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/*
* Copyright (c) 2021, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 3-Clause Clear License
* and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
* License was not distributed with this source code in the LICENSE file, you
* can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. 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
* aomedia.org/license/patent-license/.
*/
#include <emmintrin.h>
#include "aom_dsp/x86/synonyms.h"
#include "av1/common/warped_motion.h"
#include "config/av1_rtcd.h"
int64_t av1_calc_frame_error_sse2(const uint8_t *const ref, int ref_stride,
const uint8_t *const dst, int p_width,
int p_height, int dst_stride) {
int64_t sum_error = 0;
int i, j;
__m128i row_error, col_error;
__m128i zero = _mm_set1_epi16(0);
__m128i dup_255 = _mm_set1_epi16(255);
col_error = zero;
for (i = 0; i < (p_height); i++) {
row_error = zero;
for (j = 0; j < (p_width / 16); j++) {
__m128i ref_8 =
_mm_load_si128((__m128i *)(ref + (j * 16) + (i * ref_stride)));
__m128i dst_8 =
_mm_load_si128((__m128i *)(dst + (j * 16) + (i * dst_stride)));
__m128i ref_16_lo = _mm_unpacklo_epi8(ref_8, zero);
__m128i ref_16_hi = _mm_unpackhi_epi8(ref_8, zero);
__m128i dst_16_lo = _mm_unpacklo_epi8(dst_8, zero);
__m128i dst_16_hi = _mm_unpackhi_epi8(dst_8, zero);
__m128i diff_1 =
_mm_add_epi16(_mm_sub_epi16(dst_16_lo, ref_16_lo), dup_255);
__m128i diff_2 =
_mm_add_epi16(_mm_sub_epi16(dst_16_hi, ref_16_hi), dup_255);
__m128i error_1_lo =
_mm_set_epi32(error_measure_lut[_mm_extract_epi16(diff_1, 3)],
error_measure_lut[_mm_extract_epi16(diff_1, 2)],
error_measure_lut[_mm_extract_epi16(diff_1, 1)],
error_measure_lut[_mm_extract_epi16(diff_1, 0)]);
__m128i error_1_hi =
_mm_set_epi32(error_measure_lut[_mm_extract_epi16(diff_1, 7)],
error_measure_lut[_mm_extract_epi16(diff_1, 6)],
error_measure_lut[_mm_extract_epi16(diff_1, 5)],
error_measure_lut[_mm_extract_epi16(diff_1, 4)]);
__m128i error_2_lo =
_mm_set_epi32(error_measure_lut[_mm_extract_epi16(diff_2, 3)],
error_measure_lut[_mm_extract_epi16(diff_2, 2)],
error_measure_lut[_mm_extract_epi16(diff_2, 1)],
error_measure_lut[_mm_extract_epi16(diff_2, 0)]);
__m128i error_2_hi =
_mm_set_epi32(error_measure_lut[_mm_extract_epi16(diff_2, 7)],
error_measure_lut[_mm_extract_epi16(diff_2, 6)],
error_measure_lut[_mm_extract_epi16(diff_2, 5)],
error_measure_lut[_mm_extract_epi16(diff_2, 4)]);
__m128i error_1 = _mm_add_epi32(error_1_lo, error_1_hi);
__m128i error_2 = _mm_add_epi32(error_2_lo, error_2_hi);
__m128i error_1_2 = _mm_add_epi32(error_1, error_2);
row_error = _mm_add_epi32(row_error, error_1_2);
}
__m128i col_error_lo = _mm_unpacklo_epi32(row_error, zero);
__m128i col_error_hi = _mm_unpackhi_epi32(row_error, zero);
__m128i col_error_temp = _mm_add_epi64(col_error_lo, col_error_hi);
col_error = _mm_add_epi64(col_error, col_error_temp);
// Error summation for remaining width, which is not multiple of 16
if (p_width & 0xf) {
for (int l = j * 16; l < p_width; ++l) {
sum_error += (int64_t)error_measure(dst[l + i * dst_stride] -
ref[l + i * ref_stride]);
}
}
}
int64_t sum_error_d_0, sum_error_d_1;
xx_storel_64(&sum_error_d_0, col_error);
xx_storel_64(&sum_error_d_1, _mm_srli_si128(col_error, 8));
sum_error = (sum_error + sum_error_d_0 + sum_error_d_1);
return sum_error;
}