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