minix/lib/libc/arch/i386/string/memcpy.S

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/* memcpy() Author: Kees J. Bot */
/* 2 Jan 1994 */
/* void *memcpy(void *s1, const void *s2, size_t n) */
/* Copy a chunk of memory. */
/* This routine need not handle overlap, so it does not handle overlap. */
/* One could simply call __memmove, the cost of the overlap check is */
/* negligible, but you are dealing with a programmer who believes that if */
/* anything can go wrong, it should go wrong. */
/* */
.text
.globl _memcpy
.balign 16
_memcpy:
push %ebp
movl %esp, %ebp
push %esi
push %edi
movl 8(%ebp), %edi /* String s1 */
movl 12(%ebp), %esi /* String s2 */
movl 16(%ebp), %ecx /* Length */
/* No overlap check here */
jmp __memcpy /* Call the part of __memmove that copies up */