ref: c1f77a3689a6cf5e95e1c1ae35d76f4f171f5ef3
dir: /vpx_dsp/arm/vpx_convolve8_neon.h/
/*
* Copyright (c) 2014 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.
*/
#ifndef VPX_VPX_DSP_ARM_VPX_CONVOLVE8_NEON_H_
#define VPX_VPX_DSP_ARM_VPX_CONVOLVE8_NEON_H_
#include <arm_neon.h>
#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
static INLINE void load_u8_8x4(const uint8_t *s, const ptrdiff_t p,
uint8x8_t *const s0, uint8x8_t *const s1,
uint8x8_t *const s2, uint8x8_t *const s3) {
*s0 = vld1_u8(s);
s += p;
*s1 = vld1_u8(s);
s += p;
*s2 = vld1_u8(s);
s += p;
*s3 = vld1_u8(s);
}
static INLINE void load_u8_8x8(const uint8_t *s, const ptrdiff_t p,
uint8x8_t *const s0, uint8x8_t *const s1,
uint8x8_t *const s2, uint8x8_t *const s3,
uint8x8_t *const s4, uint8x8_t *const s5,
uint8x8_t *const s6, uint8x8_t *const s7) {
*s0 = vld1_u8(s);
s += p;
*s1 = vld1_u8(s);
s += p;
*s2 = vld1_u8(s);
s += p;
*s3 = vld1_u8(s);
s += p;
*s4 = vld1_u8(s);
s += p;
*s5 = vld1_u8(s);
s += p;
*s6 = vld1_u8(s);
s += p;
*s7 = vld1_u8(s);
}
static INLINE void load_u8_16x8(const uint8_t *s, const ptrdiff_t p,
uint8x16_t *const s0, uint8x16_t *const s1,
uint8x16_t *const s2, uint8x16_t *const s3,
uint8x16_t *const s4, uint8x16_t *const s5,
uint8x16_t *const s6, uint8x16_t *const s7) {
*s0 = vld1q_u8(s);
s += p;
*s1 = vld1q_u8(s);
s += p;
*s2 = vld1q_u8(s);
s += p;
*s3 = vld1q_u8(s);
s += p;
*s4 = vld1q_u8(s);
s += p;
*s5 = vld1q_u8(s);
s += p;
*s6 = vld1q_u8(s);
s += p;
*s7 = vld1q_u8(s);
}
#if defined(__aarch64__) && defined(__ARM_FEATURE_DOTPROD) && \
(__ARM_FEATURE_DOTPROD == 1)
static INLINE int32x4_t convolve8_4_dot(uint8x16_t samples,
const int8x8_t filters,
const int32x4_t correction,
const uint8x16_t range_limit,
const uint8x16x2_t permute_tbl) {
int8x16_t clamped_samples, permuted_samples[2];
int32x4_t sum;
/* Clamp sample range to [-128, 127] for 8-bit signed dot product. */
clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
/* Permute samples ready for dot product. */
/* { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 } */
permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
/* { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 } */
permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
/* Accumulate dot product into 'correction' to account for range clamp. */
sum = vdotq_lane_s32(correction, permuted_samples[0], filters, 0);
sum = vdotq_lane_s32(sum, permuted_samples[1], filters, 1);
/* Narrowing and packing is performed by the caller. */
return sum;
}
static INLINE uint8x8_t convolve8_8_dot(uint8x16_t samples,
const int8x8_t filters,
const int32x4_t correction,
const uint8x16_t range_limit,
const uint8x16x3_t permute_tbl) {
int8x16_t clamped_samples, permuted_samples[3];
int32x4_t sum0, sum1;
int16x8_t sum;
/* Clamp sample range to [-128, 127] for 8-bit signed dot product. */
clamped_samples = vreinterpretq_s8_u8(vsubq_u8(samples, range_limit));
/* Permute samples ready for dot product. */
/* { 0, 1, 2, 3, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6 } */
permuted_samples[0] = vqtbl1q_s8(clamped_samples, permute_tbl.val[0]);
/* { 4, 5, 6, 7, 5, 6, 7, 8, 6, 7, 8, 9, 7, 8, 9, 10 } */
permuted_samples[1] = vqtbl1q_s8(clamped_samples, permute_tbl.val[1]);
/* { 8, 9, 10, 11, 9, 10, 11, 12, 10, 11, 12, 13, 11, 12, 13, 14 } */
permuted_samples[2] = vqtbl1q_s8(clamped_samples, permute_tbl.val[2]);
/* Accumulate dot product into 'correction' to account for range clamp. */
/* First 4 output values. */
sum0 = vdotq_lane_s32(correction, permuted_samples[0], filters, 0);
sum0 = vdotq_lane_s32(sum0, permuted_samples[1], filters, 1);
/* Second 4 output values. */
sum1 = vdotq_lane_s32(correction, permuted_samples[1], filters, 0);
sum1 = vdotq_lane_s32(sum1, permuted_samples[2], filters, 1);
/* Narrow and re-pack. */
sum = vcombine_s16(vqmovn_s32(sum0), vqmovn_s32(sum1));
return vqrshrun_n_s16(sum, 7);
}
#endif
static INLINE int16x4_t convolve8_4(const int16x4_t s0, const int16x4_t s1,
const int16x4_t s2, const int16x4_t s3,
const int16x4_t s4, const int16x4_t s5,
const int16x4_t s6, const int16x4_t s7,
const int16x8_t filters,
const int16x4_t filter3,
const int16x4_t filter4) {
const int16x4_t filters_lo = vget_low_s16(filters);
const int16x4_t filters_hi = vget_high_s16(filters);
int16x4_t sum;
sum = vmul_lane_s16(s0, filters_lo, 0);
sum = vmla_lane_s16(sum, s1, filters_lo, 1);
sum = vmla_lane_s16(sum, s2, filters_lo, 2);
sum = vmla_lane_s16(sum, s5, filters_hi, 1);
sum = vmla_lane_s16(sum, s6, filters_hi, 2);
sum = vmla_lane_s16(sum, s7, filters_hi, 3);
sum = vqadd_s16(sum, vmul_s16(s3, filter3));
sum = vqadd_s16(sum, vmul_s16(s4, filter4));
return sum;
}
static INLINE uint8x8_t convolve8_8(const int16x8_t s0, const int16x8_t s1,
const int16x8_t s2, const int16x8_t s3,
const int16x8_t s4, const int16x8_t s5,
const int16x8_t s6, const int16x8_t s7,
const int16x8_t filters,
const int16x8_t filter3,
const int16x8_t filter4) {
const int16x4_t filters_lo = vget_low_s16(filters);
const int16x4_t filters_hi = vget_high_s16(filters);
int16x8_t sum;
sum = vmulq_lane_s16(s0, filters_lo, 0);
sum = vmlaq_lane_s16(sum, s1, filters_lo, 1);
sum = vmlaq_lane_s16(sum, s2, filters_lo, 2);
sum = vmlaq_lane_s16(sum, s5, filters_hi, 1);
sum = vmlaq_lane_s16(sum, s6, filters_hi, 2);
sum = vmlaq_lane_s16(sum, s7, filters_hi, 3);
sum = vqaddq_s16(sum, vmulq_s16(s3, filter3));
sum = vqaddq_s16(sum, vmulq_s16(s4, filter4));
return vqrshrun_n_s16(sum, 7);
}
static INLINE uint8x8_t scale_filter_8(const uint8x8_t *const s,
const int16x8_t filters) {
const int16x8_t filter3 = vdupq_lane_s16(vget_low_s16(filters), 3);
const int16x8_t filter4 = vdupq_lane_s16(vget_high_s16(filters), 0);
int16x8_t ss[8];
ss[0] = vreinterpretq_s16_u16(vmovl_u8(s[0]));
ss[1] = vreinterpretq_s16_u16(vmovl_u8(s[1]));
ss[2] = vreinterpretq_s16_u16(vmovl_u8(s[2]));
ss[3] = vreinterpretq_s16_u16(vmovl_u8(s[3]));
ss[4] = vreinterpretq_s16_u16(vmovl_u8(s[4]));
ss[5] = vreinterpretq_s16_u16(vmovl_u8(s[5]));
ss[6] = vreinterpretq_s16_u16(vmovl_u8(s[6]));
ss[7] = vreinterpretq_s16_u16(vmovl_u8(s[7]));
return convolve8_8(ss[0], ss[1], ss[2], ss[3], ss[4], ss[5], ss[6], ss[7],
filters, filter3, filter4);
}
#endif // VPX_VPX_DSP_ARM_VPX_CONVOLVE8_NEON_H_