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52 lines
1.7 KiB
52 lines
1.7 KiB
/* |
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* Copyright (c) 2009 Mans Rullgard <mans@mansr.com> |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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_MIPS_INTREADWRITE_H |
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#define AVUTIL_MIPS_INTREADWRITE_H |
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#include <stdint.h> |
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#include "config.h" |
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/* |
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* GCC actually handles unaligned accesses correctly in all cases |
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* except, absurdly, 32-bit loads on mips64. |
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* |
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* https://git.libav.org/?p=libav.git;a=commit;h=b82b49a5b774b6ad9119e981c72b8f594fee2ae0 |
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*/ |
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#if HAVE_MIPS64R2_INLINE || HAVE_MIPS64R1_INLINE |
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#define AV_RN32 AV_RN32 |
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static av_always_inline uint32_t AV_RN32(const void *p) |
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{ |
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struct __attribute__((packed)) u32 { uint32_t v; }; |
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const uint8_t *q = p; |
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const struct u32 *pl = (const struct u32 *)(q + 3 * !HAVE_BIGENDIAN); |
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const struct u32 *pr = (const struct u32 *)(q + 3 * HAVE_BIGENDIAN); |
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uint32_t v; |
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__asm__ ("lwl %0, %1 \n\t" |
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"lwr %0, %2 \n\t" |
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: "=&r"(v) |
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: "m"(*pl), "m"(*pr)); |
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return v; |
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} |
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#endif /* HAVE_MIPS64R2_INLINE || HAVE_MIPS64R1_INLINE */ |
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#endif /* AVUTIL_MIPS_INTREADWRITE_H */
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