42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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#ifdef _MSC_VER
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# include <intrin.h>
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# define COUNT_LEADING_ZEROS_NEED_CLZ_TAB
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# if !defined( _WIN64 )
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# pragma intrinsic(_BitScanForward)
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# pragma intrinsic(_BitScanReverse)
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# pragma intrinsic(__emulu)
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# pragma intrinsic(_byteswap_ulong)
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# define count_leading_zeros(c,x) \
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do { unsigned long _z; \
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ASSERT ((x) != 0); \
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_BitScanReverse(&_z, (x)); \
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c = 31 - _z; \
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} while (0)
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# define count_trailing_zeros(c,x) \
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do { unsigned long _z; \
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ASSERT ((x) != 0); \
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_BitScanForward(&_z, (x)); \
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c = _z; \
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} while (0)
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# define umul_ppmm(xh, xl, m0, m1) \
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do { unsigned __int64 _t; \
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_t = __emulu( (m0), (m1)); \
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xl = _t & 0xffffffff; \
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xh = _t >> 32; \
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} while (0)
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# if !defined( BSWAP_LIMB )
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# define BSWAP_LIMB
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# define BSWAP_LIMB(dst, src) dst = _byteswap_ulong(src)
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# endif
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# endif /* _WIN64 */
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#endif /* _MSC_VER */
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