{
Copyright (c) 1998-2006 by the Free Pascal development team
This unit implements an asmoutput class for m68k GAS 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 ag68kgas;
{$i fpcdefs.inc}
interface
uses
cclasses,cpubase,
globals,
aasmbase,aasmtai,aasmdata,aasmcpu,assemble,aggas;
type
Tm68kGNUAssembler=class(TGNUassembler)
constructor create(smart: boolean); override;
end;
type
Tm68kInstrWriter=class(TCPUInstrWriter)
procedure WriteInstruction(hp: tai);override;
end;
const
gas_op2str:op2strtable=
{ warning: CPU32 opcodes are not fully compatible with the MC68020. }
{ 68000 only opcodes }
( '',
'abcd','add','adda','addi','addq','addx','and','andi',
'asl','asr','bcc','bcs','beq','bge','bgt','bhi',
'ble','bls','blt','bmi','bne','bpl','bvc','bvs',
'bchg','bclr','bra','bset','bsr','btst','chk',
'clr','cmp','cmpa','cmpi','cmpm','dbcc','dbcs','dbeq','dbge',
'dbgt','dbhi','dble','dbls','dblt','dbmi','dbne','dbra',
'dbpl','dbt','dbvc','dbvs','dbf','divs','divu',
'eor','eori','exg','illegal','ext','jmp','jsr',
'lea','link','lsl','lsr','move','movea','movei','moveq',
'movem','movep','muls','mulu','nbcd','neg','negx',
'nop','not','or','ori','pea','rol','ror','roxl',
'roxr','rtr','rts','sbcd','scc','scs','seq','sge',
'sgt','shi','sle','sls','slt','smi','sne',
'spl','st','svc','svs','sf','sub','suba','subi','subq',
'subx','swap','tas','trap','trapv','tst','unlk',
'rte','reset','stop',
{ mc68010 instructions }
'bkpt','movec','moves','rtd',
{ mc68020 instructions }
'bfchg','bfclr','bfexts','bfextu','bfffo',
'bfins','bfset','bftst','callm','cas','cas2',
'chk2','cmp2','divsl','divul','extb','pack','rtm',
'trapcc','tracs','trapeq','trapf','trapge','trapgt',
'traphi','traple','trapls','traplt','trapmi','trapne',
'trappl','trapt','trapvc','trapvs','unpk',
{ fpu processor instructions - directly supported only. }
{ ieee aware and misc. condition codes not supported }
'fabs','fadd',
'fbeq','fbne','fbngt','fbgt','fbge','fbnge',
'fblt','fbnlt','fble','fbgl','fbngl','fbgle','fbngle',
'fdbeq','fdbne','fdbgt','fdbngt','fdbge','fdbnge',
'fdblt','fdbnlt','fdble','fdbgl','fdbngl','fdbgle','fdbngle',
'fseq','fsne','fsgt','fsngt','fsge','fsnge',
'fslt','fsnlt','fsle','fsgl','fsngl','fsgle','fsngle',
'fcmp','fdiv','fmove','fmovem',
'fmul','fneg','fnop','fsqrt','fsub','fsgldiv',
'fsflmul','ftst',
'ftrapeq','ftrapne','ftrapgt','ftrapngt','ftrapge','ftrapnge',
'ftraplt','ftrapnlt','ftraple','ftrapgl','ftrapngl','ftrapgle','ftrapngle',
{ protected instructions }
'cprestore','cpsave',
{ fpu unit protected instructions }
{ and 68030/68851 common mmu instructions }
{ (this may include 68040 mmu instructions) }
'frestore','fsave','pflush','pflusha','pload','pmove','ptest',
{ useful for assembly language output }
'label','db','s','b','fb');
gas_opsize2str : array[topsize] of string[2] =
('','.b','.w','.l','.s','.d','.x',''
);
{
gas_reg2str : treg2strtable =
('', '%d0','%d1','%d2','%d3','%d4','%d5','%d6','%d7',
'%a0','%a1','%a2','%a3','%a4','%a5','%a6','%sp',
'-(%sp)','(%sp)+',
'%ccr','%fp0','%fp1','%fp2','%fp3','%fp4','%fp5',
'%fp6','%fp7','%fpcr','%sr','%ssp','%dfc',
'%sfc','%vbr','%fpsr');
}
implementation
uses
cutils,systems,
cgbase,cgutils,
verbose,itcpugas;
{****************************************************************************}
{ GNU m68k Assembler writer }
{****************************************************************************}
constructor Tm68kGNUAssembler.create(smart: boolean);
begin
inherited create(smart);
InstrWriter := Tm68kInstrWriter.create(self);
end;
function getreferencestring(var ref : treference) : string;
var
s,basestr,indexstr : string;
begin
s:='';
with ref do
begin
basestr:=gas_regname(base);
indexstr:=gas_regname(index);
if assigned(symbol) then
s:=s+symbol.name;
if offset<0 then s:=s+tostr(offset)
else if (offset>0) then
begin
if (symbol=nil) then s:=tostr(offset)
else s:=s+'+'+tostr(offset);
end
else if (index=NR_NO) and (base=NR_NO) and not assigned(symbol) then
s:=s+'0';
if (index<>NR_NO) and (base=NR_NO) and (direction=dir_none) then
begin
if (scalefactor = 1) or (scalefactor = 0) then
s:=s+'(,'+indexstr+'.l)'
else
s:=s+'(,'+indexstr+'.l*'+tostr(scalefactor)+')'
end
else if (index=NR_NO) and (base<>NR_NO) and (direction=dir_inc) then
begin
if (scalefactor = 1) or (scalefactor = 0) then
s:=s+'('+basestr+')+'
else
InternalError(10002);
end
else if (index=NR_NO) and (base<>NR_NO) and (direction=dir_dec) then
begin
if (scalefactor = 1) or (scalefactor = 0) then
s:=s+'-('+basestr+')'
else
InternalError(10003);
end
else if (index=NR_NO) and (base<>NR_NO) and (direction=dir_none) then
begin
s:=s+'('+basestr+')'
end
else if (index<>NR_NO) and (base<>NR_NO) and (direction=dir_none) then
begin
if (scalefactor = 1) or (scalefactor = 0) then
s:=s+'('+basestr+','+indexstr+'.l)'
else
s:=s+'('+basestr+','+indexstr+'.l*'+tostr(scalefactor)+')';
end;
end;
getreferencestring:=s;
end;
function getopstr(const o:toper) : string;
var
hs : string;
i : tsuperregister;
begin
case o.typ of
top_reg: begin
getopstr:=gas_regname(o.reg);
// writeln('top_reg:',getopstr,'!');
end;
top_ref:
if o.ref^.refaddr=addr_full then
begin
if assigned(o.ref^.symbol) then
hs:=o.ref^.symbol.name
else
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)
else
if not(assigned(o.ref^.symbol)) then
hs:=hs+'0';
getopstr:=hs;
end
else
getopstr:=getreferencestring(o.ref^);
top_regset:
begin
hs:='';
for i:=RS_D0 to RS_D7 do
begin
if i in o.regset^ then
hs:=hs+gas_regname(newreg(R_INTREGISTER,i,R_SUBWHOLE))+'/';
end;
for i:=RS_A0 to RS_SP do
begin
if i in o.regset^ then
hs:=hs+gas_regname(newreg(R_INTREGISTER,i,R_SUBWHOLE))+'/';
end;
delete(hs,length(hs),1);
getopstr := hs;
end;
top_const:
getopstr:='#'+tostr(longint(o.val));
else internalerror(200405021);
end;
end;
function getopstr_jmp(const o:toper) : string;
var
hs : string;
begin
case o.typ of
top_reg:
getopstr_jmp:=gas_regname(o.reg);
top_ref:
if o.ref^.refaddr=addr_no then
getopstr_jmp:=getreferencestring(o.ref^)
else
begin
if assigned(o.ref^.symbol) then
hs:=o.ref^.symbol.name
else
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)
else
if not(assigned(o.ref^.symbol)) then
hs:=hs+'0';
getopstr_jmp:=hs;
end;
top_const:
getopstr_jmp:=tostr(o.val);
else internalerror(200405022);
end;
end;
{****************************************************************************
TM68kASMOUTPUT
****************************************************************************}
{ returns the opcode string }
function getopcodestring(hp : tai) : string;
var
op : tasmop;
s : string;
begin
op:=taicpu(hp).opcode;
{ old versions of GAS don't like PEA.L and LEA.L }
if (op in [
A_LEA,A_PEA,A_ABCD,A_BCHG,A_BCLR,A_BSET,A_BTST,
A_EXG,A_NBCD,A_SBCD,A_SWAP,A_TAS,A_SCC,A_SCS,
A_SEQ,A_SGE,A_SGT,A_SHI,A_SLE,A_SLS,A_SLT,A_SMI,
A_SNE,A_SPL,A_ST,A_SVC,A_SVS,A_SF]) then
s:=gas_op2str[op]
else
if op = A_SXX then
s:=gas_op2str[op]+cond2str[taicpu(hp).condition]
else
{ size of DBRA is always WORD, doesn't need opsize (KB) }
if op = A_DBRA then
s:=gas_op2str[op]+cond2str[taicpu(hp).condition]
else
if op in [a_dbxx,a_bxx,a_fbxx] then
s:=gas_op2str[op]+cond2str[taicpu(hp).condition]+gas_opsize2str[taicpu(hp).opsize]
else
s:=gas_op2str[op]+gas_opsize2str[taicpu(hp).opsize];
if op = A_FMOVE then begin
writeln('fmove! opsize:',dword(taicpu(hp).opsize));
end;
getopcodestring:=s;
end;
procedure Tm68kInstrWriter.WriteInstruction(hp: tai);
var
op : tasmop;
s : string;
sep : char;
calljmp : boolean;
i : integer;
begin
if hp.typ <> ait_instruction then exit;
op:=taicpu(hp).opcode;
calljmp:=is_calljmp(op);
{ call maybe not translated to call }
s:=#9+getopcodestring(hp);
{ process operands }
if taicpu(hp).ops<>0 then
begin
{ call and jmp need an extra handling }
{ this code is only called if jmp isn't a labeled instruction }
{ quick hack to overcome a problem with manglednames=255 chars }
if calljmp then
begin
owner.AsmWrite(s+#9);
s:=getopstr_jmp(taicpu(hp).oper[0]^);
{ dbcc dx,<sym> has two operands! (KB) }
if (taicpu(hp).ops>1) then
s:=s+','+getopstr_jmp(taicpu(hp).oper[1]^);
if (taicpu(hp).ops>2) then
internalerror(2006120501);
end
else
begin
for i:=0 to taicpu(hp).ops-1 do
begin
if i=0 then
sep:=#9
else
if ((op = A_DIVSL) or
(op = A_DIVUL) or
(op = A_MULU) or
(op = A_MULS) or
(op = A_DIVS) or
(op = A_DIVU)) and (i=2) then
begin
sep:=':'
end else
sep:=',';
s:=s+sep+getopstr(taicpu(hp).oper[i]^)
end;
end;
end;
owner.AsmWriteLn(s);
end;
{*****************************************************************************
Initialize
*****************************************************************************}
const
as_m68k_as_info : tasminfo =
(
id : as_gas;
idtxt : 'AS';
asmbin : 'as';
asmcmd : '-o $OBJ $ASM';
supported_target : system_any;
flags : [af_allowdirect,af_needar,af_smartlink_sections];
labelprefix : '.L';
comment : '# ';
);
initialization
RegisterAssembler(as_m68k_as_info,Tm68kGNUAssembler);
end.
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