repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * This file is part of FFmpeg. | |
| 3 | * | |
| 4 | * FFmpeg is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU Lesser General Public | |
| 6 | * License as published by the Free Software Foundation; either | |
| 7 | * version 2.1 of the License, or (at your option) any later version. | |
| 8 | * | |
| 9 | * FFmpeg is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | * Lesser General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU Lesser General Public | |
| 15 | * License along with FFmpeg; if not, write to the Free Software | |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 17 | */ | |
| 18 | ||
| 19 | /** | |
| 20 | * @file | |
| 21 | * byte swapping routines | |
| 22 | */ | |
| 23 | ||
| 24 | #ifndef AVUTIL_X86_BSWAP_H | |
| 25 | #define AVUTIL_X86_BSWAP_H | |
| 26 | ||
| 27 | #include <stdint.h> | |
| 28 | #include "config.h" | |
| 29 | #include "libavutil/attributes.h" | |
| 30 | ||
| 31 | #if HAVE_INLINE_ASM | |
| 32 | ||
| 33 | #if !AV_GCC_VERSION_AT_LEAST(4,1) | |
| 34 | #define av_bswap16 av_bswap16 | |
| 35 | static av_always_inline av_const unsigned av_bswap16(unsigned x) | |
| 36 | { | |
| 37 | __asm__("rorw $8, %w0" : "+r"(x)); | |
| 38 | return x; | |
| 39 | } | |
| 40 | #endif /* !AV_GCC_VERSION_AT_LEAST(4,1) */ | |
| 41 | ||
| 42 | #if !AV_GCC_VERSION_AT_LEAST(4,5) | |
| 43 | #define av_bswap32 av_bswap32 | |
| 44 | static av_always_inline av_const uint32_t av_bswap32(uint32_t x) | |
| 45 | { | |
| 46 | __asm__("bswap %0" : "+r" (x)); | |
| 47 | return x; | |
| 48 | } | |
| 49 | ||
| 50 | #if ARCH_X86_64 | |
| 51 | #define av_bswap64 av_bswap64 | |
| 52 | static inline uint64_t av_const av_bswap64(uint64_t x) | |
| 53 | { | |
| 54 | __asm__("bswap %0": "=r" (x) : "0" (x)); | |
| 55 | return x; | |
| 56 | } | |
| 57 | #endif | |
| 58 | #endif /* !AV_GCC_VERSION_AT_LEAST(4,5) */ | |
| 59 | ||
| 60 | #endif /* HAVE_INLINE_ASM */ | |
| 61 | #endif /* AVUTIL_X86_BSWAP_H */ |