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/* $OpenBSD: str.s,v 1.2 2000/05/01 00:12:02 bjc Exp $ */
/* $NetBSD: str.s,v 1.1 1999/03/06 16:36:06 ragge Exp $ */
/*
* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
* 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 at Ludd, University of
* Lule}, Sweden and its contributors.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Small versions of the most common functions not using any
* emulated instructions.
*/
#include "asm.h"
/*
* atoi() used in devopen.
*/
ENTRY(atoi, 0);
movl 4(ap),r1
clrl r0
2: movzbl (r1)+,r2
cmpb r2,$48
blss 1f
cmpb r2,$57
bgtr 1f
subl2 $48,r2
mull2 $10,r0
addl2 r2,r0
brb 2b
1: ret
/*
* index() small and easy.
* doesnt work if we search for null.
*/
ENTRY(index, 0);
movq 4(ap),r0
1: cmpb (r0), r1
beql 2f
tstb (r0)+
bneq 1b
clrl r0
2: ret
/*
* cmpc3 is emulated on MVII.
*/
ENTRY(bcmp, 0);
movl 4(ap), r2
movl 8(ap), r1
movl 12(ap), r0
2: cmpb (r2)+, (r1)+
bneq 1f
decl r0
bneq 2b
1: ret
/*
* Is movc3/movc5 emulated on any CPU? I dont think so; use them here.
*/
ENTRY(bzero,0);
movc5 $0,*4(ap),$0,8(ap),*4(ap)
ret
ENTRY(bcopy,0);
movc3 12(ap), *4(ap), *8(ap)
ret
ENTRY(strlen, 0);
movl 4(ap), r0
1: tstb (r0)+
bneq 1b
decl r0
subl2 4(ap), r0
ret
ENTRY(strncmp, 0)
movl 12(ap), r3
brb 5f
ENTRY(strcmp, 0)
movl $250, r3 # max string len to compare
5: movl 4(ap), r2
movl 8(ap), r1
movl $1, r0
2: cmpb (r2),(r1)+
bneq 1f # something differ
tstb (r2)+
beql 4f # continue, strings unequal
decl r3 # max string len encountered?
bneq 2b
4: clrl r0 # We are done, strings equal.
ret
1: bgtr 3f
mnegl r0, r0
3: ret
ENTRY(strncpy, 0)
movl 4(ap), r1
movl 8(ap), r2
movl 12(ap), r3
bleq 2f
1: movb (r2)+, (r1)+
beql 2f
decl r3
bneq 1b
2: ret
ENTRY(strcat, 0)
pushl 4(ap)
calls $1,_strlen
addl2 4(ap),r0
movl 8(ap),r1
1: movb (r1)+,(r0)+
bneq 1b
ret
ENTRY(setjmp, 0)
movl 4(ap), r0
movl 8(fp), (r0)
movl 12(fp), 4(r0)
movl 16(fp), 8(r0)
addl3 fp,$28,12(r0)
clrl r0
ret
ENTRY(longjmp, 0)
movl 4(ap), r1
movl 8(ap), r0
movl (r1), ap
movl 4(r1), fp
movl 12(r1), sp
jmp *8(r1)
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