mirror of https://git.ffmpeg.org/ffmpeg.git
75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_RISCV_BSWAP_H
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#define AVUTIL_RISCV_BSWAP_H
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#include <stdint.h>
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#include "config.h"
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#include "libavutil/attributes.h"
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#if defined (__riscv_zbb) && (__riscv_zbb > 0) && HAVE_INLINE_ASM
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static av_always_inline av_const uintptr_t av_bswap_xlen(uintptr_t x)
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{
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uintptr_t y;
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__asm__("rev8 %0, %1" : "=r" (y) : "r" (x));
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return y;
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}
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#define av_bswap16 av_bswap16
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static av_always_inline av_const uint_fast16_t av_bswap16(uint_fast16_t x)
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{
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return av_bswap_xlen(x) >> (__riscv_xlen - 16);
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}
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#if (__riscv_xlen == 32)
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#define av_bswap32 av_bswap_xlen
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#define av_bswap64 av_bswap64
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static av_always_inline av_const uint64_t av_bswap64(uint64_t x)
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{
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return (((uint64_t)av_bswap32(x)) << 32) | av_bswap32(x >> 32);
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}
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#else
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#define av_bswap32 av_bswap32
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static av_always_inline av_const uint_fast32_t av_bswap32(uint_fast32_t x)
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{
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return av_bswap_xlen(x) >> (__riscv_xlen - 32);
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}
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#if (__riscv_xlen == 64)
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#define av_bswap64 av_bswap_xlen
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#else
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#define av_bswap64 av_bswap64
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static av_always_inline av_const uint_fast64_t av_bswap64(uint_fast64_t x)
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{
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return av_bswap_xlen(x) >> (__riscv_xlen - 64);
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}
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#endif /* __riscv_xlen > 64 */
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#endif /* __riscv_xlen > 32 */
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#endif /* __riscv_zbb */
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#endif /* AVUTIL_RISCV_BSWAP_H */
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