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@@ -0,0 +1,440 @@
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+{
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+ $Id$
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+ Copyright (c) 2000-2002 by Florian Klaempfl and Jonas Maebe
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+
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+ Code generation for add nodes on the Motorola 680x0 family
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 2 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program; if not, write to the Free Software
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+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+
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+ ****************************************************************************
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+}
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+unit ncpuadd;
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+
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+{$i fpcdefs.inc}
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+
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+interface
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+
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+ uses
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+ node,nadd,ncgadd,cpubase,cginfo;
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+
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+
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+ type
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+ t68kaddnode = class(tcgaddnode)
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+ procedure second_cmpordinal;override;
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+ procedure second_cmpsmallset;override;
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+ procedure second_cmp64bit;override;
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+ procedure second_cmpboolean;override;
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+ private
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+ function getresflags(unsigned: boolean) : tresflags;
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+ end;
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+
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+
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+implementation
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+
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+ uses
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+ globtype,systems,
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+ cutils,verbose,globals,
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+ symconst,symdef,paramgr,
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+ aasmbase,aasmtai,aasmcpu,defutil,htypechk,
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+ cgbase,cpuinfo,pass_1,pass_2,regvars,
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+ cpupara,
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+ ncon,nset,
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+ ncgutil,tgobj,rgobj,rgcpu,cgobj,cg64f32;
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+
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+{*****************************************************************************
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+ Helpers
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+*****************************************************************************}
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+
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+
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+ function t68kaddnode.getresflags(unsigned : boolean) : tresflags;
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+ begin
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+ case nodetype of
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+ equaln : getresflags:=F_E;
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+ unequaln : getresflags:=F_NE;
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+ else
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+ if not(unsigned) then
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+ begin
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+ if nf_swaped in flags then
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+ case nodetype of
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+ ltn : getresflags:=F_G;
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+ lten : getresflags:=F_GE;
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+ gtn : getresflags:=F_L;
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+ gten : getresflags:=F_LE;
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+ end
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+ else
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+ case nodetype of
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+ ltn : getresflags:=F_L;
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+ lten : getresflags:=F_LE;
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+ gtn : getresflags:=F_G;
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+ gten : getresflags:=F_GE;
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+ end;
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+ end
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+ else
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+ begin
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+ if nf_swaped in flags then
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+ case nodetype of
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+ ltn : getresflags:=F_A;
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+ lten : getresflags:=F_AE;
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+ gtn : getresflags:=F_B;
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+ gten : getresflags:=F_BE;
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+ end
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+ else
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+ case nodetype of
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+ ltn : getresflags:=F_B;
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+ lten : getresflags:=F_BE;
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+ gtn : getresflags:=F_A;
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+ gten : getresflags:=F_AE;
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+ end;
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+ end;
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+ end;
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+ end;
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+
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+{*****************************************************************************
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+ Smallsets
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+*****************************************************************************}
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+
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+ procedure t68kaddnode.second_cmpsmallset;
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+ var
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+ tmpreg : tregister;
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+ begin
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+ location_reset(location,LOC_FLAGS,OS_NO);
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+
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+ case nodetype of
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+ equaln,
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+ unequaln :
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+ begin
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+ {emit_compare(true);}
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+ end;
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+ lten,gten:
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+ begin
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+ If (not(nf_swaped in flags) and
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+ (nodetype = lten)) or
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+ ((nf_swaped in flags) and
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+ (nodetype = gten)) then
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+ swapleftright;
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+ // now we have to check whether left >= right
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+ tmpreg := cg.get_scratch_reg_int(exprasmlist);
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+ if left.location.loc = LOC_CONSTANT then
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+ begin
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+ cg.a_op_const_reg_reg(exprasmlist,OP_AND,OS_INT,
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+ not(left.location.value),right.location.register,tmpreg);
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+ exprasmlist.concat(taicpu.op_reg(A_TST,S_L,tmpreg));
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+ // the two instructions above should be folded together by
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+ // the peepholeoptimizer
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+ end
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+ else
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+ begin
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+ if right.location.loc = LOC_CONSTANT then
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+ begin
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+ cg.a_load_const_reg(exprasmlist,OS_INT,
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+ aword(right.location.value),tmpreg);
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+ exprasmlist.concat(taicpu.op_reg_reg(A_AND,S_L,
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+ tmpreg,left.location.register));
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+ end
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+ else
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+ exprasmlist.concat(taicpu.op_reg_reg(A_AND,S_L,
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+ right.location.register,left.location.register));
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+ end;
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+ cg.free_scratch_reg(exprasmlist,tmpreg);
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+ location.resflags := getresflags(true);
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+ end;
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+ else
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+ internalerror(2002072701);
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+ end;
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+
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+
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+ end;
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+
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+
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+{*****************************************************************************
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+ Ordinals
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+*****************************************************************************}
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+
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+ procedure t68kaddnode.second_cmpordinal;
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+ var
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+ unsigned : boolean;
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+ useconst : boolean;
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+ tmpreg : tregister;
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+ op : tasmop;
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+ begin
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+ { set result location }
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+ location_reset(location,LOC_JUMP,OS_NO);
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+
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+ { load values into registers (except constants) }
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+ load_left_right(true, false);
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+
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+ { determine if the comparison will be unsigned }
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+ unsigned:=not(is_signed(left.resulttype.def)) or
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+ not(is_signed(right.resulttype.def));
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+
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+ // get the constant on the right if there is one
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+ if (left.location.loc = LOC_CONSTANT) then
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+ swapleftright;
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+ // can we use an immediate, or do we have to load the
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+ // constant in a register first?
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+ if (right.location.loc = LOC_CONSTANT) then
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+ begin
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+{$ifdef extdebug}
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+ if (right.location.size in [OS_64,OS_S64]) and (hi(right.location.valueqword)<>0) and ((hi(right.location.valueqword)<>-1) or unsigned) then
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+ internalerror(2002080301);
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+{$endif extdebug}
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+ if (nodetype in [equaln,unequaln]) then
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+ if (unsigned and
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+ (right.location.value > high(word))) or
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+ (not unsigned and
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+ (longint(right.location.value) < low(smallint)) or
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+ (longint(right.location.value) > high(smallint))) then
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+ { we can then maybe use a constant in the 'othersigned' case
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+ (the sign doesn't matter for // equal/unequal)}
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+ unsigned := not unsigned;
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+
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+ if (unsigned and
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+ ((right.location.value) <= high(word))) or
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+ (not(unsigned) and
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+ (longint(right.location.value) >= low(smallint)) and
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+ (longint(right.location.value) <= high(smallint))) then
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+ useconst := true
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+ else
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+ begin
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+ useconst := false;
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+ tmpreg := cg.get_scratch_reg_int(exprasmlist);
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+ cg.a_load_const_reg(exprasmlist,OS_INT,
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+ aword(right.location.value),tmpreg);
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+ end
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+ end
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+ else
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+ useconst := false;
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+ location.loc := LOC_FLAGS;
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+ location.resflags := getresflags(unsigned);
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+ op := A_CMP;
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+ if (right.location.loc = LOC_CONSTANT) then
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+ if useconst then
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+ exprasmlist.concat(taicpu.op_reg_const(op,S_L,
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+ left.location.register,longint(right.location.value)))
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+ else
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+ begin
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+ exprasmlist.concat(taicpu.op_reg_reg(op,S_L,
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+ left.location.register,tmpreg));
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+ cg.free_scratch_reg(exprasmlist,tmpreg);
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+ end
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+ else
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+ exprasmlist.concat(taicpu.op_reg_reg(op,S_L,
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+ left.location.register,right.location.register));
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+ end;
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+
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+{*****************************************************************************
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+ Boolean
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+*****************************************************************************}
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+
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+ procedure t68kaddnode.second_cmpboolean;
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+ var
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+ cgop : TOpCg;
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+ cgsize : TCgSize;
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+ isjump : boolean;
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+ otl,ofl : tasmlabel;
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+ pushedregs : tmaybesave;
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+ begin
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+ if (torddef(left.resulttype.def).typ=bool8bit) or
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+ (torddef(right.resulttype.def).typ=bool8bit) then
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+ cgsize:=OS_8
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+ else
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+ if (torddef(left.resulttype.def).typ=bool16bit) or
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+ (torddef(right.resulttype.def).typ=bool16bit) then
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+ cgsize:=OS_16
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+ else
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+ cgsize:=OS_32;
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+
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+ if (cs_full_boolean_eval in aktlocalswitches) or
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+ (nodetype in [unequaln,ltn,lten,gtn,gten,equaln,xorn]) then
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+ begin
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+ if left.nodetype in [ordconstn,realconstn] then
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+ swapleftright;
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+
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+ isjump:=(left.location.loc=LOC_JUMP);
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+ if isjump then
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+ begin
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+ otl:=truelabel;
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+ objectlibrary.getlabel(truelabel);
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+ ofl:=falselabel;
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+ objectlibrary.getlabel(falselabel);
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+ end;
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+ secondpass(left);
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+ if left.location.loc in [LOC_FLAGS,LOC_JUMP] then
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+ location_force_reg(exprasmlist,left.location,cgsize,false);
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+ if isjump then
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+ begin
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+ truelabel:=otl;
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+ falselabel:=ofl;
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+ end;
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+
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+ maybe_save(exprasmlist,right.registers32,left.location,pushedregs);
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+ isjump:=(right.location.loc=LOC_JUMP);
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+ if isjump then
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+ begin
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+ otl:=truelabel;
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+ objectlibrary.getlabel(truelabel);
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+ ofl:=falselabel;
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+ objectlibrary.getlabel(falselabel);
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+ end;
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+ secondpass(right);
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+ maybe_restore(exprasmlist,left.location,pushedregs);
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+ if right.location.loc in [LOC_FLAGS,LOC_JUMP] then
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+ location_force_reg(exprasmlist,right.location,cgsize,false);
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+ if isjump then
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+ begin
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+ truelabel:=otl;
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+ falselabel:=ofl;
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+ end;
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+
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+ location_reset(location,LOC_FLAGS,OS_NO);
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+
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+ load_left_right(true,false);
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+
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+ if (left.location.loc = LOC_CONSTANT) then
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+ swapleftright;
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+
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+ if (right.location.loc <> LOC_CONSTANT) then
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+ exprasmlist.concat(taicpu.op_reg_reg(A_CMP,S_L,
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+ left.location.register,right.location.register))
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+ else
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+ exprasmlist.concat(taicpu.op_const_reg(A_CMP,S_L,
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+ longint(right.location.value),left.location.register));
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+ location.resflags := getresflags(true);
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+
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+ end;
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+
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+ clear_left_right(true);
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+
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+ end;
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+
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+
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+
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+{*****************************************************************************
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+ 64-bit
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+*****************************************************************************}
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+
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+ procedure t68kaddnode.second_cmp64bit;
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+ begin
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+(* load_left_right(true,false);
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+
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+ case nodetype of
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+ ltn,lten,
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+ gtn,gten:
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+ begin
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+ emit_cmp64_hi;
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+ firstjmp64bitcmp;
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+ emit_cmp64_lo;
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+ secondjmp64bitcmp;
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+ end;
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+ equaln,unequaln:
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+ begin
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+ // instead of doing a complicated compare, do
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+ // (left.hi xor right.hi) or (left.lo xor right.lo)
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+ // (somewhate optimized so that no superfluous 'mr's are
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+ // generated)
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+ if (left.location.loc = LOC_CONSTANT) then
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+ swapleftright;
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+ if (right.location.loc = LOC_CONSTANT) then
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+ begin
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+ if left.location.loc = LOC_REGISTER then
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+ begin
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+ tempreg64.reglo := left.location.registerlow;
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+ tempreg64.reghi := left.location.registerhigh;
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+ end
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+ else
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+ begin
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+ if (aword(right.location.valueqword) <> 0) then
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+ tempreg64.reglo := cg.get_scratch_reg_int(exprasmlist)
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+ else
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+ tempreg64.reglo := left.location.registerlow;
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+ if ((right.location.valueqword shr 32) <> 0) then
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+ tempreg64.reghi := cg.get_scratch_reg_int(exprasmlist)
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+ else
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+ tempreg64.reghi := left.location.registerhigh;
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+ end;
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+
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+ if (aword(right.location.valueqword) <> 0) then
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+ { negative values can be handled using SUB, }
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+ { positive values < 65535 using XOR. }
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+ if (longint(right.location.valueqword) >= -32767) and
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+ (longint(right.location.valueqword) < 0) then
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+ cg.a_op_const_reg_reg(exprasmlist,OP_SUB,OS_INT,
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+ aword(right.location.valueqword),
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+ left.location.registerlow,tempreg64.reglo)
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+ else
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+ cg.a_op_const_reg_reg(exprasmlist,OP_XOR,OS_INT,
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+ aword(right.location.valueqword),
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+ left.location.registerlow,tempreg64.reglo);
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+
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+ if ((right.location.valueqword shr 32) <> 0) then
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+ if (longint(right.location.valueqword shr 32) >= -32767) and
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+ (longint(right.location.valueqword shr 32) < 0) then
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+ cg.a_op_const_reg_reg(exprasmlist,OP_SUB,OS_INT,
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+ aword(right.location.valueqword shr 32),
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+ left.location.registerhigh,tempreg64.reghi)
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+ else
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+ cg.a_op_const_reg_reg(exprasmlist,OP_XOR,OS_INT,
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+ aword(right.location.valueqword shr 32),
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+ left.location.registerhigh,tempreg64.reghi);
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+ end
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+ else
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+ begin
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+ tempreg64.reglo := cg.get_scratch_reg_int(exprasmlist);
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+ tempreg64.reghi := cg.get_scratch_reg_int(exprasmlist);
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+ cg64.a_op64_reg_reg_reg(exprasmlist,OP_XOR,
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+ left.location.register64,right.location.register64,
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+ tempreg64);
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+ end;
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+
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+ cg.a_reg_alloc(exprasmlist,R_0);
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+ exprasmlist.concat(taicpu.op_reg_reg_reg(A_OR_,R_0,
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+ tempreg64.reglo,tempreg64.reghi));
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+ cg.a_reg_dealloc(exprasmlist,R_0);
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+ if (tempreg64.reglo <> left.location.registerlow) then
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+ cg.free_scratch_reg(exprasmlist,tempreg64.reglo);
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+ if (tempreg64.reghi <> left.location.registerhigh) then
|
|
|
+ cg.free_scratch_reg(exprasmlist,tempreg64.reghi);
|
|
|
+
|
|
|
+ location_reset(location,LOC_FLAGS,OS_NO);
|
|
|
+ location.resflags := getresflags;
|
|
|
+ end;
|
|
|
+ else
|
|
|
+ internalerror(2002072803);
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ { set result location }
|
|
|
+ { (emit_compare sets it to LOC_FLAGS for compares, so set the }
|
|
|
+ { real location only now) (JM) }
|
|
|
+ if cmpop and
|
|
|
+ not(nodetype in [equaln,unequaln]) then
|
|
|
+ location_reset(location,LOC_JUMP,OS_NO);
|
|
|
+*)
|
|
|
+ location_reset(location,LOC_JUMP,OS_NO);
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+begin
|
|
|
+ caddnode:=t68kaddnode;
|
|
|
+end.
|
|
|
+
|
|
|
+{
|
|
|
+ $Log$
|
|
|
+ Revision 1.1 2003-02-02 19:25:54 carl
|
|
|
+ * Several bugfixes for m68k target (register alloc., opcode emission)
|
|
|
+ + VIS target
|
|
|
+ + Generic add more complete (still not verified)
|
|
|
+
|
|
|
+}
|