/* SPDX-License-Identifier: GPL-2.0-only */ | |
/* This file is part of the coreboot project. */ | |
#include <string.h> | |
void *memcpy(void *dest, const void *src, size_t n) | |
{ | |
unsigned long d0, d1, d2; | |
asm volatile( | |
#ifdef __x86_64__ | |
"rep ; movsd\n\t" | |
"mov %4,%%rcx\n\t" | |
#else | |
"rep ; movsl\n\t" | |
"movl %4,%%ecx\n\t" | |
#endif | |
"rep ; movsb\n\t" | |
: "=&c" (d0), "=&D" (d1), "=&S" (d2) | |
: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) | |
: "memory" | |
); | |
return dest; | |
} |