| rev |
line source |
|
nengel@2
|
1 /*
|
|
nengel@2
|
2 * This file is part of FFmpeg.
|
|
nengel@2
|
3 *
|
|
nengel@2
|
4 * FFmpeg is free software; you can redistribute it and/or
|
|
nengel@2
|
5 * modify it under the terms of the GNU Lesser General Public
|
|
nengel@2
|
6 * License as published by the Free Software Foundation; either
|
|
nengel@2
|
7 * version 2.1 of the License, or (at your option) any later version.
|
|
nengel@2
|
8 *
|
|
nengel@2
|
9 * FFmpeg is distributed in the hope that it will be useful,
|
|
nengel@2
|
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
nengel@2
|
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
nengel@2
|
12 * Lesser General Public License for more details.
|
|
nengel@2
|
13 *
|
|
nengel@2
|
14 * You should have received a copy of the GNU Lesser General Public
|
|
nengel@2
|
15 * License along with FFmpeg; if not, write to the Free Software
|
|
nengel@2
|
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
nengel@2
|
17 */
|
|
nengel@2
|
18
|
|
nengel@2
|
19 #ifndef AVUTIL_ARM_BSWAP_H
|
|
nengel@2
|
20 #define AVUTIL_ARM_BSWAP_H
|
|
nengel@2
|
21
|
|
nengel@2
|
22 #include <stdint.h>
|
|
nengel@2
|
23 #include "config.h"
|
|
nengel@2
|
24 #include "libavutil/attributes.h"
|
|
nengel@2
|
25
|
|
nengel@2
|
26 #ifdef __ARMCC_VERSION
|
|
nengel@2
|
27
|
|
nengel@2
|
28 #if HAVE_ARMV6
|
|
nengel@2
|
29 #define bswap_16 bswap_16
|
|
nengel@2
|
30 static av_always_inline av_const unsigned bswap_16(unsigned x)
|
|
nengel@2
|
31 {
|
|
nengel@2
|
32 __asm { rev16 x, x }
|
|
nengel@2
|
33 return x;
|
|
nengel@2
|
34 }
|
|
nengel@2
|
35
|
|
nengel@2
|
36 #define bswap_32 bswap_32
|
|
nengel@2
|
37 static av_always_inline av_const uint32_t bswap_32(uint32_t x)
|
|
nengel@2
|
38 {
|
|
nengel@2
|
39 return __rev(x);
|
|
nengel@2
|
40 }
|
|
nengel@2
|
41 #endif /* HAVE_ARMV6 */
|
|
nengel@2
|
42
|
|
nengel@2
|
43 #elif HAVE_INLINE_ASM
|
|
nengel@2
|
44
|
|
nengel@2
|
45 #if HAVE_ARMV6
|
|
nengel@2
|
46 #define bswap_16 bswap_16
|
|
nengel@2
|
47 static av_always_inline av_const unsigned bswap_16(unsigned x)
|
|
nengel@2
|
48 {
|
|
nengel@2
|
49 __asm__("rev16 %0, %0" : "+r"(x));
|
|
nengel@2
|
50 return x;
|
|
nengel@2
|
51 }
|
|
nengel@2
|
52 #endif
|
|
nengel@2
|
53
|
|
nengel@2
|
54 #define bswap_32 bswap_32
|
|
nengel@2
|
55 static av_always_inline av_const uint32_t bswap_32(uint32_t x)
|
|
nengel@2
|
56 {
|
|
nengel@2
|
57 #if HAVE_ARMV6
|
|
nengel@2
|
58 __asm__("rev %0, %0" : "+r"(x));
|
|
nengel@2
|
59 #else
|
|
nengel@2
|
60 uint32_t t;
|
|
nengel@2
|
61 __asm__ ("eor %1, %0, %0, ror #16 \n\t"
|
|
nengel@2
|
62 "bic %1, %1, #0xFF0000 \n\t"
|
|
nengel@2
|
63 "mov %0, %0, ror #8 \n\t"
|
|
nengel@2
|
64 "eor %0, %0, %1, lsr #8 \n\t"
|
|
nengel@2
|
65 : "+r"(x), "=&r"(t));
|
|
nengel@2
|
66 #endif /* HAVE_ARMV6 */
|
|
nengel@2
|
67 return x;
|
|
nengel@2
|
68 }
|
|
nengel@2
|
69
|
|
nengel@2
|
70 #endif /* __ARMCC_VERSION */
|
|
nengel@2
|
71
|
|
nengel@2
|
72 #endif /* AVUTIL_ARM_BSWAP_H */
|
