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/* * $OpenBSD: vaxbsubs.s,v 1.2 1996/06/26 05:41:27 deraadt Exp $*/
/*-
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)vaxbsubs.s 4.2 (Berkeley) 4/26/91
*/
/* This is taken from bcmp.s from 4.2.
* The output of bunequal is the offset of the byte which didn't match;
* if all the bytes match, then we return n.
*
* BUGNOTE: This has no chance of working for lengths greater than 64K.
* (so, if you use this somewhere else, you may need to
* fix it...)
*/
/* bunequal(s1, s2, n) */
#include "defs.h"
ENTRY(bunequal)
movl 4(ap),r1
movl 8(ap),r3
movl 12(ap),r4
1:
movzwl $65535,r0
cmpl r4,r0
jleq 2f
subl2 r0,r4
cmpc3 r0,(r1),(r3)
jeql 1b
addl2 r4,r0
/* changes... */
subl3 r0,12(ap),r0
/* end of changes for bunequal... */
ret
2:
cmpc3 r4,(r1),(r3)
/* changes... */
subl3 r0,12(ap),r0
/* end of changes for bunequal... */
ret
/* brand new code, using the above as base... */
/* bskip(s1, n, b) : finds the first occurrence of any byte != 'b' in the 'n'
* bytes beginning at 's1'.
*
* BUGNOTE: This has no chance of working for lengths greater than 64K.
* (so, if you use this somewhere else, you may need to
* fix it...)
*/
ENTRY(bskip)
movl 4(ap),r1
movl 8(ap),r3
movl 12(ap),r4
1:
movzwl $65535,r0
cmpl r3,r0
jleq 2f
subl2 r0,r3
skpc r4,r0,(r1)
jeql 1b
addl2 r3,r0
subl3 r0,8(ap),r0
ret
2:
skpc r4,r3,(r1)
subl3 r0,8(ap),r0
ret
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