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Viewing changes to ffmpeg/libavutil/x86/bswap.h

  • Committer: Package Import Robot
  • Author(s): Reinhard Tartler
  • Date: 2012-01-12 22:23:28 UTC
  • mfrom: (0.4.7 sid)
  • mto: This revision was merged to the branch mainline in revision 76.
  • Revision ID: package-import@ubuntu.com-20120112222328-8jqdyodym3p84ygu
Tags: 2:1.0~rc4.dfsg1+svn34540-1
* New upstream snapshot
* upload to unstable

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ffmpeg/libavutil/x86/bswap.h
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#include "config.h"
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#include "libavutil/attributes.h"
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#if !AV_GCC_VERSION_AT_LEAST(4,1)
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#define av_bswap16 av_bswap16
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static av_always_inline av_const unsigned av_bswap16(unsigned x)
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{
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    __asm__("rorw $8, %w0" : "+r"(x));
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    return x;
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}
 
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#endif /* !AV_GCC_VERSION_AT_LEAST(4,1) */
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#if !AV_GCC_VERSION_AT_LEAST(4,5)
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#define av_bswap32 av_bswap32
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static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
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{
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#if HAVE_BSWAP
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    __asm__("bswap   %0" : "+r" (x));
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#else
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    __asm__("rorw    $8,  %w0 \n\t"
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            "rorl    $16, %0  \n\t"
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            "rorw    $8,  %w0"
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            : "+r"(x));
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#endif
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    return x;
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}
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    return x;
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}
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#endif
 
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#endif /* !AV_GCC_VERSION_AT_LEAST(4,5) */
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#endif /* AVUTIL_X86_BSWAP_H */