mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.0 KiB
72 lines
2.0 KiB
/* |
|
* 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_RISCV_BSWAP_H |
|
#define AVUTIL_RISCV_BSWAP_H |
|
|
|
#include <stdint.h> |
|
#include "config.h" |
|
#include "libavutil/attributes.h" |
|
#include "libavutil/riscv/cpu.h" |
|
|
|
#if defined (__GNUC__) || defined (__clang__) |
|
#define av_bswap16 __builtin_bswap16 |
|
|
|
static av_always_inline av_const uint32_t av_bswap32_rv(uint32_t x) |
|
{ |
|
#if HAVE_RV && !defined(__riscv_zbb) |
|
if (!__builtin_constant_p(x) && |
|
__builtin_expect(ff_rv_zbb_support(), 1)) { |
|
uintptr_t y; |
|
|
|
__asm__ ( |
|
".option push\n" |
|
".option arch, +zbb\n" |
|
"rev8 %0, %1\n" |
|
".option pop" : "=r" (y) : "r" (x)); |
|
return y >> (__riscv_xlen - 32); |
|
} |
|
#endif |
|
return __builtin_bswap32(x); |
|
} |
|
#define av_bswap32 av_bswap32_rv |
|
|
|
#if __riscv_xlen >= 64 |
|
static av_always_inline av_const uint64_t av_bswap64_rv(uint64_t x) |
|
{ |
|
#if HAVE_RV && !defined(__riscv_zbb) |
|
if (!__builtin_constant_p(x) && |
|
__builtin_expect(ff_rv_zbb_support(), 1)) { |
|
uintptr_t y; |
|
|
|
__asm__ ( |
|
".option push\n" |
|
".option arch, +zbb\n" |
|
"rev8 %0, %1\n" |
|
".option pop" : "=r" (y) : "r" (x)); |
|
return y >> (__riscv_xlen - 64); |
|
} |
|
#endif |
|
return __builtin_bswap64(x); |
|
} |
|
#define av_bswap64 av_bswap64_rv |
|
#endif |
|
|
|
#endif |
|
|
|
#endif /* AVUTIL_RISCV_BSWAP_H */
|
|
|