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  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. #if ARCH_MIPS64 && HAVE_INLINE_ASM
  28.  
  29. #define AV_RN32 AV_RN32
  30. static av_always_inline uint32_t AV_RN32(const void *p)
  31. {
  32.     struct __attribute__((packed)) u32 { uint32_t v; };
  33.     const uint8_t *q = p;
  34.     const struct u32 *pl = (const struct u32 *)(q + 3 * !HAVE_BIGENDIAN);
  35.     const struct u32 *pr = (const struct u32 *)(q + 3 *  HAVE_BIGENDIAN);
  36.     uint32_t v;
  37.     __asm__ ("lwl %0, %1  \n\t"
  38.              "lwr %0, %2  \n\t"
  39.              : "=&r"(v)
  40.              : "m"(*pl), "m"(*pr));
  41.     return v;
  42. }
  43.  
  44. #endif /* ARCH_MIPS64 && HAVE_INLINE_ASM */
  45.  
  46. #endif /* AVUTIL_MIPS_INTREADWRITE_H */
  47.