blob: e8d2a057710b17f095b943e023c3f5bd10bda081 [file] [log] [blame]
* 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 <emmintrin.h>
#include "./vpx_config.h"
#include "vpx/vpx_integer.h"
#include "vpx_dsp/x86/quantize_sse2.h"
static INLINE void calculate_dqcoeff_and_store_32x32(const __m128i qcoeff,
const __m128i dequant,
const __m128i zero,
tran_low_t *dqcoeff) {
// Un-sign to bias rounding like C.
const __m128i coeff = _mm_abs_epi16(qcoeff);
const __m128i sign_0 = _mm_unpacklo_epi16(zero, qcoeff);
const __m128i sign_1 = _mm_unpackhi_epi16(zero, qcoeff);
const __m128i low = _mm_mullo_epi16(coeff, dequant);
const __m128i high = _mm_mulhi_epi16(coeff, dequant);
__m128i dqcoeff32_0 = _mm_unpacklo_epi16(low, high);
__m128i dqcoeff32_1 = _mm_unpackhi_epi16(low, high);
// "Divide" by 2.
dqcoeff32_0 = _mm_srli_epi32(dqcoeff32_0, 1);
dqcoeff32_1 = _mm_srli_epi32(dqcoeff32_1, 1);
dqcoeff32_0 = _mm_sign_epi32(dqcoeff32_0, sign_0);
dqcoeff32_1 = _mm_sign_epi32(dqcoeff32_1, sign_1);
_mm_store_si128((__m128i *)(dqcoeff), dqcoeff32_0);
_mm_store_si128((__m128i *)(dqcoeff + 4), dqcoeff32_1);
_mm_store_si128((__m128i *)(dqcoeff),
_mm_packs_epi32(dqcoeff32_0, dqcoeff32_1));