91 lines
2.5 KiB
NASM
91 lines
2.5 KiB
NASM
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dnl Copyright 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU Lesser General Public License as published
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dnl by the Free Software Foundation; either version 2.1 of the License, or (at
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dnl your option) any later version.
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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dnl License for more details.
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dnl You should have received a copy of the GNU Lesser General Public License
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dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write
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dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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dnl Boston, MA 02110-1301, USA.
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dnl Optimizations:
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dnl * Avoid skip instructions
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dnl * Put carry-generating and carry-consuming insns consecutively
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dnl * Don't allocate any stack, "home" positions for parameteters could be
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dnl used.
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include(`../config.m4')
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define(`p0',`%r28')
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define(`p1',`%r29')
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define(`t32',`%r19')
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define(`t0',`%r20')
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define(`t1',`%r21')
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define(`x',`%r22')
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define(`m0',`%r23')
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define(`m1',`%r24')
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ifdef(`HAVE_ABI_2_0w',
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` .level 2.0w
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',` .level 2.0
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')
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PROLOGUE(mpn_umul_ppmm_r)
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ldo 128(%r30),%r30
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ifdef(`HAVE_ABI_2_0w',
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` std %r26,-64(%r30)
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std %r25,-56(%r30)
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copy %r24,%r31
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',`
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depd %r25,31,32,%r26
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std %r26,-64(%r30)
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depd %r23,31,32,%r24
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std %r24,-56(%r30)
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ldw -180(%r30),%r31
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')
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fldd -64(%r30),%fr4
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fldd -56(%r30),%fr5
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xmpyu %fr5R,%fr4R,%fr6
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fstd %fr6,-128(%r30)
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xmpyu %fr5R,%fr4L,%fr7
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fstd %fr7,-120(%r30)
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xmpyu %fr5L,%fr4R,%fr8
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fstd %fr8,-112(%r30)
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xmpyu %fr5L,%fr4L,%fr9
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fstd %fr9,-104(%r30)
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depdi,z 1,31,1,t32 C t32 = 2^32
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ldd -128(%r30),p0 C lo = low 64 bit of product
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ldd -120(%r30),m0 C m0 = mid0 64 bit of product
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ldd -112(%r30),m1 C m1 = mid1 64 bit of product
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ldd -104(%r30),p1 C hi = high 64 bit of product
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add,l,*nuv m0,m1,x C x = m1+m0
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add,l t32,p1,p1 C propagate carry to mid of p1
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depd,z x,31,32,t0 C lo32(m1+m0)
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add t0,p0,p0
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extrd,u x,31,32,t1 C hi32(m1+m0)
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add,dc t1,p1,p1
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std p0,0(%r31) C store low half of product
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ifdef(`HAVE_ABI_2_0w',
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` copy p1,%r28 C return val in %r28
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',` extrd,u p1,31,32,%r28 C return val in %r28,%r29
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')
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bve (%r2)
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ldo -128(%r30),%r30
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EPILOGUE(mpn_umul_ppmm_r)
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