mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 05:11:34 +01:00
238964e443
- fixes in asmreader, basic stuff works again, the rest is untested - removed lot of unnecessary ungetcpuregister()s - various other fixes i forgot + basic amigaos syscalls support. still lacks explicit funcretloc git-svn-id: trunk@1943 -
358 lines
12 KiB
ObjectPascal
358 lines
12 KiB
ObjectPascal
{
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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_op2str:op2strtable=
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{ warning: CPU32 opcodes are not fully compatible with the MC68020. }
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{ 68000 only opcodes }
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('abcd',
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'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','fdbnge',
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'fdblt','fdbnlt','fdble','fdbgl','fdbngl','fdbgle','fdbngle',
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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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'ftrapeq','ftrapne','ftrapgt','ftrapngt','ftrapge','ftrapnge',
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'ftraplt','ftrapnlt','ftraple','ftrapgl','ftrapngl','ftrapgle','ftrapngle',
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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 language output }
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'label','none','db','s','b','fb');
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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 : treg2strtable =
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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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implementation
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uses
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cutils,systems,
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cgbase,cgutils,
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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: begin
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getopstr:=gas_regname(o.reg);
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// writeln('top_reg:',getopstr,'!');
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end;
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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_regset:
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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=2) then
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begin
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sep:=':'
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end 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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flags : [af_allowdirect,af_needar,af_smartlink_sections];
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labelprefix : '.L';
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comment : '# ';
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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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