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  1. /*
  2.  * Copyright (c) 2010 Alexander Strange <astrange@ithinksw.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_X86_INTREADWRITE_H
  22. #define AVUTIL_X86_INTREADWRITE_H
  23.  
  24. #include <stdint.h>
  25. #include "config.h"
  26. #include "libavutil/attributes.h"
  27.  
  28. #if HAVE_MMX
  29.  
  30. #if !HAVE_FAST_64BIT && defined(__MMX__)
  31.  
  32. #define AV_COPY64 AV_COPY64
  33. static av_always_inline void AV_COPY64(void *d, const void *s)
  34. {
  35.     __asm__("movq   %1, %%mm0  \n\t"
  36.             "movq   %%mm0, %0  \n\t"
  37.             : "=m"(*(uint64_t*)d)
  38.             : "m" (*(const uint64_t*)s)
  39.             : "mm0");
  40. }
  41.  
  42. #define AV_SWAP64 AV_SWAP64
  43. static av_always_inline void AV_SWAP64(void *a, void *b)
  44. {
  45.     __asm__("movq   %1, %%mm0  \n\t"
  46.             "movq   %0, %%mm1  \n\t"
  47.             "movq   %%mm0, %0  \n\t"
  48.             "movq   %%mm1, %1  \n\t"
  49.             : "+m"(*(uint64_t*)a), "+m"(*(uint64_t*)b)
  50.             ::"mm0", "mm1");
  51. }
  52.  
  53. #define AV_ZERO64 AV_ZERO64
  54. static av_always_inline void AV_ZERO64(void *d)
  55. {
  56.     __asm__("pxor %%mm0, %%mm0  \n\t"
  57.             "movq %%mm0, %0     \n\t"
  58.             : "=m"(*(uint64_t*)d)
  59.             :: "mm0");
  60. }
  61.  
  62. #endif /* !HAVE_FAST_64BIT && defined(__MMX__) */
  63.  
  64. #ifdef __SSE__
  65.  
  66. #define AV_COPY128 AV_COPY128
  67. static av_always_inline void AV_COPY128(void *d, const void *s)
  68. {
  69.     struct v {uint64_t v[2];};
  70.  
  71.     __asm__("movaps   %1, %%xmm0  \n\t"
  72.             "movaps   %%xmm0, %0  \n\t"
  73.             : "=m"(*(struct v*)d)
  74.             : "m" (*(const struct v*)s)
  75.             : "xmm0");
  76. }
  77.  
  78. #endif /* __SSE__ */
  79.  
  80. #ifdef __SSE2__
  81.  
  82. #define AV_ZERO128 AV_ZERO128
  83. static av_always_inline void AV_ZERO128(void *d)
  84. {
  85.     struct v {uint64_t v[2];};
  86.  
  87.     __asm__("pxor %%xmm0, %%xmm0  \n\t"
  88.             "movdqa   %%xmm0, %0  \n\t"
  89.             : "=m"(*(struct v*)d)
  90.             :: "xmm0");
  91. }
  92.  
  93. #endif /* __SSE2__ */
  94.  
  95. #endif /* HAVE_MMX */
  96.  
  97. #endif /* AVUTIL_X86_INTREADWRITE_H */
  98.