text: /*
   * 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_ARM_INTREADWRITE_H
  #define AVUTIL_ARM_INTREADWRITE_H
  
  #include <stdint.h>
  #include "config.h"
  #include "libavutil/attributes.h"
  
  #if HAVE_FAST_UNALIGNED && HAVE_INLINE_ASM && !AV_GCC_VERSION_AT_LEAST(4,7)
  
  #define AV_RN16 AV_RN16
  static av_always_inline unsigned AV_RN16(const void *p)
  {
      const uint8_t *q = p;
      unsigned v;
  #if !AV_GCC_VERSION_AT_LEAST(4,6)
      __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(*(const uint16_t *)q));
  #elif defined __thumb__
      __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(q[0]), "m"(q[1]));
  #else
      __asm__ ("ldrh %0, %1" : "=r"(v) : "Uq"(q[0]), "m"(q[1]));
  #endif
      return v;
  }
  
  #define AV_WN16 AV_WN16
  static av_always_inline void AV_WN16(void *p, uint16_t v)
  {
      __asm__ ("strh %1, %0" : "=m"(*(uint16_t *)p) : "r"(v));
  }
  
  #define AV_RN32 AV_RN32
  static av_always_inline uint32_t AV_RN32(const void *p)
  {
      const struct __attribute__((packed)) { uint32_t v; } *q = p;
      uint32_t v;
      __asm__ ("ldr  %0, %1" : "=r"(v) : "m"(*q));
      return v;
  }
  
  #define AV_WN32 AV_WN32
  static av_always_inline void AV_WN32(void *p, uint32_t v)
  {
      __asm__ ("str  %1, %0" : "=m"(*(uint32_t *)p) : "r"(v));
  }
  
  #if HAVE_ASM_MOD_Q
  
  #define AV_RN64 AV_RN64
  static av_always_inline uint64_t AV_RN64(const void *p)
  {
      const struct __attribute__((packed)) { uint32_t v; } *q = p;
      uint64_t v;
      __asm__ ("ldr   %Q0, %1  \n\t"
               "ldr   %R0, %2  \n\t"
               : "=&r"(v)
               : "m"(q[0]), "m"(q[1]));
      return v;
  }
  
  #define AV_WN64 AV_WN64
  static av_always_inline void AV_WN64(void *p, uint64_t v)
  {
      __asm__ ("str  %Q2, %0  \n\t"
               "str  %R2, %1  \n\t"
               : "=m"(*(uint32_t*)p), "=m"(*((uint32_t*)p+1))
               : "r"(v));
  }
  
  #endif /* HAVE_ASM_MOD_Q */
  
  #endif /* HAVE_INLINE_ASM */
  
  #endif /* AVUTIL_ARM_INTREADWRITE_H */
  