1 /*
2 * Copyright (c) 2024, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #include <arm_neon.h>
13 #include <assert.h>
14 #include <stdint.h>
15
16 #include "config/aom_config.h"
17 #include "config/av1_rtcd.h"
18
19 #include "aom_dsp/arm/mem_neon.h"
20 #include "aom_dsp/arm/transpose_neon.h"
21 #include "av1/common/resize.h"
22
convolve8_4(const int16x4_t s0,const int16x4_t s1,const int16x4_t s2,const int16x4_t s3,const int16x4_t s4,const int16x4_t s5,const int16x4_t s6,const int16x4_t s7,const int16x8_t filter)23 static inline uint8x8_t convolve8_4(const int16x4_t s0, const int16x4_t s1,
24 const int16x4_t s2, const int16x4_t s3,
25 const int16x4_t s4, const int16x4_t s5,
26 const int16x4_t s6, const int16x4_t s7,
27 const int16x8_t filter) {
28 const int16x4_t filter_lo = vget_low_s16(filter);
29 const int16x4_t filter_hi = vget_high_s16(filter);
30
31 int16x4_t sum = vmul_lane_s16(s0, filter_lo, 0);
32 sum = vmla_lane_s16(sum, s1, filter_lo, 1);
33 sum = vmla_lane_s16(sum, s2, filter_lo, 2);
34 sum = vmla_lane_s16(sum, s5, filter_hi, 1);
35 sum = vmla_lane_s16(sum, s6, filter_hi, 2);
36 sum = vmla_lane_s16(sum, s7, filter_hi, 3);
37 sum = vqadd_s16(sum, vmul_lane_s16(s3, filter_lo, 3));
38 sum = vqadd_s16(sum, vmul_lane_s16(s4, filter_hi, 0));
39
40 return vqrshrun_n_s16(vcombine_s16(sum, vdup_n_s16(0)), FILTER_BITS);
41 }
42
convolve8_8(const int16x8_t s0,const int16x8_t s1,const int16x8_t s2,const int16x8_t s3,const int16x8_t s4,const int16x8_t s5,const int16x8_t s6,const int16x8_t s7,const int16x8_t filter)43 static inline uint8x8_t convolve8_8(const int16x8_t s0, const int16x8_t s1,
44 const int16x8_t s2, const int16x8_t s3,
45 const int16x8_t s4, const int16x8_t s5,
46 const int16x8_t s6, const int16x8_t s7,
47 const int16x8_t filter) {
48 const int16x4_t filter_lo = vget_low_s16(filter);
49 const int16x4_t filter_hi = vget_high_s16(filter);
50
51 int16x8_t sum = vmulq_lane_s16(s0, filter_lo, 0);
52 sum = vmlaq_lane_s16(sum, s1, filter_lo, 1);
53 sum = vmlaq_lane_s16(sum, s2, filter_lo, 2);
54 sum = vmlaq_lane_s16(sum, s5, filter_hi, 1);
55 sum = vmlaq_lane_s16(sum, s6, filter_hi, 2);
56 sum = vmlaq_lane_s16(sum, s7, filter_hi, 3);
57 sum = vqaddq_s16(sum, vmulq_lane_s16(s3, filter_lo, 3));
58 sum = vqaddq_s16(sum, vmulq_lane_s16(s4, filter_hi, 0));
59
60 return vqrshrun_n_s16(sum, FILTER_BITS);
61 }
62
av1_convolve_horiz_rs_neon(const uint8_t * src,int src_stride,uint8_t * dst,int dst_stride,int w,int h,const int16_t * x_filter,int x0_qn,int x_step_qn)63 void av1_convolve_horiz_rs_neon(const uint8_t *src, int src_stride,
64 uint8_t *dst, int dst_stride, int w, int h,
65 const int16_t *x_filter, int x0_qn,
66 int x_step_qn) {
67 if ((w == 4 && h % 4 != 0) || (w % 8 == 0 && h % 8 != 0) || w % 8 != 0) {
68 av1_convolve_horiz_rs_c(src, src_stride, dst, dst_stride, w, h, x_filter,
69 x0_qn, x_step_qn);
70 return;
71 }
72
73 DECLARE_ALIGNED(16, uint8_t, temp[8 * 8]);
74
75 src -= UPSCALE_NORMATIVE_TAPS / 2 - 1;
76
77 if (w == 4) {
78 do {
79 int x_qn = x0_qn;
80
81 // Process a 4x4 tile.
82 for (int r = 0; r < 4; ++r) {
83 const uint8_t *const s = &src[x_qn >> RS_SCALE_SUBPEL_BITS];
84
85 const ptrdiff_t filter_offset =
86 UPSCALE_NORMATIVE_TAPS *
87 ((x_qn & RS_SCALE_SUBPEL_MASK) >> RS_SCALE_EXTRA_BITS);
88 const int16x8_t filter = vld1q_s16(x_filter + filter_offset);
89
90 uint8x8_t t0, t1, t2, t3;
91 load_u8_8x4(s, src_stride, &t0, &t1, &t2, &t3);
92
93 transpose_elems_inplace_u8_8x4(&t0, &t1, &t2, &t3);
94
95 int16x4_t s0 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
96 int16x4_t s1 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
97 int16x4_t s2 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
98 int16x4_t s3 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
99 int16x4_t s4 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
100 int16x4_t s5 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
101 int16x4_t s6 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
102 int16x4_t s7 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
103
104 uint8x8_t d0 = convolve8_4(s0, s1, s2, s3, s4, s5, s6, s7, filter);
105
106 store_u8_4x1(&temp[r * 4], d0);
107
108 x_qn += x_step_qn;
109 }
110
111 // Transpose the 4x4 result tile and store.
112 uint8x8_t d01 = vld1_u8(temp + 0);
113 uint8x8_t d23 = vld1_u8(temp + 8);
114
115 transpose_elems_inplace_u8_4x4(&d01, &d23);
116
117 store_u8x4_strided_x2(dst + 0 * dst_stride, 2 * dst_stride, d01);
118 store_u8x4_strided_x2(dst + 1 * dst_stride, 2 * dst_stride, d23);
119
120 dst += 4 * dst_stride;
121 src += 4 * src_stride;
122 h -= 4;
123 } while (h > 0);
124 } else {
125 do {
126 int x_qn = x0_qn;
127 uint8_t *d = dst;
128 int width = w;
129
130 do {
131 // Process an 8x8 tile.
132 for (int r = 0; r < 8; ++r) {
133 const uint8_t *const s = &src[x_qn >> RS_SCALE_SUBPEL_BITS];
134
135 const ptrdiff_t filter_offset =
136 UPSCALE_NORMATIVE_TAPS *
137 ((x_qn & RS_SCALE_SUBPEL_MASK) >> RS_SCALE_EXTRA_BITS);
138 const int16x8_t filter = vld1q_s16(x_filter + filter_offset);
139
140 uint8x8_t t0, t1, t2, t3, t4, t5, t6, t7;
141 load_u8_8x8(s, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
142
143 transpose_elems_u8_8x8(t0, t1, t2, t3, t4, t5, t6, t7, &t0, &t1, &t2,
144 &t3, &t4, &t5, &t6, &t7);
145
146 int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
147 int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
148 int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
149 int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
150 int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
151 int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
152 int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
153 int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t7));
154
155 uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
156
157 vst1_u8(&temp[r * 8], d0);
158
159 x_qn += x_step_qn;
160 }
161
162 // Transpose the 8x8 result tile and store.
163 uint8x8_t d0, d1, d2, d3, d4, d5, d6, d7;
164 load_u8_8x8(temp, 8, &d0, &d1, &d2, &d3, &d4, &d5, &d6, &d7);
165
166 transpose_elems_inplace_u8_8x8(&d0, &d1, &d2, &d3, &d4, &d5, &d6, &d7);
167
168 store_u8_8x8(d, dst_stride, d0, d1, d2, d3, d4, d5, d6, d7);
169
170 d += 8;
171 width -= 8;
172 } while (width != 0);
173
174 dst += 8 * dst_stride;
175 src += 8 * src_stride;
176 h -= 8;
177
178 } while (h > 0);
179 }
180 }
181