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eeb20775d2
This will help C++ code that uses exceptions to be tinier. For example, this change shaves away 1000 lines of assembly code from LLVM's libcxx, which is 0.7% of all assembly instructions in the entire library.
17 lines
460 B
C
17 lines
460 B
C
#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_BSF_H_
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#define COSMOPOLITAN_LIBC_NEXGEN32E_BSF_H_
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COSMOPOLITAN_C_START_
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libcesque int _bsf(int) pureconst;
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libcesque int _bsfl(long) pureconst;
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libcesque int _bsfll(long long) pureconst;
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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#define _bsf(x) __builtin_ctz(x)
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#define _bsfl(x) __builtin_ctzl(x)
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#define _bsfll(x) __builtin_ctzll(x)
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#endif
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_BSF_H_ */
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