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/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#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;
}
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