bswap.h (1525B)
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_AARCH64_BSWAP_H 20 #define AVUTIL_AARCH64_BSWAP_H 21 22 #include <stdint.h> 23 #include "config.h" 24 #include "libavutil/attributes.h" 25 26 #if HAVE_INLINE_ASM 27 28 #define av_bswap16 av_bswap16 29 static av_always_inline av_const unsigned av_bswap16(unsigned x) 30 { 31 unsigned y; 32 33 __asm__("rev16 %w0, %w1" : "=r"(y) : "r"(x)); 34 return y; 35 } 36 37 #define av_bswap32 av_bswap32 38 static av_always_inline av_const uint32_t av_bswap32(uint32_t x) 39 { 40 uint32_t y; 41 42 __asm__("rev %w0, %w1" : "=r"(y) : "r"(x)); 43 return y; 44 } 45 46 #define av_bswap64 av_bswap64 47 static av_always_inline av_const uint64_t av_bswap64(uint64_t x) 48 { 49 uint64_t y; 50 51 __asm__("rev %0, %1" : "=r"(y) : "r"(x)); 52 return y; 53 } 54 55 #endif /* HAVE_INLINE_ASM */ 56 #endif /* AVUTIL_AARCH64_BSWAP_H */