/*
* Copyright (c) 2019, 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 <arm_neon.h>
#include <assert.h>
#include "config/aom_config.h"
#include "config/av1_rtcd.h"
#include "aom_dsp/aom_dsp_common.h"
#include "aom_dsp/arm/mem_neon.h"
#include "aom_dsp/arm/sum_neon.h"
int64_t av1_block_error_neon(
const tran_low_t *coeff,
const tran_low_t *dqcoeff,
intptr_t block_size, int64_t *ssz) {
uint64x2_t err_u64 = vdupq_n_u64(0);
int64x2_t ssz_s64 = vdupq_n_s64(0);
assert(block_size >= 16);
assert((block_size % 16) == 0);
do {
const int16x8_t c0 = load_tran_low_to_s16q(coeff);
const int16x8_t c1 = load_tran_low_to_s16q(coeff + 8);
const int16x8_t d0 = load_tran_low_to_s16q(dqcoeff);
const int16x8_t d1 = load_tran_low_to_s16q(dqcoeff + 8);
const uint16x8_t diff0 = vreinterpretq_u16_s16(vabdq_s16(c0, d0));
const uint16x8_t diff1 = vreinterpretq_u16_s16(vabdq_s16(c1, d1));
// By operating on unsigned integers we can store up to 4 squared diff in a
// 32-bit element before having to widen to 64 bits.
uint32x4_t err = vmull_u16(vget_low_u16(diff0), vget_low_u16(diff0));
err = vmlal_u16(err, vget_high_u16(diff0), vget_high_u16(diff0));
err = vmlal_u16(err, vget_low_u16(diff1), vget_low_u16(diff1));
err = vmlal_u16(err, vget_high_u16(diff1), vget_high_u16(diff1));
err_u64 = vpadalq_u32(err_u64, err);
// We can't do the same here as we're operating on signed integers, so we
// can only accumulate 2 squares.
int32x4_t ssz0 = vmull_s16(vget_low_s16(c0), vget_low_s16(c0));
ssz0 = vmlal_s16(ssz0, vget_high_s16(c0), vget_high_s16(c0));
ssz_s64 = vpadalq_s32(ssz_s64, ssz0);
int32x4_t ssz1 = vmull_s16(vget_low_s16(c1), vget_low_s16(c1));
ssz1 = vmlal_s16(ssz1, vget_high_s16(c1), vget_high_s16(c1));
ssz_s64 = vpadalq_s32(ssz_s64, ssz1);
coeff += 16;
dqcoeff += 16;
block_size -= 16;
}
while (block_size != 0);
*ssz = horizontal_add_s64x2(ssz_s64);
return (int64_t)horizontal_add_u64x2(err_u64);
}
int64_t av1_block_error_lp_neon(
const int16_t *coeff,
const int16_t *dqcoeff,
intptr_t block_size) {
uint64x2_t err_u64 = vdupq_n_u64(0);
assert(block_size >= 16);
assert((block_size % 16) == 0);
do {
const int16x8_t c0 = vld1q_s16(coeff);
const int16x8_t c1 = vld1q_s16(coeff + 8);
const int16x8_t d0 = vld1q_s16(dqcoeff);
const int16x8_t d1 = vld1q_s16(dqcoeff + 8);
const uint16x8_t diff0 = vreinterpretq_u16_s16(vabdq_s16(c0, d0));
const uint16x8_t diff1 = vreinterpretq_u16_s16(vabdq_s16(c1, d1));
// By operating on unsigned integers we can store up to 4 squared diff in a
// 32-bit element before having to widen to 64 bits.
uint32x4_t err = vmull_u16(vget_low_u16(diff0), vget_low_u16(diff0));
err = vmlal_u16(err, vget_high_u16(diff0), vget_high_u16(diff0));
err = vmlal_u16(err, vget_low_u16(diff1), vget_low_u16(diff1));
err = vmlal_u16(err, vget_high_u16(diff1), vget_high_u16(diff1));
err_u64 = vpadalq_u32(err_u64, err);
coeff += 16;
dqcoeff += 16;
block_size -= 16;
}
while (block_size != 0);
return (int64_t)horizontal_add_u64x2(err_u64);
}
