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untested generic bswap64

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Originally committed as revision 603 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Nick Kurshev 2002-05-26 09:45:45 +00:00
parent 3120d2a265
commit bbdadbda05
1 changed files with 13 additions and 0 deletions
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13
libavcodec/bswap.h
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@ -5,6 +5,7 @@
#include <byteswap.h>
#else
#include <inttypes.h> /* for __WORDSIZE */
#ifdef ARCH_X86
inline static unsigned short ByteSwap16(unsigned short x)
{
@ -52,6 +53,17 @@ inline static unsigned long long int ByteSwap64(unsigned long long int x)
((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
#if __WORDSIZE >= 64
# define bswap_64(x) \
((((x) & 0xff00000000000000ull) >> 56) \
| (((x) & 0x00ff000000000000ull) >> 40) \
| (((x) & 0x0000ff0000000000ull) >> 24) \
| (((x) & 0x000000ff00000000ull) >> 8) \
| (((x) & 0x00000000ff000000ull) << 8) \
| (((x) & 0x0000000000ff0000ull) << 24) \
| (((x) & 0x000000000000ff00ull) << 40) \
| (((x) & 0x00000000000000ffull) << 56))
#else
#define bswap_64(x) \
(__extension__ \
({ union { __extension__ unsigned long long int __ll; \
@ -60,6 +72,7 @@ inline static unsigned long long int ByteSwap64(unsigned long long int x)
__r.__l[0] = bswap_32 (__w.__l[1]); \
__r.__l[1] = bswap_32 (__w.__l[0]); \
__r.__ll; }))
#endif
#endif /* !ARCH_X86 */
#endif /* !HAVE_BYTESWAP_H */