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216 lines
3.7 KiB
ArmAsm
216 lines
3.7 KiB
ArmAsm
! SPARC __udiv_qrnnd division support, used from longlong.h.
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! Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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! This file is part of the GNU MP Library.
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! The GNU MP Library is free software; you can redistribute it and/or modify
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! it under the terms of the GNU Lesser General Public License as published by
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! the Free Software Foundation; either version 2.1 of the License, or (at your
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! option) any later version.
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! The GNU MP Library is distributed in the hope that it will be useful, but
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! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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! License for more details.
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! You should have received a copy of the GNU Lesser General Public License
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! along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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! the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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! INPUT PARAMETERS
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! rem_ptr o0
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! n1 o1
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! n0 o2
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! d o3
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#include "sysdep.h"
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ENTRY(__udiv_qrnnd)
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tst %o3
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bneg LOC(largedivisor)
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mov 8,%g1
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b LOC(p1)
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addxcc %o2,%o2,%o2
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LOC(plop):
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bcc LOC(n1)
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addxcc %o2,%o2,%o2
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LOC(p1):
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addx %o1,%o1,%o1
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subcc %o1,%o3,%o4
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bcc LOC(n2)
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addxcc %o2,%o2,%o2
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LOC(p2):
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addx %o1,%o1,%o1
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subcc %o1,%o3,%o4
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bcc LOC(n3)
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addxcc %o2,%o2,%o2
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LOC(p3):
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addx %o1,%o1,%o1
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subcc %o1,%o3,%o4
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bcc LOC(n4)
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addxcc %o2,%o2,%o2
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LOC(p4):
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addx %o1,%o1,%o1
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addcc %g1,-1,%g1
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bne LOC(plop)
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subcc %o1,%o3,%o4
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bcc LOC(n5)
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addxcc %o2,%o2,%o2
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LOC(p5):
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st %o1,[%o0]
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retl
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xnor %g0,%o2,%o0
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LOC(nlop):
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bcc LOC(p1)
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addxcc %o2,%o2,%o2
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LOC(n1):
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addx %o4,%o4,%o4
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subcc %o4,%o3,%o1
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bcc LOC(p2)
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addxcc %o2,%o2,%o2
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LOC(n2):
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addx %o4,%o4,%o4
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subcc %o4,%o3,%o1
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bcc LOC(p3)
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addxcc %o2,%o2,%o2
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LOC(n3):
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addx %o4,%o4,%o4
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subcc %o4,%o3,%o1
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bcc LOC(p4)
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addxcc %o2,%o2,%o2
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LOC(n4):
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addx %o4,%o4,%o4
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addcc %g1,-1,%g1
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bne LOC(nlop)
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subcc %o4,%o3,%o1
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bcc LOC(p5)
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addxcc %o2,%o2,%o2
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LOC(n5):
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st %o4,[%o0]
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retl
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xnor %g0,%o2,%o0
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LOC(largedivisor):
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and %o2,1,%o5 ! %o5 = n0 & 1
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srl %o2,1,%o2
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sll %o1,31,%g2
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or %g2,%o2,%o2 ! %o2 = lo(n1n0 >> 1)
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srl %o1,1,%o1 ! %o1 = hi(n1n0 >> 1)
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and %o3,1,%g2
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srl %o3,1,%g3 ! %g3 = floor(d / 2)
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add %g3,%g2,%g3 ! %g3 = ceil(d / 2)
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b LOC(Lp1)
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addxcc %o2,%o2,%o2
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LOC(Lplop):
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bcc LOC(Ln1)
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addxcc %o2,%o2,%o2
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LOC(Lp1):
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addx %o1,%o1,%o1
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subcc %o1,%g3,%o4
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bcc LOC(Ln2)
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addxcc %o2,%o2,%o2
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LOC(Lp2):
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addx %o1,%o1,%o1
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subcc %o1,%g3,%o4
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bcc LOC(Ln3)
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addxcc %o2,%o2,%o2
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LOC(Lp3):
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addx %o1,%o1,%o1
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subcc %o1,%g3,%o4
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bcc LOC(Ln4)
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addxcc %o2,%o2,%o2
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LOC(Lp4):
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addx %o1,%o1,%o1
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addcc %g1,-1,%g1
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bne LOC(Lplop)
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subcc %o1,%g3,%o4
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bcc LOC(Ln5)
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addxcc %o2,%o2,%o2
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LOC(Lp5):
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add %o1,%o1,%o1 ! << 1
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tst %g2
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bne LOC(Oddp)
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add %o5,%o1,%o1
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st %o1,[%o0]
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retl
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xnor %g0,%o2,%o0
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LOC(Lnlop):
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bcc LOC(Lp1)
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addxcc %o2,%o2,%o2
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LOC(Ln1):
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addx %o4,%o4,%o4
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subcc %o4,%g3,%o1
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bcc LOC(Lp2)
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addxcc %o2,%o2,%o2
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LOC(Ln2):
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addx %o4,%o4,%o4
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subcc %o4,%g3,%o1
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bcc LOC(Lp3)
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addxcc %o2,%o2,%o2
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LOC(Ln3):
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addx %o4,%o4,%o4
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subcc %o4,%g3,%o1
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bcc LOC(Lp4)
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addxcc %o2,%o2,%o2
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LOC(Ln4):
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addx %o4,%o4,%o4
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addcc %g1,-1,%g1
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bne LOC(Lnlop)
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subcc %o4,%g3,%o1
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bcc LOC(Lp5)
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addxcc %o2,%o2,%o2
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LOC(Ln5):
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add %o4,%o4,%o4 ! << 1
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tst %g2
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bne LOC(Oddn)
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add %o5,%o4,%o4
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st %o4,[%o0]
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retl
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xnor %g0,%o2,%o0
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LOC(Oddp):
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xnor %g0,%o2,%o2
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! q' in %o2. r' in %o1
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addcc %o1,%o2,%o1
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bcc LOC(Lp6)
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addx %o2,0,%o2
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sub %o1,%o3,%o1
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LOC(Lp6):
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subcc %o1,%o3,%g0
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bcs LOC(Lp7)
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subx %o2,-1,%o2
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sub %o1,%o3,%o1
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LOC(Lp7):
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st %o1,[%o0]
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retl
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mov %o2,%o0
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LOC(Oddn):
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xnor %g0,%o2,%o2
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! q' in %o2. r' in %o4
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addcc %o4,%o2,%o4
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bcc LOC(Ln6)
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addx %o2,0,%o2
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sub %o4,%o3,%o4
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LOC(Ln6):
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subcc %o4,%o3,%g0
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bcs LOC(Ln7)
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subx %o2,-1,%o2
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sub %o4,%o3,%o4
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LOC(Ln7):
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st %o4,[%o0]
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retl
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mov %o2,%o0
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END(__udiv_qrnnd)
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