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MIPS: inline asm for intreadwrite.h

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Originally committed as revision 18980 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-05-28 23:19:35 +00:00
parent 9d48e28f00
commit 530456bf31
2 changed files with 96 additions and 0 deletions
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2
libavutil/intreadwrite.h
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@ -31,6 +31,8 @@
#if ARCH_ARM
# include "arm/intreadwrite.h"
#elif ARCH_MIPS
# include "mips/intreadwrite.h"
#elif ARCH_PPC
# include "ppc/intreadwrite.h"
#endif

94
libavutil/mips/intreadwrite.h Normal file
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@ -0,0 +1,94 @@
/*
* Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
*
* 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_MIPS_INTREADWRITE_H
#define AVUTIL_MIPS_INTREADWRITE_H
#include <stdint.h>
#include "config.h"
#define AV_RN32 AV_RN32
static inline uint32_t AV_RN32(const void *p)
{
uint32_t v;
__asm__ ("lwl %0, %1 \n\t"
"lwr %0, %2 \n\t"
: "=&r"(v)
: "m"(*(const uint32_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
"m"(*(const uint32_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
return v;
}
#define AV_WN32 AV_WN32
static inline void AV_WN32(void *p, uint32_t v)
{
__asm__ ("swl %2, %0 \n\t"
"swr %2, %1 \n\t"
: "=m"(*(uint32_t *)((uint8_t *)p+3*!HAVE_BIGENDIAN)),
"=m"(*(uint32_t *)((uint8_t *)p+3*HAVE_BIGENDIAN))
: "r"(v));
}
#if ARCH_MIPS64
#define AV_RN64 AV_RN64
static inline uint64_t AV_RN64(const void *p)
{
uint64_t v;
__asm__ ("lwl %0, %1 \n\t"
"lwr %0, %2 \n\t"
: "=&r"(v)
: "m"(*(const uint64_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
"m"(*(const uint64_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
return v;
}
#define AV_WN64 AV_WN64
static inline void AV_WN64(void *p, uint64_t v)
{
__asm__ ("swl %2, %0 \n\t"
"swr %2, %1 \n\t"
: "=m"(*(uint64_t *)((uint8_t *)p+7*!HAVE_BIGENDIAN)),
"=m"(*(uint64_t *)((uint8_t *)p+7*HAVE_BIGENDIAN))
: "r"(v));
}
#else
#define AV_RN64 AV_RN64
static inline uint64_t AV_RN64(const void *p)
{
union { uint64_t v; uint32_t hl[2]; } v;
v.hl[0] = AV_RN32(p);
v.hl[1] = AV_RN32((const uint8_t *)p + 4);
return v.v;
}
#define AV_WN64 AV_WN64
static inline void AV_WN64(void *p, uint64_t v)
{
union { uint64_t v; uint32_t hl[2]; } vv = { v };
AV_WN32(p, vv.hl[0]);
AV_WN32((uint8_t *)p + 4, vv.hl[1]);
}
#endif /* ARCH_MIPS64 */
#endif /* AVUTIL_MIPS_INTREADWRITE_H */