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144 lines
4.3 KiB
ObjectPascal
144 lines
4.3 KiB
ObjectPascal
{
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Copyright (c) 1998-2010 by Florian Klaempfl and Jonas Maebe
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Member of the Free Pascal development team
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This unit contains routines to create a pass-through high-level code
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generator. This is used by most regular code generators.
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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 hlcgcpu;
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{$i fpcdefs.inc}
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interface
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uses
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aasmdata,
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symdef,
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hlcg2ll;
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type
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thlcgcpu = class(thlcg2ll)
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procedure g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);override;
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end;
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procedure create_hlcodegen;
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implementation
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uses
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globtype,verbose,
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fmodule,
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aasmbase,aasmtai,aasmcpu,
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symconst,
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hlcgobj,
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cgbase, cgutils, cgobj, cpubase, cgcpu;
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procedure thlcgcpu.g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);
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procedure getselftoa0(offs:longint);
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var
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href : treference;
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selfoffsetfromsp : longint;
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begin
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{ move.l offset(%sp),%a0 }
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{ framepointer is pushed for nested procs }
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if procdef.parast.symtablelevel>normal_function_level then
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selfoffsetfromsp:=sizeof(aint)
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else
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selfoffsetfromsp:=0;
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reference_reset_base(href, voidstackpointertype, NR_SP,selfoffsetfromsp+offs,4);
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cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_A0);
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end;
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procedure loadvmttoa0;
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var
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href : treference;
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begin
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{ move.l (%a0),%a0 ; load vmt}
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reference_reset_base(href, voidpointertype, NR_A0,0,4);
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cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_A0);
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end;
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procedure op_ona0methodaddr;
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var
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href : treference;
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begin
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if (procdef.extnumber=$ffff) then
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Internalerror(2013100701);
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reference_reset_base(href,voidpointertype,NR_A0,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),4);
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list.concat(taicpu.op_ref_reg(A_MOVE,S_L,href,NR_A0));
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reference_reset_base(href,voidpointertype,NR_A0,0,4);
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list.concat(taicpu.op_ref(A_JMP,S_NO,href));
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end;
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var
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make_global : boolean;
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begin
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if not(procdef.proctypeoption in [potype_function,potype_procedure]) then
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Internalerror(200006137);
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if not assigned(procdef.struct) or
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(procdef.procoptions*[po_classmethod, po_staticmethod,
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po_methodpointer, po_interrupt, po_iocheck]<>[]) then
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Internalerror(200006138);
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if procdef.owner.symtabletype<>ObjectSymtable then
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Internalerror(200109191);
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make_global:=false;
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if (not current_module.is_unit) or
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create_smartlink or
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(procdef.owner.defowner.owner.symtabletype=globalsymtable) then
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make_global:=true;
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if make_global then
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List.concat(Tai_symbol.Createname_global(labelname,AT_FUNCTION,0))
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else
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List.concat(Tai_symbol.Createname(labelname,AT_FUNCTION,0));
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{ set param1 interface to self }
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g_adjust_self_value(list,procdef,ioffset);
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{ case 4 }
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if (po_virtualmethod in procdef.procoptions) and
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not is_objectpascal_helper(procdef.struct) then
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begin
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getselftoa0(4);
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loadvmttoa0;
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op_ona0methodaddr;
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end
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{ case 0 }
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else
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list.concat(taicpu.op_sym(A_JMP,S_NO,current_asmdata.RefAsmSymbol(procdef.mangledname)));
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List.concat(Tai_symbol_end.Createname(labelname));
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end;
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procedure create_hlcodegen;
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begin
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hlcg:=thlcgcpu.create;
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create_codegen;
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end;
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begin
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chlcgobj:=thlcgcpu;
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end.
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