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74 lines
2.0 KiB
74 lines
2.0 KiB
/* |
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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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