73 lines
2.3 KiB
ArmAsm
73 lines
2.3 KiB
ArmAsm
/* $NetBSD: fpefix.S,v 1.2 1996/03/18 19:58:15 mark Exp $ */
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/*
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* Copyright (c) 1995 Mark Brinicombe.
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* Copyright (c) 1995 Neil Carson.
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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 RiscBSD kernel team.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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* RiscBSD kernel project
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*
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* fpefix.S
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*
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* FP register to integer
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*
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* Created : 11/02/95
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*/
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/* std. registers
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*/
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sp .req r13
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lr .req r14
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pc .req r15
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mant1 .req r0
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xp1 .req r1
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.global _nc_fp_fix
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_nc_fp_fix:
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cmp r0,#0
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moveq pc,r14
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mov xp1,r0,lsr #23
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bic mant1,r0,xp1,lsl #23
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orr mant1,mant1,#1<<23
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tst xp1,#1<<8
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rsbne mant1,mant1,#0
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bic xp1,xp1,#1<<8
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subs xp1,xp1,#127
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movmi r0,#0
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movmi pc,r14
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rsbs xp1,xp1,#23
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movpl mant1,mant1,asr xp1
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rsbmi xp1,xp1,#0
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movmi mant1,mant1,asl xp1
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mov pc,r14
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