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libavutil/mips/intreadwrite.h

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00001 /*
00002  * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
00003  *
00004  * This file is part of Libav.
00005  *
00006  * Libav is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * Libav is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with Libav; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #ifndef AVUTIL_MIPS_INTREADWRITE_H
00022 #define AVUTIL_MIPS_INTREADWRITE_H
00023 
00024 #include <stdint.h>
00025 #include "config.h"
00026 
00027 #if HAVE_INLINE_ASM
00028 
00029 #define AV_RN32 AV_RN32
00030 static av_always_inline uint32_t AV_RN32(const void *p)
00031 {
00032     uint32_t v;
00033     __asm__ ("lwl %0, %1  \n\t"
00034              "lwr %0, %2  \n\t"
00035              : "=&r"(v)
00036              : "m"(*(const uint32_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
00037                "m"(*(const uint32_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
00038     return v;
00039 }
00040 
00041 #define AV_WN32 AV_WN32
00042 static av_always_inline void AV_WN32(void *p, uint32_t v)
00043 {
00044     __asm__ ("swl %2, %0  \n\t"
00045              "swr %2, %1  \n\t"
00046              : "=m"(*(uint32_t *)((uint8_t *)p+3*!HAVE_BIGENDIAN)),
00047                "=m"(*(uint32_t *)((uint8_t *)p+3*HAVE_BIGENDIAN))
00048              : "r"(v));
00049 }
00050 
00051 #if ARCH_MIPS64
00052 
00053 #define AV_RN64 AV_RN64
00054 static av_always_inline uint64_t AV_RN64(const void *p)
00055 {
00056     uint64_t v;
00057     __asm__ ("ldl %0, %1  \n\t"
00058              "ldr %0, %2  \n\t"
00059              : "=&r"(v)
00060              : "m"(*(const uint64_t *)((const uint8_t *)p+7*!HAVE_BIGENDIAN)),
00061                "m"(*(const uint64_t *)((const uint8_t *)p+7*HAVE_BIGENDIAN)));
00062     return v;
00063 }
00064 
00065 #define AV_WN64 AV_WN64
00066 static av_always_inline void AV_WN64(void *p, uint64_t v)
00067 {
00068     __asm__ ("sdl %2, %0  \n\t"
00069              "sdr %2, %1  \n\t"
00070              : "=m"(*(uint64_t *)((uint8_t *)p+7*!HAVE_BIGENDIAN)),
00071                "=m"(*(uint64_t *)((uint8_t *)p+7*HAVE_BIGENDIAN))
00072              : "r"(v));
00073 }
00074 
00075 #else
00076 
00077 #define AV_RN64 AV_RN64
00078 static av_always_inline uint64_t AV_RN64(const void *p)
00079 {
00080     union { uint64_t v; uint32_t hl[2]; } v;
00081     v.hl[0] = AV_RN32(p);
00082     v.hl[1] = AV_RN32((const uint8_t *)p + 4);
00083     return v.v;
00084 }
00085 
00086 #define AV_WN64 AV_WN64
00087 static av_always_inline void AV_WN64(void *p, uint64_t v)
00088 {
00089     union { uint64_t v; uint32_t hl[2]; } vv = { v };
00090     AV_WN32(p, vv.hl[0]);
00091     AV_WN32((uint8_t *)p + 4, vv.hl[1]);
00092 }
00093 
00094 #endif /* ARCH_MIPS64 */
00095 
00096 #endif /* HAVE_INLINE_ASM */
00097 
00098 #endif /* AVUTIL_MIPS_INTREADWRITE_H */
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