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 "./vp8_rtcd.h"
14 #include "vpx_ports/arm.h"
15
16 #ifdef VPX_INCOMPATIBLE_GCC
17 #include "./vp8_rtcd.h"
vp8_short_walsh4x4_neon(int16_t * input,int16_t * output,int pitch)18 void vp8_short_walsh4x4_neon(int16_t *input, int16_t *output, int pitch) {
19 vp8_short_walsh4x4_c(input, output, pitch);
20 }
21 #else
vp8_short_walsh4x4_neon(int16_t * input,int16_t * output,int pitch)22 void vp8_short_walsh4x4_neon(int16_t *input, int16_t *output, int pitch) {
23 uint16x4_t d16u16;
24 int16x8_t q0s16, q1s16;
25 int16x4_t dEmptys16, d0s16, d1s16, d2s16, d3s16, d4s16, d5s16, d6s16, d7s16;
26 int32x4_t qEmptys32, q0s32, q1s32, q2s32, q3s32, q8s32;
27 int32x4_t q9s32, q10s32, q11s32, q15s32;
28 uint32x4_t q8u32, q9u32, q10u32, q11u32;
29 int16x4x2_t v2tmp0, v2tmp1;
30 int32x2x2_t v2tmp2, v2tmp3;
31
32 dEmptys16 = vdup_n_s16(0);
33 qEmptys32 = vdupq_n_s32(0);
34 q15s32 = vdupq_n_s32(3);
35
36 d0s16 = vld1_s16(input);
37 input += pitch / 2;
38 d1s16 = vld1_s16(input);
39 input += pitch / 2;
40 d2s16 = vld1_s16(input);
41 input += pitch / 2;
42 d3s16 = vld1_s16(input);
43
44 v2tmp2 = vtrn_s32(vreinterpret_s32_s16(d0s16), vreinterpret_s32_s16(d2s16));
45 v2tmp3 = vtrn_s32(vreinterpret_s32_s16(d1s16), vreinterpret_s32_s16(d3s16));
46 v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[0]), // d0
47 vreinterpret_s16_s32(v2tmp3.val[0])); // d1
48 v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp2.val[1]), // d2
49 vreinterpret_s16_s32(v2tmp3.val[1])); // d3
50
51 d4s16 = vadd_s16(v2tmp0.val[0], v2tmp1.val[0]);
52 d5s16 = vadd_s16(v2tmp0.val[1], v2tmp1.val[1]);
53 d6s16 = vsub_s16(v2tmp0.val[1], v2tmp1.val[1]);
54 d7s16 = vsub_s16(v2tmp0.val[0], v2tmp1.val[0]);
55
56 d4s16 = vshl_n_s16(d4s16, 2);
57 d5s16 = vshl_n_s16(d5s16, 2);
58 d6s16 = vshl_n_s16(d6s16, 2);
59 d7s16 = vshl_n_s16(d7s16, 2);
60
61 d16u16 = vceq_s16(d4s16, dEmptys16);
62 d16u16 = vmvn_u16(d16u16);
63
64 d0s16 = vadd_s16(d4s16, d5s16);
65 d3s16 = vsub_s16(d4s16, d5s16);
66 d1s16 = vadd_s16(d7s16, d6s16);
67 d2s16 = vsub_s16(d7s16, d6s16);
68
69 d0s16 = vsub_s16(d0s16, vreinterpret_s16_u16(d16u16));
70
71 // Second for-loop
72 v2tmp2 = vtrn_s32(vreinterpret_s32_s16(d1s16), vreinterpret_s32_s16(d3s16));
73 v2tmp3 = vtrn_s32(vreinterpret_s32_s16(d0s16), vreinterpret_s32_s16(d2s16));
74 v2tmp0 = vtrn_s16(vreinterpret_s16_s32(v2tmp3.val[1]), // d2
75 vreinterpret_s16_s32(v2tmp2.val[1])); // d3
76 v2tmp1 = vtrn_s16(vreinterpret_s16_s32(v2tmp3.val[0]), // d0
77 vreinterpret_s16_s32(v2tmp2.val[0])); // d1
78
79 q8s32 = vaddl_s16(v2tmp1.val[0], v2tmp0.val[0]);
80 q9s32 = vaddl_s16(v2tmp1.val[1], v2tmp0.val[1]);
81 q10s32 = vsubl_s16(v2tmp1.val[1], v2tmp0.val[1]);
82 q11s32 = vsubl_s16(v2tmp1.val[0], v2tmp0.val[0]);
83
84 q0s32 = vaddq_s32(q8s32, q9s32);
85 q1s32 = vaddq_s32(q11s32, q10s32);
86 q2s32 = vsubq_s32(q11s32, q10s32);
87 q3s32 = vsubq_s32(q8s32, q9s32);
88
89 q8u32 = vcltq_s32(q0s32, qEmptys32);
90 q9u32 = vcltq_s32(q1s32, qEmptys32);
91 q10u32 = vcltq_s32(q2s32, qEmptys32);
92 q11u32 = vcltq_s32(q3s32, qEmptys32);
93
94 q8s32 = vreinterpretq_s32_u32(q8u32);
95 q9s32 = vreinterpretq_s32_u32(q9u32);
96 q10s32 = vreinterpretq_s32_u32(q10u32);
97 q11s32 = vreinterpretq_s32_u32(q11u32);
98
99 q0s32 = vsubq_s32(q0s32, q8s32);
100 q1s32 = vsubq_s32(q1s32, q9s32);
101 q2s32 = vsubq_s32(q2s32, q10s32);
102 q3s32 = vsubq_s32(q3s32, q11s32);
103
104 q8s32 = vaddq_s32(q0s32, q15s32);
105 q9s32 = vaddq_s32(q1s32, q15s32);
106 q10s32 = vaddq_s32(q2s32, q15s32);
107 q11s32 = vaddq_s32(q3s32, q15s32);
108
109 d0s16 = vshrn_n_s32(q8s32, 3);
110 d1s16 = vshrn_n_s32(q9s32, 3);
111 d2s16 = vshrn_n_s32(q10s32, 3);
112 d3s16 = vshrn_n_s32(q11s32, 3);
113
114 q0s16 = vcombine_s16(d0s16, d1s16);
115 q1s16 = vcombine_s16(d2s16, d3s16);
116
117 vst1q_s16(output, q0s16);
118 vst1q_s16(output + 8, q1s16);
119 return;
120 }
121 #endif // VPX_INCOMPATIBLE_GCC
122