diff options
author | Måns Rullgård <mans@mansr.com> | 2008-10-22 02:29:57 +0400 |
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committer | Måns Rullgård <mans@mansr.com> | 2008-10-22 02:29:57 +0400 |
commit | 3a90480ac463ffdddfd3718d272a6206eab70bfc (patch) | |
tree | f1df94c4bbc5fc8f7f5e377c9be56f7741595d04 /libavutil/arm | |
parent | 37d3e0667abd01124d783f3ca10a4aef05746a2a (diff) |
split bswap.h into per-arch files
Originally committed as revision 15663 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil/arm')
-rw-r--r-- | libavutil/arm/bswap.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/libavutil/arm/bswap.h b/libavutil/arm/bswap.h new file mode 100644 index 0000000000..deb739407b --- /dev/null +++ b/libavutil/arm/bswap.h @@ -0,0 +1,51 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVUTIL_ARM_BSWAP_H +#define AVUTIL_ARM_BSWAP_H + +#include <stdint.h> +#include "config.h" +#include "libavutil/common.h" + +#ifdef HAVE_ARMV6 +#define bswap_16 bswap_16 +static av_always_inline av_const uint16_t bswap_16(uint16_t x) +{ + __asm__("rev16 %0, %0" : "+r"(x)); + return x; +} +#endif + +#define bswap_32 bswap_32 +static av_always_inline av_const uint32_t bswap_32(uint32_t x) +{ +#ifdef HAVE_ARMV6 + __asm__("rev %0, %0" : "+r"(x)); +#else + uint32_t t; + __asm__ ("eor %1, %0, %0, ror #16 \n\t" + "bic %1, %1, #0xFF0000 \n\t" + "mov %0, %0, ror #8 \n\t" + "eor %0, %0, %1, lsr #8 \n\t" + : "+r"(x), "=&r"(t)); +#endif /* HAVE_ARMV6 */ + return x; +} + +#endif /* AVUTIL_ARM_BSWAP_H */ |