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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * This file is part of FFmpeg. |
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| 3 | * |
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| 4 | * FFmpeg is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Lesser General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2.1 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * FFmpeg is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Lesser General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Lesser General Public |
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| 15 | * License along with FFmpeg; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 17 | */ |
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| 18 | |||
| 19 | /** |
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| 20 | * @file |
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| 21 | * byte swapping routines |
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| 22 | */ |
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| 23 | |||
| 24 | #ifndef AVUTIL_X86_BSWAP_H |
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| 25 | #define AVUTIL_X86_BSWAP_H |
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| 26 | |||
| 27 | #include |
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| 28 | #include "config.h" |
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| 29 | #include "libavutil/attributes.h" |
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| 30 | |||
| 31 | #if HAVE_INLINE_ASM |
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| 32 | |||
| 33 | #if !AV_GCC_VERSION_AT_LEAST(4,1) |
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| 34 | #define av_bswap16 av_bswap16 |
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| 35 | static av_always_inline av_const unsigned av_bswap16(unsigned x) |
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| 36 | { |
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| 37 | __asm__("rorw $8, %w0" : "+r"(x)); |
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| 38 | return x; |
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| 39 | } |
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| 40 | #endif /* !AV_GCC_VERSION_AT_LEAST(4,1) */ |
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| 41 | |||
| 42 | #if !AV_GCC_VERSION_AT_LEAST(4,5) |
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| 43 | #define av_bswap32 av_bswap32 |
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| 44 | static av_always_inline av_const uint32_t av_bswap32(uint32_t x) |
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| 45 | { |
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| 46 | __asm__("bswap %0" : "+r" (x)); |
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| 47 | return x; |
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| 48 | } |
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| 49 | |||
| 50 | #if ARCH_X86_64 |
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| 51 | #define av_bswap64 av_bswap64 |
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| 52 | static inline uint64_t av_const av_bswap64(uint64_t x) |
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| 53 | { |
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| 54 | __asm__("bswap %0": "=r" (x) : "0" (x)); |
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| 55 | return x; |
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| 56 | } |
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| 57 | #endif |
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| 58 | #endif /* !AV_GCC_VERSION_AT_LEAST(4,5) */ |
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| 59 | |||
| 60 | #endif /* HAVE_INLINE_ASM */ |
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| 61 | #endif /* AVUTIL_X86_BSWAP_H */ |