ref: 870cf4356c074f7150b01c3f98cfc5d6a6a44487
dir: /vpx_dsp/x86/highbd_idct4x4_add_sse2.c/
/*
* Copyright (c) 2015 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 "./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"
#include "vpx_dsp/x86/txfm_common_sse2.h"
void vpx_highbd_idct4x4_16_add_sse2(const tran_low_t *input, uint16_t *dest,
int stride, int bd) {
tran_low_t out[4 * 4];
tran_low_t *outptr = out;
int i, j;
__m128i inptr[4];
__m128i sign_bits[2];
__m128i temp_mm, min_input, max_input;
int test;
int optimised_cols = 0;
const __m128i zero = _mm_set1_epi16(0);
const __m128i eight = _mm_set1_epi16(8);
const __m128i max = _mm_set1_epi16(12043);
const __m128i min = _mm_set1_epi16(-12043);
// Load input into __m128i
inptr[0] = _mm_loadu_si128((const __m128i *)input);
inptr[1] = _mm_loadu_si128((const __m128i *)(input + 4));
inptr[2] = _mm_loadu_si128((const __m128i *)(input + 8));
inptr[3] = _mm_loadu_si128((const __m128i *)(input + 12));
// Pack to 16 bits
inptr[0] = _mm_packs_epi32(inptr[0], inptr[1]);
inptr[1] = _mm_packs_epi32(inptr[2], inptr[3]);
max_input = _mm_max_epi16(inptr[0], inptr[1]);
min_input = _mm_min_epi16(inptr[0], inptr[1]);
max_input = _mm_cmpgt_epi16(max_input, max);
min_input = _mm_cmplt_epi16(min_input, min);
temp_mm = _mm_or_si128(max_input, min_input);
test = _mm_movemask_epi8(temp_mm);
if (!test) {
// Do the row transform
idct4_sse2(inptr);
// Check the min & max values
max_input = _mm_max_epi16(inptr[0], inptr[1]);
min_input = _mm_min_epi16(inptr[0], inptr[1]);
max_input = _mm_cmpgt_epi16(max_input, max);
min_input = _mm_cmplt_epi16(min_input, min);
temp_mm = _mm_or_si128(max_input, min_input);
test = _mm_movemask_epi8(temp_mm);
if (test) {
transpose_4x4(inptr);
sign_bits[0] = _mm_cmplt_epi16(inptr[0], zero);
sign_bits[1] = _mm_cmplt_epi16(inptr[1], zero);
inptr[3] = _mm_unpackhi_epi16(inptr[1], sign_bits[1]);
inptr[2] = _mm_unpacklo_epi16(inptr[1], sign_bits[1]);
inptr[1] = _mm_unpackhi_epi16(inptr[0], sign_bits[0]);
inptr[0] = _mm_unpacklo_epi16(inptr[0], sign_bits[0]);
_mm_storeu_si128((__m128i *)outptr, inptr[0]);
_mm_storeu_si128((__m128i *)(outptr + 4), inptr[1]);
_mm_storeu_si128((__m128i *)(outptr + 8), inptr[2]);
_mm_storeu_si128((__m128i *)(outptr + 12), inptr[3]);
} else {
// Set to use the optimised transform for the column
optimised_cols = 1;
}
} else {
// Run the un-optimised row transform
for (i = 0; i < 4; ++i) {
vpx_highbd_idct4_c(input, outptr, bd);
input += 4;
outptr += 4;
}
}
if (optimised_cols) {
idct4_sse2(inptr);
// Final round and shift
inptr[0] = _mm_add_epi16(inptr[0], eight);
inptr[1] = _mm_add_epi16(inptr[1], eight);
inptr[0] = _mm_srai_epi16(inptr[0], 4);
inptr[1] = _mm_srai_epi16(inptr[1], 4);
// Reconstruction and Store
{
__m128i d0 = _mm_loadl_epi64((const __m128i *)dest);
__m128i d2 = _mm_loadl_epi64((const __m128i *)(dest + stride * 2));
d0 = _mm_unpacklo_epi64(
d0, _mm_loadl_epi64((const __m128i *)(dest + stride)));
d2 = _mm_unpacklo_epi64(
d2, _mm_loadl_epi64((const __m128i *)(dest + stride * 3)));
d0 = clamp_high_sse2(_mm_adds_epi16(d0, inptr[0]), bd);
d2 = clamp_high_sse2(_mm_adds_epi16(d2, inptr[1]), bd);
// store input0
_mm_storel_epi64((__m128i *)dest, d0);
// store input1
d0 = _mm_srli_si128(d0, 8);
_mm_storel_epi64((__m128i *)(dest + stride), d0);
// store input2
_mm_storel_epi64((__m128i *)(dest + stride * 2), d2);
// store input3
d2 = _mm_srli_si128(d2, 8);
_mm_storel_epi64((__m128i *)(dest + stride * 3), d2);
}
} else {
// Run the un-optimised column transform
tran_low_t temp_in[4], temp_out[4];
// Columns
for (i = 0; i < 4; ++i) {
for (j = 0; j < 4; ++j) temp_in[j] = out[j * 4 + i];
vpx_highbd_idct4_c(temp_in, temp_out, bd);
for (j = 0; j < 4; ++j) {
dest[j * stride + i] = highbd_clip_pixel_add(
dest[j * stride + i], ROUND_POWER_OF_TWO(temp_out[j], 4), bd);
}
}
}
}