usr/src/lib/libc/vax/string/strlen.s

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific written prior permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

#if defined(SYSLIBC_SCCS) && !defined(lint)
_sccsid:.asciz  "@(#)strlen.s   5.4 (Berkeley) %G%"
#endif /* SYSLIBC_SCCS and not lint */

/*
 * Return the length of cp (not counting '\0').
 *
 * strlen(cp)
 *      char *cp;
 */
#include "DEFS.h"

ENTRY(strlen, 0)
        movl    4(ap),r1
1:
        locc    $0,$65535,(r1)  # look for '\0'
        beql    1b
        subl3   4(ap),r1,r0     # len = cp - base
        ret