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! SPARC v7 __udiv_qrnnd division support, used from longlong.h.
! This is for v7 CPUs without a floating-point unit.
! Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
! This file is part of the GNU MP Library.
! The GNU MP Library is free software; you can redistribute it and/or modify
! it under the terms of the GNU Library General Public License as published by
! the Free Software Foundation; either version 2 of the License, or (at your
! option) any later version.
! The GNU MP Library is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
! License for more details.
! You should have received a copy of the GNU Library General Public License
! along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! MA 02111-1307, USA.
! INPUT PARAMETERS
! rem_ptr o0
! n1 o1
! n0 o2
! d o3
#include "sysdep.h"
.text
.align 4
.global C_SYMBOL_NAME(__udiv_qrnnd)
C_SYMBOL_NAME(__udiv_qrnnd):
tst %o3
bneg Largedivisor
mov 8,%g1
b Lp1
addxcc %o2,%o2,%o2
Lplop: bcc Ln1
addxcc %o2,%o2,%o2
Lp1: addx %o1,%o1,%o1
subcc %o1,%o3,%o4
bcc Ln2
addxcc %o2,%o2,%o2
Lp2: addx %o1,%o1,%o1
subcc %o1,%o3,%o4
bcc Ln3
addxcc %o2,%o2,%o2
Lp3: addx %o1,%o1,%o1
subcc %o1,%o3,%o4
bcc Ln4
addxcc %o2,%o2,%o2
Lp4: addx %o1,%o1,%o1
addcc %g1,-1,%g1
bne Lplop
subcc %o1,%o3,%o4
bcc Ln5
addxcc %o2,%o2,%o2
Lp5: st %o1,[%o0]
retl
xnor %g0,%o2,%o0
Lnlop: bcc Lp1
addxcc %o2,%o2,%o2
Ln1: addx %o4,%o4,%o4
subcc %o4,%o3,%o1
bcc Lp2
addxcc %o2,%o2,%o2
Ln2: addx %o4,%o4,%o4
subcc %o4,%o3,%o1
bcc Lp3
addxcc %o2,%o2,%o2
Ln3: addx %o4,%o4,%o4
subcc %o4,%o3,%o1
bcc Lp4
addxcc %o2,%o2,%o2
Ln4: addx %o4,%o4,%o4
addcc %g1,-1,%g1
bne Lnlop
subcc %o4,%o3,%o1
bcc Lp5
addxcc %o2,%o2,%o2
Ln5: st %o4,[%o0]
retl
xnor %g0,%o2,%o0
Largedivisor:
and %o2,1,%o5 ! %o5 = n0 & 1
srl %o2,1,%o2
sll %o1,31,%g2
or %g2,%o2,%o2 ! %o2 = lo(n1n0 >> 1)
srl %o1,1,%o1 ! %o1 = hi(n1n0 >> 1)
and %o3,1,%g2
srl %o3,1,%g3 ! %g3 = floor(d / 2)
add %g3,%g2,%g3 ! %g3 = ceil(d / 2)
b LLp1
addxcc %o2,%o2,%o2
LLplop: bcc LLn1
addxcc %o2,%o2,%o2
LLp1: addx %o1,%o1,%o1
subcc %o1,%g3,%o4
bcc LLn2
addxcc %o2,%o2,%o2
LLp2: addx %o1,%o1,%o1
subcc %o1,%g3,%o4
bcc LLn3
addxcc %o2,%o2,%o2
LLp3: addx %o1,%o1,%o1
subcc %o1,%g3,%o4
bcc LLn4
addxcc %o2,%o2,%o2
LLp4: addx %o1,%o1,%o1
addcc %g1,-1,%g1
bne LLplop
subcc %o1,%g3,%o4
bcc LLn5
addxcc %o2,%o2,%o2
LLp5: add %o1,%o1,%o1 ! << 1
tst %g2
bne Oddp
add %o5,%o1,%o1
st %o1,[%o0]
retl
xnor %g0,%o2,%o0
LLnlop: bcc LLp1
addxcc %o2,%o2,%o2
LLn1: addx %o4,%o4,%o4
subcc %o4,%g3,%o1
bcc LLp2
addxcc %o2,%o2,%o2
LLn2: addx %o4,%o4,%o4
subcc %o4,%g3,%o1
bcc LLp3
addxcc %o2,%o2,%o2
LLn3: addx %o4,%o4,%o4
subcc %o4,%g3,%o1
bcc LLp4
addxcc %o2,%o2,%o2
LLn4: addx %o4,%o4,%o4
addcc %g1,-1,%g1
bne LLnlop
subcc %o4,%g3,%o1
bcc LLp5
addxcc %o2,%o2,%o2
LLn5: add %o4,%o4,%o4 ! << 1
tst %g2
bne Oddn
add %o5,%o4,%o4
st %o4,[%o0]
retl
xnor %g0,%o2,%o0
Oddp: xnor %g0,%o2,%o2
! q' in %o2. r' in %o1
addcc %o1,%o2,%o1
bcc LLp6
addx %o2,0,%o2
sub %o1,%o3,%o1
LLp6: subcc %o1,%o3,%g0
bcs LLp7
subx %o2,-1,%o2
sub %o1,%o3,%o1
LLp7: st %o1,[%o0]
retl
mov %o2,%o0
Oddn: xnor %g0,%o2,%o2
! q' in %o2. r' in %o4
addcc %o4,%o2,%o4
bcc LLn6
addx %o2,0,%o2
sub %o4,%o3,%o4
LLn6: subcc %o4,%o3,%g0
bcs LLn7
subx %o2,-1,%o2
sub %o4,%o3,%o4
LLn7: st %o4,[%o0]
retl
mov %o2,%o0
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