mirror of
https://github.com/adtools/clib2.git
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66303e9ba2
with the library yet. - The byteswap code was contributed by Peter Bengtsson. Thank you very much! git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15163 87f5fb63-7c3d-0410-a384-fd976d0f7a62
49 lines
732 B
C
49 lines
732 B
C
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#if defined(USE_64_BIT_INTS)
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#if defined(__PPC__) && defined(__GNUC__)
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asm(" .text\n\
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.align 2\n\
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.globl bswap64\n\
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.type bswap64, @function\n\
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bswap64:\n\
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rlwinm %r5,%r3,8,8,31\n\
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rlwimi %r5,%r3,24,0,7\n\
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rlwimi %r5,%r3,24,16,23\n\
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rlwinm %r3,%r4,8,8,31\n\
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rlwimi %r3,%r4,24,0,7\n\
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rlwimi %r3,%r4,24,16,23\n\
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or %r4,%r5,%r5\n\
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blr\n\
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");
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#else
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#include <stdint.h>
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uint64_t bswap64(uint64_t u64)
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{
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union {
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uint64_t ll;
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uint32_t l[2];
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} v={.ll=u64};
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uint32_t tmp;
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tmp=v.l[0];
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v.l[0]=((v.l[1]&0xff)<<24)|
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((v.l[1]&0xff00)<<8)|
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((v.l[1]&0xff0000)>>8)|
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((v.l[1]&0xff000000)>>24);
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v.l[1]=((tmp&0xff)<<24)|
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((tmp&0xff00)<<8)|
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((tmp&0xff0000)>>8)|
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((tmp&0xff000000)>>24);
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return(v.ll);
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}
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#endif
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#endif
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