File: [local] / OpenXM_contrib / gmp / mpn / sparc64 / Attic / rshift.asm (download)
Revision 1.1.1.2 (vendor branch), Mon Aug 25 16:06:26 2003 UTC (21 years ago) by ohara
Branch: GMP
CVS Tags: VERSION_4_1_2, RELEASE_1_2_3, RELEASE_1_2_2_KNOPPIX_b, RELEASE_1_2_2_KNOPPIX Changes since 1.1.1.1: +135 -83
lines
Import gmp 4.1.2
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dnl SPARC v9 mpn_rshift
dnl Copyright 1996, 2000, 2001, 2002 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published by
dnl the Free Software Foundation; either version 2.1 of the License, or (at your
dnl option) any later version.
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
dnl License for more details.
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write to
dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
dnl MA 02111-1307, USA.
include(`../config.m4')
C INPUT PARAMETERS
define(`rp',`%i0')
define(`up',`%i1')
define(`n',`%i2')
define(`cnt',`%i3')
define(`u0',`%l0')
define(`u1',`%l2')
define(`u2',`%l4')
define(`u3',`%l6')
define(`tnc',`%i4')
define(`fanop',`fitod %f0,%f2') dnl A quasi nop running in the FA pipe
define(`fmnop',`fmuld %f0,%f0,%f4') dnl A quasi nop running in the FM pipe
ASM_START()
REGISTER(%g2,#scratch)
REGISTER(%g3,#scratch)
PROLOGUE(mpn_rshift)
save %sp,-160,%sp
sub %g0,cnt,tnc C negate shift count
ldx [up],u3 C load first limb
subcc n,5,n
sllx u3,tnc,%i5 C compute function result
srlx u3,cnt,%g3
bl,pn %icc,.Lend1234
fanop
subcc n,4,n
ldx [up+8],u0
ldx [up+16],u1
add up,32,up
ldx [up-8],u2
ldx [up+0],u3
sllx u0,tnc,%g2
bl,pn %icc,.Lend5678
fanop
b,a .Loop
.align 16
.Loop:
srlx u0,cnt,%g1
or %g3,%g2,%g3
ldx [up+8],u0
fanop
C --
sllx u1,tnc,%g2
subcc n,4,n
stx %g3,[rp+0]
fanop
C --
srlx u1,cnt,%g3
or %g1,%g2,%g1
ldx [up+16],u1
fanop
C --
sllx u2,tnc,%g2
stx %g1,[rp+8]
add up,32,up
fanop
C --
srlx u2,cnt,%g1
or %g3,%g2,%g3
ldx [up-8],u2
fanop
C --
sllx u3,tnc,%g2
stx %g3,[rp+16]
add rp,32,rp
fanop
C --
srlx u3,cnt,%g3
or %g1,%g2,%g1
ldx [up+0],u3
fanop
C --
sllx u0,tnc,%g2
stx %g1,[rp-8]
bge,pt %icc,.Loop
fanop
C --
.Lend5678:
srlx u0,cnt,%g1
or %g3,%g2,%g3
sllx u1,tnc,%g2
stx %g3,[rp+0]
srlx u1,cnt,%g3
or %g1,%g2,%g1
sllx u2,tnc,%g2
stx %g1,[rp+8]
srlx u2,cnt,%g1
or %g3,%g2,%g3
sllx u3,tnc,%g2
stx %g3,[rp+16]
add rp,32,rp
srlx u3,cnt,%g3 C carry...
or %g1,%g2,%g1
stx %g1,[rp-8]
.Lend1234:
addcc n,4,n
bz,pn %icc,.Lret
fanop
.Loop0:
add rp,8,rp
subcc n,1,n
ldx [up+8],u3
add up,8,up
sllx u3,tnc,%g2
or %g3,%g2,%g3
stx %g3,[rp-8]
srlx u3,cnt,%g3
bnz,pt %icc,.Loop0
fanop
.Lret:
stx %g3,[rp+0]
mov %i5,%i0
ret
restore
EPILOGUE(mpn_rshift)