1/*
2 * memset.c
3 */
4
5#include <string.h>
6#include <stdint.h>
7
8void *memset(void *dst, int c, size_t n)
9{
10	char *q = dst;
11
12#if defined(__i386__)
13	size_t nl = n >> 2;
14	asm volatile ("cld ; rep ; stosl ; movl %3,%0 ; rep ; stosb"
15		      : "+c" (nl), "+D" (q)
16		      : "a" ((unsigned char)c * 0x01010101U), "r" (n & 3));
17#elif defined(__x86_64__)
18	size_t nq = n >> 3;
19	asm volatile ("cld ; rep ; stosq ; movl %3,%%ecx ; rep ; stosb"
20		      :"+c" (nq), "+D" (q)
21		      : "a" ((unsigned char)c * 0x0101010101010101U),
22			"r" ((uint32_t) n & 7));
23#else
24	while (n--) {
25		*q++ = c;
26	}
27#endif
28
29	return dst;
30}
31