/*      $NetBSD: fork.S,v 1.2 2014/08/23 02:24:22 matt Exp $    */

/*
 * pid = fork();
 *
 * r4 == 0 in parent process, 1 in child process.
 * r3 == pid of child in parent, pid of parent in child.
 */

#include "SYS.h"

_SYSCALL(__fork,fork)
        addi    %r4,%r4,-1      # from 1 to 0 in child, 0 to -1 in parent
        and     %r3,%r3,%r4     # return 0 in child, pid in parent
        blr
END(__fork)