| 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) |
| |
