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https://gitlab.com/freepascal.org/fpc/source.git
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187c2af20e
generator, so it can now handle i8086 near and far pointers generically - removed almost all of t8086typeconvnode.second_proc_procvar, since it's no longer needed. Only a few assertions are left there to ensure that we don't accidentally attempt to take the address of a near procedure in a far code memory model, because the calling conventions are incompatible. git-svn-id: trunk@27677 -
105 lines
3.5 KiB
ObjectPascal
105 lines
3.5 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_proc_to_procvar: tnode;override;
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procedure second_proc_to_procvar;override;
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procedure second_nil_to_methodprocvar;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,
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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_proc_to_procvar: tnode;
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begin
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if (current_settings.x86memorymodel in x86_far_code_models) and
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not is_proc_far(tabstractprocdef(left.resultdef)) then
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CGMessage1(type_e_procedure_must_be_far,left.resultdef.GetTypeName);
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Result:=inherited typecheck_proc_to_procvar;
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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 is_proc_far(tabstractprocdef(resultdef))<>
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(current_settings.x86memorymodel in x86_far_code_models) then
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internalerror(2014041302);
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if is_proc_far(tabstractprocdef(left.resultdef))<>
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(current_settings.x86memorymodel in x86_far_code_models) then
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internalerror(2014041303);
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inherited;
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end;
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procedure t8086typeconvnode.second_nil_to_methodprocvar;
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begin
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location_reset(location,LOC_REGISTER,def_cgsize(resultdef));
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if current_settings.x86memorymodel in x86_far_data_models then
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begin
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location.registerhi:=cg.getintregister(current_asmdata.currasmlist,OS_32);
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cg.a_load_const_reg(current_asmdata.currasmlist,OS_32,0,location.registerhi);
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end
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else
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begin
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location.registerhi:=cg.getaddressregister(current_asmdata.currasmlist);
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cg.a_load_const_reg(current_asmdata.currasmlist,OS_ADDR,0,location.registerhi);
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end;
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if (resultdef.typ=procvardef) and is_proc_far(tprocvardef(resultdef)) then
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begin
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location.register:=cg.getintregister(current_asmdata.currasmlist,OS_32);
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cg.a_load_const_reg(current_asmdata.currasmlist,OS_32,0,location.register);
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end
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else
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begin
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location.register:=cg.getaddressregister(current_asmdata.currasmlist);
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cg.a_load_const_reg(current_asmdata.currasmlist,OS_ADDR,0,location.register);
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end;
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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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