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b82b49a5b7
GCC actually handles unaligned accesses correctly in all cases except, absurdly, 32-bit loads on mips64. The remaining asm is thus not needed, and removing it results in better code. Signed-off-by: Mans Rullgard <mans@mansr.com>
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/*
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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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#if ARCH_MIPS64 && HAVE_INLINE_ASM
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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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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"(*(const uint32_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
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"m"(*(const uint32_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
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return v;
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}
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#endif /* ARCH_MIPS64 && HAVE_INLINE_ASM */
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#endif /* AVUTIL_MIPS_INTREADWRITE_H */
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