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99 lines
3.1 KiB
ObjectPascal
99 lines
3.1 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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Generate code for i8086 assembler for type converting nodes
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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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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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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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unit n8086cnv;
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{$i fpcdefs.inc}
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interface
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uses
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node,ncgcnv,nx86cnv,defutil,defcmp;
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type
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{ t8086typeconvnode }
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t8086typeconvnode = class(tx86typeconvnode)
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protected
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function typecheck_int_to_int: tnode;override;
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function typecheck_proc_to_procvar: tnode;override;
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procedure second_proc_to_procvar;override;
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end;
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implementation
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uses
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verbose,systems,globals,globtype,
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aasmbase,aasmtai,aasmdata,aasmcpu,
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symconst,symdef,symcpu,
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cgbase,cga,procinfo,pass_1,pass_2,
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ncon,ncal,ncnv,nmem,n8086mem,
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cpubase,cpuinfo,
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cgutils,cgobj,hlcgobj,cgx86,ncgutil,
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tgobj;
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function t8086typeconvnode.typecheck_int_to_int: tnode;
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begin
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Result:=inherited typecheck_int_to_int;
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if (is_16bitint(totypedef) or is_8bitint(totypedef)) and (left.nodetype=addrn) then
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begin
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if left.nodetype=addrn then
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ti8086addrnode(left).get_offset_only:=true;
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end;
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end;
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function t8086typeconvnode.typecheck_proc_to_procvar: tnode;
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begin
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Result:=inherited typecheck_proc_to_procvar;
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if tcnf_proc_2_procvar_get_offset_only in convnodeflags then
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begin
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if resultdef.typ<>procvardef then
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internalerror(2018040401);
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if po_far in tprocvardef(resultdef).procoptions then
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resultdef:=cprocvardef.getreusableprocaddr(tabstractprocdef(left.resultdef),pc_offset);
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end
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else if (tcnf_proc_2_procvar_2_voidpointer in convnodeflags) and
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(current_settings.x86memorymodel in x86_far_code_models) then
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begin
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if resultdef.typ<>procvardef then
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internalerror(2018040402);
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if not (po_far in tprocvardef(resultdef).procoptions) then
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resultdef:=cprocvardef.getreusableprocaddr(tabstractprocdef(left.resultdef),pc_far_address);
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end;
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end;
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procedure t8086typeconvnode.second_proc_to_procvar;
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begin
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if (tcnf_proc_2_procvar_get_offset_only in convnodeflags) and
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is_proc_far(tabstractprocdef(resultdef)) then
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internalerror(2018040403);
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inherited;
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end;
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begin
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ctypeconvnode:=t8086typeconvnode
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end.
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