/ memcpy.s (emx+gcc) -- Copyright (c) 1990-1993 by Eberhard Mattes

        .globl _memcpy

/ void *memcpy (void *s1, const void *s2, size_t n)
/ {
/   size_t i;
/   
/   for (i = 0; i < n; ++i)
/       ((char *)s1)[i] = ((char *)s2)[i];
/   return (s1);
/ }

/ assumes ds=es!

        .text

        .align  2, 0x90

_memcpy:
        pushl   %esi
        pushl   %edi
        movl    3*4(%esp), %edi         / s1
        movl    4*4(%esp), %esi         / s2
        movl    5*4(%esp), %ecx         / n
        shrl    $2, %ecx
        rep
        movsl
        movl    5*4(%esp), %ecx         / n
        andl    $3, %ecx
        rep
        movsb
        movl    3*4(%esp), %eax         / s1
        popl    %edi
        popl    %esi
        ret