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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. 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 www.aomedia.org/license/patent.
*/
#include <emmintrin.h>
#include <xmmintrin.h>
#include "config/av1_rtcd.h"
#include "aom/aom_integer.h"
static INLINE void read_coeff(const tran_low_t *coeff, intptr_t offset,
__m128i *c0, __m128i *c1) {
const tran_low_t *addr = coeff + offset;
if (sizeof(tran_low_t) == 4) {
const __m128i x0 = _mm_load_si128((const __m128i *)addr);
const __m128i x1 = _mm_load_si128((const __m128i *)addr + 1);
const __m128i x2 = _mm_load_si128((const __m128i *)addr + 2);
const __m128i x3 = _mm_load_si128((const __m128i *)addr + 3);
*c0 = _mm_packs_epi32(x0, x1);
*c1 = _mm_packs_epi32(x2, x3);
} else {
*c0 = _mm_load_si128((const __m128i *)addr);
*c1 = _mm_load_si128((const __m128i *)addr + 1);
}
}
static INLINE void write_qcoeff(const __m128i *qc0, const __m128i *qc1,
tran_low_t *qcoeff, intptr_t offset) {
tran_low_t *addr = qcoeff + offset;
if (sizeof(tran_low_t) == 4) {
const __m128i zero = _mm_setzero_si128();
__m128i sign_bits = _mm_cmplt_epi16(*qc0, zero);
__m128i y0 = _mm_unpacklo_epi16(*qc0, sign_bits);
__m128i y1 = _mm_unpackhi_epi16(*qc0, sign_bits);
_mm_store_si128((__m128i *)addr, y0);
_mm_store_si128((__m128i *)addr + 1, y1);
sign_bits = _mm_cmplt_epi16(*qc1, zero);
y0 = _mm_unpacklo_epi16(*qc1, sign_bits);
y1 = _mm_unpackhi_epi16(*qc1, sign_bits);
_mm_store_si128((__m128i *)addr + 2, y0);
_mm_store_si128((__m128i *)addr + 3, y1);
} else {
_mm_store_si128((__m128i *)addr, *qc0);
_mm_store_si128((__m128i *)addr + 1, *qc1);
}
}
static INLINE void write_zero(tran_low_t *qcoeff, intptr_t offset) {
const __m128i zero = _mm_setzero_si128();
tran_low_t *addr = qcoeff + offset;
if (sizeof(tran_low_t) == 4) {
_mm_store_si128((__m128i *)addr, zero);
_mm_store_si128((__m128i *)addr + 1, zero);
_mm_store_si128((__m128i *)addr + 2, zero);
_mm_store_si128((__m128i *)addr + 3, zero);
} else {
_mm_store_si128((__m128i *)addr, zero);
_mm_store_si128((__m128i *)addr + 1, zero);
}
}
static INLINE void quantize(const int16_t *iscan_ptr,
const tran_low_t *coeff_ptr, intptr_t n_coeffs,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
const __m128i *round0, const __m128i *round1,
const __m128i *quant0, const __m128i *quant1,
const __m128i *dequant0, const __m128i *dequant1,
const __m128i *thr0, const __m128i *thr1,
__m128i *eob) {
__m128i coeff0, coeff1;
// Do DC and first 15 AC
read_coeff(coeff_ptr, n_coeffs, &coeff0, &coeff1);
// Poor man's sign extract
const __m128i coeff0_sign = _mm_srai_epi16(coeff0, 15);
const __m128i coeff1_sign = _mm_srai_epi16(coeff1, 15);
__m128i qcoeff0 = _mm_xor_si128(coeff0, coeff0_sign);
__m128i qcoeff1 = _mm_xor_si128(coeff1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
const __m128i mask0 = _mm_or_si128(_mm_cmpgt_epi16(qcoeff0, *thr0),
_mm_cmpeq_epi16(qcoeff0, *thr0));
const __m128i mask1 = _mm_or_si128(_mm_cmpgt_epi16(qcoeff1, *thr1),
_mm_cmpeq_epi16(qcoeff1, *thr1));
const int16_t nzflag = _mm_movemask_epi8(mask0) | _mm_movemask_epi8(mask1);
if (nzflag) {
qcoeff0 = _mm_adds_epi16(qcoeff0, *round0);
qcoeff1 = _mm_adds_epi16(qcoeff1, *round1);
const __m128i qtmp0 = _mm_mulhi_epi16(qcoeff0, *quant0);
const __m128i qtmp1 = _mm_mulhi_epi16(qcoeff1, *quant1);
// Reinsert signs
qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
write_qcoeff(&qcoeff0, &qcoeff1, qcoeff_ptr, n_coeffs);
coeff0 = _mm_mullo_epi16(qcoeff0, *dequant0);
coeff1 = _mm_mullo_epi16(qcoeff1, *dequant1);
write_qcoeff(&coeff0, &coeff1, dqcoeff_ptr, n_coeffs);
const __m128i zero = _mm_setzero_si128();
// Scan for eob
const __m128i zero_coeff0 = _mm_cmpeq_epi16(coeff0, zero);
const __m128i zero_coeff1 = _mm_cmpeq_epi16(coeff1, zero);
const __m128i nzero_coeff0 = _mm_cmpeq_epi16(zero_coeff0, zero);
const __m128i nzero_coeff1 = _mm_cmpeq_epi16(zero_coeff1, zero);
const __m128i iscan0 =
_mm_load_si128((const __m128i *)(iscan_ptr + n_coeffs));
const __m128i iscan1 =
_mm_load_si128((const __m128i *)(iscan_ptr + n_coeffs) + 1);
// Add one to convert from indices to counts
const __m128i iscan0_nz = _mm_sub_epi16(iscan0, nzero_coeff0);
const __m128i iscan1_nz = _mm_sub_epi16(iscan1, nzero_coeff1);
const __m128i eob0 = _mm_and_si128(iscan0_nz, nzero_coeff0);
const __m128i eob1 = _mm_and_si128(iscan1_nz, nzero_coeff1);
const __m128i eob2 = _mm_max_epi16(eob0, eob1);
*eob = _mm_max_epi16(*eob, eob2);
} else {
write_zero(qcoeff_ptr, n_coeffs);
write_zero(dqcoeff_ptr, n_coeffs);
}
}
void av1_quantize_fp_sse2(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
const int16_t *zbin_ptr, const int16_t *round_ptr,
const int16_t *quant_ptr,
const int16_t *quant_shift_ptr,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
const int16_t *dequant_ptr, uint16_t *eob_ptr,
const int16_t *scan_ptr, const int16_t *iscan_ptr) {
(void)scan_ptr;
(void)zbin_ptr;
(void)quant_shift_ptr;
coeff_ptr += n_coeffs;
iscan_ptr += n_coeffs;
qcoeff_ptr += n_coeffs;
dqcoeff_ptr += n_coeffs;
n_coeffs = -n_coeffs;
const __m128i round0 = _mm_load_si128((const __m128i *)round_ptr);
const __m128i round1 = _mm_unpackhi_epi64(round0, round0);
const __m128i quant0 = _mm_load_si128((const __m128i *)quant_ptr);
const __m128i quant1 = _mm_unpackhi_epi64(quant0, quant0);
const __m128i dequant0 = _mm_load_si128((const __m128i *)dequant_ptr);
const __m128i dequant1 = _mm_unpackhi_epi64(dequant0, dequant0);
const __m128i thr0 = _mm_srai_epi16(dequant0, 1);
const __m128i thr1 = _mm_srai_epi16(dequant1, 1);
__m128i eob = _mm_setzero_si128();
quantize(iscan_ptr, coeff_ptr, n_coeffs, qcoeff_ptr, dqcoeff_ptr, &round0,
&round1, &quant0, &quant1, &dequant0, &dequant1, &thr0, &thr1, &eob);
n_coeffs += 8 * 2;
// AC only loop
while (n_coeffs < 0) {
quantize(iscan_ptr, coeff_ptr, n_coeffs, qcoeff_ptr, dqcoeff_ptr, &round1,
&round1, &quant1, &quant1, &dequant1, &dequant1, &thr1, &thr1,
&eob);
n_coeffs += 8 * 2;
}
// Accumulate EOB
{
__m128i eob_shuffled;
eob_shuffled = _mm_shuffle_epi32(eob, 0xe);
eob = _mm_max_epi16(eob, eob_shuffled);
eob_shuffled = _mm_shufflelo_epi16(eob, 0xe);
eob = _mm_max_epi16(eob, eob_shuffled);
eob_shuffled = _mm_shufflelo_epi16(eob, 0x1);
eob = _mm_max_epi16(eob, eob_shuffled);
*eob_ptr = _mm_extract_epi16(eob, 1);
}
}
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