[mirror_ubuntu-artful-kernel.git] / arch / x86 / lib / memcpy_32.c

#include <linux/string.h>
#include <linux/module.h>

#undef memcpy
#undef memset

void *memcpy(void *to, const void *from, size_t n)
{
#ifdef CONFIG_X86_USE_3DNOW
	return __memcpy3d(to, from, n);
#else
	return __memcpy(to, from, n);
#endif
}
EXPORT_SYMBOL(memcpy);

void *memset(void *s, int c, size_t count)
{
	return __memset(s, c, count);
}
EXPORT_SYMBOL(memset);

void *memmove(void *dest, const void *src, size_t n)
{
	int d0, d1, d2;

	if (dest < src) {
		memcpy(dest, src, n);
	} else {
		__asm__ __volatile__(
			"std\n\t"
			"rep\n\t"
			"movsb\n\t"
			"cld"
			: "=&c" (d0), "=&S" (d1), "=&D" (d2)
			:"0" (n),
			 "1" (n-1+src),
			 "2" (n-1+dest)
			:"memory");
	}
	return dest;
}
EXPORT_SYMBOL(memmove);
Commit	Line	Data
1da177e4 LT	1	#include <linux/string.h>
	2	#include <linux/module.h>
	3
	4	#undef memcpy
	5	#undef memset
	6
	7	void memcpy(void to, const void *from, size_t n)
	8	{
	9	#ifdef CONFIG_X86_USE_3DNOW
	10	return __memcpy3d(to, from, n);
	11	#else
	12	return __memcpy(to, from, n);
	13	#endif
	14	}
	15	EXPORT_SYMBOL(memcpy);
	16
	17	void memset(void s, int c, size_t count)
	18	{
	19	return __memset(s, c, count);
	20	}
	21	EXPORT_SYMBOL(memset);
	22
	23	void memmove(void dest, const void *src, size_t n)
	24	{
	25	int d0, d1, d2;
	26
	27	if (dest < src) {
93d8bd3d	28	memcpy(dest, src, n);
1da177e4 LT	29	} else {
	30	__asm__ __volatile__(
	31	"std\n\t"
	32	"rep\n\t"
	33	"movsb\n\t"
	34	"cld"
	35	: "=&c" (d0), "=&S" (d1), "=&D" (d2)
	36	:"0" (n),
ade1af77 JE	37	"1" (n-1+src),
ade1af77 JE	38	"2" (n-1+dest)
1da177e4 LT	39	:"memory");
	40	}
	41	return dest;
	42	}
	43	EXPORT_SYMBOL(memmove);