Annotation of sys/lib/libkern/arch/sparc64/strlen.S, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: strlen.S,v 1.3 2003/06/02 23:28:09 millert Exp $ */
2: /* $NetBSD: strlen.S,v 1.1.1.1 1998/06/20 05:18:14 eeh Exp $ */
3:
4: /*
5: * Copyright (c) 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This software was developed by the Computer Systems Engineering group
9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10: * contributed to Berkeley.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
36: * Header: strlen.s,v 1.1 92/06/25 12:52:47 torek Exp
37: */
38:
39: #if defined(LIBC_SCCS) && !defined(lint)
40: #ifdef notdef
41: .asciz "@(#)strlen.s 8.1 (Berkeley) 6/4/93"
42: #endif
43: .asciz "$NetBSD: strlen.S,v 1.1.1.1 1998/06/20 05:18:14 eeh Exp $"
44: #endif /* LIBC_SCCS and not lint */
45:
46: #include "DEFS.h"
47:
48: ENTRY(strlen)
49: add %o0, 1, %o1 ! save starting point + 1
50: 1:
51: ldsb [%o0], %o2 ! fetch byte
52: tst %o2 ! null?
53: bne 1b ! no, keep going
54: inc %o0 ! always increment pointer
55: retl
56: sub %o0, %o1, %o0 ! return length (ptr - (origptr+1))
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