105 lines
3.2 KiB
ArmAsm
105 lines
3.2 KiB
ArmAsm
/* $NetBSD: vaxbsubs.s,v 1.3 1997/01/09 20:22:23 tls Exp $ */
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/*-
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* Copyright (c) 1988 The Regents of the University of California.
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)vaxbsubs.s 4.2 (Berkeley) 4/26/91
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* $NetBSD: vaxbsubs.s,v 1.3 1997/01/09 20:22:23 tls Exp $
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*/
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/* This is taken from bcmp.s from 4.2.
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* The output of bunequal is the offset of the byte which didn't match;
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* if all the bytes match, then we return n.
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*
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* BUGNOTE: This has no chance of working for lengths greater than 64K.
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* (so, if you use this somewhere else, you may need to
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* fix it...)
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*/
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/* bunequal(s1, s2, n) */
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#include "defs.h"
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ENTRY(bunequal)
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movl 4(ap),r1
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movl 8(ap),r3
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movl 12(ap),r4
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1:
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movzwl $65535,r0
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cmpl r4,r0
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jleq 2f
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subl2 r0,r4
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cmpc3 r0,(r1),(r3)
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jeql 1b
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addl2 r4,r0
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/* changes... */
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subl3 r0,12(ap),r0
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/* end of changes for bunequal... */
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ret
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2:
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cmpc3 r4,(r1),(r3)
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/* changes... */
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subl3 r0,12(ap),r0
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/* end of changes for bunequal... */
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ret
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/* brand new code, using the above as base... */
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/* bskip(s1, n, b) : finds the first occurrence of any byte != 'b' in the 'n'
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* bytes beginning at 's1'.
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*
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* BUGNOTE: This has no chance of working for lengths greater than 64K.
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* (so, if you use this somewhere else, you may need to
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* fix it...)
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*/
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ENTRY(bskip)
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movl 4(ap),r1
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movl 8(ap),r3
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movl 12(ap),r4
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1:
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movzwl $65535,r0
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cmpl r3,r0
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jleq 2f
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subl2 r0,r3
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skpc r4,r0,(r1)
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jeql 1b
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addl2 r3,r0
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subl3 r0,8(ap),r0
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ret
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2:
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skpc r4,r3,(r1)
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subl3 r0,8(ap),r0
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ret
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