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24 lines
683 B
C
24 lines
683 B
C
#ifdef _COSMO_SOURCE
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#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_BSR_H_
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#define COSMOPOLITAN_LIBC_NEXGEN32E_BSR_H_
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COSMOPOLITAN_C_START_
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libcesque int bsr(int) pureconst;
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libcesque int bsrl(long) pureconst;
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libcesque int bsrll(long long) pureconst;
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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#define bsr(x) (__builtin_clz(x) ^ (sizeof(int) * 8 - 1))
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#define bsrl(x) (__builtin_clzl(x) ^ (sizeof(long) * 8 - 1))
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#define bsrll(x) (__builtin_clzll(x) ^ (sizeof(long long) * 8 - 1))
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#endif
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/* deprecated */
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#define _bsr(x) bsr(x)
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#define _bsrl(x) bsrl(x)
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#define _bsrll(x) bsrll(x)
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_BSR_H_ */
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#endif /* _COSMO_SOURCE */
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