bswap.h (1370B)
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 unsigned y; 43 44 __asm__("rev16 %0, %1" : "=r"(y) : "r"(x)); 45 return y; 46 } 47 #endif 48 #endif /* __ARMCC_VERSION */ 49 50 #endif /* AVUTIL_ARM_BSWAP_H */