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92 lines
2.4 KiB
ArmAsm
92 lines
2.4 KiB
ArmAsm
/* HP-PA __udiv_qrnnd division support, used from longlong.h.
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* This version runs fast on PA 7000 and later.
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*
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* Copyright (C) 1993, 1994, 1998,
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* 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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* Note: This code is heavily based on the GNU MP Library.
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* Actually it's the same code with only minor changes in the
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* way the data is stored; this is to support the abstraction
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* of an optional secure memory allocation which may be used
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* to avoid revealing of sensitive data due to paging etc.
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* The GNU MP Library itself is published under the LGPL;
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* however I decided to publish this code under the plain GPL.
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*/
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/* INPUT PARAMETERS
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* rem_ptr gr26
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* n1 gr25
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* n0 gr24
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* d gr23
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*/
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.code
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.align 8
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.label L$0000
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.word 0x43f00000
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.word 0x0
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.export __udiv_qrnnd
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.label __udiv_qrnnd
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.proc
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.callinfo frame=64,no_calls
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.entry
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ldo 64(%r30),%r30
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stws %r25,-16(0,%r30) ; n_hi
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stws %r24,-12(0,%r30) ; n_lo
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ldil L'L$0000,%r19 ; '
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ldo R'L$0000(%r19),%r19 ; '
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fldds -16(0,%r30),%fr5
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stws %r23,-12(0,%r30)
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comib,<= 0,%r25,L$1
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fcnvxf,dbl,dbl %fr5,%fr5
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fldds 0(0,%r19),%fr4
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fadd,dbl %fr4,%fr5,%fr5
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.label L$1
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fcpy,sgl %fr0,%fr6L
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fldws -12(0,%r30),%fr6R
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fcnvxf,dbl,dbl %fr6,%fr4
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fdiv,dbl %fr5,%fr4,%fr5
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fcnvfx,dbl,dbl %fr5,%fr4
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fstws %fr4R,-16(%r30)
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xmpyu %fr4R,%fr6R,%fr6
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ldws -16(%r30),%r28
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fstds %fr6,-16(0,%r30)
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ldws -12(0,%r30),%r21
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ldws -16(0,%r30),%r20
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sub %r24,%r21,%r22
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subb %r25,%r20,%r19
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comib,= 0,%r19,L$2
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ldo -64(%r30),%r30
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add %r22,%r23,%r22
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ldo -1(%r28),%r28
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.label L$2
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bv 0(%r2)
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stws %r22,0(0,%r26)
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.exit
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.procend
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