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dnl Copyright 1999, 2000, 2002, 2003 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
dnl by the Free Software Foundation; either version 3 of the License, or (at
dnl your 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. If not, see http://www.gnu.org/licenses/.
dnl Optimizations:
dnl * Avoid skip instructions
dnl * Put carry-generating and carry-consuming insns consecutively
dnl * Don't allocate any stack, "home" positions for parameteters could be
dnl used.
include(`../config.m4')
define(`p0',`%r28')
define(`p1',`%r29')
define(`t32',`%r19')
define(`t0',`%r20')
define(`t1',`%r21')
define(`x',`%r22')
define(`m0',`%r23')
define(`m1',`%r24')
ifdef(`HAVE_ABI_2_0w',
` .level 2.0w
',` .level 2.0
')
PROLOGUE(mpn_umul_ppmm_r)
ldo 128(%r30),%r30
ifdef(`HAVE_ABI_2_0w',
` std %r26,-64(%r30)
std %r25,-56(%r30)
copy %r24,%r31
',`
depd %r25,31,32,%r26
std %r26,-64(%r30)
depd %r23,31,32,%r24
std %r24,-56(%r30)
ldw -180(%r30),%r31
')
fldd -64(%r30),%fr4
fldd -56(%r30),%fr5
xmpyu %fr5R,%fr4R,%fr6
fstd %fr6,-128(%r30)
xmpyu %fr5R,%fr4L,%fr7
fstd %fr7,-120(%r30)
xmpyu %fr5L,%fr4R,%fr8
fstd %fr8,-112(%r30)
xmpyu %fr5L,%fr4L,%fr9
fstd %fr9,-104(%r30)
depdi,z 1,31,1,t32 C t32 = 2^32
ldd -128(%r30),p0 C lo = low 64 bit of product
ldd -120(%r30),m0 C m0 = mid0 64 bit of product
ldd -112(%r30),m1 C m1 = mid1 64 bit of product
ldd -104(%r30),p1 C hi = high 64 bit of product
add,l,*nuv m0,m1,x C x = m1+m0
add,l t32,p1,p1 C propagate carry to mid of p1
depd,z x,31,32,t0 C lo32(m1+m0)
add t0,p0,p0
extrd,u x,31,32,t1 C hi32(m1+m0)
add,dc t1,p1,p1
std p0,0(%r31) C store low half of product
ifdef(`HAVE_ABI_2_0w',
` copy p1,%r28 C return val in %r28
',` extrd,u p1,31,32,%r28 C return val in %r28,%r29
')
bve (%r2)
ldo -128(%r30),%r30
EPILOGUE(mpn_umul_ppmm_r)
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