blob: 3f28b7b64dac5c3dc06ad5e3fb82bbd5eca64d40 [file] [log] [blame]
/* HP-PA __udiv_qrnnd division support, used from longlong.h.
* This version runs fast on PA 7000 and later.
* Copyright (C) 1993, 1994, 1998,
* 2001, 2002, 2004 Free Software Foundation, Inc.
* This file is part of Libgcrypt.
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
* Note: This code is heavily based on the GNU MP Library.
* Actually it's the same code with only minor changes in the
* way the data is stored; this is to support the abstraction
* of an optional secure memory allocation which may be used
* to avoid revealing of sensitive data due to paging etc.
* rem_ptr gr26
* n1 gr25
* n0 gr24
* d gr23
.level 1.1
.align 8
.label L$0000
.word 0x43f00000
.word 0x0
.export __udiv_qrnnd
.label __udiv_qrnnd
.callinfo frame=64,no_calls
ldo 64(%r30),%r30
stws %r25,-16(0,%r30) ; n_hi
stws %r24,-12(0,%r30) ; n_lo
stw %r19,-32(%r30)
addil LT%L$0000,%r19
ldw RT%L$0000(%r1),%r1
fldds -16(0,%r30),%fr5
stws %r23,-12(0,%r30)
comib,<= 0,%r25,L$1
fcnvxf,dbl,dbl %fr5,%fr5
fldds 0(0,%r1),%fr4
fadd,dbl %fr4,%fr5,%fr5
.label L$1
fcpy,sgl %fr0,%fr6L
fldws -12(0,%r30),%fr6R
fcnvxf,dbl,dbl %fr6,%fr4
fdiv,dbl %fr5,%fr4,%fr5
fcnvfx,dbl,dbl %fr5,%fr4
fstws %fr4R,-16(%r30)
xmpyu %fr4R,%fr6R,%fr6
ldws -16(%r30),%r28
fstds %fr6,-16(0,%r30)
ldws -12(0,%r30),%r21
ldws -16(0,%r30),%r20
sub %r24,%r21,%r22
subb %r25,%r20,%r1
comib,= 0,%r1,L$2
ldo -64(%r30),%r30
add %r22,%r23,%r22
ldo -1(%r28),%r28
.label L$2
bv 0(%r2)
stws %r22,0(0,%r26)