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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;
end.
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