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fpc/compiler/sparc/cpugas.pas

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{
Copyright (c) 1999-2003 by Florian Klaempfl
This unit implements an asmoutput class for SPARC AT&T syntax
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 cpugas;
{$i fpcdefs.inc}
interface
uses
cpubase,
aasmtai,aasmdata,aasmcpu,assemble,aggas,
cgutils,globtype;
type
TGasSPARC=class(TGnuAssembler)
constructor create(smart: boolean); override;
{# Constructs the command line for calling the assembler }
function MakeCmdLine: TCmdStr; override;
end;
TSPARCInstrWriter=class(TCPUInstrWriter)
procedure WriteInstruction(hp:Tai);override;
function GetReferenceString(var ref : TReference):string;
function getopstr(const Oper:TOper):string;
end;
implementation
uses
cutils,systems,globals,cpuinfo,procinfo,
verbose,itcpugas,cgbase;
{****************************************************************************}
{ GNU PPC Assembler writer }
{****************************************************************************}
constructor TGasSPARC.create(smart: boolean);
begin
inherited create(smart);
InstrWriter := TSPARCInstrWriter.create(self);
end;
function TGasSPARC.MakeCmdLine: TCmdStr;
begin
result := Inherited MakeCmdLine;
{ ARCH selection }
// Note for casual readers: gas (GNU as) uses -Av7, -Av8, -Av9 etc. on SPARC,
// rather than variants of the -m option used by most other CPUs. Solaris as
// uses -xarch=v7, -xarch=v8 etc., that form is not supported here since there
// are probably other incompatibilties between the GNU and Solaris binutils
// that need to be reviewed.
//
// v9 is required as the default since the RTL started using membar at 2.2.2.
case current_settings.cputype of
cpu_SPARC_V7: Replace(result,'$ARCH','-Av7');
cpu_SPARC_V8: Replace(result,'$ARCH','-Av8')
else
Replace(result,'$ARCH','-Av9')
end
end;
function TSPARCInstrWriter.GetReferenceString(var ref:TReference):string;
var
asm_comment : string;
begin
GetReferenceString:='';
asm_comment:='';
with ref do
begin
if (base=NR_NO) and (index=NR_NO) then
begin
if assigned(symbol) then
GetReferenceString:=symbol.name;
if offset>0 then
GetReferenceString:=GetReferenceString+'+'+ToStr(offset)
else if offset<0 then
GetReferenceString:=GetReferenceString+ToStr(offset);
case refaddr of
addr_high:
GetReferenceString:='%hi('+GetReferenceString+')';
addr_low:
GetReferenceString:='%lo('+GetReferenceString+')';
addr_pic:
begin
asm_comment:='addr_pic should use %l7 register as base or index: '+GetReferenceString;
Comment(V_Warning,asm_comment);
GetReferenceString:='%l7+'+GetReferenceString;
end;
end;
end
else
begin
if (base=NR_NO) and (index<>NR_NO) then
begin
base:=index;
index:=NR_NO;
end;
{$ifdef extdebug}
if assigned(symbol) and
not(refaddr in [addr_pic,addr_low]) then
internalerror(2003052601);
{$endif extdebug}
GetReferenceString:=GetReferenceString+gas_regname(base);
if index=NR_NO then
begin
{ if (Offset<simm13lo) or (Offset>simm13hi) then
internalerror(2003053008); }
if offset>0 then
GetReferenceString:=GetReferenceString+'+'+ToStr(offset)
else if offset<0 then
GetReferenceString:=GetReferenceString+ToStr(offset);
{
else if (offset=0) and not(assigned(symbol)) then
GetReferenceString:=GetReferenceString+ToStr(offset);
}
if assigned(symbol) then
begin
if refaddr=addr_low then
GetReferenceString:='%lo('+symbol.name+')+'+GetReferenceString
else if refaddr=addr_pic then
begin
if assigned(current_procinfo) and (base <> current_procinfo.got) then
begin
asm_comment:=' pic address should use %l7 register: '+GetReferenceString;
Comment(V_Warning,asm_comment);
end;
GetReferenceString:=GetReferenceString+'+'+symbol.name;
end
else
GetReferenceString:=symbol.name+'+'+GetReferenceString;
end;
end
else
begin
{$ifdef extdebug}
if (Offset<>0) or assigned(symbol) then
internalerror(2003052603);
{$endif extdebug}
GetReferenceString:=GetReferenceString+'+'+gas_regname(index);
end;
end;
end;
if asm_comment <> '' then
begin
owner.AsmWrite(target_asm.comment+' '+asm_comment);
owner.AsmLn;
end;
end;
function TSPARCInstrWriter.getopstr(const Oper:TOper):string;
begin
with Oper do
case typ of
top_reg:
getopstr:=gas_regname(reg);
top_const:
getopstr:=tostr(longint(val));
top_ref:
if (oper.ref^.refaddr in [addr_no,addr_pic]) or
((oper.ref^.refaddr=addr_low) and ((oper.ref^.base<>NR_NO) or
(oper.ref^.index<>NR_NO))) then
getopstr:='['+getreferencestring(ref^)+']'
else
getopstr:=getreferencestring(ref^);
else
internalerror(10001);
end;
end;
procedure TSPARCInstrWriter.WriteInstruction(hp:Tai);
var
Op:TAsmOp;
s:String;
i:Integer;
begin
if hp.typ<>ait_instruction then
exit;
op:=taicpu(hp).opcode;
{ translate pseudoops, this should be move to a separate pass later, so it's done before
peephole optimization }
case op of
A_FABSd:
begin
if (taicpu(hp).ops<>2) or
(taicpu(hp).oper[0]^.typ<>top_reg) or
(taicpu(hp).oper[1]^.typ<>top_reg) then
internalerror(200401045);
{ FABSs %f<even>,%f<even> }
s:=#9+std_op2str[A_FABSs]+#9+getopstr(taicpu(hp).oper[0]^)+','+getopstr(taicpu(hp).oper[1]^);
owner.AsmWriteLn(s);
{ FMOVs %f<odd>,%f<odd> }
inc(taicpu(hp).oper[0]^.reg);
inc(taicpu(hp).oper[1]^.reg);
s:=#9+std_op2str[A_FMOVs]+#9+getopstr(taicpu(hp).oper[0]^)+','+getopstr(taicpu(hp).oper[1]^);
dec(taicpu(hp).oper[0]^.reg);
dec(taicpu(hp).oper[1]^.reg);
owner.AsmWriteLn(s);
end;
A_FMOVd:
begin
if (taicpu(hp).ops<>2) or
(taicpu(hp).oper[0]^.typ<>top_reg) or
(taicpu(hp).oper[1]^.typ<>top_reg) then
internalerror(200401045);
{ FMOVs %f<even>,%f<even> }
s:=#9+std_op2str[A_FMOVs]+#9+getopstr(taicpu(hp).oper[0]^)+','+getopstr(taicpu(hp).oper[1]^);
owner.AsmWriteLn(s);
{ FMOVs %f<odd>,%f<odd> }
inc(taicpu(hp).oper[0]^.reg);
inc(taicpu(hp).oper[1]^.reg);
s:=#9+std_op2str[A_FMOVs]+#9+getopstr(taicpu(hp).oper[0]^)+','+getopstr(taicpu(hp).oper[1]^);
dec(taicpu(hp).oper[0]^.reg);
dec(taicpu(hp).oper[1]^.reg);
owner.AsmWriteLn(s);
end
else
begin
{ call maybe not translated to call }
s:=#9+std_op2str[op]+cond2str[taicpu(hp).condition];
if taicpu(hp).delayslot_annulled then
s:=s+',a';
if taicpu(hp).ops>0 then
begin
s:=s+#9+getopstr(taicpu(hp).oper[0]^);
for i:=1 to taicpu(hp).ops-1 do
s:=s+','+getopstr(taicpu(hp).oper[i]^);
end;
owner.AsmWriteLn(s);
end;
end;
end;
const
as_sparc_as_info : tasminfo =
(
id : as_gas;
idtxt : 'AS';
asmbin : 'as';
{$ifdef FPC_SPARC_V8_ONLY}
asmcmd : '$PIC -o $OBJ $ASM';
{$else}
asmcmd : '$ARCH $PIC -o $OBJ $ASM';
{$endif}
supported_targets : [system_sparc_solaris,system_sparc_linux,system_sparc_embedded];
flags : [af_needar,af_smartlink_sections];
labelprefix : '.L';
comment : '# ';
dollarsign: '$';
);
as_sparc_gas_info : tasminfo =
(
id : as_ggas;
idtxt : 'GAS';
asmbin : 'gas';
asmcmd : '$ARCH $PIC -o $OBJ $ASM';
supported_targets : [system_sparc_solaris,system_sparc_linux,system_sparc_embedded];
flags : [af_needar,af_smartlink_sections];
labelprefix : '.L';
comment : '# ';
dollarsign: '$';
);
begin
RegisterAssembler(as_SPARC_as_info,TGasSPARC);
RegisterAssembler(as_SPARC_gas_info,TGasSPARC);
end.
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