358 lines
15 KiB
C
358 lines
15 KiB
C
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/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include "aom_dsp/aom_simd.h"
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#define SIMD_FUNC(name) name##_avx2
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#include "av1/common/cdef_block_simd.h"
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// Mask used to shuffle the elements present in 256bit register.
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const int shuffle_reg_256bit[8] = { 0x0b0a0d0c, 0x07060908, 0x03020504,
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0x0f0e0100, 0x0b0a0d0c, 0x07060908,
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0x03020504, 0x0f0e0100 };
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/* partial A is a 16-bit vector of the form:
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[x8 - - x1 | x16 - - x9] and partial B has the form:
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[0 y1 - y7 | 0 y9 - y15].
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This function computes (x1^2+y1^2)*C1 + (x2^2+y2^2)*C2 + ...
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(x7^2+y2^7)*C7 + (x8^2+0^2)*C8 on each 128-bit lane. Here the C1..C8 constants
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are in const1 and const2. */
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static INLINE __m256i fold_mul_and_sum_avx2(__m256i *partiala,
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__m256i *partialb,
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const __m256i *const1,
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const __m256i *const2) {
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__m256i tmp;
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/* Reverse partial B. */
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*partialb = _mm256_shuffle_epi8(
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*partialb, _mm256_loadu_si256((const __m256i *)shuffle_reg_256bit));
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/* Interleave the x and y values of identical indices and pair x8 with 0. */
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tmp = *partiala;
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*partiala = _mm256_unpacklo_epi16(*partiala, *partialb);
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*partialb = _mm256_unpackhi_epi16(tmp, *partialb);
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/* Square and add the corresponding x and y values. */
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*partiala = _mm256_madd_epi16(*partiala, *partiala);
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*partialb = _mm256_madd_epi16(*partialb, *partialb);
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/* Multiply by constant. */
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*partiala = _mm256_mullo_epi32(*partiala, *const1);
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*partialb = _mm256_mullo_epi32(*partialb, *const2);
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/* Sum all results. */
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*partiala = _mm256_add_epi32(*partiala, *partialb);
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return *partiala;
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}
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static INLINE __m256i hsum4_avx2(__m256i *x0, __m256i *x1, __m256i *x2,
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__m256i *x3) {
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const __m256i t0 = _mm256_unpacklo_epi32(*x0, *x1);
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const __m256i t1 = _mm256_unpacklo_epi32(*x2, *x3);
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const __m256i t2 = _mm256_unpackhi_epi32(*x0, *x1);
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const __m256i t3 = _mm256_unpackhi_epi32(*x2, *x3);
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*x0 = _mm256_unpacklo_epi64(t0, t1);
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*x1 = _mm256_unpackhi_epi64(t0, t1);
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*x2 = _mm256_unpacklo_epi64(t2, t3);
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*x3 = _mm256_unpackhi_epi64(t2, t3);
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return _mm256_add_epi32(_mm256_add_epi32(*x0, *x1),
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_mm256_add_epi32(*x2, *x3));
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}
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/* Computes cost for directions 0, 5, 6 and 7. We can call this function again
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to compute the remaining directions. */
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static INLINE __m256i compute_directions_avx2(__m256i *lines,
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int32_t cost_frist_8x8[4],
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int32_t cost_second_8x8[4]) {
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__m256i partial4a, partial4b, partial5a, partial5b, partial7a, partial7b;
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__m256i partial6;
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__m256i tmp;
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/* Partial sums for lines 0 and 1. */
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partial4a = _mm256_slli_si256(lines[0], 14);
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partial4b = _mm256_srli_si256(lines[0], 2);
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partial4a = _mm256_add_epi16(partial4a, _mm256_slli_si256(lines[1], 12));
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partial4b = _mm256_add_epi16(partial4b, _mm256_srli_si256(lines[1], 4));
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tmp = _mm256_add_epi16(lines[0], lines[1]);
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partial5a = _mm256_slli_si256(tmp, 10);
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partial5b = _mm256_srli_si256(tmp, 6);
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partial7a = _mm256_slli_si256(tmp, 4);
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partial7b = _mm256_srli_si256(tmp, 12);
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partial6 = tmp;
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/* Partial sums for lines 2 and 3. */
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partial4a = _mm256_add_epi16(partial4a, _mm256_slli_si256(lines[2], 10));
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partial4b = _mm256_add_epi16(partial4b, _mm256_srli_si256(lines[2], 6));
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partial4a = _mm256_add_epi16(partial4a, _mm256_slli_si256(lines[3], 8));
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partial4b = _mm256_add_epi16(partial4b, _mm256_srli_si256(lines[3], 8));
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tmp = _mm256_add_epi16(lines[2], lines[3]);
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partial5a = _mm256_add_epi16(partial5a, _mm256_slli_si256(tmp, 8));
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partial5b = _mm256_add_epi16(partial5b, _mm256_srli_si256(tmp, 8));
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partial7a = _mm256_add_epi16(partial7a, _mm256_slli_si256(tmp, 6));
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partial7b = _mm256_add_epi16(partial7b, _mm256_srli_si256(tmp, 10));
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partial6 = _mm256_add_epi16(partial6, tmp);
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/* Partial sums for lines 4 and 5. */
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partial4a = _mm256_add_epi16(partial4a, _mm256_slli_si256(lines[4], 6));
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partial4b = _mm256_add_epi16(partial4b, _mm256_srli_si256(lines[4], 10));
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partial4a = _mm256_add_epi16(partial4a, _mm256_slli_si256(lines[5], 4));
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partial4b = _mm256_add_epi16(partial4b, _mm256_srli_si256(lines[5], 12));
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tmp = _mm256_add_epi16(lines[4], lines[5]);
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partial5a = _mm256_add_epi16(partial5a, _mm256_slli_si256(tmp, 6));
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partial5b = _mm256_add_epi16(partial5b, _mm256_srli_si256(tmp, 10));
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partial7a = _mm256_add_epi16(partial7a, _mm256_slli_si256(tmp, 8));
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partial7b = _mm256_add_epi16(partial7b, _mm256_srli_si256(tmp, 8));
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partial6 = _mm256_add_epi16(partial6, tmp);
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/* Partial sums for lines 6 and 7. */
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partial4a = _mm256_add_epi16(partial4a, _mm256_slli_si256(lines[6], 2));
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partial4b = _mm256_add_epi16(partial4b, _mm256_srli_si256(lines[6], 14));
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partial4a = _mm256_add_epi16(partial4a, lines[7]);
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tmp = _mm256_add_epi16(lines[6], lines[7]);
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partial5a = _mm256_add_epi16(partial5a, _mm256_slli_si256(tmp, 4));
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partial5b = _mm256_add_epi16(partial5b, _mm256_srli_si256(tmp, 12));
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partial7a = _mm256_add_epi16(partial7a, _mm256_slli_si256(tmp, 10));
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partial7b = _mm256_add_epi16(partial7b, _mm256_srli_si256(tmp, 6));
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partial6 = _mm256_add_epi16(partial6, tmp);
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const __m256i const_reg_1 =
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_mm256_set_epi32(210, 280, 420, 840, 210, 280, 420, 840);
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const __m256i const_reg_2 =
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_mm256_set_epi32(105, 120, 140, 168, 105, 120, 140, 168);
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const __m256i const_reg_3 = _mm256_set_epi32(210, 420, 0, 0, 210, 420, 0, 0);
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const __m256i const_reg_4 =
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_mm256_set_epi32(105, 105, 105, 140, 105, 105, 105, 140);
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/* Compute costs in terms of partial sums. */
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partial4a =
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fold_mul_and_sum_avx2(&partial4a, &partial4b, &const_reg_1, &const_reg_2);
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partial7a =
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fold_mul_and_sum_avx2(&partial7a, &partial7b, &const_reg_3, &const_reg_4);
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partial5a =
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fold_mul_and_sum_avx2(&partial5a, &partial5b, &const_reg_3, &const_reg_4);
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partial6 = _mm256_madd_epi16(partial6, partial6);
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partial6 = _mm256_mullo_epi32(partial6, _mm256_set1_epi32(105));
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partial4a = hsum4_avx2(&partial4a, &partial5a, &partial6, &partial7a);
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_mm_storeu_si128((__m128i *)cost_frist_8x8,
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_mm256_castsi256_si128(partial4a));
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_mm_storeu_si128((__m128i *)cost_second_8x8,
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_mm256_extractf128_si256(partial4a, 1));
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return partial4a;
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}
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/* transpose and reverse the order of the lines -- equivalent to a 90-degree
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counter-clockwise rotation of the pixels. */
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static INLINE void array_reverse_transpose_8x8_avx2(__m256i *in, __m256i *res) {
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const __m256i tr0_0 = _mm256_unpacklo_epi16(in[0], in[1]);
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const __m256i tr0_1 = _mm256_unpacklo_epi16(in[2], in[3]);
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const __m256i tr0_2 = _mm256_unpackhi_epi16(in[0], in[1]);
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const __m256i tr0_3 = _mm256_unpackhi_epi16(in[2], in[3]);
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const __m256i tr0_4 = _mm256_unpacklo_epi16(in[4], in[5]);
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const __m256i tr0_5 = _mm256_unpacklo_epi16(in[6], in[7]);
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const __m256i tr0_6 = _mm256_unpackhi_epi16(in[4], in[5]);
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const __m256i tr0_7 = _mm256_unpackhi_epi16(in[6], in[7]);
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const __m256i tr1_0 = _mm256_unpacklo_epi32(tr0_0, tr0_1);
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const __m256i tr1_1 = _mm256_unpacklo_epi32(tr0_4, tr0_5);
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const __m256i tr1_2 = _mm256_unpackhi_epi32(tr0_0, tr0_1);
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const __m256i tr1_3 = _mm256_unpackhi_epi32(tr0_4, tr0_5);
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const __m256i tr1_4 = _mm256_unpacklo_epi32(tr0_2, tr0_3);
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const __m256i tr1_5 = _mm256_unpacklo_epi32(tr0_6, tr0_7);
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const __m256i tr1_6 = _mm256_unpackhi_epi32(tr0_2, tr0_3);
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const __m256i tr1_7 = _mm256_unpackhi_epi32(tr0_6, tr0_7);
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res[7] = _mm256_unpacklo_epi64(tr1_0, tr1_1);
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res[6] = _mm256_unpackhi_epi64(tr1_0, tr1_1);
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res[5] = _mm256_unpacklo_epi64(tr1_2, tr1_3);
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res[4] = _mm256_unpackhi_epi64(tr1_2, tr1_3);
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res[3] = _mm256_unpacklo_epi64(tr1_4, tr1_5);
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res[2] = _mm256_unpackhi_epi64(tr1_4, tr1_5);
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res[1] = _mm256_unpacklo_epi64(tr1_6, tr1_7);
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res[0] = _mm256_unpackhi_epi64(tr1_6, tr1_7);
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}
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void cdef_find_dir_dual_avx2(const uint16_t *img1, const uint16_t *img2,
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int stride, int32_t *var_out_1st,
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int32_t *var_out_2nd, int coeff_shift,
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int *out_dir_1st_8x8, int *out_dir_2nd_8x8) {
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int32_t cost_first_8x8[8];
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int32_t cost_second_8x8[8];
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// Used to store the best cost for 2 8x8's.
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int32_t best_cost[2] = { 0 };
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// Best direction for 2 8x8's.
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int best_dir[2] = { 0 };
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const __m128i const_coeff_shift_reg = _mm_cvtsi32_si128(coeff_shift);
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const __m256i const_128_reg = _mm256_set1_epi16(128);
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__m256i lines[8];
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for (int i = 0; i < 8; i++) {
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const __m128i src_1 = _mm_loadu_si128((const __m128i *)&img1[i * stride]);
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const __m128i src_2 = _mm_loadu_si128((const __m128i *)&img2[i * stride]);
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lines[i] = _mm256_insertf128_si256(_mm256_castsi128_si256(src_1), src_2, 1);
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lines[i] = _mm256_sub_epi16(
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_mm256_sra_epi16(lines[i], const_coeff_shift_reg), const_128_reg);
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}
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/* Compute "mostly vertical" directions. */
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const __m256i dir47 =
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compute_directions_avx2(lines, cost_first_8x8 + 4, cost_second_8x8 + 4);
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/* Transpose and reverse the order of the lines. */
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array_reverse_transpose_8x8_avx2(lines, lines);
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/* Compute "mostly horizontal" directions. */
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const __m256i dir03 =
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compute_directions_avx2(lines, cost_first_8x8, cost_second_8x8);
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__m256i max = _mm256_max_epi32(dir03, dir47);
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max =
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_mm256_max_epi32(max, _mm256_or_si256(_mm256_srli_si256(max, 8),
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_mm256_slli_si256(max, 16 - (8))));
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max =
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_mm256_max_epi32(max, _mm256_or_si256(_mm256_srli_si256(max, 4),
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_mm256_slli_si256(max, 16 - (4))));
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const __m128i first_8x8_output = _mm256_castsi256_si128(max);
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const __m128i second_8x8_output = _mm256_extractf128_si256(max, 1);
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const __m128i cmpeg_res_00 =
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_mm_cmpeq_epi32(first_8x8_output, _mm256_castsi256_si128(dir47));
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const __m128i cmpeg_res_01 =
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_mm_cmpeq_epi32(first_8x8_output, _mm256_castsi256_si128(dir03));
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const __m128i cmpeg_res_10 =
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_mm_cmpeq_epi32(second_8x8_output, _mm256_extractf128_si256(dir47, 1));
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const __m128i cmpeg_res_11 =
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_mm_cmpeq_epi32(second_8x8_output, _mm256_extractf128_si256(dir03, 1));
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const __m128i t_first_8x8 = _mm_packs_epi32(cmpeg_res_01, cmpeg_res_00);
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const __m128i t_second_8x8 = _mm_packs_epi32(cmpeg_res_11, cmpeg_res_10);
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best_cost[0] = _mm_cvtsi128_si32(_mm256_castsi256_si128(max));
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best_cost[1] = _mm_cvtsi128_si32(second_8x8_output);
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best_dir[0] = _mm_movemask_epi8(_mm_packs_epi16(t_first_8x8, t_first_8x8));
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best_dir[0] =
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get_msb(best_dir[0] ^ (best_dir[0] - 1)); // Count trailing zeros
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best_dir[1] = _mm_movemask_epi8(_mm_packs_epi16(t_second_8x8, t_second_8x8));
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best_dir[1] =
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get_msb(best_dir[1] ^ (best_dir[1] - 1)); // Count trailing zeros
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/* Difference between the optimal variance and the variance along the
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orthogonal direction. Again, the sum(x^2) terms cancel out. */
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*var_out_1st = best_cost[0] - cost_first_8x8[(best_dir[0] + 4) & 7];
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*var_out_2nd = best_cost[1] - cost_second_8x8[(best_dir[1] + 4) & 7];
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/* We'd normally divide by 840, but dividing by 1024 is close enough
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for what we're going to do with this. */
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*var_out_1st >>= 10;
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*var_out_2nd >>= 10;
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*out_dir_1st_8x8 = best_dir[0];
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*out_dir_2nd_8x8 = best_dir[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
void cdef_copy_rect8_8bit_to_16bit_avx2(uint16_t *dst, int dstride,
|
||
|
|
const uint8_t *src, int sstride,
|
||
|
|
int width, int height) {
|
||
|
|
int j = 0;
|
||
|
|
int remaining_width = width;
|
||
|
|
assert(height % 2 == 0);
|
||
|
|
assert(height > 0);
|
||
|
|
assert(width > 0);
|
||
|
|
|
||
|
|
// Process multiple 32 pixels at a time.
|
||
|
|
if (remaining_width > 31) {
|
||
|
|
int i = 0;
|
||
|
|
do {
|
||
|
|
j = 0;
|
||
|
|
do {
|
||
|
|
__m128i row00 =
|
||
|
|
_mm_loadu_si128((const __m128i *)&src[(i + 0) * sstride + (j + 0)]);
|
||
|
|
__m128i row01 = _mm_loadu_si128(
|
||
|
|
(const __m128i *)&src[(i + 0) * sstride + (j + 16)]);
|
||
|
|
__m128i row10 =
|
||
|
|
_mm_loadu_si128((const __m128i *)&src[(i + 1) * sstride + (j + 0)]);
|
||
|
|
__m128i row11 = _mm_loadu_si128(
|
||
|
|
(const __m128i *)&src[(i + 1) * sstride + (j + 16)]);
|
||
|
|
_mm256_storeu_si256((__m256i *)&dst[(i + 0) * dstride + (j + 0)],
|
||
|
|
_mm256_cvtepu8_epi16(row00));
|
||
|
|
_mm256_storeu_si256((__m256i *)&dst[(i + 0) * dstride + (j + 16)],
|
||
|
|
_mm256_cvtepu8_epi16(row01));
|
||
|
|
_mm256_storeu_si256((__m256i *)&dst[(i + 1) * dstride + (j + 0)],
|
||
|
|
_mm256_cvtepu8_epi16(row10));
|
||
|
|
_mm256_storeu_si256((__m256i *)&dst[(i + 1) * dstride + (j + 16)],
|
||
|
|
_mm256_cvtepu8_epi16(row11));
|
||
|
|
j += 32;
|
||
|
|
} while (j <= width - 32);
|
||
|
|
i += 2;
|
||
|
|
} while (i < height);
|
||
|
|
remaining_width = width & 31;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Process 16 pixels at a time.
|
||
|
|
if (remaining_width > 15) {
|
||
|
|
int i = 0;
|
||
|
|
do {
|
||
|
|
__m128i row0 =
|
||
|
|
_mm_loadu_si128((const __m128i *)&src[(i + 0) * sstride + j]);
|
||
|
|
__m128i row1 =
|
||
|
|
_mm_loadu_si128((const __m128i *)&src[(i + 1) * sstride + j]);
|
||
|
|
_mm256_storeu_si256((__m256i *)&dst[(i + 0) * dstride + j],
|
||
|
|
_mm256_cvtepu8_epi16(row0));
|
||
|
|
_mm256_storeu_si256((__m256i *)&dst[(i + 1) * dstride + j],
|
||
|
|
_mm256_cvtepu8_epi16(row1));
|
||
|
|
i += 2;
|
||
|
|
} while (i < height);
|
||
|
|
remaining_width = width & 15;
|
||
|
|
j += 16;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Process 8 pixels at a time.
|
||
|
|
if (remaining_width > 7) {
|
||
|
|
int i = 0;
|
||
|
|
do {
|
||
|
|
__m128i row0 =
|
||
|
|
_mm_loadl_epi64((const __m128i *)&src[(i + 0) * sstride + j]);
|
||
|
|
__m128i row1 =
|
||
|
|
_mm_loadl_epi64((const __m128i *)&src[(i + 1) * sstride + j]);
|
||
|
|
_mm_storeu_si128((__m128i *)&dst[(i + 0) * dstride + j],
|
||
|
|
_mm_unpacklo_epi8(row0, _mm_setzero_si128()));
|
||
|
|
_mm_storeu_si128((__m128i *)&dst[(i + 1) * dstride + j],
|
||
|
|
_mm_unpacklo_epi8(row1, _mm_setzero_si128()));
|
||
|
|
i += 2;
|
||
|
|
} while (i < height);
|
||
|
|
remaining_width = width & 7;
|
||
|
|
j += 8;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Process 4 pixels at a time.
|
||
|
|
if (remaining_width > 3) {
|
||
|
|
int i = 0;
|
||
|
|
do {
|
||
|
|
__m128i row0 =
|
||
|
|
_mm_cvtsi32_si128(*((const int32_t *)&src[(i + 0) * sstride + j]));
|
||
|
|
__m128i row1 =
|
||
|
|
_mm_cvtsi32_si128(*((const int32_t *)&src[(i + 1) * sstride + j]));
|
||
|
|
_mm_storel_epi64((__m128i *)&dst[(i + 0) * dstride + j],
|
||
|
|
_mm_unpacklo_epi8(row0, _mm_setzero_si128()));
|
||
|
|
_mm_storel_epi64((__m128i *)&dst[(i + 1) * dstride + j],
|
||
|
|
_mm_unpacklo_epi8(row1, _mm_setzero_si128()));
|
||
|
|
i += 2;
|
||
|
|
} while (i < height);
|
||
|
|
remaining_width = width & 3;
|
||
|
|
j += 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Process the remaining pixels.
|
||
|
|
if (remaining_width) {
|
||
|
|
for (int i = 0; i < height; i++) {
|
||
|
|
for (int k = j; k < width; k++) {
|
||
|
|
dst[i * dstride + k] = src[i * sstride + k];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|