/*
* Copyright (c) 2018, 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.
*/
#ifndef AOM_AV1_COMMON_ARM_CONVOLVE_NEON_H_
#define AOM_AV1_COMMON_ARM_CONVOLVE_NEON_H_
#include <arm_neon.h>
#include "config/aom_config.h"
#include "aom_dsp/arm/mem_neon.h"
#include "av1/common/convolve.h"
#include "av1/common/filter.h"
static inline int32x4_t convolve12_4_2d_v(
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 int16x4_t s8,
const int16x4_t s9,
const int16x4_t s10,
const int16x4_t s11,
const int16x8_t y_filter_0_7,
const int16x4_t y_filter_8_11) {
const int16x4_t y_filter_0_3 = vget_low_s16(y_filter_0_7);
const int16x4_t y_filter_4_7 = vget_high_s16(y_filter_0_7);
int32x4_t sum = vmull_lane_s16(s0, y_filter_0_3, 0);
sum = vmlal_lane_s16(sum, s1, y_filter_0_3, 1);
sum = vmlal_lane_s16(sum, s2, y_filter_0_3, 2);
sum = vmlal_lane_s16(sum, s3, y_filter_0_3, 3);
sum = vmlal_lane_s16(sum, s4, y_filter_4_7, 0);
sum = vmlal_lane_s16(sum, s5, y_filter_4_7, 1);
sum = vmlal_lane_s16(sum, s6, y_filter_4_7, 2);
sum = vmlal_lane_s16(sum, s7, y_filter_4_7, 3);
sum = vmlal_lane_s16(sum, s8, y_filter_8_11, 0);
sum = vmlal_lane_s16(sum, s9, y_filter_8_11, 1);
sum = vmlal_lane_s16(sum, s10, y_filter_8_11, 2);
sum = vmlal_lane_s16(sum, s11, y_filter_8_11, 3);
return sum;
}
static inline uint8x8_t convolve12_8_2d_v(
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 s8,
const int16x8_t s9,
const int16x8_t s10,
const int16x8_t s11,
const int16x8_t y_filter_0_7,
const int16x4_t y_filter_8_11,
const int16x8_t sub_const) {
const int16x4_t y_filter_0_3 = vget_low_s16(y_filter_0_7);
const int16x4_t y_filter_4_7 = vget_high_s16(y_filter_0_7);
int32x4_t sum0 = vmull_lane_s16(vget_low_s16(s0), y_filter_0_3, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s1), y_filter_0_3, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s2), y_filter_0_3, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s3), y_filter_0_3, 3);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s4), y_filter_4_7, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s5), y_filter_4_7, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s6), y_filter_4_7, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s7), y_filter_4_7, 3);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s8), y_filter_8_11, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s9), y_filter_8_11, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s10), y_filter_8_11, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s11), y_filter_8_11, 3);
int32x4_t sum1 = vmull_lane_s16(vget_high_s16(s0), y_filter_0_3, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s1), y_filter_0_3, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s2), y_filter_0_3, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s3), y_filter_0_3, 3);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s4), y_filter_4_7, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s5), y_filter_4_7, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s6), y_filter_4_7, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s7), y_filter_4_7, 3);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s8), y_filter_8_11, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s9), y_filter_8_11, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s10), y_filter_8_11, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s11), y_filter_8_11, 3);
int16x8_t res =
vcombine_s16(vqrshrn_n_s32(sum0, 2 * FILTER_BITS - ROUND0_BITS),
vqrshrn_n_s32(sum1, 2 * FILTER_BITS - ROUND0_BITS));
res = vsubq_s16(res, sub_const);
return vqmovun_s16(res);
}
static inline void convolve_2d_sr_vert_12tap_neon(
int16_t *src_ptr,
int src_stride, uint8_t *dst_ptr,
int dst_stride,
int w,
int h,
const int16x8_t y_filter_0_7,
const int16x4_t y_filter_8_11) {
const int bd = 8;
const int16x8_t sub_const = vdupq_n_s16(1 << (bd - 1));
if (w <= 4) {
int16x4_t s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10;
load_s16_4x11(src_ptr, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7,
&s8, &s9, &s10);
src_ptr += 11 * src_stride;
do {
int16x4_t s11, s12, s13, s14;
load_s16_4x4(src_ptr, src_stride, &s11, &s12, &s13, &s14);
int32x4_t d0 = convolve12_4_2d_v(s0, s1, s2, s3, s4, s5, s6, s7, s8, s9,
s10, s11, y_filter_0_7, y_filter_8_11);
int32x4_t d1 = convolve12_4_2d_v(s1, s2, s3, s4, s5, s6, s7, s8, s9, s10,
s11, s12, y_filter_0_7, y_filter_8_11);
int32x4_t d2 = convolve12_4_2d_v(s2, s3, s4, s5, s6, s7, s8, s9, s10, s11,
s12, s13, y_filter_0_7, y_filter_8_11);
int32x4_t d3 =
convolve12_4_2d_v(s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14,
y_filter_0_7, y_filter_8_11);
int16x8_t dd01 =
vcombine_s16(vqrshrn_n_s32(d0, 2 * FILTER_BITS - ROUND0_BITS),
vqrshrn_n_s32(d1, 2 * FILTER_BITS - ROUND0_BITS));
int16x8_t dd23 =
vcombine_s16(vqrshrn_n_s32(d2, 2 * FILTER_BITS - ROUND0_BITS),
vqrshrn_n_s32(d3, 2 * FILTER_BITS - ROUND0_BITS));
dd01 = vsubq_s16(dd01, sub_const);
dd23 = vsubq_s16(dd23, sub_const);
uint8x8_t d01 = vqmovun_s16(dd01);
uint8x8_t d23 = vqmovun_s16(dd23);
store_u8x4_strided_x2(dst_ptr + 0 * dst_stride, dst_stride, d01);
store_u8x4_strided_x2(dst_ptr + 2 * dst_stride, dst_stride, d23);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
s5 = s9;
s6 = s10;
s7 = s11;
s8 = s12;
s9 = s13;
s10 = s14;
src_ptr += 4 * src_stride;
dst_ptr += 4 * dst_stride;
h -= 4;
}
while (h != 0);
}
else {
do {
int height = h;
int16_t *s = src_ptr;
uint8_t *d = dst_ptr;
int16x8_t s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10;
load_s16_8x11(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6, &s7, &s8,
&s9, &s10);
s += 11 * src_stride;
do {
int16x8_t s11, s12, s13, s14;
load_s16_8x4(s, src_stride, &s11, &s12, &s13, &s14);
uint8x8_t d0 =
convolve12_8_2d_v(s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11,
y_filter_0_7, y_filter_8_11, sub_const);
uint8x8_t d1 =
convolve12_8_2d_v(s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12,
y_filter_0_7, y_filter_8_11, sub_const);
uint8x8_t d2 =
convolve12_8_2d_v(s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12,
s13, y_filter_0_7, y_filter_8_11, sub_const);
uint8x8_t d3 =
convolve12_8_2d_v(s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13,
s14, y_filter_0_7, y_filter_8_11, sub_const);
store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
s5 = s9;
s6 = s10;
s7 = s11;
s8 = s12;
s9 = s13;
s10 = s14;
s += 4 * src_stride;
d += 4 * dst_stride;
height -= 4;
}
while (height != 0);
src_ptr += 8;
dst_ptr += 8;
w -= 8;
}
while (w != 0);
}
}
static inline int16x4_t convolve8_4_2d_v(
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 y_filter) {
const int16x4_t y_filter_lo = vget_low_s16(y_filter);
const int16x4_t y_filter_hi = vget_high_s16(y_filter);
int32x4_t sum = vmull_lane_s16(s0, y_filter_lo, 0);
sum = vmlal_lane_s16(sum, s1, y_filter_lo, 1);
sum = vmlal_lane_s16(sum, s2, y_filter_lo, 2);
sum = vmlal_lane_s16(sum, s3, y_filter_lo, 3);
sum = vmlal_lane_s16(sum, s4, y_filter_hi, 0);
sum = vmlal_lane_s16(sum, s5, y_filter_hi, 1);
sum = vmlal_lane_s16(sum, s6, y_filter_hi, 2);
sum = vmlal_lane_s16(sum, s7, y_filter_hi, 3);
return vqrshrn_n_s32(sum, 2 * FILTER_BITS - ROUND0_BITS);
}
static inline uint8x8_t convolve8_8_2d_v(
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 y_filter,
const int16x8_t sub_const) {
const int16x4_t y_filter_lo = vget_low_s16(y_filter);
const int16x4_t y_filter_hi = vget_high_s16(y_filter);
int32x4_t sum0 = vmull_lane_s16(vget_low_s16(s0), y_filter_lo, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s1), y_filter_lo, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s2), y_filter_lo, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s3), y_filter_lo, 3);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s4), y_filter_hi, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s5), y_filter_hi, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s6), y_filter_hi, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s7), y_filter_hi, 3);
int32x4_t sum1 = vmull_lane_s16(vget_high_s16(s0), y_filter_lo, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s1), y_filter_lo, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s2), y_filter_lo, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s3), y_filter_lo, 3);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s4), y_filter_hi, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s5), y_filter_hi, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s6), y_filter_hi, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s7), y_filter_hi, 3);
int16x8_t res =
vcombine_s16(vqrshrn_n_s32(sum0, 2 * FILTER_BITS - ROUND0_BITS),
vqrshrn_n_s32(sum1, 2 * FILTER_BITS - ROUND0_BITS));
res = vsubq_s16(res, sub_const);
return vqmovun_s16(res);
}
static inline void convolve_2d_sr_vert_8tap_neon(int16_t *src_ptr,
int src_stride,
uint8_t *dst_ptr,
int dst_stride,
int w,
int h,
const int16x8_t y_filter) {
const int bd = 8;
const int16x8_t sub_const = vdupq_n_s16(1 << (bd - 1));
if (w <= 4) {
int16x4_t s0, s1, s2, s3, s4, s5, s6;
load_s16_4x7(src_ptr, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6);
src_ptr += 7 * src_stride;
do {
#if AOM_ARCH_AARCH64
int16x4_t s7, s8, s9, s10;
load_s16_4x4(src_ptr, src_stride, &s7, &s8, &s9, &s10);
int16x4_t d0 = convolve8_4_2d_v(s0, s1, s2, s3, s4, s5, s6, s7, y_filter);
int16x4_t d1 = convolve8_4_2d_v(s1, s2, s3, s4, s5, s6, s7, s8, y_filter);
int16x4_t d2 = convolve8_4_2d_v(s2, s3, s4, s5, s6, s7, s8, s9, y_filter);
int16x4_t d3 =
convolve8_4_2d_v(s3, s4, s5, s6, s7, s8, s9, s10, y_filter);
uint8x8_t d01 = vqmovun_s16(vsubq_s16(vcombine_s16(d0, d1), sub_const));
uint8x8_t d23 = vqmovun_s16(vsubq_s16(vcombine_s16(d2, d3), sub_const));
store_u8x4_strided_x2(dst_ptr + 0 * dst_stride, dst_stride, d01);
store_u8x4_strided_x2(dst_ptr + 2 * dst_stride, dst_stride, d23);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
s5 = s9;
s6 = s10;
src_ptr += 4 * src_stride;
dst_ptr += 4 * dst_stride;
h -= 4;
#else // !AOM_ARCH_AARCH64
int16x4_t s7 = vld1_s16(src_ptr);
int16x4_t d0 = convolve8_4_2d_v(s0, s1, s2, s3, s4, s5, s6, s7, y_filter);
uint8x8_t d01 =
vqmovun_s16(vsubq_s16(vcombine_s16(d0, vdup_n_s16(0)), sub_const));
store_u8_4x1(dst_ptr, d01);
s0 = s1;
s1 = s2;
s2 = s3;
s3 = s4;
s4 = s5;
s5 = s6;
s6 = s7;
src_ptr += src_stride;
dst_ptr += dst_stride;
h--;
#endif // AOM_ARCH_AARCH64
}
while (h != 0);
}
else {
// Width is a multiple of 8 and height is a multiple of 4.
do {
int height = h;
int16_t *s = src_ptr;
uint8_t *d = dst_ptr;
int16x8_t s0, s1, s2, s3, s4, s5, s6;
load_s16_8x7(s, src_stride, &s0, &s1, &s2, &s3, &s4, &s5, &s6);
s += 7 * src_stride;
do {
#if AOM_ARCH_AARCH64
int16x8_t s7, s8, s9, s10;
load_s16_8x4(s, src_stride, &s7, &s8, &s9, &s10);
uint8x8_t d0 = convolve8_8_2d_v(s0, s1, s2, s3, s4, s5, s6, s7,
y_filter, sub_const);
uint8x8_t d1 = convolve8_8_2d_v(s1, s2, s3, s4, s5, s6, s7, s8,
y_filter, sub_const);
uint8x8_t d2 = convolve8_8_2d_v(s2, s3, s4, s5, s6, s7, s8, s9,
y_filter, sub_const);
uint8x8_t d3 = convolve8_8_2d_v(s3, s4, s5, s6, s7, s8, s9, s10,
y_filter, sub_const);
store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
s5 = s9;
s6 = s10;
s += 4 * src_stride;
d += 4 * dst_stride;
height -= 4;
#else // !AOM_ARCH_AARCH64
int16x8_t s7 = vld1q_s16(s);
uint8x8_t d0 = convolve8_8_2d_v(s0, s1, s2, s3, s4, s5, s6, s7,
y_filter, sub_const);
vst1_u8(d, d0);
s0 = s1;
s1 = s2;
s2 = s3;
s3 = s4;
s4 = s5;
s5 = s6;
s6 = s7;
s += src_stride;
d += dst_stride;
height--;
#endif // AOM_ARCH_AARCH64
}
while (height != 0);
src_ptr += 8;
dst_ptr += 8;
w -= 8;
}
while (w != 0);
}
}
static inline int16x4_t convolve6_4_2d_v(
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 int16x8_t y_filter) {
const int16x4_t y_filter_lo = vget_low_s16(y_filter);
const int16x4_t y_filter_hi = vget_high_s16(y_filter);
int32x4_t sum = vmull_lane_s16(s0, y_filter_lo, 1);
sum = vmlal_lane_s16(sum, s1, y_filter_lo, 2);
sum = vmlal_lane_s16(sum, s2, y_filter_lo, 3);
sum = vmlal_lane_s16(sum, s3, y_filter_hi, 0);
sum = vmlal_lane_s16(sum, s4, y_filter_hi, 1);
sum = vmlal_lane_s16(sum, s5, y_filter_hi, 2);
return vqrshrn_n_s32(sum, 2 * FILTER_BITS - ROUND0_BITS);
}
static inline uint8x8_t convolve6_8_2d_v(
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 y_filter,
const int16x8_t sub_const) {
const int16x4_t y_filter_lo = vget_low_s16(y_filter);
const int16x4_t y_filter_hi = vget_high_s16(y_filter);
int32x4_t sum0 = vmull_lane_s16(vget_low_s16(s0), y_filter_lo, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s1), y_filter_lo, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s2), y_filter_lo, 3);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s3), y_filter_hi, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s4), y_filter_hi, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s5), y_filter_hi, 2);
int32x4_t sum1 = vmull_lane_s16(vget_high_s16(s0), y_filter_lo, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s1), y_filter_lo, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s2), y_filter_lo, 3);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s3), y_filter_hi, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s4), y_filter_hi, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s5), y_filter_hi, 2);
int16x8_t res =
vcombine_s16(vqrshrn_n_s32(sum0, 2 * FILTER_BITS - ROUND0_BITS),
vqrshrn_n_s32(sum1, 2 * FILTER_BITS - ROUND0_BITS));
res = vsubq_s16(res, sub_const);
return vqmovun_s16(res);
}
static inline void convolve_2d_sr_vert_6tap_neon(int16_t *src_ptr,
int src_stride,
uint8_t *dst_ptr,
int dst_stride,
int w,
int h,
const int16x8_t y_filter) {
const int bd = 8;
const int16x8_t sub_const = vdupq_n_s16(1 << (bd - 1));
if (w <= 4) {
int16x4_t s0, s1, s2, s3, s4;
load_s16_4x5(src_ptr, src_stride, &s0, &s1, &s2, &s3, &s4);
src_ptr += 5 * src_stride;
do {
#if AOM_ARCH_AARCH64
int16x4_t s5, s6, s7, s8;
load_s16_4x4(src_ptr, src_stride, &s5, &s6, &s7, &s8);
int16x4_t d0 = convolve6_4_2d_v(s0, s1, s2, s3, s4, s5, y_filter);
int16x4_t d1 = convolve6_4_2d_v(s1, s2, s3, s4, s5, s6, y_filter);
int16x4_t d2 = convolve6_4_2d_v(s2, s3, s4, s5, s6, s7, y_filter);
int16x4_t d3 = convolve6_4_2d_v(s3, s4, s5, s6, s7, s8, y_filter);
uint8x8_t d01 = vqmovun_s16(vsubq_s16(vcombine_s16(d0, d1), sub_const));
uint8x8_t d23 = vqmovun_s16(vsubq_s16(vcombine_s16(d2, d3), sub_const));
store_u8x4_strided_x2(dst_ptr + 0 * dst_stride, dst_stride, d01);
store_u8x4_strided_x2(dst_ptr + 2 * dst_stride, dst_stride, d23);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
src_ptr += 4 * src_stride;
dst_ptr += 4 * dst_stride;
h -= 4;
#else // !AOM_ARCH_AARCH64
int16x4_t s5 = vld1_s16(src_ptr);
int16x4_t d0 = convolve6_4_2d_v(s0, s1, s2, s3, s4, s5, y_filter);
uint8x8_t d01 =
vqmovun_s16(vsubq_s16(vcombine_s16(d0, vdup_n_s16(0)), sub_const));
store_u8_4x1(dst_ptr, d01);
s0 = s1;
s1 = s2;
s2 = s3;
s3 = s4;
s4 = s5;
src_ptr += src_stride;
dst_ptr += dst_stride;
h--;
#endif // AOM_ARCH_AARCH64
}
while (h != 0);
}
else {
// Width is a multiple of 8 and height is a multiple of 4.
do {
int height = h;
int16_t *s = src_ptr;
uint8_t *d = dst_ptr;
int16x8_t s0, s1, s2, s3, s4;
load_s16_8x5(s, src_stride, &s0, &s1, &s2, &s3, &s4);
s += 5 * src_stride;
do {
#if AOM_ARCH_AARCH64
int16x8_t s5, s6, s7, s8;
load_s16_8x4(s, src_stride, &s5, &s6, &s7, &s8);
uint8x8_t d0 =
convolve6_8_2d_v(s0, s1, s2, s3, s4, s5, y_filter, sub_const);
uint8x8_t d1 =
convolve6_8_2d_v(s1, s2, s3, s4, s5, s6, y_filter, sub_const);
uint8x8_t d2 =
convolve6_8_2d_v(s2, s3, s4, s5, s6, s7, y_filter, sub_const);
uint8x8_t d3 =
convolve6_8_2d_v(s3, s4, s5, s6, s7, s8, y_filter, sub_const);
store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
s0 = s4;
s1 = s5;
s2 = s6;
s3 = s7;
s4 = s8;
s += 4 * src_stride;
d += 4 * dst_stride;
height -= 4;
#else // !AOM_ARCH_AARCH64
int16x8_t s5 = vld1q_s16(s);
uint8x8_t d0 =
convolve6_8_2d_v(s0, s1, s2, s3, s4, s5, y_filter, sub_const);
vst1_u8(d, d0);
s0 = s1;
s1 = s2;
s2 = s3;
s3 = s4;
s4 = s5;
s += src_stride;
d += dst_stride;
height--;
#endif // AOM_ARCH_AARCH64
}
while (height != 0);
src_ptr += 8;
dst_ptr += 8;
w -= 8;
}
while (w != 0);
}
}
static inline int16x4_t convolve4_4_2d_v(
const int16x4_t s0,
const int16x4_t s1,
const int16x4_t s2,
const int16x4_t s3,
const int16x4_t y_filter) {
int32x4_t sum = vmull_lane_s16(s0, y_filter, 0);
sum = vmlal_lane_s16(sum, s1, y_filter, 1);
sum = vmlal_lane_s16(sum, s2, y_filter, 2);
sum = vmlal_lane_s16(sum, s3, y_filter, 3);
return vqrshrn_n_s32(sum, 2 * FILTER_BITS - ROUND0_BITS);
}
static inline uint8x8_t convolve4_8_2d_v(
const int16x8_t s0,
const int16x8_t s1,
const int16x8_t s2,
const int16x8_t s3,
const int16x4_t y_filter,
const int16x8_t sub_const) {
int32x4_t sum0 = vmull_lane_s16(vget_low_s16(s0), y_filter, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s1), y_filter, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s2), y_filter, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s3), y_filter, 3);
int32x4_t sum1 = vmull_lane_s16(vget_high_s16(s0), y_filter, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s1), y_filter, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s2), y_filter, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s3), y_filter, 3);
int16x8_t res =
vcombine_s16(vqrshrn_n_s32(sum0, 2 * FILTER_BITS - ROUND0_BITS),
vqrshrn_n_s32(sum1, 2 * FILTER_BITS - ROUND0_BITS));
res = vsubq_s16(res, sub_const);
return vqmovun_s16(res);
}
static inline void convolve_2d_sr_vert_4tap_neon(int16_t *src_ptr,
int src_stride,
uint8_t *dst_ptr,
int dst_stride,
int w,
int h,
const int16_t *y_filter) {
const int bd = 8;
const int16x8_t sub_const = vdupq_n_s16(1 << (bd - 1));
const int16x4_t filter = vld1_s16(y_filter + 2);
if (w == 4) {
int16x4_t s0, s1, s2;
load_s16_4x3(src_ptr, src_stride, &s0, &s1, &s2);
src_ptr += 3 * src_stride;
do {
int16x4_t s3, s4, s5, s6;
load_s16_4x4(src_ptr, src_stride, &s3, &s4, &s5, &s6);
int16x4_t d0 = convolve4_4_2d_v(s0, s1, s2, s3, filter);
int16x4_t d1 = convolve4_4_2d_v(s1, s2, s3, s4, filter);
int16x4_t d2 = convolve4_4_2d_v(s2, s3, s4, s5, filter);
int16x4_t d3 = convolve4_4_2d_v(s3, s4, s5, s6, filter);
uint8x8_t d01 = vqmovun_s16(vsubq_s16(vcombine_s16(d0, d1), sub_const));
uint8x8_t d23 = vqmovun_s16(vsubq_s16(vcombine_s16(d2, d3), sub_const));
store_u8x4_strided_x2(dst_ptr + 0 * dst_stride, dst_stride, d01);
store_u8x4_strided_x2(dst_ptr + 2 * dst_stride, dst_stride, d23);
s0 = s4;
s1 = s5;
s2 = s6;
src_ptr += 4 * src_stride;
dst_ptr += 4 * dst_stride;
h -= 4;
}
while (h != 0);
}
else {
// Width is a multiple of 8 and height is a multiple of 4.
do {
int height = h;
int16_t *s = src_ptr;
uint8_t *d = dst_ptr;
int16x8_t s0, s1, s2;
load_s16_8x3(s, src_stride, &s0, &s1, &s2);
s += 3 * src_stride;
do {
int16x8_t s3, s4, s5, s6;
load_s16_8x4(s, src_stride, &s3, &s4, &s5, &s6);
uint8x8_t d0 = convolve4_8_2d_v(s0, s1, s2, s3, filter, sub_const);
uint8x8_t d1 = convolve4_8_2d_v(s1, s2, s3, s4, filter, sub_const);
uint8x8_t d2 = convolve4_8_2d_v(s2, s3, s4, s5, filter, sub_const);
uint8x8_t d3 = convolve4_8_2d_v(s3, s4, s5, s6, filter, sub_const);
store_u8_8x4(d, dst_stride, d0, d1, d2, d3);
s0 = s4;
s1 = s5;
s2 = s6;
s += 4 * src_stride;
d += 4 * dst_stride;
height -= 4;
}
while (height != 0);
src_ptr += 8;
dst_ptr += 8;
w -= 8;
}
while (w != 0);
}
}
#endif // AOM_AV1_COMMON_ARM_CONVOLVE_NEON_H_
