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fpc/compiler/aarch64/hlcgcpu.pas
Jonas Maebe 4686f61002 * keep track of the temp position separately from the offset in references, 
so that they can still be freed after the reference has been changed
    (e.g. in case of array indexing or record field accesses) (mantis #33628)

git-svn-id: trunk@38814 -
2018-04-22 17:03:16 +00:00

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ObjectPascal
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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
symtype,
aasmdata,
symdef,
cgbase,cgutils,
hlcgobj, hlcg2ll;
type
thlcgaarch64 = class(thlcg2ll)
procedure a_load_subsetreg_reg(list: TAsmList; subsetsize, tosize: tdef; const sreg: tsubsetregister; destreg: tregister); override;
procedure a_load_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize: tdef; const fromsreg, tosreg: tsubsetregister); override;
procedure g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);override;
protected
procedure a_load_regconst_subsetreg_intern(list: TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt); override;
end;
procedure create_hlcodegen;
implementation
uses
verbose,globtype,fmodule,
aasmbase,aasmtai,
symconst,symsym,defutil,
cpubase,aasmcpu,parabase,
cgobj,cgcpu;
procedure thlcgaarch64.a_load_subsetreg_reg(list: TAsmList; subsetsize, tosize: tdef; const sreg: tsubsetregister; destreg: tregister);
var
op: tasmop;
tocgsize: tcgsize;
tmpdestreg: tregister;
begin
tocgsize:=def_cgsize(tosize);
if (sreg.startbit<>0) or
not(sreg.bitlen in [32,64]) then
begin
if is_signed(subsetsize) then
op:=A_SBFX
else
op:=A_UBFX;
{ source and destination register of SBFX/UBFX have to be the same size }
if (sreg.subsetregsize in [OS_64,OS_S64]) and
not(tocgsize in [OS_64,OS_S64]) then
tmpdestreg:=cg.getintregister(list,OS_64)
else if not(sreg.subsetregsize in [OS_64,OS_S64]) and
(tocgsize in [OS_64,OS_S64]) then
tmpdestreg:=cg.getintregister(list,OS_32)
else
tmpdestreg:=destreg;
list.concat(taicpu.op_reg_reg_const_const(op,tmpdestreg,sreg.subsetreg,sreg.startbit,sreg.bitlen));
{ need to sign extend further or truncate? }
if (sreg.subsetregsize=OS_S64) and
not(tocgsize in [OS_64,OS_S64]) then
cg.a_load_reg_reg(list,OS_S64,tocgsize,tmpdestreg,destreg)
else if is_signed(subsetsize) and
(tocgsize in [OS_8,OS_16]) then
cg.a_load_reg_reg(list,OS_32,tocgsize,tmpdestreg,destreg)
else if tmpdestreg<>destreg then
cg.a_load_reg_reg(list,def_cgsize(subsetsize),tocgsize,tmpdestreg,destreg)
end
else
cg.a_load_reg_reg(list,def_cgsize(subsetsize),tocgsize,sreg.subsetreg,destreg);
end;
procedure makeregssamesize(list: tasmlist; fromsize, tosize: tcgsize; orgfromreg, orgtoreg: tregister; out newfromreg, newtoreg: tregister);
begin
if (fromsize in [OS_S64,OS_64])<>
(tosize in [OS_S64,OS_64]) then
begin
newfromreg:=cg.makeregsize(list,orgfromreg,OS_64);
newtoreg:=cg.makeregsize(list,orgtoreg,OS_64);
end
else
begin
newfromreg:=orgfromreg;
newtoreg:=orgtoreg;
end;
end;
procedure thlcgaarch64.a_load_subsetreg_subsetreg(list: TAsmlist; fromsubsetsize, tosubsetsize: tdef; const fromsreg, tosreg: tsubsetregister);
var
fromreg, toreg: tregister;
begin
{ BFM can only insert a bitfield that starts at position 0 in the source
source or destination register }
if (tosreg.startbit=0) and
(fromsreg.bitlen>=tosreg.bitlen) then
begin
makeregssamesize(list,fromsreg.subsetregsize,tosreg.subsetregsize,fromsreg.subsetreg,tosreg.subsetreg,fromreg,toreg);
list.concat(taicpu.op_reg_reg_const_const(A_BFXIL,toreg,fromreg,fromsreg.startbit,tosreg.bitlen))
end
else if (fromsreg.startbit=0) and
(fromsreg.bitlen>=tosreg.bitlen) then
begin
makeregssamesize(list,fromsreg.subsetregsize,tosreg.subsetregsize,fromsreg.subsetreg,tosreg.subsetreg,fromreg,toreg);
list.concat(taicpu.op_reg_reg_const_const(A_BFI,toreg,fromreg,tosreg.startbit,tosreg.bitlen))
end
else
inherited;
end;
procedure thlcgaarch64.g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);
var
make_global: boolean;
href: treference;
hsym: tsym;
paraloc: pcgparalocation;
op: tasmop;
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_library 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));
{ 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:
tcgaarch64(cg).handle_reg_imm12_reg(list,A_SUB,paraloc^.size,paraloc^.register,ioffset,paraloc^.register,NR_IP0,false,true);
else
internalerror(2010103102);
end;
if (po_virtualmethod in procdef.procoptions) and
not is_objectpascal_helper(procdef.struct) then
begin
if (procdef.extnumber=$ffff) then
Internalerror(200006139);
{ mov 0(%rdi),%rax ; load vmt}
reference_reset_base(href,voidpointertype,paraloc^.register,0,ctempposinvalid,sizeof(pint),[]);
getcpuregister(list,NR_IP0);
a_load_ref_reg(list,voidpointertype,voidpointertype,href,NR_IP0);
{ jmp *vmtoffs(%eax) ; method offs }
reference_reset_base(href,voidpointertype,NR_IP0,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),ctempposinvalid,sizeof(pint),[]);
op:=A_LDR;
tcgaarch64(cg).make_simple_ref(list,op,OS_ADDR,PF_None,href,NR_IP0);
list.concat(taicpu.op_reg_ref(op,NR_IP0,href));
ungetcpuregister(list,NR_IP0);
list.concat(taicpu.op_reg(A_BR,NR_IP0));
end
else
cg.a_jmp_name(list,procdef.mangledname);
list.concat(Tai_symbol_end.Createname(labelname));
end;
procedure thlcgaarch64.a_load_regconst_subsetreg_intern(list: TAsmList; fromsize, subsetsize: tdef; fromreg: tregister; const sreg: tsubsetregister; slopt: tsubsetloadopt);
var
toreg: tregister;
begin
if slopt in [SL_SETZERO,SL_SETMAX] then
inherited
else if not(sreg.bitlen in [32,64]) or
(sreg.startbit<>0) then
begin
makeregssamesize(list,def_cgsize(fromsize),sreg.subsetregsize,fromreg,sreg.subsetreg,fromreg,toreg);
list.concat(taicpu.op_reg_reg_const_const(A_BFI,toreg,fromreg,sreg.startbit,sreg.bitlen))
end
else
a_load_reg_reg(list,fromsize,subsetsize,fromreg,sreg.subsetreg);
end;
procedure create_hlcodegen;
begin
hlcg:=thlcgaarch64.create;
create_codegen;
end;
end.
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