ref: bd77931421a811a4d7469c8bd6f4e932b8f054a9
dir: /vpx_dsp/x86/highbd_idct4x4_add_sse4.c/
/*
* Copyright (c) 2017 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 <smmintrin.h>
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/x86/highbd_inv_txfm_sse2.h"
#include "vpx_dsp/x86/inv_txfm_sse2.h"
#include "vpx_dsp/x86/transpose_sse2.h"
static INLINE void extend_64bit(const __m128i in,
__m128i *const out /*out[2]*/) {
out[0] = _mm_unpacklo_epi32(in, in); // 0, 0, 1, 1
out[1] = _mm_unpackhi_epi32(in, in); // 2, 2, 3, 3
}
static INLINE void highbd_idct4(__m128i *const io) {
const __m128i cospi_p16_p16 =
_mm_setr_epi32(cospi_16_64 << 2, 0, cospi_16_64 << 2, 0);
const __m128i cospi_p08_p08 =
_mm_setr_epi32(cospi_8_64 << 2, 0, cospi_8_64 << 2, 0);
const __m128i cospi_p24_p24 =
_mm_setr_epi32(cospi_24_64 << 2, 0, cospi_24_64 << 2, 0);
__m128i temp1[4], temp2[4], step[4];
transpose_32bit_4x4(&io[0], &io[1], &io[2], &io[3]);
// stage 1
temp1[0] = _mm_add_epi32(io[0], io[2]); // input[0] + input[2]
temp2[0] = _mm_sub_epi32(io[0], io[2]); // input[0] - input[2]
extend_64bit(temp1[0], temp1);
extend_64bit(temp2[0], temp2);
temp1[0] = _mm_mul_epi32(temp1[0], cospi_p16_p16);
temp1[1] = _mm_mul_epi32(temp1[1], cospi_p16_p16);
temp2[0] = _mm_mul_epi32(temp2[0], cospi_p16_p16);
temp2[1] = _mm_mul_epi32(temp2[1], cospi_p16_p16);
temp1[0] = dct_const_round_shift_64bit(temp1[0]);
temp1[1] = dct_const_round_shift_64bit(temp1[1]);
temp2[0] = dct_const_round_shift_64bit(temp2[0]);
temp2[1] = dct_const_round_shift_64bit(temp2[1]);
step[0] = pack_4(temp1[0], temp1[1]);
step[1] = pack_4(temp2[0], temp2[1]);
extend_64bit(io[1], temp1);
extend_64bit(io[3], temp2);
temp1[2] = _mm_mul_epi32(temp1[0], cospi_p08_p08);
temp1[3] = _mm_mul_epi32(temp1[1], cospi_p08_p08);
temp1[0] = _mm_mul_epi32(temp1[0], cospi_p24_p24);
temp1[1] = _mm_mul_epi32(temp1[1], cospi_p24_p24);
temp2[2] = _mm_mul_epi32(temp2[0], cospi_p24_p24);
temp2[3] = _mm_mul_epi32(temp2[1], cospi_p24_p24);
temp2[0] = _mm_mul_epi32(temp2[0], cospi_p08_p08);
temp2[1] = _mm_mul_epi32(temp2[1], cospi_p08_p08);
temp1[0] = _mm_sub_epi64(temp1[0], temp2[0]); // [1]*cospi_24 - [3]*cospi_8
temp1[1] = _mm_sub_epi64(temp1[1], temp2[1]); // [1]*cospi_24 - [3]*cospi_8
temp2[0] = _mm_add_epi64(temp1[2], temp2[2]); // [1]*cospi_8 + [3]*cospi_24
temp2[1] = _mm_add_epi64(temp1[3], temp2[3]); // [1]*cospi_8 + [3]*cospi_24
temp1[0] = dct_const_round_shift_64bit(temp1[0]);
temp1[1] = dct_const_round_shift_64bit(temp1[1]);
temp2[0] = dct_const_round_shift_64bit(temp2[0]);
temp2[1] = dct_const_round_shift_64bit(temp2[1]);
step[2] = pack_4(temp1[0], temp1[1]);
step[3] = pack_4(temp2[0], temp2[1]);
// stage 2
io[0] = _mm_add_epi32(step[0], step[3]); // step[0] + step[3]
io[1] = _mm_add_epi32(step[1], step[2]); // step[1] + step[2]
io[2] = _mm_sub_epi32(step[1], step[2]); // step[1] - step[2]
io[3] = _mm_sub_epi32(step[0], step[3]); // step[0] - step[3]
}
void vpx_highbd_idct4x4_16_add_sse4_1(const tran_low_t *input, uint16_t *dest,
int stride, int bd) {
__m128i io[4];
io[0] = _mm_load_si128((const __m128i *)(input + 0));
io[1] = _mm_load_si128((const __m128i *)(input + 4));
io[2] = _mm_load_si128((const __m128i *)(input + 8));
io[3] = _mm_load_si128((const __m128i *)(input + 12));
if (bd == 8) {
__m128i io_short[2];
io_short[0] = _mm_packs_epi32(io[0], io[1]);
io_short[1] = _mm_packs_epi32(io[2], io[3]);
idct4_sse2(io_short);
idct4_sse2(io_short);
io_short[0] = _mm_add_epi16(io_short[0], _mm_set1_epi16(8));
io_short[1] = _mm_add_epi16(io_short[1], _mm_set1_epi16(8));
io[0] = _mm_srai_epi16(io_short[0], 4);
io[1] = _mm_srai_epi16(io_short[1], 4);
} else {
highbd_idct4(io);
highbd_idct4(io);
io[0] = wraplow_16bit(io[0], io[1], _mm_set1_epi32(8));
io[1] = wraplow_16bit(io[2], io[3], _mm_set1_epi32(8));
}
recon_and_store_4(dest, io, stride, bd);
}