1*4b2da9c3SPulkoMandy/* SPARC v9 __mpn_submul_1 -- Multiply a limb vector with a single limb and 2*4b2da9c3SPulkoMandy subtract the product from a second limb vector. 3*4b2da9c3SPulkoMandy 4*4b2da9c3SPulkoMandy Copyright (C) 1996-2018 Free Software Foundation, Inc. 5*4b2da9c3SPulkoMandy 6*4b2da9c3SPulkoMandy This file is part of the GNU MP Library. 7*4b2da9c3SPulkoMandy 8*4b2da9c3SPulkoMandy The GNU MP Library is free software; you can redistribute it and/or modify 9*4b2da9c3SPulkoMandy it under the terms of the GNU Lesser General Public License as published by 10*4b2da9c3SPulkoMandy the Free Software Foundation; either version 2.1 of the License, or (at your 11*4b2da9c3SPulkoMandy option) any later version. 12*4b2da9c3SPulkoMandy 13*4b2da9c3SPulkoMandy The GNU MP Library is distributed in the hope that it will be useful, but 14*4b2da9c3SPulkoMandy WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15*4b2da9c3SPulkoMandy or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16*4b2da9c3SPulkoMandy License for more details. 17*4b2da9c3SPulkoMandy 18*4b2da9c3SPulkoMandy You should have received a copy of the GNU Lesser General Public License 19*4b2da9c3SPulkoMandy along with the GNU MP Library; see the file COPYING.LIB. If not, 20*4b2da9c3SPulkoMandy see <http://www.gnu.org/licenses/>. */ 21*4b2da9c3SPulkoMandy 22*4b2da9c3SPulkoMandy#include <sysdep.h> 23*4b2da9c3SPulkoMandy 24*4b2da9c3SPulkoMandy 25*4b2da9c3SPulkoMandy/* INPUT PARAMETERS 26*4b2da9c3SPulkoMandy res_ptr o0 27*4b2da9c3SPulkoMandy s1_ptr o1 28*4b2da9c3SPulkoMandy size o2 29*4b2da9c3SPulkoMandy s2_limb o3 */ 30*4b2da9c3SPulkoMandy 31*4b2da9c3SPulkoMandyENTRY(__mpn_submul_1) 32*4b2da9c3SPulkoMandy save %sp,-192,%sp 33*4b2da9c3SPulkoMandy 34*4b2da9c3SPulkoMandy sub %g0,%i2,%o7 35*4b2da9c3SPulkoMandy mov 0,%o0 ! zero cy_limb 36*4b2da9c3SPulkoMandy sllx %o7,3,%o7 37*4b2da9c3SPulkoMandy sethi %hi(0x80000000),%o2 38*4b2da9c3SPulkoMandy srl %i3,0,%o1 ! extract low 32 bits of s2_limb 39*4b2da9c3SPulkoMandy sub %i1,%o7,%o3 40*4b2da9c3SPulkoMandy srlx %i3,32,%i3 ! extract high 32 bits of s2_limb 41*4b2da9c3SPulkoMandy sub %i0,%o7,%o4 42*4b2da9c3SPulkoMandy add %o2,%o2,%o2 ! o2 = 0x100000000 43*4b2da9c3SPulkoMandy 44*4b2da9c3SPulkoMandy ! hi ! 45*4b2da9c3SPulkoMandy ! mid-1 ! 46*4b2da9c3SPulkoMandy ! mid-2 ! 47*4b2da9c3SPulkoMandy ! lo ! 48*4b2da9c3SPulkoMandy1: 49*4b2da9c3SPulkoMandy ldx [%o3+%o7],%g5 50*4b2da9c3SPulkoMandy srl %g5,0,%i0 ! zero hi bits 51*4b2da9c3SPulkoMandy ldx [%o4+%o7],%l1 52*4b2da9c3SPulkoMandy srlx %g5,32,%g5 53*4b2da9c3SPulkoMandy mulx %o1,%i0,%i4 ! lo product 54*4b2da9c3SPulkoMandy mulx %i3,%i0,%i1 ! mid-1 product 55*4b2da9c3SPulkoMandy mulx %o1,%g5,%l2 ! mid-2 product 56*4b2da9c3SPulkoMandy mulx %i3,%g5,%i5 ! hi product 57*4b2da9c3SPulkoMandy srlx %i4,32,%i0 ! extract high 32 bits of lo product... 58*4b2da9c3SPulkoMandy add %i1,%i0,%i1 ! ...and add it to the mid-1 product 59*4b2da9c3SPulkoMandy addcc %i1,%l2,%i1 ! add mid products 60*4b2da9c3SPulkoMandy mov 0,%l0 ! we need the carry from that add... 61*4b2da9c3SPulkoMandy movcs %xcc,%o2,%l0 ! ...compute it and... 62*4b2da9c3SPulkoMandy sllx %i1,32,%i0 ! align low bits of mid product 63*4b2da9c3SPulkoMandy add %i5,%l0,%i5 ! ...add to bit 32 of the hi product 64*4b2da9c3SPulkoMandy srl %i4,0,%g5 ! zero high 32 bits of lo product 65*4b2da9c3SPulkoMandy add %i0,%g5,%i0 ! combine into low 64 bits of result 66*4b2da9c3SPulkoMandy srlx %i1,32,%i1 ! extract high bits of mid product... 67*4b2da9c3SPulkoMandy addcc %i0,%o0,%i0 ! add cy_limb to low 64 bits of result 68*4b2da9c3SPulkoMandy add %i5,%i1,%i1 ! ...and add them to the high result 69*4b2da9c3SPulkoMandy mov 0,%g5 70*4b2da9c3SPulkoMandy movcs %xcc,1,%g5 71*4b2da9c3SPulkoMandy subcc %l1,%i0,%i0 72*4b2da9c3SPulkoMandy stx %i0,[%o4+%o7] 73*4b2da9c3SPulkoMandy add %g5,1,%l1 74*4b2da9c3SPulkoMandy movcs %xcc,%l1,%g5 75*4b2da9c3SPulkoMandy addcc %o7,8,%o7 76*4b2da9c3SPulkoMandy bne,pt %xcc,1b 77*4b2da9c3SPulkoMandy add %i1,%g5,%o0 ! compute new cy_limb 78*4b2da9c3SPulkoMandy 79*4b2da9c3SPulkoMandy jmpl %i7+8, %g0 80*4b2da9c3SPulkoMandy restore %o0,%g0,%o0 81*4b2da9c3SPulkoMandy 82*4b2da9c3SPulkoMandyEND(__mpn_submul_1) 83