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/*
* Copyright (c) 2017 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_dsp_rtcd.h"
#include "./vpx_config.h"
#include "vpx_dsp/arm/mem_neon.h"
#include "vpx_dsp/arm/sum_neon.h"
void vpx_fdct4x4_1_neon(const int16_t *input, tran_low_t *output, int stride) {
int16x4_t a0, a1, a2, a3;
int16x8_t b0, b1;
int16x8_t c;
a0 = vld1_s16(input);
input += stride;
a1 = vld1_s16(input);
input += stride;
a2 = vld1_s16(input);
input += stride;
a3 = vld1_s16(input);
b0 = vcombine_s16(a0, a1);
b1 = vcombine_s16(a2, a3);
c = vaddq_s16(b0, b1);
output[0] = (tran_low_t)(horizontal_add_int16x8(c) << 1);
output[1] = 0;
}
void vpx_fdct8x8_1_neon(const int16_t *input, tran_low_t *output, int stride) {
int r;
int16x8_t sum = vld1q_s16(&input[0]);
for (r = 1; r < 8; ++r) {
const int16x8_t input_00 = vld1q_s16(&input[r * stride]);
sum = vaddq_s16(sum, input_00);
}
output[0] = (tran_low_t)horizontal_add_int16x8(sum);
output[1] = 0;
}
void vpx_fdct16x16_1_neon(const int16_t *input, tran_low_t *output,
int stride) {
int r;
int16x8_t left = vld1q_s16(input);
int16x8_t right = vld1q_s16(input + 8);
int32_t sum;
input += stride;
for (r = 1; r < 16; ++r) {
const int16x8_t a = vld1q_s16(input);
const int16x8_t b = vld1q_s16(input + 8);
input += stride;
left = vaddq_s16(left, a);
right = vaddq_s16(right, b);
}
sum = horizontal_add_int16x8(left) + horizontal_add_int16x8(right);
output[0] = (tran_low_t)(sum >> 1);
output[1] = 0;
}
void vpx_fdct32x32_1_neon(const int16_t *input, tran_low_t *output,
int stride) {
int r;
int16x8_t a0 = vld1q_s16(input);
int16x8_t a1 = vld1q_s16(input + 8);
int16x8_t a2 = vld1q_s16(input + 16);
int16x8_t a3 = vld1q_s16(input + 24);
int32_t sum;
input += stride;
for (r = 1; r < 32; ++r) {
const int16x8_t b0 = vld1q_s16(input);
const int16x8_t b1 = vld1q_s16(input + 8);
const int16x8_t b2 = vld1q_s16(input + 16);
const int16x8_t b3 = vld1q_s16(input + 24);
input += stride;
a0 = vaddq_s16(a0, b0);
a1 = vaddq_s16(a1, b1);
a2 = vaddq_s16(a2, b2);
a3 = vaddq_s16(a3, b3);
}
sum = horizontal_add_int16x8(a0);
sum += horizontal_add_int16x8(a1);
sum += horizontal_add_int16x8(a2);
sum += horizontal_add_int16x8(a3);
output[0] = (tran_low_t)(sum >> 3);
output[1] = 0;
}
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