freepascal.compiler/compiler/m68k/aasmcpu.pas

{
    Copyright (c) 1998-2001 by Florian Klaempfl and Pierre Muller

    m68k family assembler instructions

    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 aasmcpu;

{$i fpcdefs.inc}

interface

uses
  cclasses,aasmtai,
  aasmbase,globals,verbose,symtype,
  cpubase,cpuinfo,cgbase,cgutils;


const
  { "mov reg,reg" source operand number }
  O_MOV_SOURCE = 0;
  { "mov reg,reg" source operand number }
  O_MOV_DEST = 1;
type

  taicpu = class(tai_cpu_abstract)
     opsize : topsize;
     constructor op_none(op : tasmop;_size : topsize);

     constructor op_reg(op : tasmop;_size : topsize;_op1 : tregister);
     constructor op_const(op : tasmop;_size : topsize;_op1 : longint);
     constructor op_ref(op : tasmop;_size : topsize;_op1 : treference);

     constructor op_reg_reg(op : tasmop;_size : topsize;_op1,_op2 : tregister);
     constructor op_reg_ref(op : tasmop;_size : topsize;_op1 : tregister;_op2 : treference);
     constructor op_reg_const(op:tasmop; _size: topsize; _op1: tregister; _op2: longint);

     constructor op_const_reg(op : tasmop;_size : topsize;_op1 : longint;_op2 : tregister);
     constructor op_const_const(op : tasmop;_size : topsize;_op1,_op2 : longint);
     constructor op_const_ref(op : tasmop;_size : topsize;_op1 : longint;_op2 : treference);

     constructor op_ref_reg(op : tasmop;_size : topsize;_op1 : treference;_op2 : tregister);
     { this is only allowed if _op1 is an int value (_op1^.isintvalue=true) }
     constructor op_ref_ref(op : tasmop;_size : topsize;_op1,_op2 : treference);

     constructor op_reg_reg_reg(op : tasmop;_size : topsize;_op1,_op2,_op3 : tregister);
     constructor op_const_reg_reg(op : tasmop;_size : topsize;_op1 : longint;_op2 : tregister;_op3 : tregister);
     constructor op_const_ref_reg(op : tasmop;_size : topsize;_op1 : longint;_op2 : treference;_op3 : tregister);
     constructor op_reg_reg_ref(op : tasmop;_size : topsize;_op1,_op2 : tregister; _op3 : treference);
     constructor op_const_reg_ref(op : tasmop;_size : topsize;_op1 : longint;_op2 : tregister;_op3 : treference);

     constructor op_reg_regset(op: tasmop; _size : topsize; _op1: tregister;const _op2: tcpuregisterset);
     constructor op_regset_reg(op: tasmop; _size : topsize;const  _op1: tcpuregisterset; _op2: tregister);

     constructor op_ref_regset(op: tasmop; _size : topsize; _op1: treference;const _op2: tcpuregisterset);
     constructor op_regset_ref(op: tasmop; _size : topsize;const  _op1: tcpuregisterset; _op2: treference);

     { this is for Jmp instructions }
     constructor op_cond_sym(op : tasmop;cond:TAsmCond;_size : topsize;_op1 : tasmsymbol);

     constructor op_sym(op : tasmop;_size : topsize;_op1 : tasmsymbol);
     { for DBxx opcodes }
     constructor op_reg_sym(op: tasmop; _size : topsize; _op1: tregister; _op2 :tasmsymbol);
     constructor op_sym_ofs_reg(op : tasmop;_size : topsize;_op1 : tasmsymbol;_op1ofs:longint;_op2 : tregister);

     constructor op_sym_ofs(op : tasmop;_size : topsize;_op1 : tasmsymbol;_op1ofs:longint);
     constructor op_sym_ofs_ref(op : tasmop;_size : topsize;_op1 : tasmsymbol;_op1ofs:longint;const _op2 : treference);

     function is_same_reg_move(regtype: Tregistertype):boolean;override;
     function spilling_get_operation_type(opnr: longint): topertype;override;

  private
     procedure loadregset(opidx:longint;const s:tcpuregisterset);
     procedure init(_size : topsize); { this need to be called by all constructor }
  end;


  tai_align = class(tai_align_abstract)
        { nothing to add }
  end;

  procedure InitAsm;
  procedure DoneAsm;

    function spilling_create_load(const ref:treference;r:tregister): tai;
    function spilling_create_store(r:tregister; const ref:treference): tai;

  implementation

    uses
      globtype;


{*****************************************************************************
                                 Taicpu Constructors
*****************************************************************************}



    procedure taicpu.loadregset(opidx:longint;const s:tcpuregisterset);
      var
        i : byte;
      begin
        allocate_oper(opidx+1);
        with oper[opidx]^ do
         begin
           if typ<>top_regset then
             clearop(opidx);
           new(regset);
           regset^:=s;
           typ:=top_regset;
           for i:=RS_D0 to RS_D7 do
             begin
               if assigned(add_reg_instruction_hook) and (i in regset^) then
                 add_reg_instruction_hook(self,newreg(R_INTREGISTER,i,R_SUBWHOLE));
             end;
           for i:=RS_A0 to RS_SP do
             begin
               if assigned(add_reg_instruction_hook) and (i in regset^) then
                 add_reg_instruction_hook(self,newreg(R_ADDRESSREGISTER,i,R_SUBWHOLE));
             end;
         end;
      end;


    procedure taicpu.init(_size : topsize);
      begin
         typ:=ait_instruction;
         is_jmp:=false;
         opsize:=_size;
         ops:=0;
      end;


    constructor taicpu.op_none(op : tasmop;_size : topsize);
      begin
         inherited create(op);
         init(_size);
      end;


    constructor taicpu.op_reg(op : tasmop;_size : topsize;_op1 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=1;
         loadreg(0,_op1);
      end;


    constructor taicpu.op_const(op : tasmop;_size : topsize;_op1 : longint);
      begin
         inherited create(op);
         init(_size);
         ops:=1;
         loadconst(0,aword(_op1));
      end;


    constructor taicpu.op_ref(op : tasmop;_size : topsize;_op1 : treference);
      begin
         inherited create(op);
         init(_size);
         ops:=1;
         loadref(0,_op1);
      end;


    constructor taicpu.op_reg_reg(op : tasmop;_size : topsize;_op1,_op2 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadreg(0,_op1);
         loadreg(1,_op2);
      end;


    constructor taicpu.op_reg_const(op:tasmop; _size: topsize; _op1: tregister; _op2: longint);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadreg(0,_op1);
         loadconst(1,aword(_op2));
      end;


    constructor taicpu.op_reg_ref(op : tasmop;_size : topsize;_op1 : tregister;_op2 : treference);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadreg(0,_op1);
         loadref(1,_op2);
      end;


    constructor taicpu.op_const_reg(op : tasmop;_size : topsize;_op1 : longint;_op2 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadconst(0,aword(_op1));
         loadreg(1,_op2);
      end;


    constructor taicpu.op_const_const(op : tasmop;_size : topsize;_op1,_op2 : longint);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadconst(0,aword(_op1));
         loadconst(1,aword(_op2));
      end;


    constructor taicpu.op_const_ref(op : tasmop;_size : topsize;_op1 : longint;_op2 : treference);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadconst(0,aword(_op1));
         loadref(1,_op2);
      end;


    constructor taicpu.op_ref_reg(op : tasmop;_size : topsize;_op1 : treference;_op2 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadref(0,_op1);
         loadreg(1,_op2);
      end;


    constructor taicpu.op_ref_ref(op : tasmop;_size : topsize;_op1,_op2 : treference);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadref(0,_op1);
         loadref(1,_op2);
      end;


    constructor taicpu.op_reg_reg_reg(op : tasmop;_size : topsize;_op1,_op2,_op3 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=3;
         loadreg(0,_op1);
         loadreg(1,_op2);
         loadreg(2,_op3);
      end;

    constructor taicpu.op_const_reg_reg(op : tasmop;_size : topsize;_op1 : longint;_op2 : tregister;_op3 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=3;
         loadconst(0,aword(_op1));
         loadreg(1,_op2);
         loadreg(2,_op3);
      end;

    constructor taicpu.op_reg_reg_ref(op : tasmop;_size : topsize;_op1,_op2 : tregister;_op3 : treference);
      begin
         inherited create(op);
         init(_size);
         ops:=3;
         loadreg(0,_op1);
         loadreg(1,_op2);
         loadref(2,_op3);
      end;


    constructor taicpu.op_const_ref_reg(op : tasmop;_size : topsize;_op1 : longint;_op2 : treference;_op3 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=3;
         loadconst(0,aword(_op1));
         loadref(1,_op2);
         loadreg(2,_op3);
      end;


    constructor taicpu.op_const_reg_ref(op : tasmop;_size : topsize;_op1 : longint;_op2 : tregister;_op3 : treference);
      begin
         inherited create(op);
         init(_size);
         ops:=3;
         loadconst(0,aword(_op1));
         loadreg(1,_op2);
         loadref(2,_op3);
      end;


   constructor taicpu.op_ref_regset(op: tasmop; _size : topsize; _op1: treference;const _op2: tcpuregisterset);
     Begin
        inherited create(op);
        init(_size);
        ops:=2;
        loadref(0,_op1);
        loadregset(1,_op2);
     end;

   constructor taicpu.op_regset_ref(op: tasmop; _size : topsize;const _op1: tcpuregisterset; _op2: treference);
     Begin
        inherited create(op);
        init(_size);
        ops:=2;
        loadregset(0,_op1);
        loadref(1,_op2);
     End;



   constructor taicpu.op_reg_regset(op: tasmop; _size : topsize; _op1: tregister;const _op2: tcpuregisterset);
     Begin
        inherited create(op);
        init(_size);
        ops:=2;
        loadreg(0,_op1);
        loadregset(1,_op2);
     end;


   constructor taicpu.op_regset_reg(op: tasmop; _size : topsize;const _op1: tcpuregisterset; _op2: tregister);
     Begin
        inherited create(op);
        init(_size);
        ops:=2;
        loadregset(0,_op1);
        loadreg(1,_op2);
     End;


    constructor taicpu.op_sym(op : tasmop;_size : topsize;_op1 : tasmsymbol);
      begin
         inherited create(op);
         init(_size);
         ops:=1;
         loadsymbol(0,_op1,0);
      end;


     constructor taicpu.op_reg_sym(op: tasmop; _size : topsize; _op1: tregister; _op2 :tasmsymbol);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadreg(0,_op1);
         loadsymbol(1,_op2,0);
      end;


    constructor taicpu.op_sym_ofs_ref(op : tasmop;_size : topsize;_op1 : tasmsymbol;_op1ofs:longint;const _op2 : treference);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         loadsymbol(0,_op1,_op1ofs);
         loadref(1,_op2);
      end;


    constructor taicpu.op_sym_ofs(op : tasmop;_size : topsize;_op1 : tasmsymbol;_op1ofs:longint);
      begin
         inherited create(op);
         init(_size);
         ops:=1;
         loadsymbol(0,_op1,_op1ofs);
      end;

    constructor taicpu.op_sym_ofs_reg(op : tasmop;_size : topsize;_op1 : tasmsymbol;_op1ofs:longint;_op2 : tregister);
      begin
         inherited create(op);
         init(_size);
         ops:=2;
         if ((op >= A_DBCC) and (op <= A_DBF))
          or ((op >= A_FDBEQ) and (op <= A_FDBNGLE)) then
           begin
             loadreg(0,_op2);
             loadsymbol(1,_op1,_op1ofs);
           end
          else
           begin
             loadsymbol(0,_op1,_op1ofs);
             loadreg(1,_op2);
           end;
      end;


    constructor taicpu.op_cond_sym(op : tasmop;cond:TAsmCond;_size : topsize;_op1 : tasmsymbol);
      begin
         inherited create(op);
         init(_size);
         condition:=cond;
         ops:=1;
         loadsymbol(0,_op1,0);
      end;


    function taicpu.is_same_reg_move(regtype: Tregistertype):boolean;
      begin
        result:=(((opcode=A_MOVE) or (opcode=A_EXG)) and
                 (regtype = R_INTREGISTER) and
                 (ops=2) and
                 (oper[0]^.typ=top_reg) and
                 (oper[1]^.typ=top_reg) and
                 (oper[0]^.reg=oper[1]^.reg)
                ) or
                ((opcode=A_FMOVE) and
                 (regtype = R_FPUREGISTER) and
                 (ops=2) and
                 (oper[0]^.typ=top_reg) and
                 (oper[1]^.typ=top_reg) and
                 (oper[0]^.reg=oper[1]^.reg)
                );
      end;


    function taicpu.spilling_get_operation_type(opnr: longint): topertype;
      begin
        case opcode of
          A_MOVE, A_MOVEQ, A_ADD, A_ADDQ, A_SUB, A_SUBQ:
            if opnr=0 then begin
//              writeln('move/etc write');
              result:=operand_write;
            end else begin
//              writeln('move/etc read');
              result:=operand_read;
            end;
        else
          writeln('other opcode: ',dword(opcode),' (faked value returned)',opnr);
	  result:=operand_write;
        end;
	// fake
                
//        internalerror(200404091);
      end;

    function spilling_create_load(const ref:treference;r:tregister): tai;
      begin
//        writeln('spilling_create_load');
        case getregtype(r) of
          R_INTREGISTER :
            result:=taicpu.op_ref_reg(A_MOVE,S_L,ref,r);
          R_FPUREGISTER : begin end;
        end;
{
        case getregtype(r) of
          R_INTREGISTER :
            result:=taicpu.op_ref_reg(A_LD,ref,r);
          R_FPUREGISTER :
            begin
              case getsubreg(r) of
                R_SUBFS :
                  result:=taicpu.op_ref_reg(A_LDF,ref,r);
                R_SUBFD :
                  result:=taicpu.op_ref_reg(A_LDD,ref,r);
                else
                  internalerror(200401042);
              end;
            end
          else
            internalerror(200401041);
        end;
        }
      end;


    function spilling_create_store(r:tregister; const ref:treference): tai;
      begin
//        writeln('spilling_create_store');
	case getregtype(r) of
	  R_INTREGISTER :
	    result:=taicpu.op_reg_ref(A_MOVE,S_L,r,ref);
	  R_FPUREGISTER :
	    begin
//	    result:=taicpu.op_reg_ref(A_FMOVE,R_SUBFS,r,ref);
	    end;
	end;
        {case getregtype(r) of
          R_INTREGISTER :
            result:=taicpu.op_reg_ref(A_ST,r,ref);
          R_FPUREGISTER :
            begin
              case getsubreg(r) of
                R_SUBFS :
                  result:=taicpu.op_reg_ref(A_STF,r,ref);
                R_SUBFD :
                  result:=taicpu.op_reg_ref(A_STD,r,ref);
                else
                  internalerror(200401042);
              end;
            end
          else
            internalerror(200401041);
        end;}
      end;

    procedure InitAsm;
      begin
      end;


    procedure DoneAsm;
      begin
      end;

end.