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345 lines
11 KiB
ObjectPascal
345 lines
11 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Florian Klaempfl
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This unit implements an asmoutput class for i386 AT&T syntax
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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{ This unit implements an asmoutput class for i386 AT&T syntax
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}
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unit agx86att;
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{$i fpcdefs.inc}
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interface
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uses
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cclasses,cpubase,
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globals,cgutils,
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aasmbase,aasmtai,aasmdata,assemble,aggas;
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type
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Tx86ATTAssembler=class(TGNUassembler)
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constructor create(smart: boolean); override;
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end;
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Tx86AppleGNUAssembler=class(TAppleGNUassembler)
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constructor create(smart: boolean); override;
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end;
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Tx86InstrWriter=class(TCPUInstrWriter)
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private
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procedure WriteReference(var ref : treference);
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procedure WriteOper(const o:toper);
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procedure WriteOper_jmp(const o:toper);
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public
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procedure WriteInstruction(hp: tai);override;
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end;
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implementation
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uses
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cutils,systems,
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verbose,
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itcpugas,
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cgbase,
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aasmcpu;
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{****************************************************************************
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Tx86ATTAssembler
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****************************************************************************}
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constructor Tx86ATTAssembler.create(smart: boolean);
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begin
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inherited create(smart);
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InstrWriter := Tx86InstrWriter.create(self);
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end;
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{****************************************************************************
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Tx86AppleGNUAssembler
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****************************************************************************}
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constructor Tx86AppleGNUAssembler.create(smart: boolean);
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begin
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inherited create(smart);
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InstrWriter := Tx86InstrWriter.create(self);
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end;
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{****************************************************************************
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Tx86InstrWriter
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****************************************************************************}
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procedure Tx86InstrWriter.WriteReference(var ref : treference);
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begin
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with ref do
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begin
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{ do we have a segment prefix ? }
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{ These are probably not correctly handled under GAS }
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{ should be replaced by coding the segment override }
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{ directly! - DJGPP FAQ }
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if segment<>NR_NO then
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owner.AsmWrite(gas_regname(segment)+':');
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if assigned(symbol) then
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owner.AsmWrite(symbol.name);
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if ref.refaddr=addr_pic then
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{$ifdef x86_64}
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owner.AsmWrite('@GOTPCREL');
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{$else x86_64}
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owner.AsmWrite('@GOT');
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{$endif x86_64}
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if offset<0 then
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owner.AsmWrite(tostr(offset))
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else
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if (offset>0) then
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begin
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if assigned(symbol) then
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owner.AsmWrite('+'+tostr(offset))
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else
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owner.AsmWrite(tostr(offset));
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end
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else if (index=NR_NO) and (base=NR_NO) and (not assigned(symbol)) then
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owner.AsmWrite('0');
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if (index<>NR_NO) and (base=NR_NO) then
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begin
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owner.AsmWrite('(,'+gas_regname(index));
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if scalefactor<>0 then
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owner.AsmWrite(','+tostr(scalefactor)+')')
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else
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owner.AsmWrite(')');
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end
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else
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if (index=NR_NO) and (base<>NR_NO) then
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owner.AsmWrite('('+gas_regname(base)+')')
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else
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if (index<>NR_NO) and (base<>NR_NO) then
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begin
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owner.AsmWrite('('+gas_regname(base)+','+gas_regname(index));
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if scalefactor<>0 then
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owner.AsmWrite(','+tostr(scalefactor));
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owner.AsmWrite(')');
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end;
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end;
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end;
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procedure Tx86InstrWriter.WriteOper(const o:toper);
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begin
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case o.typ of
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top_reg :
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owner.AsmWrite(gas_regname(o.reg));
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top_ref :
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if o.ref^.refaddr in [addr_no,addr_pic] then
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WriteReference(o.ref^)
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else
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begin
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owner.AsmWrite('$');
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if assigned(o.ref^.symbol) then
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owner.AsmWrite(o.ref^.symbol.name);
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if o.ref^.offset>0 then
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owner.AsmWrite('+'+tostr(o.ref^.offset))
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else
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if o.ref^.offset<0 then
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owner.AsmWrite(tostr(o.ref^.offset))
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else
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if not(assigned(o.ref^.symbol)) then
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owner.AsmWrite('0');
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end;
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top_const :
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owner.AsmWrite('$'+tostr(o.val));
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else
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internalerror(10001);
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end;
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end;
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procedure Tx86InstrWriter.WriteOper_jmp(const o:toper);
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begin
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case o.typ of
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top_reg :
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owner.AsmWrite('*'+gas_regname(o.reg));
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top_ref :
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begin
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if o.ref^.refaddr=addr_no then
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begin
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owner.AsmWrite('*');
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WriteReference(o.ref^);
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end
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else
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begin
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owner.AsmWrite(o.ref^.symbol.name);
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if o.ref^.refaddr=addr_pic then
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owner.AsmWrite('@PLT');
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if o.ref^.offset>0 then
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owner.AsmWrite('+'+tostr(o.ref^.offset))
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else
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if o.ref^.offset<0 then
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owner.AsmWrite(tostr(o.ref^.offset));
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end;
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end;
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top_const :
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owner.AsmWrite(tostr(o.val));
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else
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internalerror(10001);
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end;
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end;
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procedure Tx86InstrWriter.WriteInstruction(hp: tai);
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var
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op : tasmop;
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calljmp : boolean;
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i : integer;
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begin
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if hp.typ <> ait_instruction then
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exit;
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taicpu(hp).SetOperandOrder(op_att);
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op:=taicpu(hp).opcode;
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calljmp:=is_calljmp(op);
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owner.AsmWrite(#9);
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{ movsd should not be translated to movsl when there
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are (xmm) arguments }
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if (op=A_MOVSD) and (taicpu(hp).ops>0) then
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owner.AsmWrite('movsd')
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else
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owner.AsmWrite(gas_op2str[op]);
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owner.AsmWrite(cond2str[taicpu(hp).condition]);
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{ suffix needed ? fnstsw,fldcw don't support suffixes
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with binutils 2.9.5 under linux }
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{ if (Taicpu(hp).oper[0]^.typ=top_reg) and
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(Taicpu(hp).oper[0]^.reg.enum>lastreg) then
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internalerror(200301081);}
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if (not calljmp) and
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(gas_needsuffix[op]<>AttSufNONE) and
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(op<>A_FNSTSW) and
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(op<>A_FSTSW) and
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(op<>A_FNSTCW) and
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(op<>A_FSTCW) and
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(op<>A_FLDCW) and
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not(
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(taicpu(hp).ops<>0) and
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(taicpu(hp).oper[0]^.typ=top_reg) and
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(getregtype(taicpu(hp).oper[0]^.reg)=R_FPUREGISTER)
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) then
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owner.AsmWrite(gas_opsize2str[taicpu(hp).opsize]);
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{ process operands }
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if taicpu(hp).ops<>0 then
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begin
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if calljmp then
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begin
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owner.AsmWrite(#9);
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WriteOper_jmp(taicpu(hp).oper[0]^);
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end
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else
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begin
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for i:=0 to taicpu(hp).ops-1 do
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begin
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if i=0 then
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owner.AsmWrite(#9)
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else
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owner.AsmWrite(',');
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WriteOper(taicpu(hp).oper[i]^);
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end;
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end;
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end;
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owner.AsmLn;
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end;
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{*****************************************************************************
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Initialize
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*****************************************************************************}
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const
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{$ifdef x86_64}
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as_x86_64_as_info : tasminfo =
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(
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id : as_gas;
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idtxt : 'AS';
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asmbin : 'as';
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asmcmd : '--64 -o $OBJ $ASM';
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supported_target : system_any;
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flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
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labelprefix : '.L';
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comment : '# ';
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);
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{$else x86_64}
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as_i386_as_info : tasminfo =
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(
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id : as_gas;
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idtxt : 'AS';
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asmbin : 'as';
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asmcmd : '--32 -o $OBJ $ASM';
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supported_target : system_any;
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flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
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labelprefix : '.L';
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comment : '# ';
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);
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as_i386_as_aout_info : tasminfo =
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(
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id : as_i386_as_aout;
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idtxt : 'AS_AOUT';
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asmbin : 'as';
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asmcmd : '-o $OBJ $ASM';
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supported_target : system_any;
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flags : [af_allowdirect,af_needar];
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labelprefix : 'L';
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comment : '# ';
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);
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as_i386_gas_darwin_info : tasminfo =
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(
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id : as_darwin;
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idtxt : 'AS-Darwin';
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asmbin : 'as';
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asmcmd : '-o $OBJ $ASM -arch i386';
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supported_target : system_any;
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flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
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labelprefix : 'L';
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comment : '# ';
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);
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as_i386_gas_info : tasminfo =
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(
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id : as_ggas;
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idtxt : 'GAS';
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asmbin : 'gas';
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asmcmd : '--32 -o $OBJ $ASM';
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supported_target : system_any;
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flags : [af_allowdirect,af_needar,af_smartlink_sections,af_supports_dwarf];
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labelprefix : '.L';
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comment : '# ';
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);
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{$endif x86_64}
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initialization
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{$ifdef x86_64}
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RegisterAssembler(as_x86_64_as_info,Tx86ATTAssembler);
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{$else x86_64}
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RegisterAssembler(as_i386_as_info,Tx86ATTAssembler);
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RegisterAssembler(as_i386_gas_info,Tx86ATTAssembler);
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RegisterAssembler(as_i386_gas_darwin_info,Tx86AppleGNUAssembler);
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RegisterAssembler(as_i386_as_aout_info,Tx86ATTAssembler);
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{$endif x86_64}
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end.
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