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ca1fa5b80b
when compiling without optimization (when nothing is inlined) git-svn-id: file:///home/jj/hercules.svn/trunk@400 956126f8-22a0-4046-8f4a-272fa8102e63
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* BYTESWAP.H Little <> Big Endian conversion - Jan Jaeger */
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/* These definitions are only nessesary when running on older */
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/* versions of linux that do not have /usr/include/byteswap.h */
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/* compile option -DNO_ASM_BYTESWAP will expand 'C' code */
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/* otherwise Intel (486+) assember will be generated */
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#if !defined(_BYTESWAP_H)
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#define _BYTESWAP_H
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#if !defined(NO_ASM_BYTESWAP)
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#include "htypes.h"
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static __inline__ ATTR_REGPARM(1) uint16_t bswap_16(uint16_t x)
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{
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__asm__("xchgb %b0,%h0" : "=q" (x) : "0" (x));
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return x;
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}
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static __inline__ ATTR_REGPARM(1) uint32_t bswap_32(uint32_t x)
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{
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__asm__("bswap %0" : "=r" (x) : "0" (x));
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return x;
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}
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#else
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#define bswap_16(_x) \
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( (((_x) & 0xFF00) >> 8) \
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| (((_x) & 0x00FF) << 8) )
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#define bswap_32(_x) \
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( (((_x) & 0xFF000000) >> 24) \
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| (((_x) & 0x00FF0000) >> 8) \
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| (((_x) & 0x0000FF00) << 8) \
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| (((_x) & 0x000000FF) << 24) )
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#endif
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#define bswap_64(_x) \
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( ((U64)((_x) & 0xFF00000000000000ULL) >> 56) \
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| ((U64)((_x) & 0x00FF000000000000ULL) >> 40) \
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| ((U64)((_x) & 0x0000FF0000000000ULL) >> 24) \
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| ((U64)((_x) & 0x000000FF00000000ULL) >> 8) \
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| ((U64)((_x) & 0x00000000FF000000ULL) << 8) \
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| ((U64)((_x) & 0x0000000000FF0000ULL) << 24) \
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| ((U64)((_x) & 0x000000000000FF00ULL) << 40) \
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| ((U64)((_x) & 0x00000000000000FFULL) << 56) )
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#endif /*!defined(_BYTESWAP_H)*/
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