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+{
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+ $Id$
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+ Copyright (c) 1998-2002 by Florian Klaempfl
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+
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+ This unit implements an asmoutput class for m68k GAS syntax
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+
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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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+
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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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+
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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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+}
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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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+
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+{$i fpcdefs.inc}
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+
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+interface
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+
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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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+
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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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+
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+ const
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+ gas_op2str:op2strtable=
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+ { 68000 only instructions }
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+ ('abcd','add', 'adda','addi','addq','addx','and','andi',
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+ 'asl','asr','bcc','bcs','beq','bge','bgt','bhi',
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+ 'ble','bls','blt','bmi','bne','bpl','bvc','bvs',
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+ 'bchg','bclr','bra','bset','bsr','btst','chk',
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+ 'clr','cmp','cmpa','cmpi','cmpm','dbcc','dbcs','dbeq','dbge',
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+ 'dbgt','dbhi','dble','dbls','dblt','dbmi','dbne','dbra',
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+ 'dbpl','dbt','dbvc','dbvs','dbf','divs','divu',
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+ 'eor','eori','exg','illegal','ext','jmp','jsr',
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+ 'lea','link','lsl','lsr','move','movea','movei','moveq',
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+ 'movem','movep','muls','mulu','nbcd','neg','negx',
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+ 'nop','not','or','ori','pea','rol','ror','roxl',
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+ 'roxr','rtr','rts','sbcd','scc','scs','seq','sge',
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+ 'sgt','shi','sle','sls','slt','smi','sne',
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+ 'spl','st','svc','svs','sf','sub','suba','subi','subq',
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+ 'subx','swap','tas','trap','trapv','tst','unlk',
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+ 'rte','reset','stop',
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+ { MC68010 instructions }
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+ 'bkpt','movec','moves','rtd',
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+ { MC68020 instructions }
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+ 'bfchg','bfclr','bfexts','bfextu','bfffo',
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+ 'bfins','bfset','bftst','callm','cas','cas2',
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+ 'chk2','cmp2','divsl','divul','extb','pack','rtm',
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+ 'trapcc','tracs','trapeq','trapf','trapge','trapgt',
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+ 'traphi','traple','trapls','traplt','trapmi','trapne',
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+ 'trappl','trapt','trapvc','trapvs','unpk',
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+ { FPU Processor instructions - directly supported only. }
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+ { IEEE aware and misc. condition codes not supported }
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+ 'fabs','fadd',
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+ 'fbeq','fbne','fbngt','fbgt','fbge','fbnge',
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+ 'fblt','fbnlt','fble','fbgl','fbngl','fbgle','fbngle',
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+ 'fdbeq','fdbne','fdbgt','fdbngt','fdbge','fdnbge',
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+ 'fdblt','fdbnlt','fdble','fdbgl','fdbngl','fdbgle','fbdngle',
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+ 'fseq','fsne','fsgt','fsngt','fsge','fsnge',
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+ 'fslt','fsnlt','fsle','fsgl','fsngl','fsgle','fsngle',
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+ 'fcmp','fdiv','fmove','fmovem',
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+ 'fmul','fneg','fnop','fsqrt','fsub','fsgldiv',
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+ 'fsflmul','ftst',
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+ 'fint','fintrz',
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+ 'ftrapeq','ftrapne','ftrapgt','ftrapngt','ftrapge','ftrapnge',
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+ 'ftraplt','ftrapnlt','ftraple','ftrapgl','ftrapngl','ftrapgle',
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+ 'ftrapngle',
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+ { Useful for assembly langage output }
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+ { Protected instructions }
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+ 'cprestore','cpsave',
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+ { FPU Unit protected instructions }
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+ { and 68030/68851 common MMU instructions }
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+ { (this may include 68040 MMU instructions) }
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+ 'frestore','fsave','pflush','pflusha','pload','pmove','ptest',
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+ { Useful for assembly langage output }
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+ '','','','');
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+
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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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+
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+ gas_reg2str : reg2strtable =
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+ ('', '%d0','%d1','%d2','%d3','%d4','%d5','%d6','%d7',
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+ '%a0','%a1','%a2','%a3','%a4','%a5','%a6','%sp',
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+ '-(%sp)','(%sp)+',
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+ '%ccr','%fp0','%fp1','%fp2','%fp3','%fp4','%fp5',
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+ '%fp6','%fp7','%fpcr','%sr','%ssp','%dfc',
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+ '%sfc','%vbr','%fpsr');
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+
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+
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+ implementation
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+
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+ uses
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+ cutils,systems,
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+ verbose;
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+
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+
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+
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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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+
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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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+ inc(offset,offsetfixup);
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+ offsetfixup:=0;
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+ basestr:=gas_reg2str[base];
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+ indexstr:=gas_reg2str[index];
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+ if assigned(symbol) then
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+ s:=s+symbol.name;
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+
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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=R_NO) and (base=R_NO) and not assigned(symbol) then
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+ s:=s+'0';
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+
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+ if (index<>R_NO) and (base=R_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=R_NO) and (base<>R_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=R_NO) and (base<>R_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=R_NO) and (base<>R_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<>R_NO) and (base<>R_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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+
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+
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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 : tregister;
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+ begin
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+ case o.typ of
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+ top_reg : getopstr:=gas_reg2str[o.reg];
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+ top_ref : getopstr:=getreferencestring(o.ref^);
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+ top_reglist : begin
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+ hs:='';
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+ for i:=R_NO to R_FPSR do
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+ begin
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+ if i in o.registerlist then
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+ hs:=hs+gas_reg2str[i]+'/';
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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 : getopstr:='#'+tostr(o.val);
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+ top_symbol :
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+ { compare with i386, where a symbol is considered }
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+ { a constant. }
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+ begin
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+ if assigned(o.sym) then
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+ hs:='#'+o.sym.name
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+ else
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+ hs:='#';
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+ if o.symofs>0 then
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+ hs:=hs+'+'+tostr(o.symofs)
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+ else
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+ if o.symofs<0 then
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+ hs:=hs+tostr(o.symofs)
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+ else
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+ if not(assigned(o.sym)) then
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+ hs:=hs+'0';
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+ getopstr:=hs;
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+ end;
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+ else internalerror(10001);
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+ end;
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+ end;
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+
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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 : getopstr_jmp:=gas_reg2str[o.reg];
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+ top_ref : getopstr_jmp:=getreferencestring(o.ref^);
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+ top_const : getopstr_jmp:=tostr(o.val);
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+ top_symbol : begin
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+ if assigned(o.sym) then
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+ hs:=o.sym.name
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+ else
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+ hs:='';
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+ if o.symofs>0 then
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+ hs:=hs+'+'+tostr(o.symofs)
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+ else
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+ if o.symofs<0 then
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+ hs:=hs+tostr(o.symofs)
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+ else
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+ if not(assigned(o.sym)) then
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+ hs:=hs+'0';
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+ getopstr_jmp:=hs;
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+ end;
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+ else internalerror(10001);
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+ end;
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+ end;
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+
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+{****************************************************************************
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+ TM68kASMOUTPUT
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+ ****************************************************************************}
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+
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+(*
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+ ait_instruction : begin
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+ { old versions of GAS don't like PEA.L and LEA.L }
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+ if (paicpu(hp)^.opcode 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:=#9+mot_op2str[paicpu(hp)^.opcode]
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+ else
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+ s:=#9+mot_op2str[paicpu(hp)^.opcode]+mit_opsize2str[paicpu(hp)^.opsize];
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+ if paicpu(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 callded if jmp isn't a labeled instruction }
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+ if paicpu(hp)^.opcode in [A_BSR,A_BRA,A_LEA,A_PEA,A_JSR,A_JMP] then
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+ s:=s+#9#9+getopstr_jmp(paicpu(hp)^.oper[0])
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+ else
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+ s:=s+#9+getopstr(paicpu(hp)^.oper[0]);
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+ if paicpu(hp)^.ops>1 then
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+ begin
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+ s:=s+','+getopstr(paicpu(hp)^.oper[1]);
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+ { three operands }
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+ if paicpu(hp)^.ops>2 then
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+ begin
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+ if (paicpu(hp)^.opcode = A_DIVSL) or
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+ (paicpu(hp)^.opcode = A_DIVUL) or
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+ (paicpu(hp)^.opcode = A_MULU) or
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+ (paicpu(hp)^.opcode = A_MULS) or
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+ (paicpu(hp)^.opcode = A_DIVS) or
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+ (paicpu(hp)^.opcode = A_DIVU) then
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+ s:=s+':'+getopstr(paicpu(hp)^.oper[2])
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+ else
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+ s:=s+','+getopstr(paicpu(hp)^.oper[2]);
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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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+
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+ait_labeled_instruction : begin
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+ { labeled operand }
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+ if pai_labeled(hp)^.register = R_NO then
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+ begin
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+ if pai_labeled(hp)^.lab <> nil then
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+ AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^.opcode]+#9+pai_labeled(hp)^.lab^.name)
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+ else
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+ AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^.opcode]+#9+pai_labeled(hp)^.sym^.name);
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+ end
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+ else
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+ { labeled operand with register }
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+ begin
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+ if pai_labeled(hp)^.lab <> nil then
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+ begin
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+ AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^.opcode]+#9+
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+ gas_reg2str[pai_labeled(hp)^.register]+','+pai_labeled(hp)^.lab^.name);
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+ end
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+ else
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+ { a symbol is the value }
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+ begin
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+ AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^.opcode]+#9+
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+ gas_reg2str[pai_labeled(hp)^.register]+','+pai_labeled(hp)^.sym^.name);
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+ end;
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+ end;
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+ end;
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+*)
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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 }
|
|
|
|
+ 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
|
|
|
|
+ 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];
|
|
|
|
+ getopcodestring:=s;
|
|
|
|
+ end;
|
|
|
|
+
|
|
|
|
+ procedure TM68kAssembler. 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
|
|
|
|
+ AsmWrite(s+#9);
|
|
|
|
+ s:=getopstr_jmp(taicpu(hp).oper[0]);
|
|
|
|
+ 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=1) then
|
|
|
|
+ sep:=':'
|
|
|
|
+ else
|
|
|
|
+ sep:=',';
|
|
|
|
+ s:=s+sep+getopstr(taicpu(hp).oper[i])
|
|
|
|
+ end;
|
|
|
|
+ end;
|
|
|
|
+ end;
|
|
|
|
+ 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;
|
|
|
|
+ outputbinary: false;
|
|
|
|
+ allowdirect : true;
|
|
|
|
+ needar : true;
|
|
|
|
+ labelprefix_only_inside_procedure : false;
|
|
|
|
+ labelprefix : '.L';
|
|
|
|
+ comment : '# ';
|
|
|
|
+ secnames : ('',
|
|
|
|
+ '.text','.data','.bss',
|
|
|
|
+ '','','','','','',
|
|
|
|
+ '.stab','.stabstr','COMMON')
|
|
|
|
+ );
|
|
|
|
+
|
|
|
|
+initialization
|
|
|
|
+ RegisterAssembler(as_m68k_as_info,TM68kAssembler);
|
|
|
|
+end.
|
|
|
|
+{
|
|
|
|
+ $Log$
|
|
|
|
+ Revision 1.1 2002-08-13 18:01:52 carl
|
|
|
|
+ * rename swatoperands to swapoperands
|
|
|
|
+ + m68k first compilable version (still needs a lot of testing):
|
|
|
|
+ assembler generator, system information , inline
|
|
|
|
+ assembler reader.
|
|
|
|
+
|
|
|
|
+}
|