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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,
aasmbase, aasmdata,
cgbase, cgutils,
symtype,symdef,
parabase, hlcgobj, hlcg2ll;
type
thlcgmips = class(thlcg2ll)
function a_call_name(list: TAsmList; pd: tprocdef; const s: TSymStr; const paras: array of pcgpara; forceresdef: tdef; weak: boolean): tcgpara; override;
procedure a_load_subsetreg_reg(list: TAsmList; subsetsize, tosize: tdef; const sreg: tsubsetregister; destreg: tregister);override;
protected
procedure a_load_regconst_subsetreg_intern(list: TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt); override;
public
procedure g_intf_wrapper(list: tasmlist; procdef: tprocdef; const labelname: string; ioffset: longint); override;
procedure a_jmp_external_name(list: TAsmList; const externalname: TSymStr);override;
end;
implementation
uses
verbose,globals,
fmodule,
aasmtai,aasmcpu,
cutils,
symconst,symsym,defutil,
cgobj,
cpubase,
cpuinfo,
cgcpu;
function thlcgmips.a_call_name(list: TAsmList; pd: tprocdef; const s: TSymStr; const paras: array of pcgpara; forceresdef: tdef; weak: boolean): tcgpara;
var
ref: treference;
sym: tasmsymbol;
begin
if weak then
sym:=current_asmdata.WeakRefAsmSymbol(s,AT_FUNCTION)
else
sym:=current_asmdata.RefAsmSymbol(s,AT_FUNCTION);
if (po_external in pd.procoptions) then
begin
if not (cs_create_pic in current_settings.moduleswitches) then
begin
reference_reset_symbol(ref,current_asmdata.RefAsmSymbol('_gp',AT_DATA),0,sizeof(aint),[]);
list.concat(tai_comment.create(strpnew('Using PIC code for a_call_name')));
cg.a_loadaddr_ref_reg(list,ref,NR_GP);
end;
TCGMIPS(cg).a_call_sym_pic(list,sym);
end
else
cg.a_call_name(list,s,weak);
{ set the result location }
result:=get_call_result_cgpara(pd,forceresdef);
end;
procedure thlcgmips.a_load_subsetreg_reg(list: TAsmList; subsetsize, tosize: tdef; const sreg: tsubsetregister; destreg: tregister);
var
cgsubsetsize,
cgtosize: tcgsize;
begin
cgsubsetsize:=def_cgsize(subsetsize);
cgtosize:=def_cgsize(tosize);
if (current_settings.cputype<>cpu_mips32r2) and (current_settings.cputype<>cpu_pic32mx) then
inherited a_load_subsetreg_reg(list,subsetsize,tosize,sreg,destreg)
else if (sreg.bitlen>32) then
InternalError(2013070201)
else if (sreg.bitlen<>32) then
begin
list.concat(taicpu.op_reg_reg_const_const(A_EXT,destreg,sreg.subsetreg,
sreg.startbit,sreg.bitlen));
{ types with a negative lower bound are always a base type (8, 16, 32 bits) }
if (cgsubsetsize in [OS_S8..OS_S128]) then
if ((sreg.bitlen mod 8) = 0) then
begin
cg.a_load_reg_reg(list,tcgsize2unsigned[cgsubsetsize],cgsubsetsize,destreg,destreg);
cg.a_load_reg_reg(list,cgsubsetsize,cgtosize,destreg,destreg);
end
else
begin
cg.a_op_const_reg(list,OP_SHL,OS_INT,32-sreg.bitlen,destreg);
cg.a_op_const_reg(list,OP_SAR,OS_INT,32-sreg.bitlen,destreg);
end;
end
else
cg.a_load_reg_reg(list,cgsubsetsize,cgtosize,sreg.subsetreg,destreg);
end;
procedure thlcgmips.a_load_regconst_subsetreg_intern(list: TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt);
begin
if (current_settings.cputype<>cpu_mips32r2) and (current_settings.cputype<>cpu_pic32mx) then
inherited a_load_regconst_subsetreg_intern(list,fromsize,subsetsize,fromreg,sreg,slopt)
else if (sreg.bitlen>32) then
InternalError(2013070202)
else if (sreg.bitlen<>32) then
begin
case slopt of
SL_SETZERO:
fromreg:=NR_R0;
SL_SETMAX:
begin
fromreg:=cg.getintregister(list,OS_INT);
cg.a_load_const_reg(list,OS_INT,-1,fromreg);
end;
else
;
end;
list.concat(taicpu.op_reg_reg_const_const(A_INS,sreg.subsetreg,fromreg,
sreg.startbit,sreg.bitlen));
end
else if not (slopt in [SL_SETZERO,SL_SETMAX]) then
cg.a_load_reg_reg(list,def_cgsize(fromsize),def_cgsize(subsetsize),fromreg,sreg.subsetreg)
else
inherited a_load_regconst_subsetreg_intern(list,fromsize,subsetsize,fromreg,sreg,slopt);
end;
procedure thlcgmips.a_jmp_external_name(list: TAsmList; const externalname: TSymStr);
var
href: treference;
begin
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(externalname,AT_DATA),0,sizeof(aint),[]);
{ Always do indirect jump using $t9, it won't harm in non-PIC mode }
if (cs_create_pic in current_settings.moduleswitches) then
begin
list.concat(taicpu.op_none(A_P_SET_NOREORDER));
list.concat(taicpu.op_reg(A_P_CPLOAD,NR_PIC_FUNC));
href.base:=NR_GP;
href.refaddr:=addr_pic_call16;
list.concat(taicpu.op_reg_ref(A_LW,NR_PIC_FUNC,href));
list.concat(taicpu.op_reg(A_JR,NR_PIC_FUNC));
{ Delay slot }
list.Concat(taicpu.op_none(A_NOP));
list.Concat(taicpu.op_none(A_P_SET_REORDER));
end
else
begin
href.refaddr:=addr_high;
list.concat(taicpu.op_reg_ref(A_LUI,NR_PIC_FUNC,href));
href.refaddr:=addr_low;
list.concat(taicpu.op_reg_ref(A_ADDIU,NR_PIC_FUNC,href));
list.concat(taicpu.op_reg(A_JR,NR_PIC_FUNC));
{ Delay slot }
list.Concat(taicpu.op_none(A_NOP));
end;
end;
procedure thlcgmips.g_intf_wrapper(list: tasmlist; procdef: tprocdef; const labelname: string; ioffset: longint);
var
make_global: boolean;
hsym: tsym;
href: treference;
paraloc: Pcgparalocation;
IsVirtual: boolean;
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);
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(labelname, AT_FUNCTION, 0, procdef));
IsVirtual:=(po_virtualmethod in procdef.procoptions) and
not is_objectpascal_helper(procdef.struct);
if (cs_create_pic in current_settings.moduleswitches) and
(not IsVirtual) then
begin
list.concat(Taicpu.op_none(A_P_SET_NOREORDER));
list.concat(Taicpu.op_reg(A_P_CPLOAD,NR_PIC_FUNC));
list.concat(Taicpu.op_none(A_P_SET_REORDER));
end;
{ set param1 interface to self }
procdef.init_paraloc_info(callerside);
hsym:=tsym(procdef.parast.Find('self'));
if not(assigned(hsym) and
(hsym.typ=paravarsym)) then
internalerror(2010103101);
paraloc:=tparavarsym(hsym).paraloc[callerside].location;
if assigned(paraloc^.next) then
InternalError(2013020101);
case paraloc^.loc of
LOC_REGISTER:
begin
if ((ioffset>=simm16lo) and (ioffset<=simm16hi)) then
cg.a_op_const_reg(list,OP_SUB, paraloc^.size,ioffset,paraloc^.register)
else
begin
cg.a_load_const_reg(list, paraloc^.size, ioffset, NR_R1);
cg.a_op_reg_reg(list, OP_SUB, paraloc^.size, NR_R1, paraloc^.register);
end;
end;
else
internalerror(2010103102);
end;
if IsVirtual then
begin
{ load VMT pointer }
reference_reset_base(href,voidpointertype,paraloc^.register,0,ctempposinvalid,sizeof(aint),[]);
list.concat(taicpu.op_reg_ref(A_LW,NR_VMT,href));
if (procdef.extnumber=$ffff) then
Internalerror(200006139);
{ TODO: case of large VMT is not handled }
{ We have no reason not to use $t9 even in non-PIC mode. }
reference_reset_base(href, voidpointertype, NR_VMT, tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber), ctempposinvalid, sizeof(aint), []);
list.concat(taicpu.op_reg_ref(A_LW,NR_PIC_FUNC,href));
list.concat(taicpu.op_reg(A_JR, NR_PIC_FUNC));
end
else if not (cs_create_pic in current_settings.moduleswitches) then
list.concat(taicpu.op_sym(A_J,current_asmdata.RefAsmSymbol(procdef.mangledname,AT_FUNCTION)))
else
begin
{ GAS does not expand "J symbol" into PIC sequence }
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(procdef.mangledname,AT_FUNCTION),0,sizeof(pint),[]);
href.base:=NR_GP;
href.refaddr:=addr_pic_call16;
list.concat(taicpu.op_reg_ref(A_LW,NR_PIC_FUNC,href));
list.concat(taicpu.op_reg(A_JR,NR_PIC_FUNC));
end;
{ Delay slot }
list.Concat(TAiCpu.Op_none(A_NOP));
List.concat(Tai_symbol_end.Createname(labelname));
end;
procedure create_hlcodegen_cpu;
begin
hlcg:=thlcgmips.create;
create_codegen;
end;
begin
chlcgobj:=thlcgmips;
create_hlcodegen:=@create_hlcodegen_cpu;
end.
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