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/*
* Copyright (c) 2024, 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_AOM_DSP_ARM_HIGHBD_CONVOLVE8_NEON_H_
#define AOM_AOM_DSP_ARM_HIGHBD_CONVOLVE8_NEON_H_
#include <arm_neon.h>
#include "config/aom_config.h"
#include "aom_dsp/arm/mem_neon.h"
static inline void highbd_convolve8_horiz_2tap_neon(
const uint16_t *src_ptr, ptrdiff_t src_stride, uint16_t *dst_ptr,
ptrdiff_t dst_stride, const int16_t *x_filter_ptr, int w, int h, int bd) {
// Bilinear filter values are all positive and multiples of 8. Divide by 8 to
// reduce intermediate precision requirements and allow the use of non
// widening multiply.
const uint16x8_t f0 = vdupq_n_u16((uint16_t)x_filter_ptr[3] / 8);
const uint16x8_t f1 = vdupq_n_u16((uint16_t)x_filter_ptr[4] / 8);
const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);
if (w == 4) {
do {
uint16x8_t s0 =
load_unaligned_u16_4x2(src_ptr + 0 * src_stride + 0, (int)src_stride);
uint16x8_t s1 =
load_unaligned_u16_4x2(src_ptr + 0 * src_stride + 1, (int)src_stride);
uint16x8_t s2 =
load_unaligned_u16_4x2(src_ptr + 2 * src_stride + 0, (int)src_stride);
uint16x8_t s3 =
load_unaligned_u16_4x2(src_ptr + 2 * src_stride + 1, (int)src_stride);
uint16x8_t sum01 = vmulq_u16(s0, f0);
sum01 = vmlaq_u16(sum01, s1, f1);
uint16x8_t sum23 = vmulq_u16(s2, f0);
sum23 = vmlaq_u16(sum23, s3, f1);
// We divided filter taps by 8 so subtract 3 from right shift.
sum01 = vrshrq_n_u16(sum01, FILTER_BITS - 3);
sum23 = vrshrq_n_u16(sum23, FILTER_BITS - 3);
sum01 = vminq_u16(sum01, max);
sum23 = vminq_u16(sum23, max);
store_u16x4_strided_x2(dst_ptr + 0 * dst_stride, (int)dst_stride, sum01);
store_u16x4_strided_x2(dst_ptr + 2 * dst_stride, (int)dst_stride, sum23);
src_ptr += 4 * src_stride;
dst_ptr += 4 * dst_stride;
h -= 4;
} while (h > 0);
} else {
do {
int width = w;
const uint16_t *s = src_ptr;
uint16_t *d = dst_ptr;
do {
uint16x8_t s0 = vld1q_u16(s + 0 * src_stride + 0);
uint16x8_t s1 = vld1q_u16(s + 0 * src_stride + 1);
uint16x8_t s2 = vld1q_u16(s + 1 * src_stride + 0);
uint16x8_t s3 = vld1q_u16(s + 1 * src_stride + 1);
uint16x8_t sum01 = vmulq_u16(s0, f0);
sum01 = vmlaq_u16(sum01, s1, f1);
uint16x8_t sum23 = vmulq_u16(s2, f0);
sum23 = vmlaq_u16(sum23, s3, f1);
// We divided filter taps by 8 so subtract 3 from right shift.
sum01 = vrshrq_n_u16(sum01, FILTER_BITS - 3);
sum23 = vrshrq_n_u16(sum23, FILTER_BITS - 3);
sum01 = vminq_u16(sum01, max);
sum23 = vminq_u16(sum23, max);
vst1q_u16(d + 0 * dst_stride, sum01);
vst1q_u16(d + 1 * dst_stride, sum23);
s += 8;
d += 8;
width -= 8;
} while (width != 0);
src_ptr += 2 * src_stride;
dst_ptr += 2 * dst_stride;
h -= 2;
} while (h > 0);
}
}
static inline uint16x4_t highbd_convolve4_4(
const int16x4_t s0, const int16x4_t s1, const int16x4_t s2,
const int16x4_t s3, const int16x4_t filter, const uint16x4_t max) {
int32x4_t sum = vmull_lane_s16(s0, filter, 0);
sum = vmlal_lane_s16(sum, s1, filter, 1);
sum = vmlal_lane_s16(sum, s2, filter, 2);
sum = vmlal_lane_s16(sum, s3, filter, 3);
uint16x4_t res = vqrshrun_n_s32(sum, FILTER_BITS);
return vmin_u16(res, max);
}
static inline uint16x8_t highbd_convolve4_8(
const int16x8_t s0, const int16x8_t s1, const int16x8_t s2,
const int16x8_t s3, const int16x4_t filter, const uint16x8_t max) {
int32x4_t sum0 = vmull_lane_s16(vget_low_s16(s0), filter, 0);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s1), filter, 1);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s2), filter, 2);
sum0 = vmlal_lane_s16(sum0, vget_low_s16(s3), filter, 3);
int32x4_t sum1 = vmull_lane_s16(vget_high_s16(s0), filter, 0);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s1), filter, 1);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s2), filter, 2);
sum1 = vmlal_lane_s16(sum1, vget_high_s16(s3), filter, 3);
uint16x8_t res = vcombine_u16(vqrshrun_n_s32(sum0, FILTER_BITS),
vqrshrun_n_s32(sum1, FILTER_BITS));
return vminq_u16(res, max);
}
static inline void highbd_convolve8_vert_4tap_neon(
const uint16_t *src_ptr, ptrdiff_t src_stride, uint16_t *dst_ptr,
ptrdiff_t dst_stride, const int16_t *y_filter_ptr, int w, int h, int bd) {
assert(w >= 4 && h >= 4);
const int16x4_t y_filter = vld1_s16(y_filter_ptr + 2);
if (w == 4) {
const uint16x4_t max = vdup_n_u16((1 << bd) - 1);
const int16_t *s = (const int16_t *)src_ptr;
uint16_t *d = dst_ptr;
int16x4_t s0, s1, s2;
load_s16_4x3(s, src_stride, &s0, &s1, &s2);
s += 3 * src_stride;
do {
int16x4_t s3, s4, s5, s6;
load_s16_4x4(s, src_stride, &s3, &s4, &s5, &s6);
uint16x4_t d0 = highbd_convolve4_4(s0, s1, s2, s3, y_filter, max);
uint16x4_t d1 = highbd_convolve4_4(s1, s2, s3, s4, y_filter, max);
uint16x4_t d2 = highbd_convolve4_4(s2, s3, s4, s5, y_filter, max);
uint16x4_t d3 = highbd_convolve4_4(s3, s4, s5, s6, y_filter, max);
store_u16_4x4(d, dst_stride, d0, d1, d2, d3);
s0 = s4;
s1 = s5;
s2 = s6;
s += 4 * src_stride;
d += 4 * dst_stride;
h -= 4;
} while (h > 0);
} else {
const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);
do {
int height = h;
const int16_t *s = (const int16_t *)src_ptr;
uint16_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);
uint16x8_t d0 = highbd_convolve4_8(s0, s1, s2, s3, y_filter, max);
uint16x8_t d1 = highbd_convolve4_8(s1, s2, s3, s4, y_filter, max);
uint16x8_t d2 = highbd_convolve4_8(s2, s3, s4, s5, y_filter, max);
uint16x8_t d3 = highbd_convolve4_8(s3, s4, s5, s6, y_filter, max);
store_u16_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);
}
}
static inline void highbd_convolve8_vert_2tap_neon(
const uint16_t *src_ptr, ptrdiff_t src_stride, uint16_t *dst_ptr,
ptrdiff_t dst_stride, const int16_t *x_filter_ptr, int w, int h, int bd) {
// Bilinear filter values are all positive and multiples of 8. Divide by 8 to
// reduce intermediate precision requirements and allow the use of non
// widening multiply.
const uint16x8_t f0 = vdupq_n_u16((uint16_t)x_filter_ptr[3] / 8);
const uint16x8_t f1 = vdupq_n_u16((uint16_t)x_filter_ptr[4] / 8);
const uint16x8_t max = vdupq_n_u16((1 << bd) - 1);
if (w == 4) {
do {
uint16x8_t s0 =
load_unaligned_u16_4x2(src_ptr + 0 * src_stride, (int)src_stride);
uint16x8_t s1 =
load_unaligned_u16_4x2(src_ptr + 1 * src_stride, (int)src_stride);
uint16x8_t s2 =
load_unaligned_u16_4x2(src_ptr + 2 * src_stride, (int)src_stride);
uint16x8_t s3 =
load_unaligned_u16_4x2(src_ptr + 3 * src_stride, (int)src_stride);
uint16x8_t sum01 = vmulq_u16(s0, f0);
sum01 = vmlaq_u16(sum01, s1, f1);
uint16x8_t sum23 = vmulq_u16(s2, f0);
sum23 = vmlaq_u16(sum23, s3, f1);
// We divided filter taps by 8 so subtract 3 from right shift.
sum01 = vrshrq_n_u16(sum01, FILTER_BITS - 3);
sum23 = vrshrq_n_u16(sum23, FILTER_BITS - 3);
sum01 = vminq_u16(sum01, max);
sum23 = vminq_u16(sum23, max);
store_u16x4_strided_x2(dst_ptr + 0 * dst_stride, (int)dst_stride, sum01);
store_u16x4_strided_x2(dst_ptr + 2 * dst_stride, (int)dst_stride, sum23);
src_ptr += 4 * src_stride;
dst_ptr += 4 * dst_stride;
h -= 4;
} while (h > 0);
} else {
do {
int width = w;
const uint16_t *s = src_ptr;
uint16_t *d = dst_ptr;
do {
uint16x8_t s0, s1, s2;
load_u16_8x3(s, src_stride, &s0, &s1, &s2);
uint16x8_t sum01 = vmulq_u16(s0, f0);
sum01 = vmlaq_u16(sum01, s1, f1);
uint16x8_t sum23 = vmulq_u16(s1, f0);
sum23 = vmlaq_u16(sum23, s2, f1);
// We divided filter taps by 8 so subtract 3 from right shift.
sum01 = vrshrq_n_u16(sum01, FILTER_BITS - 3);
sum23 = vrshrq_n_u16(sum23, FILTER_BITS - 3);
sum01 = vminq_u16(sum01, max);
sum23 = vminq_u16(sum23, max);
vst1q_u16(d + 0 * dst_stride, sum01);
vst1q_u16(d + 1 * dst_stride, sum23);
s += 8;
d += 8;
width -= 8;
} while (width != 0);
src_ptr += 2 * src_stride;
dst_ptr += 2 * dst_stride;
h -= 2;
} while (h > 0);
}
}
#endif // AOM_AOM_DSP_ARM_HIGHBD_CONVOLVE8_NEON_H_