1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/*
* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/arm/asm.S"
function ff_ac3_max_msb_abs_int16_neon, export=1
vmov.i16 q0, #0
vmov.i16 q2, #0
1: vld1.16 {q1}, [r0,:128]!
vabs.s16 q1, q1
vld1.16 {q3}, [r0,:128]!
vabs.s16 q3, q3
vorr q0, q0, q1
vorr q2, q2, q3
subs r1, r1, #16
bgt 1b
vorr q0, q0, q2
vorr d0, d0, d1
vpmax.u16 d0, d0, d0
vpmax.u16 d0, d0, d0
vmov.u16 r0, d0[0]
bx lr
endfunc
function ff_ac3_exponent_min_neon, export=1
cmp r1, #0
it eq
bxeq lr
push {lr}
mov r12, #256
1:
vld1.8 {q0}, [r0,:128]
mov lr, r1
add r3, r0, #256
2: vld1.8 {q1}, [r3,:128], r12
subs lr, lr, #1
vmin.u8 q0, q0, q1
bgt 2b
subs r2, r2, #16
vst1.8 {q0}, [r0,:128]!
bgt 1b
pop {pc}
endfunc
function ff_ac3_lshift_int16_neon, export=1
vdup.16 q0, r2
1: vld1.16 {q1}, [r0,:128]
vshl.s16 q1, q1, q0
vst1.16 {q1}, [r0,:128]!
subs r1, r1, #8
bgt 1b
bx lr
endfunc
function ff_ac3_rshift_int32_neon, export=1
rsb r2, r2, #0
vdup.32 q0, r2
1: vld1.32 {q1}, [r0,:128]
vshl.s32 q1, q1, q0
vst1.32 {q1}, [r0,:128]!
subs r1, r1, #4
bgt 1b
bx lr
endfunc
function ff_float_to_fixed24_neon, export=1
1: vld1.32 {q0-q1}, [r1,:128]!
vcvt.s32.f32 q0, q0, #24
vld1.32 {q2-q3}, [r1,:128]!
vcvt.s32.f32 q1, q1, #24
vcvt.s32.f32 q2, q2, #24
vst1.32 {q0-q1}, [r0,:128]!
vcvt.s32.f32 q3, q3, #24
vst1.32 {q2-q3}, [r0,:128]!
subs r2, r2, #16
bgt 1b
bx lr
endfunc
function ff_ac3_extract_exponents_neon, export=1
vmov.i32 q15, #8
1:
vld1.32 {q0}, [r1,:128]!
vabs.s32 q1, q0
vclz.i32 q3, q1
vsub.i32 q3, q3, q15
vmovn.i32 d6, q3
vmovn.i16 d6, q3
vst1.32 {d6[0]}, [r0,:32]!
subs r2, r2, #4
bgt 1b
bx lr
endfunc
function ff_apply_window_int16_neon, export=1
push {r4,lr}
add r4, r1, r3, lsl #1
add lr, r0, r3, lsl #1
sub r4, r4, #16
sub lr, lr, #16
mov r12, #-16
1:
vld1.16 {q0}, [r1,:128]!
vld1.16 {q2}, [r2,:128]!
vld1.16 {q1}, [r4,:128], r12
vrev64.16 q3, q2
vqrdmulh.s16 q0, q0, q2
vqrdmulh.s16 d2, d2, d7
vqrdmulh.s16 d3, d3, d6
vst1.16 {q0}, [r0,:128]!
vst1.16 {q1}, [lr,:128], r12
subs r3, r3, #16
bgt 1b
pop {r4,pc}
endfunc
|
