diff options
Diffstat (limited to 'third_party/aom/av1/common/x86/highbd_wiener_convolve_avx2.c')
| -rw-r--r-- | third_party/aom/av1/common/x86/highbd_wiener_convolve_avx2.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/third_party/aom/av1/common/x86/highbd_wiener_convolve_avx2.c b/third_party/aom/av1/common/x86/highbd_wiener_convolve_avx2.c new file mode 100644 index 000000000..0c8a8505b --- /dev/null +++ b/third_party/aom/av1/common/x86/highbd_wiener_convolve_avx2.c @@ -0,0 +1,245 @@ +/* + * Copyright (c) 2018, 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 <assert.h> + +#include "config/aom_dsp_rtcd.h" + +#include "av1/common/convolve.h" +#include "aom_dsp/aom_dsp_common.h" +#include "aom_dsp/aom_filter.h" +#include "aom_dsp/x86/synonyms.h" +#include "aom_dsp/x86/synonyms_avx2.h" + +// 128-bit xmmwords are written as [ ... ] with the MSB on the left. +// 256-bit ymmwords are written as two xmmwords, [ ... ][ ... ] with the MSB +// on the left. +// A row of, say, 16-bit pixels with values p0, p1, p2, ..., p14, p15 will be +// loaded and stored as [ p15 ... p9 p8 ][ p7 ... p1 p0 ]. +void av1_highbd_wiener_convolve_add_src_avx2( + const uint8_t *src8, ptrdiff_t src_stride, uint8_t *dst8, + ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, + const int16_t *filter_y, int y_step_q4, int w, int h, + const ConvolveParams *conv_params, int bd) { + assert(x_step_q4 == 16 && y_step_q4 == 16); + assert(!(w & 7)); + assert(bd + FILTER_BITS - conv_params->round_0 + 2 <= 16); + (void)x_step_q4; + (void)y_step_q4; + + const uint16_t *const src = CONVERT_TO_SHORTPTR(src8); + uint16_t *const dst = CONVERT_TO_SHORTPTR(dst8); + + DECLARE_ALIGNED(32, uint16_t, + temp[(MAX_SB_SIZE + SUBPEL_TAPS - 1) * MAX_SB_SIZE]); + int intermediate_height = h + SUBPEL_TAPS - 1; + const int center_tap = ((SUBPEL_TAPS - 1) / 2); + const uint16_t *const src_ptr = src - center_tap * src_stride - center_tap; + + const __m128i zero_128 = _mm_setzero_si128(); + const __m256i zero_256 = _mm256_setzero_si256(); + + // Add an offset to account for the "add_src" part of the convolve function. + const __m128i offset = _mm_insert_epi16(zero_128, 1 << FILTER_BITS, 3); + + const __m256i clamp_low = zero_256; + + /* Horizontal filter */ + { + const __m256i clamp_high_ep = + _mm256_set1_epi16(WIENER_CLAMP_LIMIT(conv_params->round_0, bd) - 1); + + // coeffs [ f7 f6 f5 f4 f3 f2 f1 f0 ] + const __m128i coeffs_x = _mm_add_epi16(xx_loadu_128(filter_x), offset); + + // coeffs [ f3 f2 f3 f2 f1 f0 f1 f0 ] + const __m128i coeffs_0123 = _mm_unpacklo_epi32(coeffs_x, coeffs_x); + // coeffs [ f7 f6 f7 f6 f5 f4 f5 f4 ] + const __m128i coeffs_4567 = _mm_unpackhi_epi32(coeffs_x, coeffs_x); + + // coeffs [ f1 f0 f1 f0 f1 f0 f1 f0 ] + const __m128i coeffs_01_128 = _mm_unpacklo_epi64(coeffs_0123, coeffs_0123); + // coeffs [ f3 f2 f3 f2 f3 f2 f3 f2 ] + const __m128i coeffs_23_128 = _mm_unpackhi_epi64(coeffs_0123, coeffs_0123); + // coeffs [ f5 f4 f5 f4 f5 f4 f5 f4 ] + const __m128i coeffs_45_128 = _mm_unpacklo_epi64(coeffs_4567, coeffs_4567); + // coeffs [ f7 f6 f7 f6 f7 f6 f7 f6 ] + const __m128i coeffs_67_128 = _mm_unpackhi_epi64(coeffs_4567, coeffs_4567); + + // coeffs [ f1 f0 f1 f0 f1 f0 f1 f0 ][ f1 f0 f1 f0 f1 f0 f1 f0 ] + const __m256i coeffs_01 = yy_set_m128i(coeffs_01_128, coeffs_01_128); + // coeffs [ f3 f2 f3 f2 f3 f2 f3 f2 ][ f3 f2 f3 f2 f3 f2 f3 f2 ] + const __m256i coeffs_23 = yy_set_m128i(coeffs_23_128, coeffs_23_128); + // coeffs [ f5 f4 f5 f4 f5 f4 f5 f4 ][ f5 f4 f5 f4 f5 f4 f5 f4 ] + const __m256i coeffs_45 = yy_set_m128i(coeffs_45_128, coeffs_45_128); + // coeffs [ f7 f6 f7 f6 f7 f6 f7 f6 ][ f7 f6 f7 f6 f7 f6 f7 f6 ] + const __m256i coeffs_67 = yy_set_m128i(coeffs_67_128, coeffs_67_128); + + const __m256i round_const = _mm256_set1_epi32( + (1 << (conv_params->round_0 - 1)) + (1 << (bd + FILTER_BITS - 1))); + + for (int i = 0; i < intermediate_height; ++i) { + for (int j = 0; j < w; j += 16) { + const uint16_t *src_ij = src_ptr + i * src_stride + j; + + // Load 16-bit src data + const __m256i src_0 = yy_loadu_256(src_ij + 0); + const __m256i src_1 = yy_loadu_256(src_ij + 1); + const __m256i src_2 = yy_loadu_256(src_ij + 2); + const __m256i src_3 = yy_loadu_256(src_ij + 3); + const __m256i src_4 = yy_loadu_256(src_ij + 4); + const __m256i src_5 = yy_loadu_256(src_ij + 5); + const __m256i src_6 = yy_loadu_256(src_ij + 6); + const __m256i src_7 = yy_loadu_256(src_ij + 7); + + // Multiply src data by filter coeffs and sum pairs + const __m256i res_0 = _mm256_madd_epi16(src_0, coeffs_01); + const __m256i res_1 = _mm256_madd_epi16(src_1, coeffs_01); + const __m256i res_2 = _mm256_madd_epi16(src_2, coeffs_23); + const __m256i res_3 = _mm256_madd_epi16(src_3, coeffs_23); + const __m256i res_4 = _mm256_madd_epi16(src_4, coeffs_45); + const __m256i res_5 = _mm256_madd_epi16(src_5, coeffs_45); + const __m256i res_6 = _mm256_madd_epi16(src_6, coeffs_67); + const __m256i res_7 = _mm256_madd_epi16(src_7, coeffs_67); + + // Calculate scalar product for even- and odd-indices separately, + // increasing to 32-bit precision + const __m256i res_even_sum = _mm256_add_epi32( + _mm256_add_epi32(res_0, res_4), _mm256_add_epi32(res_2, res_6)); + const __m256i res_even = _mm256_srai_epi32( + _mm256_add_epi32(res_even_sum, round_const), conv_params->round_0); + + const __m256i res_odd_sum = _mm256_add_epi32( + _mm256_add_epi32(res_1, res_5), _mm256_add_epi32(res_3, res_7)); + const __m256i res_odd = _mm256_srai_epi32( + _mm256_add_epi32(res_odd_sum, round_const), conv_params->round_0); + + // Reduce to 16-bit precision and pack even- and odd-index results + // back into one register. The _mm256_packs_epi32 intrinsic returns + // a register with the pixels ordered as follows: + // [ 15 13 11 9 14 12 10 8 ] [ 7 5 3 1 6 4 2 0 ] + const __m256i res = _mm256_packs_epi32(res_even, res_odd); + const __m256i res_clamped = + _mm256_min_epi16(_mm256_max_epi16(res, clamp_low), clamp_high_ep); + + // Store in a temporary array + yy_storeu_256(temp + i * MAX_SB_SIZE + j, res_clamped); + } + } + } + + /* Vertical filter */ + { + const __m256i clamp_high = _mm256_set1_epi16((1 << bd) - 1); + + // coeffs [ f7 f6 f5 f4 f3 f2 f1 f0 ] + const __m128i coeffs_y = _mm_add_epi16(xx_loadu_128(filter_y), offset); + + // coeffs [ f3 f2 f3 f2 f1 f0 f1 f0 ] + const __m128i coeffs_0123 = _mm_unpacklo_epi32(coeffs_y, coeffs_y); + // coeffs [ f7 f6 f7 f6 f5 f4 f5 f4 ] + const __m128i coeffs_4567 = _mm_unpackhi_epi32(coeffs_y, coeffs_y); + + // coeffs [ f1 f0 f1 f0 f1 f0 f1 f0 ] + const __m128i coeffs_01_128 = _mm_unpacklo_epi64(coeffs_0123, coeffs_0123); + // coeffs [ f3 f2 f3 f2 f3 f2 f3 f2 ] + const __m128i coeffs_23_128 = _mm_unpackhi_epi64(coeffs_0123, coeffs_0123); + // coeffs [ f5 f4 f5 f4 f5 f4 f5 f4 ] + const __m128i coeffs_45_128 = _mm_unpacklo_epi64(coeffs_4567, coeffs_4567); + // coeffs [ f7 f6 f7 f6 f7 f6 f7 f6 ] + const __m128i coeffs_67_128 = _mm_unpackhi_epi64(coeffs_4567, coeffs_4567); + + // coeffs [ f1 f0 f1 f0 f1 f0 f1 f0 ][ f1 f0 f1 f0 f1 f0 f1 f0 ] + const __m256i coeffs_01 = yy_set_m128i(coeffs_01_128, coeffs_01_128); + // coeffs [ f3 f2 f3 f2 f3 f2 f3 f2 ][ f3 f2 f3 f2 f3 f2 f3 f2 ] + const __m256i coeffs_23 = yy_set_m128i(coeffs_23_128, coeffs_23_128); + // coeffs [ f5 f4 f5 f4 f5 f4 f5 f4 ][ f5 f4 f5 f4 f5 f4 f5 f4 ] + const __m256i coeffs_45 = yy_set_m128i(coeffs_45_128, coeffs_45_128); + // coeffs [ f7 f6 f7 f6 f7 f6 f7 f6 ][ f7 f6 f7 f6 f7 f6 f7 f6 ] + const __m256i coeffs_67 = yy_set_m128i(coeffs_67_128, coeffs_67_128); + + const __m256i round_const = + _mm256_set1_epi32((1 << (conv_params->round_1 - 1)) - + (1 << (bd + conv_params->round_1 - 1))); + + for (int i = 0; i < h; ++i) { + for (int j = 0; j < w; j += 16) { + const uint16_t *temp_ij = temp + i * MAX_SB_SIZE + j; + + // Load 16-bit data from the output of the horizontal filter in + // which the pixels are ordered as follows: + // [ 15 13 11 9 14 12 10 8 ] [ 7 5 3 1 6 4 2 0 ] + const __m256i data_0 = yy_loadu_256(temp_ij + 0 * MAX_SB_SIZE); + const __m256i data_1 = yy_loadu_256(temp_ij + 1 * MAX_SB_SIZE); + const __m256i data_2 = yy_loadu_256(temp_ij + 2 * MAX_SB_SIZE); + const __m256i data_3 = yy_loadu_256(temp_ij + 3 * MAX_SB_SIZE); + const __m256i data_4 = yy_loadu_256(temp_ij + 4 * MAX_SB_SIZE); + const __m256i data_5 = yy_loadu_256(temp_ij + 5 * MAX_SB_SIZE); + const __m256i data_6 = yy_loadu_256(temp_ij + 6 * MAX_SB_SIZE); + const __m256i data_7 = yy_loadu_256(temp_ij + 7 * MAX_SB_SIZE); + + // Filter the even-indices, increasing to 32-bit precision + const __m256i src_0 = _mm256_unpacklo_epi16(data_0, data_1); + const __m256i src_2 = _mm256_unpacklo_epi16(data_2, data_3); + const __m256i src_4 = _mm256_unpacklo_epi16(data_4, data_5); + const __m256i src_6 = _mm256_unpacklo_epi16(data_6, data_7); + + const __m256i res_0 = _mm256_madd_epi16(src_0, coeffs_01); + const __m256i res_2 = _mm256_madd_epi16(src_2, coeffs_23); + const __m256i res_4 = _mm256_madd_epi16(src_4, coeffs_45); + const __m256i res_6 = _mm256_madd_epi16(src_6, coeffs_67); + + const __m256i res_even = _mm256_add_epi32( + _mm256_add_epi32(res_0, res_2), _mm256_add_epi32(res_4, res_6)); + + // Filter the odd-indices, increasing to 32-bit precision + const __m256i src_1 = _mm256_unpackhi_epi16(data_0, data_1); + const __m256i src_3 = _mm256_unpackhi_epi16(data_2, data_3); + const __m256i src_5 = _mm256_unpackhi_epi16(data_4, data_5); + const __m256i src_7 = _mm256_unpackhi_epi16(data_6, data_7); + + const __m256i res_1 = _mm256_madd_epi16(src_1, coeffs_01); + const __m256i res_3 = _mm256_madd_epi16(src_3, coeffs_23); + const __m256i res_5 = _mm256_madd_epi16(src_5, coeffs_45); + const __m256i res_7 = _mm256_madd_epi16(src_7, coeffs_67); + + const __m256i res_odd = _mm256_add_epi32( + _mm256_add_epi32(res_1, res_3), _mm256_add_epi32(res_5, res_7)); + + // Pixels are currently in the following order: + // res_even order: [ 14 12 10 8 ] [ 6 4 2 0 ] + // res_odd order: [ 15 13 11 9 ] [ 7 5 3 1 ] + // + // Rearrange the pixels into the following order: + // res_lo order: [ 11 10 9 8 ] [ 3 2 1 0 ] + // res_hi order: [ 15 14 13 12 ] [ 7 6 5 4 ] + const __m256i res_lo = _mm256_unpacklo_epi32(res_even, res_odd); + const __m256i res_hi = _mm256_unpackhi_epi32(res_even, res_odd); + + const __m256i res_lo_round = _mm256_srai_epi32( + _mm256_add_epi32(res_lo, round_const), conv_params->round_1); + const __m256i res_hi_round = _mm256_srai_epi32( + _mm256_add_epi32(res_hi, round_const), conv_params->round_1); + + // Reduce to 16-bit precision and pack into the correct order: + // [ 15 14 13 12 11 10 9 8 ][ 7 6 5 4 3 2 1 0 ] + const __m256i res_16bit = + _mm256_packs_epi32(res_lo_round, res_hi_round); + const __m256i res_16bit_clamped = _mm256_min_epi16( + _mm256_max_epi16(res_16bit, clamp_low), clamp_high); + + // Store in the dst array + yy_storeu_256(dst + i * dst_stride + j, res_16bit_clamped); + } + } + } +} |