45 lines
763 B
C
45 lines
763 B
C
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#include <linux/config.h>
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#include <linux/string.h>
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#include <linux/module.h>
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#undef memcpy
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#undef memset
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void *memcpy(void *to, const void *from, size_t n)
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{
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#ifdef CONFIG_X86_USE_3DNOW
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return __memcpy3d(to, from, n);
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#else
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return __memcpy(to, from, n);
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#endif
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}
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EXPORT_SYMBOL(memcpy);
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void *memset(void *s, int c, size_t count)
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{
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return __memset(s, c, count);
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}
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EXPORT_SYMBOL(memset);
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void *memmove(void *dest, const void *src, size_t n)
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{
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int d0, d1, d2;
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if (dest < src) {
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memcpy(dest,src,n);
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} else {
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__asm__ __volatile__(
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"std\n\t"
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"rep\n\t"
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"movsb\n\t"
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"cld"
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: "=&c" (d0), "=&S" (d1), "=&D" (d2)
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:"0" (n),
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"1" (n-1+(const char *)src),
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"2" (n-1+(char *)dest)
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:"memory");
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}
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return dest;
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}
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EXPORT_SYMBOL(memmove);
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