to_row_nz4x16(__m256i *in /*in[16]*/) { + int i; + for (i = 0; i < 16; i += 4) { + transpose_col_to_row_nz4x4(&in[i]); + } + + for (i = 0; i < 4; ++i) { + in[i] = MM256_SHUFFLE_EPI64(in[i], in[i + 4], 0); + in[i + 8] = MM256_SHUFFLE_EPI64(in[i + 8], in[i + 12], 0); + } + + for (i = 0; i < 4; ++i) { + in[i] = _mm256_permute2x128_si256(in[i], in[i + 8], 0x20); + } +} + +// Coefficients 0-7 before the final butterfly +static INLINE void idct16_10_first_half(const __m256i *in, __m256i *out) { + const __m256i c2p28 = pair256_set_epi16(2 * cospi_28_64, 2 * cospi_28_64); + const __m256i c2p04 = pair256_set_epi16(2 * cospi_4_64, 2 * cospi_4_64); + const __m256i v4 = _mm256_mulhrs_epi16(in[2], c2p28); + const __m256i v7 = _mm256_mulhrs_epi16(in[2], c2p04); + + const __m256i c2p16 = pair256_set_epi16(2 * cospi_16_64, 2 * cospi_16_64); + const __m256i v0 = _mm256_mulhrs_epi16(in[0], c2p16); + const __m256i v1 = v0; + + const __m256i cospi_p16_p16 = _mm256_set1_epi16((int16_t)cospi_16_64); + const __m256i cospi_p16_m16 = pair256_set_epi16(cospi_16_64, -cospi_16_64); + __m256i v5, v6; + unpack_butter_fly(&v7, &v4, &cospi_p16_m16, &cospi_p16_p16, &v5, &v6); + + out[0] = _mm256_add_epi16(v0, v7); + out[1] = _mm256_add_epi16(v1, v6); + out[2] = _mm256_add_epi16(v1, v5); + out[3] = _mm256_add_epi16(v0, v4); + out[4] = _mm256_sub_epi16(v0, v4); + out[5] = _mm256_sub_epi16(v1, v5); + out[6] = _mm256_sub_epi16(v1, v6); + out[7] = _mm256_sub_epi16(v0, v7); +} + +// Coefficients 8-15 before the final butterfly +static INLINE void idct16_10_second_half(const __m256i *in, __m256i *out) { + const __m256i c2p30 = pair256_set_epi16(2 * cospi_30_64, 2 * cospi_30_64); + const __m256i c2p02 = pair256_set_epi16(2 * cospi_2_64, 2 * cospi_2_64); + const __m256i t0 = _mm256_mulhrs_epi16(in[1], c2p30); + const __m256i t7 = _mm256_mulhrs_epi16(in[1], c2p02); + + const __m256i c2m26 = pair256_set_epi16(-2 * cospi_26_64, -2 * cospi_26_64); + const __m256i c2p06 = pair256_set_epi16(2 * cospi_6_64, 2 * cospi_6_64); + const __m256i t3 = _mm256_mulhrs_epi16(in[3], c2m26); + const __m256i t4 = _mm256_mulhrs_epi16(in[3], c2p06); + + const __m256i cospi_m08_p24 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i cospi_p24_p08 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i cospi_m24_m08 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + + __m256i t1, t2, t5, t6; + unpack_butter_fly(&t0, &t7, &cospi_m08_p24, &cospi_p24_p08, &t1, &t6); + unpack_butter_fly(&t3, &t4, &cospi_m24_m08, &cospi_m08_p24, &t2, &t5); + + out[0] = _mm256_add_epi16(t0, t3); + out[1] = _mm256_add_epi16(t1, t2); + out[6] = _mm256_add_epi16(t6, t5); + out[7] = _mm256_add_epi16(t7, t4); + + const __m256i v2 = _mm256_sub_epi16(t1, t2); + const __m256i v3 = _mm256_sub_epi16(t0, t3); + const __m256i v4 = _mm256_sub_epi16(t7, t4); + const __m256i v5 = _mm256_sub_epi16(t6, t5); + const __m256i cospi_p16_p16 = _mm256_set1_epi16((int16_t)cospi_16_64); + const __m256i cospi_p16_m16 = pair256_set_epi16(cospi_16_64, -cospi_16_64); + unpack_butter_fly(&v5, &v2, &cospi_p16_m16, &cospi_p16_p16, &out[2], &out[5]); + unpack_butter_fly(&v4, &v3, &cospi_p16_m16, &cospi_p16_p16, &out[3], &out[4]); +} + +static INLINE void add_sub_butterfly(const __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++; + } +} + +static INLINE void idct16_10(__m256i *in /*in[16]*/) { + __m256i out[16]; + idct16_10_first_half(in, out); + idct16_10_second_half(in, &out[8]); + add_sub_butterfly(out, in, 16); +} + +void aom_idct16x16_10_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i in[16]; + + load_coeff(input, &in[0]); + load_coeff(input + 16, &in[1]); + load_coeff(input + 32, &in[2]); + load_coeff(input + 48, &in[3]); + + transpose_col_to_row_nz4x4(in); + idct16_10(in); + + transpose_col_to_row_nz4x16(in); + idct16_10(in); + + store_buffer_16xN(in, stride, dest, 16); +} + +// Note: +// For 16x16 int16_t matrix +// transpose first 8 columns into first 8 rows. +// Since only upper-left 8x8 are non-zero, the input are first 8 rows (in[8]). +// After transposing, the 8 row vectors are in in[8]. +void transpose_col_to_row_nz8x8(__m256i *in /*in[8]*/) { + __m256i u0 = _mm256_unpacklo_epi16(in[0], in[1]); + __m256i u1 = _mm256_unpackhi_epi16(in[0], in[1]); + __m256i u2 = _mm256_unpacklo_epi16(in[2], in[3]); + __m256i u3 = _mm256_unpackhi_epi16(in[2], in[3]); + + const __m256i v0 = _mm256_unpacklo_epi32(u0, u2); + const __m256i v1 = _mm256_unpackhi_epi32(u0, u2); + const __m256i v2 = _mm256_unpacklo_epi32(u1, u3); + const __m256i v3 = _mm256_unpackhi_epi32(u1, u3); + + u0 = _mm256_unpacklo_epi16(in[4], in[5]); + u1 = _mm256_unpackhi_epi16(in[4], in[5]); + u2 = _mm256_unpacklo_epi16(in[6], in[7]); + u3 = _mm256_unpackhi_epi16(in[6], in[7]); + + const __m256i v4 = _mm256_unpacklo_epi32(u0, u2); + const __m256i v5 = _mm256_unpackhi_epi32(u0, u2); + const __m256i v6 = _mm256_unpacklo_epi32(u1, u3); + const __m256i v7 = _mm256_unpackhi_epi32(u1, u3); + + in[0] = MM256_SHUFFLE_EPI64(v0, v4, 0); + in[1] = MM256_SHUFFLE_EPI64(v0, v4, 3); + in[2] = MM256_SHUFFLE_EPI64(v1, v5, 0); + in[3] = MM256_SHUFFLE_EPI64(v1, v5, 3); + in[4] = MM256_SHUFFLE_EPI64(v2, v6, 0); + in[5] = MM256_SHUFFLE_EPI64(v2, v6, 3); + in[6] = MM256_SHUFFLE_EPI64(v3, v7, 0); + in[7] = MM256_SHUFFLE_EPI64(v3, v7, 3); +} + +// Note: +// For 16x16 int16_t matrix +// transpose first 8 columns into first 8 rows. +// Since only matrix left 8x16 are non-zero, the input are total 16 rows +// (in[16]). +// After transposing, the 8 row vectors are in in[8]. All else are zero. +static INLINE void transpose_col_to_row_nz8x16(__m256i *in /*in[16]*/) { + transpose_col_to_row_nz8x8(in); + transpose_col_to_row_nz8x8(&in[8]); + + int i; + for (i = 0; i < 8; ++i) { + in[i] = _mm256_permute2x128_si256(in[i], in[i + 8], 0x20); + } +} + +static INLINE void idct16_38_first_half(const __m256i *in, __m256i *out) { + const __m256i c2p28 = pair256_set_epi16(2 * cospi_28_64, 2 * cospi_28_64); + const __m256i c2p04 = pair256_set_epi16(2 * cospi_4_64, 2 * cospi_4_64); + __m256i t4 = _mm256_mulhrs_epi16(in[2], c2p28); + __m256i t7 = _mm256_mulhrs_epi16(in[2], c2p04); + + const __m256i c2m20 = pair256_set_epi16(-2 * cospi_20_64, -2 * cospi_20_64); + const __m256i c2p12 = pair256_set_epi16(2 * cospi_12_64, 2 * cospi_12_64); + __m256i t5 = _mm256_mulhrs_epi16(in[6], c2m20); + __m256i t6 = _mm256_mulhrs_epi16(in[6], c2p12); + + const __m256i c2p16 = pair256_set_epi16(2 * cospi_16_64, 2 * cospi_16_64); + const __m256i c2p24 = pair256_set_epi16(2 * cospi_24_64, 2 * cospi_24_64); + const __m256i c2p08 = pair256_set_epi16(2 * cospi_8_64, 2 * cospi_8_64); + const __m256i u0 = _mm256_mulhrs_epi16(in[0], c2p16); + const __m256i u1 = _mm256_mulhrs_epi16(in[0], c2p16); + const __m256i u2 = _mm256_mulhrs_epi16(in[4], c2p24); + const __m256i u3 = _mm256_mulhrs_epi16(in[4], c2p08); + + const __m256i u4 = _mm256_add_epi16(t4, t5); + const __m256i u5 = _mm256_sub_epi16(t4, t5); + const __m256i u6 = _mm256_sub_epi16(t7, t6); + const __m256i u7 = _mm256_add_epi16(t7, t6); + + const __m256i t0 = _mm256_add_epi16(u0, u3); + const __m256i t1 = _mm256_add_epi16(u1, u2); + const __m256i t2 = _mm256_sub_epi16(u1, u2); + const __m256i t3 = _mm256_sub_epi16(u0, u3); + + t4 = u4; + t7 = u7; + + const __m256i cospi_p16_p16 = _mm256_set1_epi16((int16_t)cospi_16_64); + const __m256i cospi_p16_m16 = pair256_set_epi16(cospi_16_64, -cospi_16_64); + unpack_butter_fly(&u6, &u5, &cospi_p16_m16, &cospi_p16_p16, &t5, &t6); + + out[0] = _mm256_add_epi16(t0, t7); + out[1] = _mm256_add_epi16(t1, t6); + out[2] = _mm256_add_epi16(t2, t5); + out[3] = _mm256_add_epi16(t3, t4); + out[4] = _mm256_sub_epi16(t3, t4); + out[5] = _mm256_sub_epi16(t2, t5); + out[6] = _mm256_sub_epi16(t1, t6); + out[7] = _mm256_sub_epi16(t0, t7); +} + +static INLINE void idct16_38_second_half(const __m256i *in, __m256i *out) { + const __m256i c2p30 = pair256_set_epi16(2 * cospi_30_64, 2 * cospi_30_64); + const __m256i c2p02 = pair256_set_epi16(2 * cospi_2_64, 2 * cospi_2_64); + __m256i t0 = _mm256_mulhrs_epi16(in[1], c2p30); + __m256i t7 = _mm256_mulhrs_epi16(in[1], c2p02); + + const __m256i c2m18 = pair256_set_epi16(-2 * cospi_18_64, -2 * cospi_18_64); + const __m256i c2p14 = pair256_set_epi16(2 * cospi_14_64, 2 * cospi_14_64); + __m256i t1 = _mm256_mulhrs_epi16(in[7], c2m18); + __m256i t6 = _mm256_mulhrs_epi16(in[7], c2p14); + + const __m256i c2p22 = pair256_set_epi16(2 * cospi_22_64, 2 * cospi_22_64); + const __m256i c2p10 = pair256_set_epi16(2 * cospi_10_64, 2 * cospi_10_64); + __m256i t2 = _mm256_mulhrs_epi16(in[5], c2p22); + __m256i t5 = _mm256_mulhrs_epi16(in[5], c2p10); + + const __m256i c2m26 = pair256_set_epi16(-2 * cospi_26_64, -2 * cospi_26_64); + const __m256i c2p06 = pair256_set_epi16(2 * cospi_6_64, 2 * cospi_6_64); + __m256i t3 = _mm256_mulhrs_epi16(in[3], c2m26); + __m256i t4 = _mm256_mulhrs_epi16(in[3], c2p06); + + __m256i v0, v1, v2, v3, v4, v5, v6, v7; + v0 = _mm256_add_epi16(t0, t1); + v1 = _mm256_sub_epi16(t0, t1); + v2 = _mm256_sub_epi16(t3, t2); + v3 = _mm256_add_epi16(t2, t3); + v4 = _mm256_add_epi16(t4, t5); + v5 = _mm256_sub_epi16(t4, t5); + v6 = _mm256_sub_epi16(t7, t6); + v7 = _mm256_add_epi16(t6, t7); + + t0 = v0; + t7 = v7; + t3 = v3; + t4 = v4; + const __m256i cospi_m08_p24 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i cospi_p24_p08 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i cospi_m24_m08 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + unpack_butter_fly(&v1, &v6, &cospi_m08_p24, &cospi_p24_p08, &t1, &t6); + unpack_butter_fly(&v2, &v5, &cospi_m24_m08, &cospi_m08_p24, &t2, &t5); + + v0 = _mm256_add_epi16(t0, t3); + v1 = _mm256_add_epi16(t1, t2); + v2 = _mm256_sub_epi16(t1, t2); + v3 = _mm256_sub_epi16(t0, t3); + v4 = _mm256_sub_epi16(t7, t4); + v5 = _mm256_sub_epi16(t6, t5); + v6 = _mm256_add_epi16(t6, t5); + v7 = _mm256_add_epi16(t7, t4); + + // stage 6, (8-15) + out[0] = v0; + out[1] = v1; + out[6] = v6; + out[7] = v7; + const __m256i cospi_p16_p16 = _mm256_set1_epi16((int16_t)cospi_16_64); + const __m256i cospi_p16_m16 = pair256_set_epi16(cospi_16_64, -cospi_16_64); + unpack_butter_fly(&v5, &v2, &cospi_p16_m16, &cospi_p16_p16, &out[2], &out[5]); + unpack_butter_fly(&v4, &v3, &cospi_p16_m16, &cospi_p16_p16, &out[3], &out[4]); +} + +static INLINE void idct16_38(__m256i *in /*in[16]*/) { + __m256i out[16]; + idct16_38_first_half(in, out); + idct16_38_second_half(in, &out[8]); + add_sub_butterfly(out, in, 16); +} + +void aom_idct16x16_38_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i in[16]; + + int i; + for (i = 0; i < 8; ++i) { + load_coeff(input + (i << 4), &in[i]); + } + + transpose_col_to_row_nz8x8(in); + idct16_38(in); + + transpose_col_to_row_nz8x16(in); + idct16_38(in); + + store_buffer_16xN(in, stride, dest, 16); +} + +static INLINE int calculate_dc(const tran_low_t *input) { + int dc = (int)dct_const_round_shift(input[0] * cospi_16_64); + dc = (int)dct_const_round_shift(dc * cospi_16_64); + dc = ROUND_POWER_OF_TWO(dc, IDCT_ROUNDING_POS); + return dc; +} + +void aom_idct16x16_1_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + const int dc = calculate_dc(input); + if (dc == 0) return; + + const __m256i dc_value = _mm256_set1_epi16(dc); + + int i; + for (i = 0; i < 16; ++i) { + recon_and_store(&dc_value, dest); + dest += stride; + } +} + +// ----------------------------------------------------------------------------- +// 32x32 partial IDCT + +void aom_idct32x32_1_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + const int dc = calculate_dc(input); + if (dc == 0) return; + + const __m256i dc_value = _mm256_set1_epi16(dc); + + int i; + for (i = 0; i < 32; ++i) { + recon_and_store(&dc_value, dest); + recon_and_store(&dc_value, dest + 16); + dest += stride; + } +} + +static void load_buffer_32x16(const tran_low_t *input, __m256i *in /*in[32]*/) { + int i; + for (i = 0; i < 16; ++i) { + load_coeff(input, &in[i]); + load_coeff(input + 16, &in[i + 16]); + input += 32; + } +} + +// Note: +// We extend SSSE3 operations to AVX2. Instead of operating on __m128i, we +// operate coefficients on __m256i. Our operation capacity doubles for each +// instruction. +#define BUTTERFLY_PAIR(x0, x1, co0, co1) \ + do { \ + tmp0 = _mm256_madd_epi16(x0, co0); \ + tmp1 = _mm256_madd_epi16(x1, co0); \ + tmp2 = _mm256_madd_epi16(x0, co1); \ + tmp3 = _mm256_madd_epi16(x1, co1); \ + tmp0 = _mm256_add_epi32(tmp0, rounding); \ + tmp1 = _mm256_add_epi32(tmp1, rounding); \ + tmp2 = _mm256_add_epi32(tmp2, rounding); \ + tmp3 = _mm256_add_epi32(tmp3, rounding); \ + tmp0 = _mm256_srai_epi32(tmp0, DCT_CONST_BITS); \ + tmp1 = _mm256_srai_epi32(tmp1, DCT_CONST_BITS); \ + tmp2 = _mm256_srai_epi32(tmp2, DCT_CONST_BITS); \ + tmp3 = _mm256_srai_epi32(tmp3, DCT_CONST_BITS); \ + } while (0) + +static INLINE void butterfly(const __m256i *x0, const __m256i *x1, + const __m256i *c0, const __m256i *c1, __m256i *y0, + __m256i *y1) { + __m256i tmp0, tmp1, tmp2, tmp3, u0, u1; + const __m256i rounding = _mm256_set1_epi32(DCT_CONST_ROUNDING); + + u0 = _mm256_unpacklo_epi16(*x0, *x1); + u1 = _mm256_unpackhi_epi16(*x0, *x1); + BUTTERFLY_PAIR(u0, u1, *c0, *c1); + *y0 = _mm256_packs_epi32(tmp0, tmp1); + *y1 = _mm256_packs_epi32(tmp2, tmp3); +} + +static INLINE void butterfly_self(__m256i *x0, __m256i *x1, const __m256i *c0, + const __m256i *c1) { + __m256i tmp0, tmp1, tmp2, tmp3, u0, u1; + const __m256i rounding = _mm256_set1_epi32(DCT_CONST_ROUNDING); + + u0 = _mm256_unpacklo_epi16(*x0, *x1); + u1 = _mm256_unpackhi_epi16(*x0, *x1); + BUTTERFLY_PAIR(u0, u1, *c0, *c1); + *x0 = _mm256_packs_epi32(tmp0, tmp1); + *x1 = _mm256_packs_epi32(tmp2, tmp3); +} + +// For each 16x32 block __m256i in[32], +// Input with index, 2, 6, 10, 14, 18, 22, 26, 30 +// output pixels: 8-15 in __m256i in[32] +static void idct32_full_16x32_quarter_2(const __m256i *in /*in[32]*/, + __m256i *out /*out[16]*/) { + __m256i u8, u9, u10, u11, u12, u13, u14, u15; // stp2_ + __m256i v8, v9, v10, v11, v12, v13, v14, v15; // stp1_ + + { + const __m256i stg2_0 = pair256_set_epi16(cospi_30_64, -cospi_2_64); + const __m256i stg2_1 = pair256_set_epi16(cospi_2_64, cospi_30_64); + const __m256i stg2_2 = pair256_set_epi16(cospi_14_64, -cospi_18_64); + const __m256i stg2_3 = pair256_set_epi16(cospi_18_64, cospi_14_64); + butterfly(&in[2], &in[30], &stg2_0, &stg2_1, &u8, &u15); + butterfly(&in[18], &in[14], &stg2_2, &stg2_3, &u9, &u14); + } + + v8 = _mm256_add_epi16(u8, u9); + v9 = _mm256_sub_epi16(u8, u9); + v14 = _mm256_sub_epi16(u15, u14); + v15 = _mm256_add_epi16(u15, u14); + + { + const __m256i stg2_4 = pair256_set_epi16(cospi_22_64, -cospi_10_64); + const __m256i stg2_5 = pair256_set_epi16(cospi_10_64, cospi_22_64); + const __m256i stg2_6 = pair256_set_epi16(cospi_6_64, -cospi_26_64); + const __m256i stg2_7 = pair256_set_epi16(cospi_26_64, cospi_6_64); + butterfly(&in[10], &in[22], &stg2_4, &stg2_5, &u10, &u13); + butterfly(&in[26], &in[6], &stg2_6, &stg2_7, &u11, &u12); + } + + v10 = _mm256_sub_epi16(u11, u10); + v11 = _mm256_add_epi16(u11, u10); + v12 = _mm256_add_epi16(u12, u13); + v13 = _mm256_sub_epi16(u12, u13); + + { + const __m256i stg4_4 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i stg4_5 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i stg4_6 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + butterfly_self(&v9, &v14, &stg4_4, &stg4_5); + butterfly_self(&v10, &v13, &stg4_6, &stg4_4); + } + + out[0] = _mm256_add_epi16(v8, v11); + out[1] = _mm256_add_epi16(v9, v10); + out[6] = _mm256_add_epi16(v14, v13); + out[7] = _mm256_add_epi16(v15, v12); + + out[2] = _mm256_sub_epi16(v9, v10); + out[3] = _mm256_sub_epi16(v8, v11); + out[4] = _mm256_sub_epi16(v15, v12); + out[5] = _mm256_sub_epi16(v14, v13); + + { + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stg6_0 = pair256_set_epi16(-cospi_16_64, cospi_16_64); + butterfly_self(&out[2], &out[5], &stg6_0, &stg4_0); + butterfly_self(&out[3], &out[4], &stg6_0, &stg4_0); + } +} + +// For each 8x32 block __m256i in[32], +// Input with index, 0, 4, 8, 12, 16, 20, 24, 28 +// output pixels: 0-7 in __m256i in[32] +static void idct32_full_16x32_quarter_1(const __m256i *in /*in[32]*/, + __m256i *out /*out[8]*/) { + __m256i u0, u1, u2, u3, u4, u5, u6, u7; // stp1_ + __m256i v0, v1, v2, v3, v4, v5, v6, v7; // stp2_ + + { + const __m256i stg3_0 = pair256_set_epi16(cospi_28_64, -cospi_4_64); + const __m256i stg3_1 = pair256_set_epi16(cospi_4_64, cospi_28_64); + const __m256i stg3_2 = pair256_set_epi16(cospi_12_64, -cospi_20_64); + const __m256i stg3_3 = pair256_set_epi16(cospi_20_64, cospi_12_64); + butterfly(&in[4], &in[28], &stg3_0, &stg3_1, &u4, &u7); + butterfly(&in[20], &in[12], &stg3_2, &stg3_3, &u5, &u6); + } + + v4 = _mm256_add_epi16(u4, u5); + v5 = _mm256_sub_epi16(u4, u5); + v6 = _mm256_sub_epi16(u7, u6); + v7 = _mm256_add_epi16(u7, u6); + + { + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stg4_1 = pair256_set_epi16(cospi_16_64, -cospi_16_64); + const __m256i stg4_2 = pair256_set_epi16(cospi_24_64, -cospi_8_64); + const __m256i stg4_3 = pair256_set_epi16(cospi_8_64, cospi_24_64); + butterfly(&v6, &v5, &stg4_1, &stg4_0, &v5, &v6); + + butterfly(&in[0], &in[16], &stg4_0, &stg4_1, &u0, &u1); + butterfly(&in[8], &in[24], &stg4_2, &stg4_3, &u2, &u3); + } + + v0 = _mm256_add_epi16(u0, u3); + v1 = _mm256_add_epi16(u1, u2); + v2 = _mm256_sub_epi16(u1, u2); + v3 = _mm256_sub_epi16(u0, u3); + + out[0] = _mm256_add_epi16(v0, v7); + out[1] = _mm256_add_epi16(v1, v6); + out[2] = _mm256_add_epi16(v2, v5); + out[3] = _mm256_add_epi16(v3, v4); + out[4] = _mm256_sub_epi16(v3, v4); + out[5] = _mm256_sub_epi16(v2, v5); + out[6] = _mm256_sub_epi16(v1, v6); + out[7] = _mm256_sub_epi16(v0, v7); +} + +// For each 8x32 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 in[32] +// We avoid hide an offset, 16, inside this function. So we output 0-15 into +// array out[16] +static void idct32_full_16x32_quarter_3_4(const __m256i *in /*in[32]*/, + __m256i *out /*out[16]*/) { + __m256i v16, v17, v18, v19, v20, v21, v22, v23; + __m256i v24, v25, v26, v27, v28, v29, v30, v31; + __m256i u16, u17, u18, u19, u20, u21, u22, u23; + __m256i u24, u25, u26, u27, u28, u29, u30, u31; + + { + const __m256i stg1_0 = pair256_set_epi16(cospi_31_64, -cospi_1_64); + const __m256i stg1_1 = pair256_set_epi16(cospi_1_64, cospi_31_64); + const __m256i stg1_2 = pair256_set_epi16(cospi_15_64, -cospi_17_64); + const __m256i stg1_3 = pair256_set_epi16(cospi_17_64, cospi_15_64); + const __m256i stg1_4 = pair256_set_epi16(cospi_23_64, -cospi_9_64); + const __m256i stg1_5 = pair256_set_epi16(cospi_9_64, cospi_23_64); + const __m256i stg1_6 = pair256_set_epi16(cospi_7_64, -cospi_25_64); + const __m256i stg1_7 = pair256_set_epi16(cospi_25_64, cospi_7_64); + const __m256i stg1_8 = pair256_set_epi16(cospi_27_64, -cospi_5_64); + const __m256i stg1_9 = pair256_set_epi16(cospi_5_64, cospi_27_64); + const __m256i stg1_10 = pair256_set_epi16(cospi_11_64, -cospi_21_64); + const __m256i stg1_11 = pair256_set_epi16(cospi_21_64, cospi_11_64); + const __m256i stg1_12 = pair256_set_epi16(cospi_19_64, -cospi_13_64); + const __m256i stg1_13 = pair256_set_epi16(cospi_13_64, cospi_19_64); + const __m256i stg1_14 = pair256_set_epi16(cospi_3_64, -cospi_29_64); + const __m256i stg1_15 = pair256_set_epi16(cospi_29_64, cospi_3_64); + butterfly(&in[1], &in[31], &stg1_0, &stg1_1, &u16, &u31); + butterfly(&in[17], &in[15], &stg1_2, &stg1_3, &u17, &u30); + butterfly(&in[9], &in[23], &stg1_4, &stg1_5, &u18, &u29); + butterfly(&in[25], &in[7], &stg1_6, &stg1_7, &u19, &u28); + + butterfly(&in[5], &in[27], &stg1_8, &stg1_9, &u20, &u27); + butterfly(&in[21], &in[11], &stg1_10, &stg1_11, &u21, &u26); + + butterfly(&in[13], &in[19], &stg1_12, &stg1_13, &u22, &u25); + butterfly(&in[29], &in[3], &stg1_14, &stg1_15, &u23, &u24); + } + + v16 = _mm256_add_epi16(u16, u17); + v17 = _mm256_sub_epi16(u16, u17); + v18 = _mm256_sub_epi16(u19, u18); + v19 = _mm256_add_epi16(u19, u18); + + v20 = _mm256_add_epi16(u20, u21); + v21 = _mm256_sub_epi16(u20, u21); + v22 = _mm256_sub_epi16(u23, u22); + v23 = _mm256_add_epi16(u23, u22); + + v24 = _mm256_add_epi16(u24, u25); + v25 = _mm256_sub_epi16(u24, u25); + v26 = _mm256_sub_epi16(u27, u26); + v27 = _mm256_add_epi16(u27, u26); + + v28 = _mm256_add_epi16(u28, u29); + v29 = _mm256_sub_epi16(u28, u29); + v30 = _mm256_sub_epi16(u31, u30); + v31 = _mm256_add_epi16(u31, u30); + + { + const __m256i stg3_4 = pair256_set_epi16(-cospi_4_64, cospi_28_64); + const __m256i stg3_5 = pair256_set_epi16(cospi_28_64, cospi_4_64); + const __m256i stg3_6 = pair256_set_epi16(-cospi_28_64, -cospi_4_64); + const __m256i stg3_8 = pair256_set_epi16(-cospi_20_64, cospi_12_64); + const __m256i stg3_9 = pair256_set_epi16(cospi_12_64, cospi_20_64); + const __m256i stg3_10 = pair256_set_epi16(-cospi_12_64, -cospi_20_64); + butterfly_self(&v17, &v30, &stg3_4, &stg3_5); + butterfly_self(&v18, &v29, &stg3_6, &stg3_4); + butterfly_self(&v21, &v26, &stg3_8, &stg3_9); + butterfly_self(&v22, &v25, &stg3_10, &stg3_8); + } + + u16 = _mm256_add_epi16(v16, v19); + u17 = _mm256_add_epi16(v17, v18); + u18 = _mm256_sub_epi16(v17, v18); + u19 = _mm256_sub_epi16(v16, v19); + u20 = _mm256_sub_epi16(v23, v20); + u21 = _mm256_sub_epi16(v22, v21); + u22 = _mm256_add_epi16(v22, v21); + u23 = _mm256_add_epi16(v23, v20); + + u24 = _mm256_add_epi16(v24, v27); + u25 = _mm256_add_epi16(v25, v26); + u26 = _mm256_sub_epi16(v25, v26); + u27 = _mm256_sub_epi16(v24, v27); + + u28 = _mm256_sub_epi16(v31, v28); + u29 = _mm256_sub_epi16(v30, v29); + u30 = _mm256_add_epi16(v29, v30); + u31 = _mm256_add_epi16(v28, v31); + + { + const __m256i stg4_4 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i stg4_5 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i stg4_6 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + butterfly_self(&u18, &u29, &stg4_4, &stg4_5); + butterfly_self(&u19, &u28, &stg4_4, &stg4_5); + butterfly_self(&u20, &u27, &stg4_6, &stg4_4); + butterfly_self(&u21, &u26, &stg4_6, &stg4_4); + } + + out[0] = _mm256_add_epi16(u16, u23); + out[1] = _mm256_add_epi16(u17, u22); + out[2] = _mm256_add_epi16(u18, u21); + out[3] = _mm256_add_epi16(u19, u20); + out[4] = _mm256_sub_epi16(u19, u20); + out[5] = _mm256_sub_epi16(u18, u21); + out[6] = _mm256_sub_epi16(u17, u22); + out[7] = _mm256_sub_epi16(u16, u23); + + out[8] = _mm256_sub_epi16(u31, u24); + out[9] = _mm256_sub_epi16(u30, u25); + out[10] = _mm256_sub_epi16(u29, u26); + out[11] = _mm256_sub_epi16(u28, u27); + out[12] = _mm256_add_epi16(u27, u28); + out[13] = _mm256_add_epi16(u26, u29); + out[14] = _mm256_add_epi16(u25, u30); + out[15] = _mm256_add_epi16(u24, u31); + + { + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stg6_0 = pair256_set_epi16(-cospi_16_64, cospi_16_64); + butterfly_self(&out[4], &out[11], &stg6_0, &stg4_0); + butterfly_self(&out[5], &out[10], &stg6_0, &stg4_0); + butterfly_self(&out[6], &out[9], &stg6_0, &stg4_0); + butterfly_self(&out[7], &out[8], &stg6_0, &stg4_0); + } +} + +static void idct32_full_16x32_quarter_1_2(const __m256i *in /*in[32]*/, + __m256i *out /*out[32]*/) { + __m256i temp[16]; + idct32_full_16x32_quarter_1(in, temp); + idct32_full_16x32_quarter_2(in, &temp[8]); + add_sub_butterfly(temp, out, 16); +} + +static void idct32_16x32(const __m256i *in /*in[32]*/, + __m256i *out /*out[32]*/) { + __m256i temp[32]; + idct32_full_16x32_quarter_1_2(in, temp); + idct32_full_16x32_quarter_3_4(in, &temp[16]); + add_sub_butterfly(temp, out, 32); +} + +void aom_idct32x32_1024_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i col[64], in[32]; + int i; + + for (i = 0; i < 2; ++i) { + load_buffer_32x16(input, in); + input += 32 << 4; + + mm256_transpose_16x16(in, in); + mm256_transpose_16x16(&in[16], &in[16]); + idct32_16x32(in, col + (i << 5)); + } + + for (i = 0; i < 2; ++i) { + int j = i << 4; + mm256_transpose_16x16(col + j, in); + mm256_transpose_16x16(col + j + 32, &in[16]); + idct32_16x32(in, in); + store_buffer_16xN(in, stride, dest, 32); + dest += 16; + } +} + +// Group the coefficient calculation into smaller functions +// to prevent stack spillover: +// quarter_1: 0-7 +// quarter_2: 8-15 +// quarter_3_4: 16-23, 24-31 +static void idct32_16x32_135_quarter_1(const __m256i *in /*in[16]*/, + __m256i *out /*out[8]*/) { + __m256i u0, u1, u2, u3, u4, u5, u6, u7; + __m256i v0, v1, v2, v3, v4, v5, v6, v7; + + { + const __m256i stk4_0 = pair256_set_epi16(2 * cospi_16_64, 2 * cospi_16_64); + const __m256i stk4_2 = pair256_set_epi16(2 * cospi_24_64, 2 * cospi_24_64); + const __m256i stk4_3 = pair256_set_epi16(2 * cospi_8_64, 2 * cospi_8_64); + u0 = _mm256_mulhrs_epi16(in[0], stk4_0); + u2 = _mm256_mulhrs_epi16(in[8], stk4_2); + u3 = _mm256_mulhrs_epi16(in[8], stk4_3); + u1 = u0; + } + + v0 = _mm256_add_epi16(u0, u3); + v1 = _mm256_add_epi16(u1, u2); + v2 = _mm256_sub_epi16(u1, u2); + v3 = _mm256_sub_epi16(u0, u3); + + { + const __m256i stk3_0 = pair256_set_epi16(2 * cospi_28_64, 2 * cospi_28_64); + const __m256i stk3_1 = pair256_set_epi16(2 * cospi_4_64, 2 * cospi_4_64); + const __m256i stk3_2 = + pair256_set_epi16(-2 * cospi_20_64, -2 * cospi_20_64); + const __m256i stk3_3 = pair256_set_epi16(2 * cospi_12_64, 2 * cospi_12_64); + u4 = _mm256_mulhrs_epi16(in[4], stk3_0); + u7 = _mm256_mulhrs_epi16(in[4], stk3_1); + u5 = _mm256_mulhrs_epi16(in[12], stk3_2); + u6 = _mm256_mulhrs_epi16(in[12], stk3_3); + } + + v4 = _mm256_add_epi16(u4, u5); + v5 = _mm256_sub_epi16(u4, u5); + v6 = _mm256_sub_epi16(u7, u6); + v7 = _mm256_add_epi16(u7, u6); + + { + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stg4_1 = pair256_set_epi16(cospi_16_64, -cospi_16_64); + butterfly(&v6, &v5, &stg4_1, &stg4_0, &v5, &v6); + } + + out[0] = _mm256_add_epi16(v0, v7); + out[1] = _mm256_add_epi16(v1, v6); + out[2] = _mm256_add_epi16(v2, v5); + out[3] = _mm256_add_epi16(v3, v4); + out[4] = _mm256_sub_epi16(v3, v4); + out[5] = _mm256_sub_epi16(v2, v5); + out[6] = _mm256_sub_epi16(v1, v6); + out[7] = _mm256_sub_epi16(v0, v7); +} + +static void idct32_16x32_135_quarter_2(const __m256i *in /*in[16]*/, + __m256i *out /*out[8]*/) { + __m256i u8, u9, u10, u11, u12, u13, u14, u15; + __m256i v8, v9, v10, v11, v12, v13, v14, v15; + + { + const __m256i stk2_0 = pair256_set_epi16(2 * cospi_30_64, 2 * cospi_30_64); + const __m256i stk2_1 = pair256_set_epi16(2 * cospi_2_64, 2 * cospi_2_64); + const __m256i stk2_2 = + pair256_set_epi16(-2 * cospi_18_64, -2 * cospi_18_64); + const __m256i stk2_3 = pair256_set_epi16(2 * cospi_14_64, 2 * cospi_14_64); + const __m256i stk2_4 = pair256_set_epi16(2 * cospi_22_64, 2 * cospi_22_64); + const __m256i stk2_5 = pair256_set_epi16(2 * cospi_10_64, 2 * cospi_10_64); + const __m256i stk2_6 = + pair256_set_epi16(-2 * cospi_26_64, -2 * cospi_26_64); + const __m256i stk2_7 = pair256_set_epi16(2 * cospi_6_64, 2 * cospi_6_64); + u8 = _mm256_mulhrs_epi16(in[2], stk2_0); + u15 = _mm256_mulhrs_epi16(in[2], stk2_1); + u9 = _mm256_mulhrs_epi16(in[14], stk2_2); + u14 = _mm256_mulhrs_epi16(in[14], stk2_3); + u10 = _mm256_mulhrs_epi16(in[10], stk2_4); + u13 = _mm256_mulhrs_epi16(in[10], stk2_5); + u11 = _mm256_mulhrs_epi16(in[6], stk2_6); + u12 = _mm256_mulhrs_epi16(in[6], stk2_7); + } + + v8 = _mm256_add_epi16(u8, u9); + v9 = _mm256_sub_epi16(u8, u9); + v10 = _mm256_sub_epi16(u11, u10); + v11 = _mm256_add_epi16(u11, u10); + v12 = _mm256_add_epi16(u12, u13); + v13 = _mm256_sub_epi16(u12, u13); + v14 = _mm256_sub_epi16(u15, u14); + v15 = _mm256_add_epi16(u15, u14); + + { + const __m256i stg4_4 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i stg4_5 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i stg4_6 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + butterfly_self(&v9, &v14, &stg4_4, &stg4_5); + butterfly_self(&v10, &v13, &stg4_6, &stg4_4); + } + + out[0] = _mm256_add_epi16(v8, v11); + out[1] = _mm256_add_epi16(v9, v10); + out[2] = _mm256_sub_epi16(v9, v10); + out[3] = _mm256_sub_epi16(v8, v11); + out[4] = _mm256_sub_epi16(v15, v12); + out[5] = _mm256_sub_epi16(v14, v13); + out[6] = _mm256_add_epi16(v14, v13); + out[7] = _mm256_add_epi16(v15, v12); + + { + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stg6_0 = pair256_set_epi16(-cospi_16_64, cospi_16_64); + butterfly_self(&out[2], &out[5], &stg6_0, &stg4_0); + butterfly_self(&out[3], &out[4], &stg6_0, &stg4_0); + } +} + +// 8x32 block even indexed 8 inputs of in[16], +// output first half 16 to out[32] +static void idct32_16x32_quarter_1_2(const __m256i *in /*in[16]*/, + __m256i *out /*out[32]*/) { + __m256i temp[16]; + idct32_16x32_135_quarter_1(in, temp); + idct32_16x32_135_quarter_2(in, &temp[8]); + add_sub_butterfly(temp, out, 16); +} + +// 8x32 block odd indexed 8 inputs of in[16], +// output second half 16 to out[32] +static void idct32_16x32_quarter_3_4(const __m256i *in /*in[16]*/, + __m256i *out /*out[32]*/) { + __m256i v16, v17, v18, v19, v20, v21, v22, v23; + __m256i v24, v25, v26, v27, v28, v29, v30, v31; + __m256i u16, u17, u18, u19, u20, u21, u22, u23; + __m256i u24, u25, u26, u27, u28, u29, u30, u31; + + { + const __m256i stk1_0 = pair256_set_epi16(2 * cospi_31_64, 2 * cospi_31_64); + const __m256i stk1_1 = pair256_set_epi16(2 * cospi_1_64, 2 * cospi_1_64); + const __m256i stk1_2 = + pair256_set_epi16(-2 * cospi_17_64, -2 * cospi_17_64); + const __m256i stk1_3 = pair256_set_epi16(2 * cospi_15_64, 2 * cospi_15_64); + + const __m256i stk1_4 = pair256_set_epi16(2 * cospi_23_64, 2 * cospi_23_64); + const __m256i stk1_5 = pair256_set_epi16(2 * cospi_9_64, 2 * cospi_9_64); + const __m256i stk1_6 = + pair256_set_epi16(-2 * cospi_25_64, -2 * cospi_25_64); + const __m256i stk1_7 = pair256_set_epi16(2 * cospi_7_64, 2 * cospi_7_64); + const __m256i stk1_8 = pair256_set_epi16(2 * cospi_27_64, 2 * cospi_27_64); + const __m256i stk1_9 = pair256_set_epi16(2 * cospi_5_64, 2 * cospi_5_64); + const __m256i stk1_10 = + pair256_set_epi16(-2 * cospi_21_64, -2 * cospi_21_64); + const __m256i stk1_11 = pair256_set_epi16(2 * cospi_11_64, 2 * cospi_11_64); + + const __m256i stk1_12 = pair256_set_epi16(2 * cospi_19_64, 2 * cospi_19_64); + const __m256i stk1_13 = pair256_set_epi16(2 * cospi_13_64, 2 * cospi_13_64); + const __m256i stk1_14 = + pair256_set_epi16(-2 * cospi_29_64, -2 * cospi_29_64); + const __m256i stk1_15 = pair256_set_epi16(2 * cospi_3_64, 2 * cospi_3_64); + u16 = _mm256_mulhrs_epi16(in[1], stk1_0); + u31 = _mm256_mulhrs_epi16(in[1], stk1_1); + u17 = _mm256_mulhrs_epi16(in[15], stk1_2); + u30 = _mm256_mulhrs_epi16(in[15], stk1_3); + + u18 = _mm256_mulhrs_epi16(in[9], stk1_4); + u29 = _mm256_mulhrs_epi16(in[9], stk1_5); + u19 = _mm256_mulhrs_epi16(in[7], stk1_6); + u28 = _mm256_mulhrs_epi16(in[7], stk1_7); + + u20 = _mm256_mulhrs_epi16(in[5], stk1_8); + u27 = _mm256_mulhrs_epi16(in[5], stk1_9); + u21 = _mm256_mulhrs_epi16(in[11], stk1_10); + u26 = _mm256_mulhrs_epi16(in[11], stk1_11); + + u22 = _mm256_mulhrs_epi16(in[13], stk1_12); + u25 = _mm256_mulhrs_epi16(in[13], stk1_13); + u23 = _mm256_mulhrs_epi16(in[3], stk1_14); + u24 = _mm256_mulhrs_epi16(in[3], stk1_15); + } + + v16 = _mm256_add_epi16(u16, u17); + v17 = _mm256_sub_epi16(u16, u17); + v18 = _mm256_sub_epi16(u19, u18); + v19 = _mm256_add_epi16(u19, u18); + + v20 = _mm256_add_epi16(u20, u21); + v21 = _mm256_sub_epi16(u20, u21); + v22 = _mm256_sub_epi16(u23, u22); + v23 = _mm256_add_epi16(u23, u22); + + v24 = _mm256_add_epi16(u24, u25); + v25 = _mm256_sub_epi16(u24, u25); + v26 = _mm256_sub_epi16(u27, u26); + v27 = _mm256_add_epi16(u27, u26); + + v28 = _mm256_add_epi16(u28, u29); + v29 = _mm256_sub_epi16(u28, u29); + v30 = _mm256_sub_epi16(u31, u30); + v31 = _mm256_add_epi16(u31, u30); + + { + const __m256i stg3_4 = pair256_set_epi16(-cospi_4_64, cospi_28_64); + const __m256i stg3_5 = pair256_set_epi16(cospi_28_64, cospi_4_64); + const __m256i stg3_6 = pair256_set_epi16(-cospi_28_64, -cospi_4_64); + const __m256i stg3_8 = pair256_set_epi16(-cospi_20_64, cospi_12_64); + const __m256i stg3_9 = pair256_set_epi16(cospi_12_64, cospi_20_64); + const __m256i stg3_10 = pair256_set_epi16(-cospi_12_64, -cospi_20_64); + + butterfly_self(&v17, &v30, &stg3_4, &stg3_5); + butterfly_self(&v18, &v29, &stg3_6, &stg3_4); + butterfly_self(&v21, &v26, &stg3_8, &stg3_9); + butterfly_self(&v22, &v25, &stg3_10, &stg3_8); + } + + u16 = _mm256_add_epi16(v16, v19); + u17 = _mm256_add_epi16(v17, v18); + u18 = _mm256_sub_epi16(v17, v18); + u19 = _mm256_sub_epi16(v16, v19); + u20 = _mm256_sub_epi16(v23, v20); + u21 = _mm256_sub_epi16(v22, v21); + u22 = _mm256_add_epi16(v22, v21); + u23 = _mm256_add_epi16(v23, v20); + + u24 = _mm256_add_epi16(v24, v27); + u25 = _mm256_add_epi16(v25, v26); + u26 = _mm256_sub_epi16(v25, v26); + u27 = _mm256_sub_epi16(v24, v27); + u28 = _mm256_sub_epi16(v31, v28); + u29 = _mm256_sub_epi16(v30, v29); + u30 = _mm256_add_epi16(v29, v30); + u31 = _mm256_add_epi16(v28, v31); + + { + const __m256i stg4_4 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i stg4_5 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i stg4_6 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + butterfly_self(&u18, &u29, &stg4_4, &stg4_5); + butterfly_self(&u19, &u28, &stg4_4, &stg4_5); + butterfly_self(&u20, &u27, &stg4_6, &stg4_4); + butterfly_self(&u21, &u26, &stg4_6, &stg4_4); + } + + out[0] = _mm256_add_epi16(u16, u23); + out[1] = _mm256_add_epi16(u17, u22); + out[2] = _mm256_add_epi16(u18, u21); + out[3] = _mm256_add_epi16(u19, u20); + v20 = _mm256_sub_epi16(u19, u20); + v21 = _mm256_sub_epi16(u18, u21); + v22 = _mm256_sub_epi16(u17, u22); + v23 = _mm256_sub_epi16(u16, u23); + + v24 = _mm256_sub_epi16(u31, u24); + v25 = _mm256_sub_epi16(u30, u25); + v26 = _mm256_sub_epi16(u29, u26); + v27 = _mm256_sub_epi16(u28, u27); + out[12] = _mm256_add_epi16(u27, u28); + out[13] = _mm256_add_epi16(u26, u29); + out[14] = _mm256_add_epi16(u25, u30); + out[15] = _mm256_add_epi16(u24, u31); + + { + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stg6_0 = pair256_set_epi16(-cospi_16_64, cospi_16_64); + butterfly(&v20, &v27, &stg6_0, &stg4_0, &out[4], &out[11]); + butterfly(&v21, &v26, &stg6_0, &stg4_0, &out[5], &out[10]); + butterfly(&v22, &v25, &stg6_0, &stg4_0, &out[6], &out[9]); + butterfly(&v23, &v24, &stg6_0, &stg4_0, &out[7], &out[8]); + } +} + +// 16x16 block input __m256i in[32], output 16x32 __m256i in[32] +static void idct32_16x32_135(__m256i *in /*in[32]*/) { + __m256i out[32]; + idct32_16x32_quarter_1_2(in, out); + idct32_16x32_quarter_3_4(in, &out[16]); + add_sub_butterfly(out, in, 32); +} + +static INLINE void load_buffer_from_32x32(const tran_low_t *coeff, __m256i *in, + int size) { + int i = 0; + while (i < size) { + load_coeff(coeff + (i << 5), &in[i]); + i += 1; + } +} + +static INLINE void zero_buffer(__m256i *in, int num) { + int i; + for (i = 0; i < num; ++i) { + in[i] = _mm256_setzero_si256(); + } +} + +// Only upper-left 16x16 has non-zero coeff +void aom_idct32x32_135_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i in[32]; + zero_buffer(in, 32); + load_buffer_from_32x32(input, in, 16); + mm256_transpose_16x16(in, in); + idct32_16x32_135(in); + + __m256i out[32]; + mm256_transpose_16x16(in, out); + idct32_16x32_135(out); + store_buffer_16xN(out, stride, dest, 32); + mm256_transpose_16x16(&in[16], in); + idct32_16x32_135(in); + store_buffer_16xN(in, stride, dest + 16, 32); +} + +static void idct32_34_first_half(const __m256i *in, __m256i *stp1) { + const __m256i stk2_0 = pair256_set_epi16(2 * cospi_30_64, 2 * cospi_30_64); + const __m256i stk2_1 = pair256_set_epi16(2 * cospi_2_64, 2 * cospi_2_64); + const __m256i stk2_6 = pair256_set_epi16(-2 * cospi_26_64, -2 * cospi_26_64); + const __m256i stk2_7 = pair256_set_epi16(2 * cospi_6_64, 2 * cospi_6_64); + + const __m256i stk3_0 = pair256_set_epi16(2 * cospi_28_64, 2 * cospi_28_64); + const __m256i stk3_1 = pair256_set_epi16(2 * cospi_4_64, 2 * cospi_4_64); + + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stk4_0 = pair256_set_epi16(2 * cospi_16_64, 2 * cospi_16_64); + const __m256i stg4_1 = pair256_set_epi16(cospi_16_64, -cospi_16_64); + const __m256i stg4_4 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i stg4_5 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i stg4_6 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + + const __m256i stg6_0 = pair256_set_epi16(-cospi_16_64, cospi_16_64); + __m256i u0, u1, u2, u3, u4, u5, u6, u7; + __m256i x0, x1, x4, x5, x6, x7; + __m256i v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15; + + // phase 1 + + // 0, 15 + u2 = _mm256_mulhrs_epi16(in[2], stk2_1); // stp2_15 + u3 = _mm256_mulhrs_epi16(in[6], stk2_7); // stp2_12 + v15 = _mm256_add_epi16(u2, u3); + // in[0], in[4] + x0 = _mm256_mulhrs_epi16(in[0], stk4_0); // stp1[0] + x7 = _mm256_mulhrs_epi16(in[4], stk3_1); // stp1[7] + v0 = _mm256_add_epi16(x0, x7); // stp2_0 + stp1[0] = _mm256_add_epi16(v0, v15); + stp1[15] = _mm256_sub_epi16(v0, v15); + + // in[2], in[6] + u0 = _mm256_mulhrs_epi16(in[2], stk2_0); // stp2_8 + u1 = _mm256_mulhrs_epi16(in[6], stk2_6); // stp2_11 + butterfly(&u0, &u2, &stg4_4, &stg4_5, &u4, &u5); // stp2_9, stp2_14 + butterfly(&u1, &u3, &stg4_6, &stg4_4, &u6, &u7); // stp2_10, stp2_13 + + v8 = _mm256_add_epi16(u0, u1); + v9 = _mm256_add_epi16(u4, u6); + v10 = _mm256_sub_epi16(u4, u6); + v11 = _mm256_sub_epi16(u0, u1); + v12 = _mm256_sub_epi16(u2, u3); + v13 = _mm256_sub_epi16(u5, u7); + v14 = _mm256_add_epi16(u5, u7); + + butterfly_self(&v10, &v13, &stg6_0, &stg4_0); + butterfly_self(&v11, &v12, &stg6_0, &stg4_0); + + // 1, 14 + x1 = _mm256_mulhrs_epi16(in[0], stk4_0); // stp1[1], stk4_1 = stk4_0 + // stp1[2] = stp1[0], stp1[3] = stp1[1] + x4 = _mm256_mulhrs_epi16(in[4], stk3_0); // stp1[4] + butterfly(&x7, &x4, &stg4_1, &stg4_0, &x5, &x6); + v1 = _mm256_add_epi16(x1, x6); // stp2_1 + v2 = _mm256_add_epi16(x0, x5); // stp2_2 + stp1[1] = _mm256_add_epi16(v1, v14); + stp1[14] = _mm256_sub_epi16(v1, v14); + + stp1[2] = _mm256_add_epi16(v2, v13); + stp1[13] = _mm256_sub_epi16(v2, v13); + + v3 = _mm256_add_epi16(x1, x4); // stp2_3 + v4 = _mm256_sub_epi16(x1, x4); // stp2_4 + + v5 = _mm256_sub_epi16(x0, x5); // stp2_5 + + v6 = _mm256_sub_epi16(x1, x6); // stp2_6 + v7 = _mm256_sub_epi16(x0, x7); // stp2_7 + stp1[3] = _mm256_add_epi16(v3, v12); + stp1[12] = _mm256_sub_epi16(v3, v12); + + stp1[6] = _mm256_add_epi16(v6, v9); + stp1[9] = _mm256_sub_epi16(v6, v9); + + stp1[7] = _mm256_add_epi16(v7, v8); + stp1[8] = _mm256_sub_epi16(v7, v8); + + stp1[4] = _mm256_add_epi16(v4, v11); + stp1[11] = _mm256_sub_epi16(v4, v11); + + stp1[5] = _mm256_add_epi16(v5, v10); + stp1[10] = _mm256_sub_epi16(v5, v10); +} + +static void idct32_34_second_half(const __m256i *in, __m256i *stp1) { + const __m256i stk1_0 = pair256_set_epi16(2 * cospi_31_64, 2 * cospi_31_64); + const __m256i stk1_1 = pair256_set_epi16(2 * cospi_1_64, 2 * cospi_1_64); + const __m256i stk1_6 = pair256_set_epi16(-2 * cospi_25_64, -2 * cospi_25_64); + const __m256i stk1_7 = pair256_set_epi16(2 * cospi_7_64, 2 * cospi_7_64); + const __m256i stk1_8 = pair256_set_epi16(2 * cospi_27_64, 2 * cospi_27_64); + const __m256i stk1_9 = pair256_set_epi16(2 * cospi_5_64, 2 * cospi_5_64); + const __m256i stk1_14 = pair256_set_epi16(-2 * cospi_29_64, -2 * cospi_29_64); + const __m256i stk1_15 = pair256_set_epi16(2 * cospi_3_64, 2 * cospi_3_64); + const __m256i stg3_4 = pair256_set_epi16(-cospi_4_64, cospi_28_64); + const __m256i stg3_5 = pair256_set_epi16(cospi_28_64, cospi_4_64); + const __m256i stg3_6 = pair256_set_epi16(-cospi_28_64, -cospi_4_64); + const __m256i stg3_8 = pair256_set_epi16(-cospi_20_64, cospi_12_64); + const __m256i stg3_9 = pair256_set_epi16(cospi_12_64, cospi_20_64); + const __m256i stg3_10 = pair256_set_epi16(-cospi_12_64, -cospi_20_64); + + const __m256i stg4_0 = pair256_set_epi16(cospi_16_64, cospi_16_64); + const __m256i stg4_4 = pair256_set_epi16(-cospi_8_64, cospi_24_64); + const __m256i stg4_5 = pair256_set_epi16(cospi_24_64, cospi_8_64); + const __m256i stg4_6 = pair256_set_epi16(-cospi_24_64, -cospi_8_64); + + const __m256i stg6_0 = pair256_set_epi16(-cospi_16_64, cospi_16_64); + __m256i v16, v17, v18, v19, v20, v21, v22, v23; + __m256i v24, v25, v26, v27, v28, v29, v30, v31; + __m256i u16, u17, u18, u19, u20, u21, u22, u23; + __m256i u24, u25, u26, u27, u28, u29, u30, u31; + + v16 = _mm256_mulhrs_epi16(in[1], stk1_0); + v31 = _mm256_mulhrs_epi16(in[1], stk1_1); + + v19 = _mm256_mulhrs_epi16(in[7], stk1_6); + v28 = _mm256_mulhrs_epi16(in[7], stk1_7); + + v20 = _mm256_mulhrs_epi16(in[5], stk1_8); + v27 = _mm256_mulhrs_epi16(in[5], stk1_9); + + v23 = _mm256_mulhrs_epi16(in[3], stk1_14); + v24 = _mm256_mulhrs_epi16(in[3], stk1_15); + + butterfly(&v16, &v31, &stg3_4, &stg3_5, &v17, &v30); + butterfly(&v19, &v28, &stg3_6, &stg3_4, &v18, &v29); + butterfly(&v20, &v27, &stg3_8, &stg3_9, &v21, &v26); + butterfly(&v23, &v24, &stg3_10, &stg3_8, &v22, &v25); + + u16 = _mm256_add_epi16(v16, v19); + u17 = _mm256_add_epi16(v17, v18); + u18 = _mm256_sub_epi16(v17, v18); + u19 = _mm256_sub_epi16(v16, v19); + u20 = _mm256_sub_epi16(v23, v20); + u21 = _mm256_sub_epi16(v22, v21); + u22 = _mm256_add_epi16(v22, v21); + u23 = _mm256_add_epi16(v23, v20); + u24 = _mm256_add_epi16(v24, v27); + u27 = _mm256_sub_epi16(v24, v27); + u25 = _mm256_add_epi16(v25, v26); + u26 = _mm256_sub_epi16(v25, v26); + u28 = _mm256_sub_epi16(v31, v28); + u31 = _mm256_add_epi16(v28, v31); + u29 = _mm256_sub_epi16(v30, v29); + u30 = _mm256_add_epi16(v29, v30); + + butterfly_self(&u18, &u29, &stg4_4, &stg4_5); + butterfly_self(&u19, &u28, &stg4_4, &stg4_5); + butterfly_self(&u20, &u27, &stg4_6, &stg4_4); + butterfly_self(&u21, &u26, &stg4_6, &stg4_4); + + stp1[0] = _mm256_add_epi16(u16, u23); + stp1[7] = _mm256_sub_epi16(u16, u23); + + stp1[1] = _mm256_add_epi16(u17, u22); + stp1[6] = _mm256_sub_epi16(u17, u22); + + stp1[2] = _mm256_add_epi16(u18, u21); + stp1[5] = _mm256_sub_epi16(u18, u21); + + stp1[3] = _mm256_add_epi16(u19, u20); + stp1[4] = _mm256_sub_epi16(u19, u20); + + stp1[8] = _mm256_sub_epi16(u31, u24); + stp1[15] = _mm256_add_epi16(u24, u31); + + stp1[9] = _mm256_sub_epi16(u30, u25); + stp1[14] = _mm256_add_epi16(u25, u30); + + stp1[10] = _mm256_sub_epi16(u29, u26); + stp1[13] = _mm256_add_epi16(u26, u29); + + stp1[11] = _mm256_sub_epi16(u28, u27); + stp1[12] = _mm256_add_epi16(u27, u28); + + butterfly_self(&stp1[4], &stp1[11], &stg6_0, &stg4_0); + butterfly_self(&stp1[5], &stp1[10], &stg6_0, &stg4_0); + butterfly_self(&stp1[6], &stp1[9], &stg6_0, &stg4_0); + butterfly_self(&stp1[7], &stp1[8], &stg6_0, &stg4_0); +} + +// 16x16 block input __m256i in[32], output 16x32 __m256i in[32] +static void idct32_16x32_34(__m256i *in /*in[32]*/) { + __m256i out[32]; + idct32_34_first_half(in, out); + idct32_34_second_half(in, &out[16]); + add_sub_butterfly(out, in, 32); +} + +// Only upper-left 8x8 has non-zero coeff +void aom_idct32x32_34_add_avx2(const tran_low_t *input, uint8_t *dest, + int stride) { + __m256i in[32]; + zero_buffer(in, 32); + load_buffer_from_32x32(input, in, 8); + mm256_transpose_16x16(in, in); + idct32_16x32_34(in); + + __m256i out[32]; + mm256_transpose_16x16(in, out); + idct32_16x32_34(out); + store_buffer_16xN(out, stride, dest, 32); + mm256_transpose_16x16(&in[16], in); + idct32_16x32_34(in); + store_buffer_16xN(in, stride, dest + 16, 32); +} |