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dca.h
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1 /*
2  * Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
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 #ifndef AVCODEC_ARM_DCA_H
22 #define AVCODEC_ARM_DCA_H
23 
24 #include <stdint.h>
25 
26 #include "config.h"
27 #include "libavcodec/mathops.h"
28 
29 #if HAVE_ARMV6_INLINE && AV_GCC_VERSION_AT_LEAST(4,4) && !CONFIG_THUMB
30 
31 #define decode_blockcodes decode_blockcodes
32 static inline int decode_blockcodes(int code1, int code2, int levels,
33  int32_t *values)
34 {
35  int32_t v0, v1, v2, v3, v4, v5;
36 
37  __asm__ ("smmul %0, %6, %10 \n"
38  "smmul %3, %7, %10 \n"
39  "smlabb %6, %0, %9, %6 \n"
40  "smlabb %7, %3, %9, %7 \n"
41  "smmul %1, %0, %10 \n"
42  "smmul %4, %3, %10 \n"
43  "sub %6, %6, %8, lsr #1 \n"
44  "sub %7, %7, %8, lsr #1 \n"
45  "smlabb %0, %1, %9, %0 \n"
46  "smlabb %3, %4, %9, %3 \n"
47  "smmul %2, %1, %10 \n"
48  "smmul %5, %4, %10 \n"
49  "str %6, [%11, #0] \n"
50  "str %7, [%11, #16] \n"
51  "sub %0, %0, %8, lsr #1 \n"
52  "sub %3, %3, %8, lsr #1 \n"
53  "smlabb %1, %2, %9, %1 \n"
54  "smlabb %4, %5, %9, %4 \n"
55  "smmul %6, %2, %10 \n"
56  "smmul %7, %5, %10 \n"
57  "str %0, [%11, #4] \n"
58  "str %3, [%11, #20] \n"
59  "sub %1, %1, %8, lsr #1 \n"
60  "sub %4, %4, %8, lsr #1 \n"
61  "smlabb %2, %6, %9, %2 \n"
62  "smlabb %5, %7, %9, %5 \n"
63  "str %1, [%11, #8] \n"
64  "str %4, [%11, #24] \n"
65  "sub %2, %2, %8, lsr #1 \n"
66  "sub %5, %5, %8, lsr #1 \n"
67  "str %2, [%11, #12] \n"
68  "str %5, [%11, #28] \n"
69  : "=&r"(v0), "=&r"(v1), "=&r"(v2),
70  "=&r"(v3), "=&r"(v4), "=&r"(v5),
71  "+&r"(code1), "+&r"(code2)
72  : "r"(levels - 1), "r"(-levels),
73  "r"(ff_inverse[levels]), "r"(values)
74  : "memory");
75 
76  return code1 | code2;
77 }
78 
79 #endif
80 
81 #endif /* AVCODEC_ARM_DCA_H */
static int decode_blockcodes(int code1, int code2, int levels, int32_t *audio)
Definition: dca_core.c:608
GLfloat v0
Definition: opengl_enc.c:107
const uint32_t ff_inverse[257]
Definition: mathtables.c:27
int32_t