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fpc/compiler/riscv/hlcgrv.pas
Jonas Maebe 4cd6f59bc3 * changed create_hlcodegen into a procvar, so that we don't have to insert 
hlcgllvm in the uses clause of every unit that calls create_hlcodegen
   o prevents dependency cycles that can cause llvm codegen units to init
     before the cpu variants, which is bad since the llvm versions have to
     override the cpu variants in their init code (+ added checks in the
     init code that they are in fact initialised later)

git-svn-id: branches/debug_eh@40410 -
2018-11-29 21:31:15 +00:00

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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 high-level code generator support shared by
riscv32 and riscv64
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 hlcgrv;
{$i fpcdefs.inc}
interface
uses
globals,
aasmdata,
symtype,symdef,
cgbase,cgutils,hlcgobj,hlcg2ll, parabase;
type
{ thlcgriscv }
thlcgriscv = class(thlcg2ll)
protected
procedure a_load_subsetref_regs_noindex(list: TAsmList; subsetsize: tdef; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister); override;
public
procedure g_intf_wrapper(list: TAsmList; procdef: tprocdef; const labelname: string; ioffset: longint);override;
procedure g_external_wrapper(list: TAsmList; procdef: tprocdef; const wrappername, externalname: string; global: boolean); override;
end;
implementation
uses
verbose,
systems,fmodule,
symconst, symsym,
aasmbase,aasmtai,aasmcpu,
cpubase,globtype,
procinfo,cpupi,cgobj,cgrv,
defutil;
{ thlcgriscv }
procedure thlcgriscv.a_load_subsetref_regs_noindex(list: TAsmList; subsetsize: tdef; loadbitsize: byte; const sref: tsubsetreference; valuereg, extra_value_reg: tregister);
var
fromsreg, tosreg: tsubsetregister;
restbits: byte;
begin
{ the code below is only valid for big endian }
if target_info.endian=endian_little then
begin
inherited;
exit
end;
restbits:=(sref.bitlen-(loadbitsize-sref.startbit));
if is_signed(subsetsize) then
begin
{ sign extend }
a_op_const_reg(list,OP_SHL,osuinttype,AIntBits-loadbitsize+sref.startbit,valuereg);
a_op_const_reg(list,OP_SAR,osuinttype,AIntBits-sref.bitlen,valuereg);
end
else
begin
a_op_const_reg(list,OP_SHL,osuinttype,restbits,valuereg);
{ mask other bits }
if (sref.bitlen<>AIntBits) then
a_op_const_reg(list,OP_AND,osuinttype,(aword(1) shl sref.bitlen)-1,valuereg);
end;
{ use subsetreg routine, it may have been overridden with an optimized version }
fromsreg.subsetreg:=extra_value_reg;
fromsreg.subsetregsize:=OS_INT;
{ subsetregs always count bits from right to left }
fromsreg.startbit:=loadbitsize-restbits;
fromsreg.bitlen:=restbits;
tosreg.subsetreg:=valuereg;
tosreg.subsetregsize:=OS_INT;
tosreg.startbit:=0;
tosreg.bitlen:=restbits;
a_load_subsetreg_subsetreg(list,subsetsize,subsetsize,fromsreg,tosreg);
end;
procedure thlcgriscv.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_X10,0,ctempposinvalid,sizeof(pint),[]);
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_X5);
end;
procedure op_onr12methodaddr;
var
tmpref,
href : treference;
l : TAsmLabel;
begin
if (procdef.extnumber=$ffff) then
Internalerror(200006139);
reference_reset_base(href,voidpointertype,NR_X5,tobjectdef(procdef.struct).vmtmethodoffset(procdef.extnumber),ctempposinvalid, sizeof(pint),[]);
cg.a_load_ref_reg(list,OS_ADDR,OS_ADDR,href,NR_X5);
list.concat(taicpu.op_reg_reg(A_JALR,NR_X0,NR_X5));
end;
var
make_global : boolean;
tmpref , href: treference;
l : TAsmLabel;
hsym: tsym;
paraloc: PCGParaLocation;
tmpreg: TRegister;
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,voidcodepointertype))
else
list.concat(Tai_symbol.Createname(labelname,AT_FUNCTION,0,voidcodepointertype));
{ the wrapper might need aktlocaldata for the additional data to
load the constant }
current_procinfo:=cprocinfo.create(nil);
{ 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 is_imm12(ioffset) 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_X6);
cg.a_op_reg_reg(list, OP_SUB, paraloc^.size, NR_X6, paraloc^.register);
end;
end;
else
internalerror(2010103102);
end;
{ case 4 }
if (po_virtualmethod in procdef.procoptions) and
not is_objectpascal_helper(procdef.struct) then
begin
loadvmttor12;
op_onr12methodaddr;
end
else
begin
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(procdef.mangledname,AT_FUNCTION),0,0,[]);
tmpreg:=NR_X5;
current_asmdata.getjumplabel(l);
cg.a_label(list, l);
href.refaddr:=addr_pcrel_hi20;
list.concat(taicpu.op_reg_ref(A_AUIPC,tmpreg,href));
reference_reset_symbol(href,l,0,0,[]);
href.refaddr:=addr_pcrel_lo12;
list.concat(taicpu.op_reg_reg_ref(A_JALR,NR_X0,tmpreg,href));
//list.concat(taicpu.op_reg_sym(A_JAL,NR_X0,current_asmdata.RefAsmSymbol(procdef.mangledname)));
end;
list.concatlist(current_procinfo.aktlocaldata);
current_procinfo.Free;
current_procinfo:=nil;
list.concat(Tai_symbol_end.Createname(labelname));
end;
procedure thlcgriscv.g_external_wrapper(list: TAsmList; procdef: tprocdef; const wrappername, externalname: string; global: boolean);
var
sym: tasmsymbol;
ai: taicpu;
href: treference;
tmpreg: TRegister;
l: TAsmLabel;
begin
maybe_new_object_file(list);
new_section(list,sec_code,wrappername,target_info.alignment.procalign);
if global then
begin
sym:=current_asmdata.DefineAsmSymbol(wrappername,AB_GLOBAL,AT_FUNCTION,procdef);
list.concat(Tai_symbol.Create_global(sym,0));
end
else
begin
sym:=current_asmdata.DefineAsmSymbol(wrappername,AB_LOCAL,AT_FUNCTION,procdef);
list.concat(Tai_symbol.Create(sym,0));
end;
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(externalname,AT_FUNCTION),0,0,[]);
tmpreg:=NR_X5;
current_asmdata.getjumplabel(l);
a_label(list,l);
href.refaddr:=addr_pcrel_hi20;
list.concat(taicpu.op_reg_ref(A_AUIPC,tmpreg,href));
reference_reset_symbol(href,l,0,0,[]);
href.refaddr:=addr_pcrel_lo12;
ai:=taicpu.op_reg_reg_ref(A_JALR,NR_X0,tmpreg,href);
ai.is_jmp:=true;
list.concat(ai);
list.concat(Tai_symbol_end.Create(sym));
end;
procedure create_hlcodegen_cpu;
begin
hlcg:=thlcgriscv.create;
// create_codegen;
end;
begin
chlcgobj:=thlcgriscv;
create_hlcodegen:=@create_hlcodegen_cpu;
end.
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