[mirror_ubuntu-zesty-kernel.git] / arch / x86_64 / lib / memmove_64.c

/* Normally compiler builtins are used, but sometimes the compiler calls out
   of line code. Based on asm-i386/string.h.
 */
#define _STRING_C
#include <linux/string.h>
#include <linux/module.h>

#undef memmove
void *memmove(void * dest,const void *src,size_t count)
{
	if (dest < src) { 
		return memcpy(dest,src,count);
	} else {
		char *p = (char *) dest + count;
		char *s = (char *) src + count;
		while (count--)
			*--p = *--s;
	}
	return dest;
} 
EXPORT_SYMBOL(memmove);
Commit	Line	Data
1da177e4 LT	1	/* Normally compiler builtins are used, but sometimes the compiler calls out
	2	of line code. Based on asm-i386/string.h.
	3	*/
	4	#define _STRING_C
	5	#include <linux/string.h>
2ee60e17	6	#include <linux/module.h>
1da177e4 LT	7
	8	#undef memmove
	9	void memmove(void dest,const void *src,size_t count)
	10	{
	11	if (dest < src) {
6bfa9bb5	12	return memcpy(dest,src,count);
1da177e4 LT	13	} else {
	14	char p = (char ) dest + count;
	15	char s = (char ) src + count;
	16	while (count--)
	17	--p = --s;
	18	}
	19	return dest;
	20	}
2ee60e17	21	EXPORT_SYMBOL(memmove);