8fa1cdb04b
To make this work nice, big changes to the boot unit handling was also required. From now only DEC HW unit numbering are used in boot, to easy match boot device in kernel.
131 lines
3.1 KiB
ArmAsm
131 lines
3.1 KiB
ArmAsm
/* $NetBSD: str.s,v 1.3 1997/03/15 13:04:30 ragge Exp $ */
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/*
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* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
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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 at Ludd, University of
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* Lule}, Sweden and its contributors.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Small versions of the most common functions not using any
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* emulated instructions.
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*/
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#include "../include/asm.h"
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/*
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* atoi() used in devopen.
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*/
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ENTRY(atoi, 0);
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movl 4(ap),r1
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clrl r0
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2: movzbl (r1)+,r2
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cmpb r2,$48
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blss 1f
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cmpb r2,$57
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bgtr 1f
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subl2 $48,r2
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mull2 $10,r0
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addl2 r2,r0
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brb 2b
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1: ret
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/*
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* index() small and easy.
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* doesnt work if we search for null.
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*/
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ENTRY(index, 0);
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movq 4(ap),r0
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1: cmpb (r0), r1
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beql 2f
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tstb (r0)+
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bneq 1b
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clrl r0
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2: ret
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/*
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* cmpc3 is emulated on MVII.
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*/
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ENTRY(bcmp, 0);
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movl 4(ap), r2
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movl 8(ap), r1
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movl 12(ap), r0
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2: cmpb (r2)+, (r1)+
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bneq 1f
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decl r0
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bneq 2b
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1: ret
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/*
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* Is movc3/movc5 emulated on any CPU? I dont think so; use them here.
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*/
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ENTRY(bzero,0);
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movl 4(ap), r0
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movl 8(ap), r1
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movc5 $0,(r0),$0,r1,(r0)
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ret
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ENTRY(bcopy,0);
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movl 4(ap), r0
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movl 8(ap), r1
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movl 12(ap), r2
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movc3 r2, (r0), (r1)
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ret
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ENTRY(strlen, 0);
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movl 4(ap), r0
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1: tstb (r0)+
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bneq 1b
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decl r0
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subl2 4(ap), r0
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ret
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ENTRY(strncmp, 0)
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movl 12(ap), r3
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brb 5f
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ENTRY(strcmp, 0)
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movl $250, r3 # max string len to compare
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5: movl 4(ap), r2
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movl 8(ap), r1
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movl $1, r0
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2: cmpb (r2),(r1)+
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bneq 1f # something differ
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tstb (r2)+
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beql 4f # continue, strings unequal
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decl r3 # max string len encountered?
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bneq 2b
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4: clrl r0 # We are done, strings equal.
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ret
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1: bgtr 3f
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mnegl r0, r0
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3: ret
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