mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-18 03:22:40 +00:00
fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
26 lines
927 B
C
26 lines
927 B
C
#ifndef COSMOPOLITAN_LIBC_INTRIN_REPSTOSB_H_
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#define COSMOPOLITAN_LIBC_INTRIN_REPSTOSB_H_
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#ifdef _COSMO_SOURCE
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forceinline void *repstosb(void *dest, unsigned char al, size_t cx) {
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unsigned char *di = (unsigned char *)dest;
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while (cx) *di++ = al, cx--;
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return di;
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}
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#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
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#define repstosb(DI, AL, CX) \
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({ \
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void *Di = (DI); \
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size_t Cx = (CX); \
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unsigned char Al = (AL); \
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asm("rep stosb %b5,(%0)" \
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: "=D"(Di), "=c"(Cx), "=m"(*(char(*)[Cx])Di) \
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: "0"(Di), "1"(Cx), "a"(Al)); \
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Di; \
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})
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#endif
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#endif /* _COSMO_SOURCE */
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#endif /* COSMOPOLITAN_LIBC_INTRIN_REPSTOSB_H_ */
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