101 lines
2.9 KiB
ArmAsm
101 lines
2.9 KiB
ArmAsm
/* $NetBSD: vaxbsubs.s,v 1.4 2003/08/07 11:16:34 agc 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. 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
|
|
* $NetBSD: vaxbsubs.s,v 1.4 2003/08/07 11:16:34 agc Exp $
|
|
*/
|
|
|
|
/* 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
|