libavutil/mips/intreadwrite.h

   1 /*
   2  * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVUTIL_MIPS_INTREADWRITE_H
  22 #define AVUTIL_MIPS_INTREADWRITE_H
  23
  24 #include <stdint.h>
  25 #include "config.h"
  26
  27 #define AV_RN32 AV_RN32
  28 static inline uint32_t AV_RN32(const void *p)
  29 {
  30     uint32_t v;
  31     __asm__ ("lwl %0, %1  \n\t"
  32              "lwr %0, %2  \n\t"
  33              : "=&r"(v)
  34              : "m"(*(const uint32_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
  35                "m"(*(const uint32_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
  36     return v;
  37 }
  38
  39 #define AV_WN32 AV_WN32
  40 static inline void AV_WN32(void *p, uint32_t v)
  41 {
  42     __asm__ ("swl %2, %0  \n\t"
  43              "swr %2, %1  \n\t"
  44              : "=m"(*(uint32_t *)((uint8_t *)p+3*!HAVE_BIGENDIAN)),
  45                "=m"(*(uint32_t *)((uint8_t *)p+3*HAVE_BIGENDIAN))
  46              : "r"(v));
  47 }
  48
  49 #if ARCH_MIPS64
  50
  51 #define AV_RN64 AV_RN64
  52 static inline uint64_t AV_RN64(const void *p)
  53 {
  54     uint64_t v;
  55     __asm__ ("lwl %0, %1  \n\t"
  56              "lwr %0, %2  \n\t"
  57              : "=&r"(v)
  58              : "m"(*(const uint64_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
  59                "m"(*(const uint64_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
  60     return v;
  61 }
  62
  63 #define AV_WN64 AV_WN64
  64 static inline void AV_WN64(void *p, uint64_t v)
  65 {
  66     __asm__ ("swl %2, %0  \n\t"
  67              "swr %2, %1  \n\t"
  68              : "=m"(*(uint64_t *)((uint8_t *)p+7*!HAVE_BIGENDIAN)),
  69                "=m"(*(uint64_t *)((uint8_t *)p+7*HAVE_BIGENDIAN))
  70              : "r"(v));
  71 }
  72
  73 #else
  74
  75 #define AV_RN64 AV_RN64
  76 static inline uint64_t AV_RN64(const void *p)
  77 {
  78     union { uint64_t v; uint32_t hl[2]; } v;
  79     v.hl[0] = AV_RN32(p);
  80     v.hl[1] = AV_RN32((const uint8_t *)p + 4);
  81     return v.v;
  82 }
  83
  84 #define AV_WN64 AV_WN64
  85 static inline void AV_WN64(void *p, uint64_t v)
  86 {
  87     union { uint64_t v; uint32_t hl[2]; } vv = { v };
  88     AV_WN32(p, vv.hl[0]);
  89     AV_WN32((uint8_t *)p + 4, vv.hl[1]);
  90 }
  91
  92 #endif /* ARCH_MIPS64 */
  93
  94 #endif /* AVUTIL_MIPS_INTREADWRITE_H */