/*
* 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_dsp_rtcd.h"
#include "vpx_dsp/arm/idct_neon.h"
#include "vpx_dsp/inv_txfm.h"
static INLINE void idct32x32_1_add_pos_kernel(uint8_t **dest,
const int stride,
const uint8x16_t res) {
const uint8x16_t a0 = vld1q_u8(*dest);
const uint8x16_t a1 = vld1q_u8(*dest + 16);
const uint8x16_t b0 = vqaddq_u8(a0, res);
const uint8x16_t b1 = vqaddq_u8(a1, res);
vst1q_u8(*dest, b0);
vst1q_u8(*dest + 16, b1);
*dest += stride;
}
static INLINE void idct32x32_1_add_neg_kernel(uint8_t **dest,
const int stride,
const uint8x16_t res) {
const uint8x16_t a0 = vld1q_u8(*dest);
const uint8x16_t a1 = vld1q_u8(*dest + 16);
const uint8x16_t b0 = vqsubq_u8(a0, res);
const uint8x16_t b1 = vqsubq_u8(a1, res);
vst1q_u8(*dest, b0);
vst1q_u8(*dest + 16, b1);
*dest += stride;
}
void vpx_idct32x32_1_add_neon(
const tran_low_t *input, uint8_t *dest,
int stride) {
int i;
const int16_t out0 =
WRAPLOW(dct_const_round_shift((int16_t)input[0] * cospi_16_64));
const int16_t out1 = WRAPLOW(dct_const_round_shift(out0 * cospi_16_64));
const int16_t a1 = ROUND_POWER_OF_TWO(out1, 6);
if (a1 >= 0) {
const uint8x16_t dc = create_dcq(a1);
for (i = 0; i < 32; i++) {
idct32x32_1_add_pos_kernel(&dest, stride, dc);
}
}
else {
const uint8x16_t dc = create_dcq(-a1);
for (i = 0; i < 32; i++) {
idct32x32_1_add_neg_kernel(&dest, stride, dc);
}
}
}
