| /* SPARC v9 __mpn_mul_1 -- Multiply a limb vector with a single limb and |
| store the product in a second limb vector. |
| |
| Copyright (C) 1995, 1996 Free Software Foundation, Inc. |
| |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or (at your |
| option) any later version. |
| |
| The GNU MP Library is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| MA 02111-1307, USA. */ |
| |
| #include <sysdep.h> |
| |
| |
| /* INPUT PARAMETERS |
| res_ptr o0 |
| s1_ptr o1 |
| size o2 |
| s2_limb o3 */ |
| |
| ENTRY(__mpn_mul_1) |
| !#PROLOGUE# 0 |
| save %sp,-192,%sp |
| !#PROLOGUE# 1 |
| |
| sub %g0,%i2,%o7 |
| sllx %o7,3,%g5 |
| sub %i1,%g5,%o3 |
| sub %i0,%g5,%o4 |
| mov 0,%o0 ! zero cy_limb |
| |
| srl %i3,0,%o1 ! extract low 32 bits of s2_limb |
| srlx %i3,32,%i3 ! extract high 32 bits of s2_limb |
| mov 1,%o2 |
| sllx %o2,32,%o2 ! o2 = 0x100000000 |
| |
| ! hi ! |
| ! mid-1 ! |
| ! mid-2 ! |
| ! lo ! |
| .Loop: |
| sllx %o7,3,%g1 |
| ldx [%o3+%g1],%g5 |
| srl %g5,0,%i0 ! zero hi bits |
| srlx %g5,32,%g5 |
| mulx %o1,%i0,%i4 ! lo product |
| mulx %i3,%i0,%i1 ! mid-1 product |
| mulx %o1,%g5,%l2 ! mid-2 product |
| mulx %i3,%g5,%i5 ! hi product |
| srlx %i4,32,%i0 ! extract high 32 bits of lo product... |
| add %i1,%i0,%i1 ! ...and add it to the mid-1 product |
| addcc %i1,%l2,%i1 ! add mid products |
| mov 0,%l0 ! we need the carry from that add... |
| movcs %xcc,%o2,%l0 ! ...compute it and... |
| add %i5,%l0,%i5 ! ...add to bit 32 of the hi product |
| sllx %i1,32,%i0 ! align low bits of mid product |
| srl %i4,0,%g5 ! zero high 32 bits of lo product |
| add %i0,%g5,%i0 ! combine into low 64 bits of result |
| srlx %i1,32,%i1 ! extract high bits of mid product... |
| add %i5,%i1,%i1 ! ...and add them to the high result |
| addcc %i0,%o0,%i0 ! add cy_limb to low 64 bits of result |
| mov 0,%g5 |
| movcs %xcc,1,%g5 |
| addcc %o7,1,%o7 |
| stx %i0,[%o4+%g1] |
| bne,pt %xcc,.Loop |
| add %i1,%g5,%o0 ! compute new cy_limb |
| |
| jmpl %i7+8,%g0 |
| restore %o0,%g0,%o0 |
| |
| END(__mpn_mul_1) |
