0,0 → 1,67 |
/* |
* 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/attributes.h" |
|
#ifdef __ARMCC_VERSION |
|
#if HAVE_ARMV6 |
#define av_bswap32 av_bswap32 |
static av_always_inline av_const uint32_t av_bswap32(uint32_t x) |
{ |
return __rev(x); |
} |
#endif /* HAVE_ARMV6 */ |
|
#elif HAVE_INLINE_ASM |
|
#if HAVE_ARMV6_INLINE |
#define av_bswap16 av_bswap16 |
static av_always_inline av_const unsigned av_bswap16(unsigned x) |
{ |
__asm__("rev16 %0, %0" : "+r"(x)); |
return x; |
} |
#endif |
|
#if !AV_GCC_VERSION_AT_LEAST(4,5) |
#define av_bswap32 av_bswap32 |
static av_always_inline av_const uint32_t av_bswap32(uint32_t x) |
{ |
#if HAVE_ARMV6_INLINE |
__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_INLINE */ |
return x; |
} |
#endif /* !AV_GCC_VERSION_AT_LEAST(4,5) */ |
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#endif /* __ARMCC_VERSION */ |
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#endif /* AVUTIL_ARM_BSWAP_H */ |