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/*
* 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"
#if defined(__aarch64__) && defined(__ARM_FEATURE_DOTPROD)
static INLINE int32x4_t convolve8_4_sdot_partial(const int8x16_t samples_lo,
const int8x16_t samples_hi,
const int32x4_t correction,
const int8x8_t filters) {
/* Sample range-clamping and permutation are performed by the caller. */
int32x4_t sum;
/* Accumulate dot product into 'correction' to account for range clamp. */
sum = vdotq_lane_s32(correction, samples_lo, filters, 0);
sum = vdotq_lane_s32(sum, samples_hi, filters, 1);
/* Narrowing and packing is performed by the caller. */
return sum;
}
static INLINE int32x4_t convolve8_4_sdot(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_sdot_partial(const int8x16_t samples0_lo,
const int8x16_t samples0_hi,
const int8x16_t samples1_lo,
const int8x16_t samples1_hi,
const int32x4_t correction,
const int8x8_t filters) {
/* Sample range-clamping and permutation are performed by the caller. */
int32x4_t sum0, sum1;
int16x8_t sum;
/* Accumulate dot product into 'correction' to account for range clamp. */
/* First 4 output values. */
sum0 = vdotq_lane_s32(correction, samples0_lo, filters, 0);
sum0 = vdotq_lane_s32(sum0, samples0_hi, filters, 1);
/* Second 4 output values. */
sum1 = vdotq_lane_s32(correction, samples1_lo, filters, 0);
sum1 = vdotq_lane_s32(sum1, samples1_hi, filters, 1);
/* Narrow and re-pack. */
sum = vcombine_s16(vqmovn_s32(sum0), vqmovn_s32(sum1));
return vqrshrun_n_s16(sum, 7);
}
static INLINE uint8x8_t convolve8_8_sdot(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 // defined(__aarch64__) && defined(__ARM_FEATURE_DOTPROD)
#if defined(__aarch64__) && defined(__ARM_FEATURE_MATMUL_INT8)
static INLINE int32x4_t convolve8_4_usdot_partial(const uint8x16_t samples_lo,
const uint8x16_t samples_hi,
const int8x8_t filters) {
/* Sample permutation is performed by the caller. */
int32x4_t sum;
sum = vusdotq_lane_s32(vdupq_n_s32(0), samples_lo, filters, 0);
sum = vusdotq_lane_s32(sum, samples_hi, filters, 1);
/* Narrowing and packing is performed by the caller. */
return sum;
}
static INLINE int32x4_t convolve8_4_usdot(uint8x16_t samples,
const int8x8_t filters,
const uint8x16x2_t permute_tbl) {
uint8x16_t permuted_samples[2];
int32x4_t sum;
/* 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_u8(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_u8(samples, permute_tbl.val[1]);
/* Accumulate dot product into 'correction' to account for range clamp. */
sum = vusdotq_lane_s32(vdupq_n_s32(0), permuted_samples[0], filters, 0);
sum = vusdotq_lane_s32(sum, permuted_samples[1], filters, 1);
/* Narrowing and packing is performed by the caller. */
return sum;
}
static INLINE uint8x8_t convolve8_8_usdot_partial(const uint8x16_t samples0_lo,
const uint8x16_t samples0_hi,
const uint8x16_t samples1_lo,
const uint8x16_t samples1_hi,
const int8x8_t filters) {
/* Sample permutation is performed by the caller. */
int32x4_t sum0, sum1;
int16x8_t sum;
/* First 4 output values. */
sum0 = vusdotq_lane_s32(vdupq_n_s32(0), samples0_lo, filters, 0);
sum0 = vusdotq_lane_s32(sum0, samples0_hi, filters, 1);
/* Second 4 output values. */
sum1 = vusdotq_lane_s32(vdupq_n_s32(0), samples1_lo, filters, 0);
sum1 = vusdotq_lane_s32(sum1, samples1_hi, filters, 1);
/* Narrow and re-pack. */
sum = vcombine_s16(vqmovn_s32(sum0), vqmovn_s32(sum1));
return vqrshrun_n_s16(sum, 7);
}
static INLINE uint8x8_t convolve8_8_usdot(uint8x16_t samples,
const int8x8_t filters,
const uint8x16x3_t permute_tbl) {
uint8x16_t permuted_samples[3];
int32x4_t sum0, sum1;
int16x8_t sum;
/* 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_u8(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_u8(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_u8(samples, permute_tbl.val[2]);
/* First 4 output values. */
sum0 = vusdotq_lane_s32(vdupq_n_s32(0), permuted_samples[0], filters, 0);
sum0 = vusdotq_lane_s32(sum0, permuted_samples[1], filters, 1);
/* Second 4 output values. */
sum1 = vusdotq_lane_s32(vdupq_n_s32(0), permuted_samples[1], filters, 0);
sum1 = vusdotq_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 // defined(__aarch64__) && defined(__ARM_FEATURE_MATMUL_INT8)
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 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_lane_s16(s3, filters_lo, 3));
sum = vqadd_s16(sum, vmul_lane_s16(s4, filters_hi, 0));
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 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_lane_s16(s3, filters_lo, 3));
sum = vqaddq_s16(sum, vmulq_lane_s16(s4, filters_hi, 0));
return vqrshrun_n_s16(sum, 7);
}
static INLINE uint8x8_t scale_filter_8(const uint8x8_t *const s,
const int16x8_t filters) {
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);
}
#endif // VPX_VPX_DSP_ARM_VPX_CONVOLVE8_NEON_H_
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