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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / aarch64 / mpegaudiodsp_neon.S
CommitLineData
2ba45a60
DM		 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
27const 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
32endconst
33
34.macro apply_window type, st
35function 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
701:
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
812:
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
1104:
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
1304:
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
174endfunc
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
210apply_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
226apply_window float, s
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