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335 lines
10 KiB
ObjectPascal
335 lines
10 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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This unit implements an asmoutput class for m68k GAS 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 agcpugas;
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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,
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aasmbase,aasmtai,aasmcpu,assemble,aggas;
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type
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TM68kAssembler=class(TGNUassembler)
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public
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procedure WriteInstruction(hp: tai);override;
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end;
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const
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gas_opsize2str : array[topsize] of string[2] =
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('','.b','.w','.l','.s','.d','.x',''
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);
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implementation
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uses
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cutils,systems,
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cgbase,
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verbose,itcpugas;
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function getreferencestring(var ref : treference) : string;
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var
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s,basestr,indexstr : string;
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begin
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s:='';
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with ref do
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begin
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basestr:=gas_regname(base);
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indexstr:=gas_regname(index);
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if assigned(symbol) then
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s:=s+symbol.name;
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if offset<0 then s:=s+tostr(offset)
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else if (offset>0) then
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begin
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if (symbol=nil) then s:=tostr(offset)
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else s:=s+'+'+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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s:=s+'0';
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if (index<>NR_NO) and (base=NR_NO) and (direction=dir_none) then
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begin
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if (scalefactor = 1) or (scalefactor = 0) then
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s:=s+'(,'+indexstr+'.l)'
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else
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s:=s+'(,'+indexstr+'.l*'+tostr(scalefactor)+')'
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end
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else if (index=NR_NO) and (base<>NR_NO) and (direction=dir_inc) then
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begin
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if (scalefactor = 1) or (scalefactor = 0) then
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s:=s+'('+basestr+')+'
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else
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InternalError(10002);
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end
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else if (index=NR_NO) and (base<>NR_NO) and (direction=dir_dec) then
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begin
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if (scalefactor = 1) or (scalefactor = 0) then
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s:=s+'-('+basestr+')'
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else
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InternalError(10003);
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end
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else if (index=NR_NO) and (base<>NR_NO) and (direction=dir_none) then
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begin
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s:=s+'('+basestr+')'
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end
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else if (index<>NR_NO) and (base<>NR_NO) and (direction=dir_none) then
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begin
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if (scalefactor = 1) or (scalefactor = 0) then
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s:=s+'('+basestr+','+indexstr+'.l)'
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else
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s:=s+'('+basestr+','+indexstr+'.l*'+tostr(scalefactor)+')';
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end;
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end;
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getreferencestring:=s;
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end;
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function getopstr(const o:toper) : string;
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var
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hs : string;
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i : tsuperregister;
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begin
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case o.typ of
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top_reg:
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getopstr:=gas_regname(o.reg);
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top_ref:
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if o.ref^.refaddr=addr_full then
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begin
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if assigned(o.ref^.symbol) then
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hs:='#'+o.ref^.symbol.name
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else
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hs:='#';
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if o.ref^.offset>0 then
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hs:=hs+'+'+tostr(o.ref^.offset)
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else
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if o.ref^.offset<0 then
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hs:=hs+tostr(o.ref^.offset)
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else
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if not(assigned(o.ref^.symbol)) then
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hs:=hs+'0';
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getopstr:=hs;
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end
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else
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getopstr:=getreferencestring(o.ref^);
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top_reglist:
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begin
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hs:='';
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for i:=RS_D0 to RS_D7 do
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begin
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if i in o.regset^ then
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hs:=hs+gas_regname(newreg(R_INTREGISTER,i,R_SUBWHOLE))+'/';
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end;
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for i:=RS_A0 to RS_SP do
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begin
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if i in o.regset^ then
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hs:=hs+gas_regname(newreg(R_INTREGISTER,i,R_SUBWHOLE))+'/';
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end;
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delete(hs,length(hs),1);
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getopstr := hs;
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end;
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top_const:
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getopstr:='#'+tostr(longint(o.val));
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else internalerror(200405021);
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end;
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end;
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function getopstr_jmp(const o:toper) : string;
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var
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hs : string;
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begin
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case o.typ of
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top_reg:
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getopstr_jmp:=gas_regname(o.reg);
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top_ref:
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if o.ref^.refaddr=addr_no then
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getopstr_jmp:=getreferencestring(o.ref^)
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else
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begin
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if assigned(o.ref^.symbol) then
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hs:=o.ref^.symbol.name
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else
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hs:='';
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if o.ref^.offset>0 then
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hs:=hs+'+'+tostr(o.ref^.offset)
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else
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if o.ref^.offset<0 then
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hs:=hs+tostr(o.ref^.offset)
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else
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if not(assigned(o.ref^.symbol)) then
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hs:=hs+'0';
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getopstr_jmp:=hs;
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end;
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top_const:
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getopstr_jmp:=tostr(o.val);
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else internalerror(200405022);
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end;
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end;
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{****************************************************************************
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TM68kASMOUTPUT
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****************************************************************************}
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{ returns the opcode string }
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function getopcodestring(hp : tai) : string;
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var
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op : tasmop;
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s : string;
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begin
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op:=taicpu(hp).opcode;
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{ old versions of GAS don't like PEA.L and LEA.L }
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if (op in [
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A_LEA,A_PEA,A_ABCD,A_BCHG,A_BCLR,A_BSET,A_BTST,
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A_EXG,A_NBCD,A_SBCD,A_SWAP,A_TAS,A_SCC,A_SCS,
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A_SEQ,A_SGE,A_SGT,A_SHI,A_SLE,A_SLS,A_SLT,A_SMI,
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A_SNE,A_SPL,A_ST,A_SVC,A_SVS,A_SF]) then
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s:=gas_op2str[op]
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else
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if op = A_SXX then
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s:=gas_op2str[op]+cond2str[taicpu(hp).condition]
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else
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if op in [a_dbxx,a_bxx,a_fbxx] then
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s:=gas_op2str[op]+cond2str[taicpu(hp).condition]+gas_opsize2str[taicpu(hp).opsize]
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else
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s:=gas_op2str[op]+gas_opsize2str[taicpu(hp).opsize];
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getopcodestring:=s;
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end;
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procedure TM68kAssembler.WriteInstruction(hp: tai);
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var
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op : tasmop;
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s : string;
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sep : char;
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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 exit;
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op:=taicpu(hp).opcode;
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calljmp:=is_calljmp(op);
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{ call maybe not translated to call }
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s:=#9+getopcodestring(hp);
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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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{ call and jmp need an extra handling }
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{ this code is only called if jmp isn't a labeled instruction }
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{ quick hack to overcome a problem with manglednames=255 chars }
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if calljmp then
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begin
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AsmWrite(s+#9);
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s:=getopstr_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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sep:=#9
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else
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if ((op = A_DIVSL) or
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(op = A_DIVUL) or
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(op = A_MULU) or
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(op = A_MULS) or
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(op = A_DIVS) or
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(op = A_DIVU)) and (i=1) then
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sep:=':'
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else
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sep:=',';
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s:=s+sep+getopstr(taicpu(hp).oper[i]^)
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end;
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end;
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end;
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AsmWriteLn(s);
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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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as_m68k_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 : '-o $OBJ $ASM';
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supported_target : system_any;
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outputbinary: false;
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allowdirect : true;
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needar : true;
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labelprefix_only_inside_procedure : false;
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labelprefix : '.L';
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comment : '# ';
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secnames : ('',
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'.text','.data','.bss',
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'','','','','','',
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'.stab','.stabstr','COMMON')
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);
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initialization
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RegisterAssembler(as_m68k_as_info,TM68kAssembler);
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end.
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{
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$Log$
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Revision 1.11 2004-05-01 23:29:01 florian
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* continued to fix m68k compiler compilation
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Revision 1.10 2004/04/27 15:46:01 florian
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* several updates for compilation
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Revision 1.9 2004/04/27 15:00:37 florian
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- removed offsetfixup reference
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Revision 1.8 2004/04/25 21:26:16 florian
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* some m68k stuff fixed
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Revision 1.7 2003/02/19 22:00:16 daniel
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* Code generator converted to new register notation
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- Horribily outdated todo.txt removed
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Revision 1.6 2003/02/15 22:19:40 carl
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* bugfix of emissions of jmp instructions
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Revision 1.5 2003/01/08 18:43:57 daniel
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* Tregister changed into a record
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Revision 1.4 2002/11/30 23:33:02 carl
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* merges from Pierre's fixes in m68k fixes branch
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Revision 1.3 2002/09/07 15:25:11 peter
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* old logs removed and tabs fixed
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Revision 1.2 2002/08/13 18:58:54 carl
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+ m68k problems with cvs fixed?()!
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}
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