72 lines
2.1 KiB
ArmAsm
72 lines
2.1 KiB
ArmAsm
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/* $NetBSD: strcmp.S,v 1.2 2008/04/28 20:22:52 martin Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Hiroshi Horimoto <horimoto@cs-aoi.cs.sist.ac.jp> and
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* by J.T. Conklin <jtc@NetBSD.org>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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RCSID("$NetBSD: strcmp.S,v 1.2 2008/04/28 20:22:52 martin Exp $")
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#endif /* LIBC_SCCS and not lint */
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ENTRY(strcmp)
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movl %sp@(4),%a0
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movl %sp@(8),%a1
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L1: /* unrolled by 4 for 680[23]0's */
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movb %a0@+,%d1
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jeq L2
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subb %a1@+,%d1
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jne L3
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movb %a0@+,%d1
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jeq L2
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subb %a1@+,%d1
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jne L3
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movb %a0@+,%d1
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jeq L2
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subb %a1@+,%d1
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jne L3
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movb %a0@+,%d1
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jeq L2
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subb %a1@+,%d1
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jeq L1
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L3: scs %d0
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EXTBL(%d0)
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movb %d1,%d0
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rts
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L2: movq #0,%d0
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movb %a1@,%d0
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negl %d0
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rts
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