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/*
* Copyright (c) 2019, Alliance for Open Media. 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 <arm_neon.h>
#include "config/aom_dsp_rtcd.h"
#include "aom/aom_integer.h"
#include "aom_dsp/arm/mem_neon.h"
#include "aom_dsp/arm/sum_neon.h"
#include "aom_dsp/arm/transpose_neon.h"
#include "aom_ports/mem.h"
#if !defined(__aarch64__)
static INLINE uint32x2_t horizontal_add_u16x8_v(const uint16x8_t a) {
const uint32x4_t b = vpaddlq_u16(a);
const uint64x2_t c = vpaddlq_u32(b);
return vadd_u32(vreinterpret_u32_u64(vget_low_u64(c)),
vreinterpret_u32_u64(vget_high_u64(c)));
}
#endif
unsigned int aom_avg_4x4_neon(const uint8_t *a, int a_stride) {
const uint8x16_t b = load_unaligned_u8q(a, a_stride);
const uint16x8_t c = vaddl_u8(vget_low_u8(b), vget_high_u8(b));
#if defined(__aarch64__)
const uint32_t d = vaddlvq_u16(c);
return (d + 8) >> 4;
#else
const uint32x2_t d = horizontal_add_u16x8_v(c);
return vget_lane_u32(vrshr_n_u32(d, 4), 0);
#endif
}
unsigned int aom_avg_8x8_neon(const uint8_t *a, int a_stride) {
uint16x8_t sum;
uint8x8_t b = vld1_u8(a);
a += a_stride;
uint8x8_t c = vld1_u8(a);
a += a_stride;
sum = vaddl_u8(b, c);
for (int i = 0; i < 6; ++i) {
const uint8x8_t e = vld1_u8(a);
a += a_stride;
sum = vaddw_u8(sum, e);
}
#if defined(__aarch64__)
const uint32_t d = vaddlvq_u16(sum);
return (d + 32) >> 6;
#else
const uint32x2_t d = horizontal_add_u16x8_v(sum);
return vget_lane_u32(vrshr_n_u32(d, 6), 0);
#endif
}
void aom_avg_8x8_quad_neon(const uint8_t *s, int p, int x16_idx, int y16_idx,
int *avg) {
for (int k = 0; k < 4; k++) {
const int x8_idx = x16_idx + ((k & 1) << 3);
const int y8_idx = y16_idx + ((k >> 1) << 3);
const uint8_t *s_tmp = s + y8_idx * p + x8_idx;
avg[k] = aom_avg_8x8_neon(s_tmp, p);
}
}
int aom_satd_lp_neon(const int16_t *coeff, int length) {
const int16x4_t zero = vdup_n_s16(0);
int32x4_t accum = vdupq_n_s32(0);
do {
const int16x8_t src0 = vld1q_s16(coeff);
const int16x8_t src8 = vld1q_s16(coeff + 8);
accum = vabal_s16(accum, vget_low_s16(src0), zero);
accum = vabal_s16(accum, vget_high_s16(src0), zero);
accum = vabal_s16(accum, vget_low_s16(src8), zero);
accum = vabal_s16(accum, vget_high_s16(src8), zero);
length -= 16;
coeff += 16;
} while (length != 0);
return horizontal_add_s32x4(accum);
}
void aom_int_pro_row_neon(int16_t *hbuf, const uint8_t *ref,
const int ref_stride, const int width,
const int height, int norm_factor) {
const uint8_t *idx = ref;
const uint16x8_t zero = vdupq_n_u16(0);
const int16x8_t neg_norm_factor = vdupq_n_s16(-norm_factor);
for (int wd = 0; wd < width; wd += 16) {
uint16x8_t vec0 = zero;
uint16x8_t vec1 = zero;
idx = ref + wd;
for (int ht = 0; ht < height; ++ht) {
const uint8x16_t tmp = vld1q_u8(idx);
idx += ref_stride;
vec0 = vaddw_u8(vec0, vget_low_u8(tmp));
vec1 = vaddw_u8(vec1, vget_high_u8(tmp));
}
const int16x8_t result0 =
vshlq_s16(vreinterpretq_s16_u16(vec0), neg_norm_factor);
const int16x8_t result1 =
vshlq_s16(vreinterpretq_s16_u16(vec1), neg_norm_factor);
vst1q_s16(hbuf + wd, result0);
vst1q_s16(hbuf + wd + 8, result1);
}
}
void aom_int_pro_col_neon(int16_t *vbuf, const uint8_t *ref,
const int ref_stride, const int width,
const int height, int norm_factor) {
for (int ht = 0; ht < height; ++ht) {
uint16x8_t sum = vdupq_n_u16(0);
for (int wd = 0; wd < width; wd += 16) {
const uint8x16_t vec = vld1q_u8(ref + wd);
sum = vaddq_u16(sum, vpaddlq_u8(vec));
}
#if defined(__aarch64__)
vbuf[ht] = ((int16_t)vaddvq_u16(sum)) >> norm_factor;
#else
const uint32x4_t a = vpaddlq_u16(sum);
const uint64x2_t b = vpaddlq_u32(a);
const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)),
vreinterpret_u32_u64(vget_high_u64(b)));
vbuf[ht] = ((int16_t)vget_lane_u32(c, 0)) >> norm_factor;
#endif
ref += ref_stride;
}
}
// coeff: 16 bits, dynamic range [-32640, 32640].
// length: value range {16, 64, 256, 1024}.
int aom_satd_neon(const tran_low_t *coeff, int length) {
const int32x4_t zero = vdupq_n_s32(0);
int32x4_t accum = zero;
do {
const int32x4_t src0 = vld1q_s32(&coeff[0]);
const int32x4_t src8 = vld1q_s32(&coeff[4]);
const int32x4_t src16 = vld1q_s32(&coeff[8]);
const int32x4_t src24 = vld1q_s32(&coeff[12]);
accum = vabaq_s32(accum, src0, zero);
accum = vabaq_s32(accum, src8, zero);
accum = vabaq_s32(accum, src16, zero);
accum = vabaq_s32(accum, src24, zero);
length -= 16;
coeff += 16;
} while (length != 0);
// satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024]
return horizontal_add_s32x4(accum);
}
int aom_vector_var_neon(const int16_t *ref, const int16_t *src, int bwl) {
int32x4_t v_mean = vdupq_n_s32(0);
int32x4_t v_sse = v_mean;
int16x8_t v_ref, v_src;
int16x4_t v_low;
int i, width = 4 << bwl;
for (i = 0; i < width; i += 8) {
v_ref = vld1q_s16(&ref[i]);
v_src = vld1q_s16(&src[i]);
const int16x8_t diff = vsubq_s16(v_ref, v_src);
// diff: dynamic range [-510, 510], 10 bits.
v_mean = vpadalq_s16(v_mean, diff);
v_low = vget_low_s16(diff);
v_sse = vmlal_s16(v_sse, v_low, v_low);
#if defined(__aarch64__)
v_sse = vmlal_high_s16(v_sse, diff, diff);
#else
const int16x4_t v_high = vget_high_s16(diff);
v_sse = vmlal_s16(v_sse, v_high, v_high);
#endif
}
const int mean = horizontal_add_s32x4(v_mean);
const int sse = horizontal_add_s32x4(v_sse);
const unsigned int mean_abs = mean >= 0 ? mean : -mean;
// (mean * mean): dynamic range 31 bits.
const int var = sse - ((mean_abs * mean_abs) >> (bwl + 2));
return var;
}
#if CONFIG_AV1_HIGHBITDEPTH
unsigned int aom_highbd_avg_4x4_neon(const uint8_t *s, int p) {
const uint16_t *src = CONVERT_TO_SHORTPTR(s);
const uint16x4_t r0 = vld1_u16(src);
src += p;
uint16x4_t r1, r2, r3;
r1 = vld1_u16(src);
src += p;
r2 = vld1_u16(src);
src += p;
r3 = vld1_u16(src);
const uint16x4_t s1 = vadd_u16(r0, r1);
const uint16x4_t s2 = vadd_u16(r2, r3);
const uint16x4_t s3 = vadd_u16(s1, s2);
#if defined(__aarch64__)
return (vaddv_u16(s3) + 8) >> 4;
#else
const uint16x4_t h1 = vpadd_u16(s3, s3);
const uint16x4_t h2 = vpadd_u16(h1, h1);
const uint16x4_t res = vrshr_n_u16(h2, 4);
return vget_lane_u16(res, 0);
#endif
}
#endif // CONFIG_AV1_HIGHBITDEPTH