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{
Copyright (c) 1998-2002 by Florian Klaempfl
This unit the GAS asm writers for Risc-V32/Risc-V64
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.
****************************************************************************
}
{****************************************************************************}
{ Helper routines for Instruction Writer }
{****************************************************************************}
unit agrvgas;
{$i fpcdefs.inc}
interface
uses
systems,aasmbase,
aasmtai,aasmdata,
aggas,
assemble,
cpubase,cgutils,
globtype;
type
TRVInstrWriter=class(TCPUInstrWriter)
procedure WriteInstruction(hp : tai);override;
end;
TRVGNUAssembler=class(TGNUassembler)
constructor CreateWithWriter(info: pasminfo; wr: TExternalAssemblerOutputFile; freewriter, smart: boolean); override;
function MakeCmdLine: TCmdStr; override;
end;
implementation
uses
cutils,globals,verbose,
cgbase,
itcpugas,cpuinfo,
aasmcpu;
function getreferencestring(asminfo: pasminfo; var ref : treference) : string;
var
s : string;
begin
with ref do
begin
if ((offset < -2048) or (offset > 2047)) and
(refaddr = addr_no) then
internalerror(2006052501);
case refaddr of
addr_no:
s := '';
addr_pic_no_got:
internalerror(2016060501);
else
begin
s :='';
s := s+'(';
if assigned(symbol) then
begin
if asminfo^.dollarsign<>'$' then
begin
s:=s+ReplaceForbiddenAsmSymbolChars(symbol.name);
if assigned(relsymbol) then
s:=s+'-'+ReplaceForbiddenAsmSymbolChars(relsymbol.name)
end
else
begin
s:=s+symbol.name;
if assigned(relsymbol) then
s:=s+'-'+relsymbol.name;
end;
end;
end;
end;
if offset<0 then
s:=s+tostr(offset)
else
if (offset>0) then
begin
if assigned(symbol) then
s:=s+'+'+tostr(offset)
else
s:=s+tostr(offset);
end;
if not(refaddr in [addr_no,addr_pic_no_got]) then
begin
s := s+')';
end;
{$ifdef cpu64bitaddr}
if (refaddr=addr_pic) then
s := s + '@got';
{$endif cpu64bitaddr}
if (index=NR_NO) then
begin
if offset=0 then
begin
if not (assigned(symbol)) then
s:=s+'0';
end;
if (base<>NR_NO) then
s:=s+'('+gas_regname(base)+')'
else if not assigned(symbol) then
s:=s+'(0)';
end
else if (index<>NR_NO) and (base<>NR_NO) then
begin
if (offset=0) then
s:=s+gas_regname(base)+','+gas_regname(index)
else
internalerror(2006052502);
end;
case refaddr of
addr_lo12: s:='%lo'+s;
addr_hi20: s:='%hi'+s;
addr_pcrel_lo12: s:='%pcrel_lo'+s;
addr_pcrel_hi20: s:='%pcrel_hi'+s;
end;
end;
getreferencestring:=s;
end;
function getopstr(asminfo: pasminfo; const o:toper) : string;
var
hs : string;
begin
case o.typ of
top_reg:
getopstr:=gas_regname(o.reg);
top_const:
getopstr:=tostr(longint(o.val));
top_ref:
if o.ref^.refaddr=addr_full then
begin
hs:=o.ref^.symbol.name;
if asminfo^.dollarsign<>'$' then
hs:=ReplaceForbiddenAsmSymbolChars(hs);
if o.ref^.offset>0 then
hs:=hs+'+'+tostr(o.ref^.offset)
else
if o.ref^.offset<0 then
hs:=hs+tostr(o.ref^.offset);
getopstr:=hs;
end
else
getopstr:=getreferencestring(asminfo,o.ref^);
top_fenceflags:
begin
getopstr:='';
if ffI in o.fenceflags then getopstr:=getopstr+'i';
if ffO in o.fenceflags then getopstr:=getopstr+'o';
if ffR in o.fenceflags then getopstr:=getopstr+'r';
if ffW in o.fenceflags then getopstr:=getopstr+'w';
end
else
internalerror(2002070604);
end;
end;
Procedure TRVInstrWriter.WriteInstruction(hp : tai);
var op: TAsmOp;
s: string;
i: byte;
sep: string[3];
begin
s:=#9+gas_op2str[taicpu(hp).opcode];
if taicpu(hp).condition<>C_None then
s:=s+cond2str[taicpu(hp).condition];
if taicpu(hp).memoryordering<>[] then
begin
s:=s+'.';
if moAq in taicpu(hp).memoryordering then s:=s+'aq';
if moRl in taicpu(hp).memoryordering then s:=s+'rl';
end;
if taicpu(hp).ops<>0 then
begin
sep:=#9;
for i:=0 to taicpu(hp).ops-1 do
begin
s:=s+sep+getopstr(owner.asminfo,taicpu(hp).oper[i]^);
sep:=',';
end;
end;
owner.writer.AsmWriteLn(s);
end;
{****************************************************************************}
{ GNU RiscV Assembler writer }
{****************************************************************************}
constructor TRVGNUAssembler.CreateWithWriter(info: pasminfo; wr: TExternalAssemblerOutputFile; freewriter, smart: boolean);
begin
inherited;
InstrWriter := TRVInstrWriter.create(self);
end;
function TRVGNUAssembler.MakeCmdLine: TCmdStr;
begin
result := inherited MakeCmdLine;
Replace(result,'$ARCH',lower(cputypestr[current_settings.cputype]));
end;
const
as_riscv_gas_info : tasminfo =
(
id : as_gas;
idtxt : 'AS';
asmbin : 'as';
asmcmd : '-o $OBJ $EXTRAOPT -march=$ARCH $ASM';
supported_targets : [system_riscv32_linux,system_riscv64_linux];
flags : [af_needar,af_smartlink_sections];
labelprefix : '.L';
comment : '# ';
dollarsign: '$';
);
begin
RegisterAssembler(as_riscv_gas_info,TRVGNUAssembler);
end.
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