1 /*
2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <arm_neon.h>
12
13 #include "./vpx_config.h"
14 #include "./vpx_dsp_rtcd.h"
15 #include "vpx_dsp/arm/idct_neon.h"
16 #include "vpx_dsp/arm/mem_neon.h"
17 #include "vpx_dsp/arm/transpose_neon.h"
18 #include "vpx_dsp/txfm_common.h"
19
vpx_idct8x8_64_add_neon(const tran_low_t * input,uint8_t * dest,int stride)20 void vpx_idct8x8_64_add_neon(const tran_low_t *input, uint8_t *dest,
21 int stride) {
22 const int16x8_t cospis = vld1q_s16(kCospi);
23 const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24
24 const int16x4_t cospis1 = vget_high_s16(cospis); // cospi 4, 12, 20, 28
25 int16x8_t a[8];
26
27 a[0] = load_tran_low_to_s16q(input);
28 a[1] = load_tran_low_to_s16q(input + 8);
29 a[2] = load_tran_low_to_s16q(input + 16);
30 a[3] = load_tran_low_to_s16q(input + 24);
31 a[4] = load_tran_low_to_s16q(input + 32);
32 a[5] = load_tran_low_to_s16q(input + 40);
33 a[6] = load_tran_low_to_s16q(input + 48);
34 a[7] = load_tran_low_to_s16q(input + 56);
35
36 idct8x8_64_1d_bd8(cospis0, cospis1, a);
37 idct8x8_64_1d_bd8(cospis0, cospis1, a);
38 idct8x8_add8x8_neon(a, dest, stride);
39 }
40
vpx_idct8x8_12_add_neon(const tran_low_t * input,uint8_t * dest,int stride)41 void vpx_idct8x8_12_add_neon(const tran_low_t *input, uint8_t *dest,
42 int stride) {
43 const int16x8_t cospis = vld1q_s16(kCospi);
44 const int16x8_t cospisd = vaddq_s16(cospis, cospis);
45 const int16x4_t cospis0 = vget_low_s16(cospis); // cospi 0, 8, 16, 24
46 const int16x4_t cospisd0 = vget_low_s16(cospisd); // doubled 0, 8, 16, 24
47 const int16x4_t cospisd1 = vget_high_s16(cospisd); // doubled 4, 12, 20, 28
48 int16x4_t a[8];
49 int16x8_t b[8];
50
51 a[0] = load_tran_low_to_s16d(input);
52 a[1] = load_tran_low_to_s16d(input + 8);
53 a[2] = load_tran_low_to_s16d(input + 16);
54 a[3] = load_tran_low_to_s16d(input + 24);
55
56 idct8x8_12_pass1_bd8(cospis0, cospisd0, cospisd1, a);
57 idct8x8_12_pass2_bd8(cospis0, cospisd0, cospisd1, a, b);
58 idct8x8_add8x8_neon(b, dest, stride);
59 }
60