| /* |
| * 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/inv_txfm.h" |
| |
| static INLINE uint8x8_t create_dcd(const int16_t dc) { |
| int16x8_t t = vdupq_n_s16(dc); |
| return vqmovun_s16(t); |
| } |
| |
| static INLINE void idct8x8_1_add_pos_kernel(uint8_t **dest, const int stride, |
| const uint8x8_t res) { |
| const uint8x8_t a = vld1_u8(*dest); |
| const uint8x8_t b = vqadd_u8(a, res); |
| vst1_u8(*dest, b); |
| *dest += stride; |
| } |
| |
| static INLINE void idct8x8_1_add_neg_kernel(uint8_t **dest, const int stride, |
| const uint8x8_t res) { |
| const uint8x8_t a = vld1_u8(*dest); |
| const uint8x8_t b = vqsub_u8(a, res); |
| vst1_u8(*dest, b); |
| *dest += stride; |
| } |
| |
| void vpx_idct8x8_1_add_neon(const tran_low_t *input, uint8_t *dest, |
| int stride) { |
| 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, 5); |
| |
| if (a1 >= 0) { |
| const uint8x8_t dc = create_dcd(a1); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| idct8x8_1_add_pos_kernel(&dest, stride, dc); |
| } else { |
| const uint8x8_t dc = create_dcd(-a1); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| idct8x8_1_add_neg_kernel(&dest, stride, dc); |
| } |
| } |