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kernel add
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#include "../string.c"
#ifdef CONFIG_X86_32
void *memcpy(void *dest, const void *src, size_t n)
{
int d0, d1, d2;
asm volatile(
"rep ; movsl
\t"
"movl %4,%%ecx
\t"
"rep ; movsb
\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
: "memory");
return dest;
}
#else
void *memcpy(void *dest, const void *src, size_t n)
{
long d0, d1, d2;
asm volatile(
"rep ; movsq
\t"
"movq %4,%%rcx
\t"
"rep ; movsb
\t"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
: "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src)
: "memory");
return dest;
}
#endif
void *memset(void *s, int c, size_t n)
{
int i;
char *ss = s;
for (i = 0; i < n; i++)
ss[i] = c;
return s;
}
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