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{
Copyright (c) 1998-2010 by Florian Klaempfl and Jonas Maebe
Member of the Free Pascal development team
This unit contains routines to create a pass-through high-level code
generator. This is used by most regular code generators.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit hlcgcpu;
{$i fpcdefs.inc}
interface
uses
globtype,
aasmdata,
symdef,
hlcg2ll;
type
tbasehlcgarm = class(thlcg2ll)
procedure g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);override;
end;
tarmhlcgcpu = class(tbasehlcgarm)
end;
tthumbhlcgcpu = class(tbasehlcgarm)
procedure a_jmp_external_name(list: TAsmList; const externalname: TSymStr); override;
end;
implementation
uses
globals,verbose,
procinfo,fmodule,
symconst,
aasmbase,aasmtai,aasmcpu, cpuinfo,
hlcgobj,
cgbase, cgutils, cpubase, cgobj, cgcpu;
procedure tbasehlcgarm.g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);
procedure loadvmttor12;
var
tmpref,
href : treference;
l : TAsmLabel;
begin
reference_reset_base(href,voidpointertype,NR_R0,0,ctempposinvalid,sizeof(pint),[]);
if GenerateThumbCode then
begin
if (href.offset in [0..124]) and ((href.offset mod 4)=0) then
begin
list.concat(taicpu.op_regset(A_PUSH,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_R0);
list.concat(taicpu.op_reg_reg(A_MOV,NR_R12,NR_R0));
list.concat(taicpu.op_regset(A_POP,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
end
else
begin
list.concat(taicpu.op_regset(A_PUSH,R_INTREGISTER,R_SUBWHOLE,[RS_R0,RS_R1]));
{ create consts entry }
reference_reset(tmpref,4,[]);
current_asmdata.getjumplabel(l);
current_procinfo.aktlocaldata.Concat(tai_align.Create(4));
cg.a_label(current_procinfo.aktlocaldata,l);
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(href.offset));
tmpref.symbol:=l;
tmpref.base:=NR_PC;
list.concat(taicpu.op_reg_ref(A_LDR,NR_R1,tmpref));
href.offset:=0;
href.index:=NR_R1;
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_R0);
list.concat(taicpu.op_reg_reg(A_MOV,NR_R12,NR_R0));
list.concat(taicpu.op_regset(A_POP,R_INTREGISTER,R_SUBWHOLE,[RS_R0,RS_R1]));
end;
end
else
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_R12);
end;
procedure op_onr12methodaddr;
var
tmpref,
href : treference;
l : TAsmLabel;
begin
if (procdef.extnumber=$ffff) then
Internalerror(2000061311);
if GenerateThumbCode then
begin
reference_reset_base(href,voidpointertype,NR_R0,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),ctempposinvalid,sizeof(pint),[]);
if (href.offset in [0..124]) and ((href.offset mod 4)=0) then
begin
list.concat(taicpu.op_regset(A_PUSH,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
list.concat(taicpu.op_reg_reg(A_MOV,NR_R0,NR_R12));
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_R0);
list.concat(taicpu.op_reg_reg(A_MOV,NR_R12,NR_R0));
list.concat(taicpu.op_regset(A_POP,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
end
else
begin
list.concat(taicpu.op_regset(A_PUSH,R_INTREGISTER,R_SUBWHOLE,[RS_R0,RS_R1]));
{ create consts entry }
reference_reset(tmpref,4,[]);
current_asmdata.getjumplabel(l);
current_procinfo.aktlocaldata.Concat(tai_align.Create(4));
cg.a_label(current_procinfo.aktlocaldata,l);
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
current_procinfo.aktlocaldata.concat(tai_const.Create_32bit(href.offset));
tmpref.symbol:=l;
tmpref.base:=NR_PC;
list.concat(taicpu.op_reg_ref(A_LDR,NR_R1,tmpref));
list.concat(taicpu.op_reg_reg(A_MOV,NR_R0,NR_R12));
href.offset:=0;
href.base:=NR_R0;
href.index:=NR_R1;
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_R0);
list.concat(taicpu.op_reg_reg(A_MOV,NR_R12,NR_R0));
list.concat(taicpu.op_regset(A_POP,R_INTREGISTER,R_SUBWHOLE,[RS_R0,RS_R1]));
end;
end
else
begin
reference_reset_base(href,voidpointertype,NR_R12,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),ctempposinvalid,sizeof(pint),[]);
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_R12);
end;
if not(CPUARM_HAS_BX in cpu_capabilities[current_settings.cputype]) then
list.concat(taicpu.op_reg_reg(A_MOV,NR_PC,NR_R12))
else
list.concat(taicpu.op_reg(A_BX,NR_R12));
end;
var
make_global : boolean;
tmpref : treference;
l : TAsmLabel;
begin
if not(procdef.proctypeoption in [potype_function,potype_procedure]) then
Internalerror(200006137);
if not assigned(procdef.struct) or
(procdef.procoptions*[po_classmethod, po_staticmethod,
po_methodpointer, po_interrupt, po_iocheck]<>[]) then
Internalerror(200006138);
if procdef.owner.symtabletype<>ObjectSymtable then
Internalerror(200109191);
if GenerateThumbCode or GenerateThumb2Code then
list.concat(tai_directive.Create(asd_thumb_func,''));
make_global:=false;
if (not current_module.is_unit) or
create_smartlink or
(procdef.owner.defowner.owner.symtabletype=globalsymtable) then
make_global:=true;
if make_global then
list.concat(Tai_symbol.Createname_global(labelname,AT_FUNCTION,0,procdef))
else
list.concat(Tai_symbol.Createname_hidden(labelname,AT_FUNCTION,0,procdef));
{ the wrapper might need aktlocaldata for the additional data to
load the constant }
current_procinfo:=cprocinfo.create(nil);
{ set param1 interface to self }
g_adjust_self_value(list,procdef,ioffset);
{ case 4 }
if (po_virtualmethod in procdef.procoptions) and
not is_objectpascal_helper(procdef.struct) then
begin
loadvmttor12;
op_onr12methodaddr;
end
{ case 0 }
else if GenerateThumbCode then
begin
{ bl cannot be used here because it destroys lr }
list.concat(taicpu.op_regset(A_PUSH,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
{ create consts entry }
reference_reset(tmpref,4,[]);
current_asmdata.getjumplabel(l);
current_procinfo.aktlocaldata.Concat(tai_align.Create(4));
cg.a_label(current_procinfo.aktlocaldata,l);
tmpref.symboldata:=current_procinfo.aktlocaldata.last;
current_procinfo.aktlocaldata.concat(tai_const.Create_sym(current_asmdata.RefAsmSymbol(procdef.mangledname,AT_FUNCTION)));
tmpref.symbol:=l;
tmpref.base:=NR_PC;
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,tmpref,NR_R0);
list.concat(taicpu.op_reg_reg(A_MOV,NR_R12,NR_R0));
list.concat(taicpu.op_regset(A_POP,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
list.concat(taicpu.op_reg(A_BX,NR_R12));
end
else
list.concat(taicpu.op_sym(A_B,current_asmdata.RefAsmSymbol(procdef.mangledname,AT_FUNCTION)));
list.concatlist(current_procinfo.aktlocaldata);
current_procinfo.Free;
current_procinfo:=nil;
list.concat(Tai_symbol_end.Createname(labelname));
end;
{ tthumbhlcgcpu }
procedure tthumbhlcgcpu.a_jmp_external_name(list: TAsmList; const externalname: TSymStr);
var
tmpref : treference;
l : tasmlabel;
begin
{ there is no branch instruction on thumb which allows big distances and which leaves LR as it is
and which allows to switch the instruction set }
{ create const entry }
reference_reset(tmpref,4,[]);
current_asmdata.getjumplabel(l);
tmpref.symbol:=l;
tmpref.base:=NR_PC;
list.concat(taicpu.op_regset(A_PUSH,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
list.concat(taicpu.op_reg_ref(A_LDR,NR_R0,tmpref));
list.concat(taicpu.op_reg_reg(A_MOV,NR_R12,NR_R0));
list.concat(taicpu.op_regset(A_POP,R_INTREGISTER,R_SUBWHOLE,[RS_R0]));
list.concat(taicpu.op_reg(A_BX,NR_R12));
{ append const entry }
list.Concat(tai_align.Create(4));
list.Concat(tai_label.create(l));
list.concat(tai_const.Create_sym(current_asmdata.RefAsmSymbol(externalname,AT_FUNCTION)));
end;
procedure create_hlcodegen_cpu;
begin
if GenerateThumbCode then
hlcg:=tthumbhlcgcpu.create
else
hlcg:=tarmhlcgcpu.create;
create_codegen;
end;
begin
chlcgobj:=tbasehlcgarm;
create_hlcodegen:=@create_hlcodegen_cpu;
end.
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