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 | #ifndef AVUTIL_ARM_BSWAP_H | |
| 20 | #define AVUTIL_ARM_BSWAP_H | |
| 21 | ||
| 22 | #include <stdint.h> | |
| 23 | #include "config.h" | |
| 24 | #include "libavutil/attributes.h" | |
| 25 | ||
| 26 | #ifdef __ARMCC_VERSION | |
| 27 | ||
| 28 | #if HAVE_ARMV6 | |
| 29 | #define av_bswap32 av_bswap32 | |
| 30 | static av_always_inline av_const uint32_t av_bswap32(uint32_t x) | |
| 31 | { | |
| 32 | return __rev(x); | |
| 33 | } | |
| 34 | #endif /* HAVE_ARMV6 */ | |
| 35 | ||
| 36 | #elif HAVE_INLINE_ASM | |
| 37 | ||
| 38 | #if HAVE_ARMV6_INLINE | |
| 39 | #define av_bswap16 av_bswap16 | |
| 40 | static av_always_inline av_const unsigned av_bswap16(unsigned x) | |
| 41 | { | |
| 42 | __asm__("rev16 %0, %0" : "+r"(x)); | |
| 43 | return x; | |
| 44 | } | |
| 45 | #endif | |
| 46 | ||
| 47 | #if !AV_GCC_VERSION_AT_LEAST(4,5) | |
| 48 | #define av_bswap32 av_bswap32 | |
| 49 | static av_always_inline av_const uint32_t av_bswap32(uint32_t x) | |
| 50 | { | |
| 51 | #if HAVE_ARMV6_INLINE | |
| 52 | __asm__("rev %0, %0" : "+r"(x)); | |
| 53 | #else | |
| 54 | uint32_t t; | |
| 55 | __asm__ ("eor %1, %0, %0, ror #16 \n\t" | |
| 56 | "bic %1, %1, #0xFF0000 \n\t" | |
| 57 | "mov %0, %0, ror #8 \n\t" | |
| 58 | "eor %0, %0, %1, lsr #8 \n\t" | |
| 59 | : "+r"(x), "=&r"(t)); | |
| 60 | #endif /* HAVE_ARMV6_INLINE */ | |
| 61 | return x; | |
| 62 | } | |
| 63 | #endif /* !AV_GCC_VERSION_AT_LEAST(4,5) */ | |
| 64 | ||
| 65 | #endif /* __ARMCC_VERSION */ | |
| 66 | ||
| 67 | #endif /* AVUTIL_ARM_BSWAP_H */ |