1 /*
2 * Copyright (c) 2017 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 "./vpx_dsp_rtcd.h"
12 #include "vpx_dsp/ppc/types_vsx.h"
13 #include "vpx_dsp/ppc/transpose_vsx.h"
14 #include "vpx_dsp/ppc/bitdepth_conversion_vsx.h"
15
vpx_hadamard_s16_8x8_one_pass(int16x8_t v[8])16 static void vpx_hadamard_s16_8x8_one_pass(int16x8_t v[8]) {
17 const int16x8_t b0 = vec_add(v[0], v[1]);
18 const int16x8_t b1 = vec_sub(v[0], v[1]);
19 const int16x8_t b2 = vec_add(v[2], v[3]);
20 const int16x8_t b3 = vec_sub(v[2], v[3]);
21 const int16x8_t b4 = vec_add(v[4], v[5]);
22 const int16x8_t b5 = vec_sub(v[4], v[5]);
23 const int16x8_t b6 = vec_add(v[6], v[7]);
24 const int16x8_t b7 = vec_sub(v[6], v[7]);
25
26 const int16x8_t c0 = vec_add(b0, b2);
27 const int16x8_t c1 = vec_add(b1, b3);
28 const int16x8_t c2 = vec_sub(b0, b2);
29 const int16x8_t c3 = vec_sub(b1, b3);
30 const int16x8_t c4 = vec_add(b4, b6);
31 const int16x8_t c5 = vec_add(b5, b7);
32 const int16x8_t c6 = vec_sub(b4, b6);
33 const int16x8_t c7 = vec_sub(b5, b7);
34
35 v[0] = vec_add(c0, c4);
36 v[1] = vec_sub(c2, c6);
37 v[2] = vec_sub(c0, c4);
38 v[3] = vec_add(c2, c6);
39 v[4] = vec_add(c3, c7);
40 v[5] = vec_sub(c3, c7);
41 v[6] = vec_sub(c1, c5);
42 v[7] = vec_add(c1, c5);
43 }
44
vpx_hadamard_8x8_vsx(const int16_t * src_diff,ptrdiff_t src_stride,tran_low_t * coeff)45 void vpx_hadamard_8x8_vsx(const int16_t *src_diff, ptrdiff_t src_stride,
46 tran_low_t *coeff) {
47 int16x8_t v[8];
48
49 v[0] = vec_vsx_ld(0, src_diff);
50 v[1] = vec_vsx_ld(0, src_diff + src_stride);
51 v[2] = vec_vsx_ld(0, src_diff + (2 * src_stride));
52 v[3] = vec_vsx_ld(0, src_diff + (3 * src_stride));
53 v[4] = vec_vsx_ld(0, src_diff + (4 * src_stride));
54 v[5] = vec_vsx_ld(0, src_diff + (5 * src_stride));
55 v[6] = vec_vsx_ld(0, src_diff + (6 * src_stride));
56 v[7] = vec_vsx_ld(0, src_diff + (7 * src_stride));
57
58 vpx_hadamard_s16_8x8_one_pass(v);
59
60 vpx_transpose_s16_8x8(v);
61
62 vpx_hadamard_s16_8x8_one_pass(v);
63
64 store_tran_low(v[0], 0, coeff);
65 store_tran_low(v[1], 0, coeff + 8);
66 store_tran_low(v[2], 0, coeff + 16);
67 store_tran_low(v[3], 0, coeff + 24);
68 store_tran_low(v[4], 0, coeff + 32);
69 store_tran_low(v[5], 0, coeff + 40);
70 store_tran_low(v[6], 0, coeff + 48);
71 store_tran_low(v[7], 0, coeff + 56);
72 }
73
vpx_hadamard_16x16_vsx(const int16_t * src_diff,ptrdiff_t src_stride,tran_low_t * coeff)74 void vpx_hadamard_16x16_vsx(const int16_t *src_diff, ptrdiff_t src_stride,
75 tran_low_t *coeff) {
76 int i;
77 const uint16x8_t ones = vec_splat_u16(1);
78
79 /* Rearrange 16x16 to 8x32 and remove stride.
80 * Top left first. */
81 vpx_hadamard_8x8_vsx(src_diff, src_stride, coeff);
82 /* Top right. */
83 vpx_hadamard_8x8_vsx(src_diff + 8 + 0 * src_stride, src_stride, coeff + 64);
84 /* Bottom left. */
85 vpx_hadamard_8x8_vsx(src_diff + 0 + 8 * src_stride, src_stride, coeff + 128);
86 /* Bottom right. */
87 vpx_hadamard_8x8_vsx(src_diff + 8 + 8 * src_stride, src_stride, coeff + 192);
88
89 /* Overlay the 8x8 blocks and combine. */
90 for (i = 0; i < 64; i += 8) {
91 const int16x8_t a0 = load_tran_low(0, coeff);
92 const int16x8_t a1 = load_tran_low(0, coeff + 64);
93 const int16x8_t a2 = load_tran_low(0, coeff + 128);
94 const int16x8_t a3 = load_tran_low(0, coeff + 192);
95
96 /* Prevent the result from escaping int16_t. */
97 const int16x8_t b0 = vec_sra(a0, ones);
98 const int16x8_t b1 = vec_sra(a1, ones);
99 const int16x8_t b2 = vec_sra(a2, ones);
100 const int16x8_t b3 = vec_sra(a3, ones);
101
102 const int16x8_t c0 = vec_add(b0, b1);
103 const int16x8_t c2 = vec_add(b2, b3);
104 const int16x8_t c1 = vec_sub(b0, b1);
105 const int16x8_t c3 = vec_sub(b2, b3);
106
107 const int16x8_t d0 = vec_add(c0, c2);
108 const int16x8_t d1 = vec_add(c1, c3);
109 const int16x8_t d2 = vec_sub(c0, c2);
110 const int16x8_t d3 = vec_sub(c1, c3);
111
112 store_tran_low(d0, 0, coeff);
113 store_tran_low(d1, 0, coeff + 64);
114 store_tran_low(d2, 0, coeff + 128);
115 store_tran_low(d3, 0, coeff + 192);
116
117 coeff += 8;
118 }
119 }
120