1/*        $NetBSD: fork.S,v 1.2 2014/08/23 02:24:22 matt Exp $        */
2
3/*
4 * pid = fork();
5 *
6 * r4 == 0 in parent process, 1 in child process.
7 * r3 == pid of child in parent, pid of parent in child.
8 */
9
10#include "SYS.h"
11
12_SYSCALL(__fork,fork)
13          addi      %r4,%r4,-1          # from 1 to 0 in child, 0 to -1 in parent
14          and       %r3,%r3,%r4         # return 0 in child, pid in parent
15          blr
16END(__fork)
17