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32 lines
959 B
C
32 lines
959 B
C
#ifndef BITUTILS_H
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#define BITUTILS_H
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/* We use two types of dispatching: intrinsics and target_clones */
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/* TODO Move to better place */
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#ifndef DISABLE_DISPATCH
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/* Only enable for more recent compilers to keep build process simple */
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#if defined(__x86_64__) && defined(__GNUC__) && __GNUC__ >= 8
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#define USE_DISPATCH
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#elif defined(__x86_64__) && defined(__clang_major__) && __clang_major__ >= 7
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#define USE_DISPATCH
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#elif defined(_M_AMD64) && defined(_MSC_VER) && _MSC_VER >= 1920
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#define USE_DISPATCH
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#endif
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#endif
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/* target_clones requires glibc */
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#if defined(USE_DISPATCH) && defined(__gnu_linux__)
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#define USE_TARGET_CLONES
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#endif
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#if defined(USE_DISPATCH)
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#define BIT_DISPATCH
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#endif
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extern uint64 (*BitHammingDistance) (uint32 bytes, unsigned char *ax, unsigned char *bx, uint64 distance);
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extern double (*BitJaccardDistance) (uint32 bytes, unsigned char *ax, unsigned char *bx, uint64 ab, uint64 aa, uint64 bb);
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void BitvecInit(void);
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#endif
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