mirror of
https://github.com/jart/cosmopolitan.git
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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
1.1 KiB
C
26 lines
1.1 KiB
C
#ifndef COSMOPOLITAN_LIBC_INTRIN_REPMOVSB_H_
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#define COSMOPOLITAN_LIBC_INTRIN_REPMOVSB_H_
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#ifdef _COSMO_SOURCE
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forceinline void repmovsb(void **dest, const void **src, size_t cx) {
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char *di = (char *)*dest;
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const char *si = (const char *)*src;
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while (cx) *di++ = *si++, cx--;
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*dest = di, *src = si;
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}
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#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
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#define repmovsb(DI, SI, CX) \
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({ \
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void *Di = *(DI); \
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const void *Si = *(SI); \
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size_t Cx = (CX); \
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asm("rep movsb" \
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: "=D"(Di), "=S"(Si), "=c"(Cx), "=m"(*(char(*)[Cx])Di) \
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: "0"(Di), "1"(Si), "2"(Cx), "m"(*(const char(*)[Cx])Si)); \
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*(DI) = Di, *(SI) = Si; \
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})
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#endif
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#endif /* _COSMO_SOURCE */
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#endif /* COSMOPOLITAN_LIBC_INTRIN_REPMOVSB_H_ */
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