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1 | /* |
2 | * Copyright (c) 2014 Janne Grunau <janne-libav@jannau.net> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "libavutil/aarch64/asm.S" | |
22 | ||
23 | #define FRAC_BITS 23 // fractional bits for sb_samples and dct | |
24 | #define WFRAC_BITS 16 // fractional bits for window | |
25 | #define OUT_SHIFT (WFRAC_BITS + FRAC_BITS - 15) | |
26 | ||
27 | const tbl_rev128.s, align=4 | |
28 | .byte 12, 13, 14, 15 | |
29 | .byte 8, 9, 10, 11 | |
30 | .byte 4, 5, 6, 7 | |
31 | .byte 0, 1, 2, 3 | |
32 | endconst | |
33 | ||
34 | .macro apply_window type, st | |
35 | function ff_mpadsp_apply_window_\type\()_neon, export=1 | |
36 | mov x7, x0 | |
37 | sxtw x4, w4 // incr | |
38 | add x8, x0, #512<<2 | |
39 | ld1 {v0.4s,v1.4s,v2.4s,v3.4s}, [x7], #64 | |
40 | ld1 {v4.4s,v5.4s,v6.4s,v7.4s}, [x7], #64 | |
41 | st1 {v0.4s,v1.4s,v2.4s,v3.4s}, [x8], #64 | |
42 | st1 {v4.4s,v5.4s,v6.4s,v7.4s}, [x8], #64 | |
43 | movrel x15, tbl_rev128.s | |
44 | ld1 {v27.4s}, [x15] | |
45 | .ifc \type, fixed | |
46 | lsl x4, x4, #1 | |
47 | .else | |
48 | lsl x4, x4, #2 | |
49 | .endif | |
50 | add x10, x0, #45<<2 | |
51 | add x0, x0, #16<<2 | |
52 | add x1, x1, #16<<2 | |
53 | add x5, x3, x4, lsl #5 | |
54 | sub x5, x5, x4 // samples2 | |
55 | neg x13, x4 // -incr | |
56 | mov x9, #64<<2 | |
57 | .ifc \type, fixed | |
58 | ld1r {v16.2s}, [x2] // dither_state | |
59 | sxtl v16.2d, v16.2s | |
60 | movi v29.2d, #0 | |
61 | movi v30.2d, #(1<<OUT_SHIFT)-1 | |
62 | trn1 v31.2d, v29.2d, v30.2d | |
63 | trn2 v30.2d, v30.2d, v29.2d | |
64 | trn1 v16.2d, v16.2d, v29.2d | |
65 | .else | |
66 | movi v16.4s, #0 | |
67 | movi v28.4s, #0 | |
68 | .endif | |
69 | mov x14, #4 | |
70 | 1: | |
71 | mov x8, x0 | |
72 | sub x7, x1, #3<<2 | |
73 | sub x6, x1, x14, lsl #4 | |
74 | add x7, x7, x14, lsl #4 | |
75 | add x11, x6, #(32)<<2 // w + 32 | |
76 | add x12, x7, #(32)<<2 // w2 + 32 | |
77 | mov x15, #8 | |
78 | movi v17.2d, #0 | |
79 | movi v18.2d, #0 | |
80 | movi v19.2d, #0 | |
81 | 2: | |
82 | subs x15, x15, #1 | |
83 | ld1 {v0.4s}, [x8], x9 | |
84 | ld1 {v1.4s}, [x10], x9 | |
85 | ld1 {v2.4s}, [x6], x9 | |
86 | ld1 {v3.4s}, [x7], x9 | |
87 | tbl v6.16b, {v0.16b}, v27.16b | |
88 | tbl v7.16b, {v1.16b}, v27.16b | |
89 | ld1 {v4.4s}, [x11], x9 | |
90 | ld1 {v5.4s}, [x12], x9 | |
91 | MLA v16, v2, v0 | |
92 | MLA2 v17, v2, v0 | |
93 | MLS v18, v3, v6 | |
94 | MLS2 v19, v3, v6 | |
95 | MLS v16, v4, v7 | |
96 | MLS2 v17, v4, v7 | |
97 | MLS v18, v5, v1 | |
98 | MLS2 v19, v5, v1 | |
99 | b.gt 2b | |
100 | ||
101 | cmp x14, #4 | |
102 | sub x10, x10, #64<<5 // 64 * 8 * sizeof(int32_t) | |
103 | ||
104 | .ifc \type, fixed | |
105 | and v28.16b, v16.16b, v30.16b | |
106 | ext v28.16b, v29.16b, v28.16b, #8 | |
107 | ||
108 | b.eq 4f | |
109 | round_sample v19, 1, 1 | |
110 | 4: | |
111 | round_sample v16, 1, 0 | |
112 | shrn v16.2s, v16.2d, #OUT_SHIFT | |
113 | round_sample v19, 0, 0 | |
114 | shrn v19.2s, v19.2d, #OUT_SHIFT | |
115 | round_sample v17, 0, 1 | |
116 | round_sample v18, 1, 1 | |
117 | round_sample v17, 1, 0 | |
118 | shrn2 v16.4s, v17.2d, #OUT_SHIFT | |
119 | round_sample v18, 0, 0 | |
120 | shrn2 v19.4s, v18.2d, #OUT_SHIFT | |
121 | sqxtn v16.4h, v16.4s | |
122 | sqxtn v18.4h, v19.4s | |
123 | .else | |
124 | ext v18.16b, v18.16b, v18.16b, #8 | |
125 | .endif | |
126 | ||
127 | st1 {v16.\st\()}[0], [x3], x4 | |
128 | b.eq 4f | |
129 | st1 {v18.\st\()}[1], [x5], x13 | |
130 | 4: | |
131 | st1 {v16.\st\()}[1], [x3], x4 | |
132 | st1 {v18.\st\()}[0], [x5], x13 | |
133 | st1 {v16.\st\()}[2], [x3], x4 | |
134 | st1 {v18.\st\()}[3], [x5], x13 | |
135 | st1 {v16.\st\()}[3], [x3], x4 | |
136 | st1 {v18.\st\()}[2], [x5], x13 | |
137 | ||
138 | mov v16.16b, v28.16b | |
139 | ||
140 | subs x14, x14, #1 | |
141 | add x0, x0, #4<<2 | |
142 | sub x10, x10, #4<<2 | |
143 | b.gt 1b | |
144 | ||
145 | // comuting samples[16] | |
146 | add x6, x1, #32<<2 | |
147 | ld1 {v0.2s}, [x6], x9 | |
148 | ld1 {v1.2s}, [x0], x9 | |
149 | .rept 3 | |
150 | ld1 {v2.2s}, [x6], x9 | |
151 | ld1 {v3.2s}, [x0], x9 | |
152 | MLS v16, v0, v1 | |
153 | ld1 {v0.2s}, [x6], x9 | |
154 | ld1 {v1.2s}, [x0], x9 | |
155 | MLS v16, v2, v3 | |
156 | .endr | |
157 | ld1 {v2.2s}, [x6], x9 | |
158 | ld1 {v3.2s}, [x0], x9 | |
159 | MLS v16, v0, v1 | |
160 | MLS v16, v2, v3 | |
161 | ||
162 | .ifc \type, fixed | |
163 | and v28.16b, v16.16b, v30.16b | |
164 | shrn v20.2s, v16.2d, #OUT_SHIFT | |
165 | xtn v28.2s, v28.2d | |
166 | sqxtn v20.4h, v20.4s | |
167 | st1 {v28.s}[0], [x2] // save dither_state | |
168 | st1 {v20.h}[0], [x3] | |
169 | .else | |
170 | st1 {v16.s}[0], [x3] | |
171 | .endif | |
172 | ||
173 | ret | |
174 | endfunc | |
175 | .purgem round_sample | |
176 | .purgem MLA | |
177 | .purgem MLA2 | |
178 | .purgem MLS | |
179 | .purgem MLS2 | |
180 | .endm | |
181 | ||
182 | ||
183 | .macro round_sample r, idx, next | |
184 | add \r\().2d, \r\().2d, v28.2d | |
185 | .if \idx == 0 | |
186 | and v28.16b, \r\().16b, v30.16b | |
187 | .else // \idx == 1 | |
188 | and v28.16b, \r\().16b, v31.16b | |
189 | .endif | |
190 | .if \idx != \next | |
191 | .if \next == 0 | |
192 | ext v28.16b, v28.16b, v29.16b, #8 | |
193 | .else | |
194 | ext v28.16b, v29.16b, v28.16b, #8 | |
195 | .endif | |
196 | .endif | |
197 | .endm | |
198 | .macro MLA d, s1, s2 | |
199 | smlal \d\().2d, \s1\().2s, \s2\().2s | |
200 | .endm | |
201 | .macro MLA2 d, s1, s2 | |
202 | smlal2 \d\().2d, \s1\().4s, \s2\().4s | |
203 | .endm | |
204 | .macro MLS d, s1, s2 | |
205 | smlsl \d\().2d, \s1\().2s, \s2\().2s | |
206 | .endm | |
207 | .macro MLS2 d, s1, s2 | |
208 | smlsl2 \d\().2d, \s1\().4s, \s2\().4s | |
209 | .endm | |
210 | apply_window fixed, h | |
211 | ||
212 | ||
213 | // nothing to do for round_sample and ML{A,S}2 | |
214 | .macro round_sample r, idx, next | |
215 | .endm | |
216 | .macro MLA2 d, s1, s2 | |
217 | .endm | |
218 | .macro MLS2 d, s1, s2 | |
219 | .endm | |
220 | .macro MLA d, s1, s2 | |
221 | fmla \d\().4s, \s1\().4s, \s2\().4s | |
222 | .endm | |
223 | .macro MLS d, s1, s2 | |
224 | fmls \d\().4s, \s1\().4s, \s2\().4s | |
225 | .endm | |
226 | apply_window float, s |