?? rshift.s
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! sparc __mpn_rshift --!! Copyright (C) 1995, 1996, 1997 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.! INPUT PARAMETERS! RES_PTR %o0! SRC_PTR %o1! SIZE %o2! CNT %o3#include <sysdep.h>ENTRY(__mpn_rshift) ld [%o1],%g2 ! load first limb sub %g0,%o3,%o5 ! negate shift count add %o2,-1,%o2 andcc %o2,4-1,%g4 ! number of limbs in first loop sll %g2,%o5,%g1 ! compute function result be LOC(0) ! if multiple of 4 limbs, skip first loop st %g1,[%sp+80] sub %o2,%g4,%o2 ! adjust count for main loopLOC(loop0): ld [%o1+4],%g3 add %o0,4,%o0 add %o1,4,%o1 addcc %g4,-1,%g4 srl %g2,%o3,%o4 sll %g3,%o5,%g1 mov %g3,%g2 or %o4,%g1,%o4 bne LOC(loop0) st %o4,[%o0-4]LOC(0): tst %o2 be LOC(end) nopLOC(loop): ld [%o1+4],%g3 add %o0,16,%o0 addcc %o2,-4,%o2 srl %g2,%o3,%o4 sll %g3,%o5,%g1 ld [%o1+8],%g2 srl %g3,%o3,%g4 or %o4,%g1,%o4 st %o4,[%o0-16] sll %g2,%o5,%g1 ld [%o1+12],%g3 srl %g2,%o3,%o4 or %g4,%g1,%g4 st %g4,[%o0-12] sll %g3,%o5,%g1 ld [%o1+16],%g2 srl %g3,%o3,%g4 or %o4,%g1,%o4 st %o4,[%o0-8] sll %g2,%o5,%g1 add %o1,16,%o1 or %g4,%g1,%g4 bne LOC(loop) st %g4,[%o0-4]LOC(end): srl %g2,%o3,%g2 st %g2,[%o0-0] retl ld [%sp+80],%o0END(__mpn_rshift)
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