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/*
* Copyright (c) 2022, 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 "config/aom_config.h"
#include "config/aom_dsp_rtcd.h"
#include "aom_dsp/variance.h"
#include "aom_dsp/aom_filter.h"
#include "aom_dsp/arm/sum_neon.h"
typedef void (*high_variance_fn_t)(const uint16_t *src, int src_stride,
const uint16_t *ref, int ref_stride,
uint32_t *sse, int *sum);
void aom_highbd_calc16x16var_neon(const uint16_t *src, int src_stride,
const uint16_t *ref, int ref_stride,
uint32_t *sse, int *sum) {
int i, j;
int16x8_t v_sum = vdupq_n_s16(0);
int32x4_t v_sse_lo = vdupq_n_s32(0);
int32x4_t v_sse_hi = vdupq_n_s32(0);
for (i = 0; i < 16; ++i) {
for (j = 0; j < 16; j += 8) {
const uint16x8_t v_a = vld1q_u16(&src[j]);
const uint16x8_t v_b = vld1q_u16(&ref[j]);
const int16x8_t sv_diff = vreinterpretq_s16_u16(vsubq_u16(v_a, v_b));
v_sum = vaddq_s16(v_sum, sv_diff);
v_sse_lo =
vmlal_s16(v_sse_lo, vget_low_s16(sv_diff), vget_low_s16(sv_diff));
v_sse_hi =
vmlal_s16(v_sse_hi, vget_high_s16(sv_diff), vget_high_s16(sv_diff));
}
src += src_stride;
ref += ref_stride;
}
*sum = horizontal_add_s16x8(v_sum);
*sse = (unsigned int)horizontal_add_s32x4(vaddq_s32(v_sse_lo, v_sse_hi));
}
void aom_highbd_calc8x8var_neon(const uint16_t *src, int src_stride,
const uint16_t *ref, int ref_stride,
uint32_t *sse, int *sum) {
int i;
int16x8_t v_sum = vdupq_n_s16(0);
int32x4_t v_sse_lo = vdupq_n_s32(0);
int32x4_t v_sse_hi = vdupq_n_s32(0);
for (i = 0; i < 8; ++i) {
const uint16x8_t v_a = vld1q_u16(&src[0]);
const uint16x8_t v_b = vld1q_u16(&ref[0]);
const int16x8_t sv_diff = vreinterpretq_s16_u16(vsubq_u16(v_a, v_b));
v_sum = vaddq_s16(v_sum, sv_diff);
v_sse_lo =
vmlal_s16(v_sse_lo, vget_low_s16(sv_diff), vget_low_s16(sv_diff));
v_sse_hi =
vmlal_s16(v_sse_hi, vget_high_s16(sv_diff), vget_high_s16(sv_diff));
src += src_stride;
ref += ref_stride;
}
*sum = horizontal_add_s16x8(v_sum);
*sse = (unsigned int)horizontal_add_s32x4(vaddq_s32(v_sse_lo, v_sse_hi));
}
void aom_highbd_calc4x4var_neon(const uint16_t *src, int src_stride,
const uint16_t *ref, int ref_stride,
uint32_t *sse, int *sum) {
int i;
int16x8_t v_sum = vdupq_n_s16(0);
int32x4_t v_sse_lo = vdupq_n_s32(0);
int32x4_t v_sse_hi = vdupq_n_s32(0);
for (i = 0; i < 4; i += 2) {
const uint16x4_t v_a_r0 = vld1_u16(&src[0]);
const uint16x4_t v_b_r0 = vld1_u16(&ref[0]);
const uint16x4_t v_a_r1 = vld1_u16(&src[src_stride]);
const uint16x4_t v_b_r1 = vld1_u16(&ref[ref_stride]);
const uint16x8_t v_a = vcombine_u16(v_a_r0, v_a_r1);
const uint16x8_t v_b = vcombine_u16(v_b_r0, v_b_r1);
const int16x8_t sv_diff = vreinterpretq_s16_u16(vsubq_u16(v_a, v_b));
v_sum = vaddq_s16(v_sum, sv_diff);
v_sse_lo =
vmlal_s16(v_sse_lo, vget_low_s16(sv_diff), vget_low_s16(sv_diff));
v_sse_hi =
vmlal_s16(v_sse_hi, vget_high_s16(sv_diff), vget_high_s16(sv_diff));
src += src_stride << 1;
ref += ref_stride << 1;
}
*sum = horizontal_add_s16x8(v_sum);
*sse = (unsigned int)horizontal_add_s32x4(vaddq_s32(v_sse_lo, v_sse_hi));
}
static void highbd_10_variance_neon(const uint16_t *src, int src_stride,
const uint16_t *ref, int ref_stride, int w,
int h, uint32_t *sse, int *sum,
high_variance_fn_t var_fn, int block_size) {
int i, j;
uint64_t sse_long = 0;
int32_t sum_long = 0;
for (i = 0; i < h; i += block_size) {
for (j = 0; j < w; j += block_size) {
unsigned int sse0;
int sum0;
var_fn(src + src_stride * i + j, src_stride, ref + ref_stride * i + j,
ref_stride, &sse0, &sum0);
sse_long += sse0;
sum_long += sum0;
}
}
*sum = ROUND_POWER_OF_TWO(sum_long, 2);
*sse = (uint32_t)ROUND_POWER_OF_TWO(sse_long, 4);
}
#define VAR_FN(w, h, block_size, shift) \
uint32_t aom_highbd_10_variance##w##x##h##_neon( \
const uint8_t *src8, int src_stride, const uint8_t *ref8, \
int ref_stride, uint32_t *sse) { \
int sum; \
int64_t var; \
uint16_t *src = CONVERT_TO_SHORTPTR(src8); \
uint16_t *ref = CONVERT_TO_SHORTPTR(ref8); \
highbd_10_variance_neon( \
src, src_stride, ref, ref_stride, w, h, sse, &sum, \
aom_highbd_calc##block_size##x##block_size##var_neon, block_size); \
var = (int64_t)(*sse) - (((int64_t)sum * sum) >> shift); \
return (var >= 0) ? (uint32_t)var : 0; \
}
VAR_FN(128, 128, 16, 14)
VAR_FN(128, 64, 16, 13)
VAR_FN(64, 128, 16, 13)
VAR_FN(64, 64, 16, 12)
VAR_FN(64, 32, 16, 11)
VAR_FN(32, 64, 16, 11)
VAR_FN(32, 32, 16, 10)
VAR_FN(32, 16, 16, 9)
VAR_FN(16, 32, 16, 9)
VAR_FN(16, 16, 16, 8)
VAR_FN(16, 8, 8, 7)
VAR_FN(8, 16, 8, 7)
VAR_FN(8, 8, 8, 6)
VAR_FN(16, 4, 4, 6)
VAR_FN(4, 16, 4, 6)
VAR_FN(8, 4, 4, 5)
VAR_FN(4, 8, 4, 5)
VAR_FN(4, 4, 4, 4)
#if !CONFIG_REALTIME_ONLY
VAR_FN(64, 16, 16, 10)
VAR_FN(16, 64, 16, 10)
VAR_FN(8, 32, 8, 8)
VAR_FN(32, 8, 8, 8)
#endif // !CONFIG_REALTIME_ONLY
#undef VAR_FN