ref: 5c95fd921e0d6204f132021e8d86bde8596f107d
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.
*/
#include <arm_neon.h>
#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
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 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);
}