freepascal.compiler/compiler/arm/aasmcpu.pas

{
    $Id$
    Copyright (c) 2003 by Florian Klaempfl

    Contains the assembler object for the ARM

    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,
  cpubase,cpuinfo,cginfo;

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

    type
      taicpu = class(taicpu_abstract)
         oppostfix : TOpPostfix;
         roundingmode : troundingmode;
         procedure loadshifterop(opidx:longint;const so:tshifterop);
         procedure loadregset(opidx:longint;const s:tsuperregisterset);
         constructor op_none(op : tasmop);

         constructor op_reg(op : tasmop;_op1 : tregister);
         constructor op_const(op : tasmop;_op1 : longint);

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

         constructor op_ref_regset(op:tasmop; _op1: treference; _op2: tsuperregisterset);

         constructor op_reg_reg_reg(op : tasmop;_op1,_op2,_op3 : tregister);
         constructor op_reg_reg_const(op : tasmop;_op1,_op2 : tregister; _op3: Longint);
         constructor op_reg_reg_sym_ofs(op : tasmop;_op1,_op2 : tregister; _op3: tasmsymbol;_op3ofs: longint);
         constructor op_reg_reg_ref(op : tasmop;_op1,_op2 : tregister; const _op3: treference);
         constructor op_reg_reg_shifterop(op : tasmop;_op1,_op2 : tregister;_op3 : tshifterop);

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

         constructor op_sym(op : tasmop;_op1 : tasmsymbol);
         constructor op_sym_ofs(op : tasmop;_op1 : tasmsymbol;_op1ofs:longint);
         constructor op_reg_sym_ofs(op : tasmop;_op1 : tregister;_op2:tasmsymbol;_op2ofs : longint);
         constructor op_sym_ofs_ref(op : tasmop;_op1 : tasmsymbol;_op1ofs:longint;const _op2 : treference);

         function is_nop: boolean; override;
         function is_move:boolean; override;

         { register spilling code }
         function spilling_decode_loadstore(op: tasmop; var counterpart: tasmop; var wasload: boolean): boolean;override;
         function spilling_create_loadstore(op: tasmop; r:tregister; const ref:treference): tai;override;
         function spilling_create_load(const ref:treference;r:tregister): tai;override;
         function spilling_create_store(r:tregister; const ref:treference): tai;override;

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

    function setoppostfix(i : taicpu;pf : toppostfix) : taicpu;
    function setroundingmode(i : taicpu;rm : troundingmode) : taicpu;
    function setcondition(i : taicpu;c : tasmcond) : taicpu;

    procedure InitAsm;
    procedure DoneAsm;


implementation

  uses
    cutils,rgobj;


    procedure taicpu.loadshifterop(opidx:longint;const so:tshifterop);
      begin
        if opidx>=ops then
         ops:=opidx+1;
        with oper[opidx] do
          begin
            if typ<>top_shifterop then
              begin
                clearop(opidx);
                new(shifterop);
              end;
            shifterop^:=so;
            typ:=top_shifterop;
          end;
      end;


    procedure taicpu.loadregset(opidx:longint;const s:tsuperregisterset);
      begin
        if opidx>=ops then
         ops:=opidx+1;
        with oper[opidx] do
         begin
           if typ<>top_regset then
             clearop(opidx);
           regset:=s;
           typ:=top_regset;
         end;
      end;


{*****************************************************************************
                                 taicpu Constructors
*****************************************************************************}

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


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


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


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


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


    constructor taicpu.op_ref_regset(op:tasmop; _op1: treference; _op2: tsuperregisterset);
      begin
         inherited create(op);
         ops:=2;
         loadref(0,_op1);
         loadregset(1,_op2);
      end;


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


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


     constructor taicpu.op_reg_reg_const(op : tasmop;_op1,_op2 : tregister; _op3: Longint);
       begin
         inherited create(op);
         ops:=3;
         loadreg(0,_op1);
         loadreg(1,_op2);
         loadconst(2,aword(_op3));
      end;


     constructor taicpu.op_reg_reg_sym_ofs(op : tasmop;_op1,_op2 : tregister; _op3: tasmsymbol;_op3ofs: longint);
       begin
         inherited create(op);
         ops:=3;
         loadreg(0,_op1);
         loadreg(1,_op2);
         loadsymbol(0,_op3,_op3ofs);
      end;


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


     constructor taicpu.op_reg_reg_shifterop(op : tasmop;_op1,_op2 : tregister;_op3 : tshifterop);
      begin
         inherited create(op);
         ops:=3;
         loadreg(0,_op1);
         loadreg(1,_op2);
         loadshifterop(2,_op3);
      end;


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


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


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


     constructor taicpu.op_reg_sym_ofs(op : tasmop;_op1 : tregister;_op2:tasmsymbol;_op2ofs : longint);
      begin
         inherited create(op);
         ops:=2;
         loadreg(0,_op1);
         loadsymbol(1,_op2,_op2ofs);
      end;


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


{ ****************************** newra stuff *************************** }

    function taicpu.is_nop: boolean;
      begin
        { we don't insert any more nops than necessary }
        is_nop := false;
      end;


    function taicpu.is_move:boolean;
      begin
        is_move := opcode=A_MOV;
      end;


    function taicpu.spilling_decode_loadstore(op: tasmop; var counterpart: tasmop; var wasload: boolean): boolean;
      begin
        result := true;
        wasload := true;
        case op of
          A_LDR:
            begin
              counterpart := A_STR;
            end;
          A_LDM:
            internalerror(2003070602);
          else
            result := false;
        end;
      end;


    function taicpu.spilling_create_loadstore(op: tasmop; r:tregister; const ref:treference): tai;
      begin
        result:=taicpu.op_reg_ref(opcode,r,ref);
      end;


    function taicpu.spilling_create_load(const ref:treference;r:tregister): tai;
      begin
        result:=taicpu.op_reg_ref(A_LDR,r,ref);
      end;


    function taicpu.spilling_create_store(r:tregister; const ref:treference): tai;
      begin
        result:=taicpu.op_reg_ref(A_STR,r,ref);
      end;


    procedure InitAsm;
      begin
      end;


    procedure DoneAsm;
      begin
      end;


    function setoppostfix(i : taicpu;pf : toppostfix) : taicpu;
      begin
        i.oppostfix:=pf;
        result:=i;
      end;


    function setroundingmode(i : taicpu;rm : troundingmode) : taicpu;
      begin
        i.roundingmode:=rm;
        result:=i;
      end;


    function setcondition(i : taicpu;c : tasmcond) : taicpu;
      begin
        i.condition:=c;
        result:=i;
      end;


end.
{
  $Log$
  Revision 1.12  2003-09-11 11:54:59  florian
    * improved arm code generation
    * move some protected and private field around
    * the temp. register for register parameters/arguments are now released
      before the move to the parameter register is done. This improves
      the code in a lot of cases.

  Revision 1.11  2003/09/06 11:21:49  florian
    * fixed stm and ldm to be usable with preindex operand

  Revision 1.10  2003/09/04 21:07:03  florian
    * ARM compiler compiles again

  Revision 1.9  2003/09/04 00:15:29  florian
    * first bunch of adaptions of arm compiler for new register type

  Revision 1.8  2003/09/03 11:18:37  florian
    * fixed arm concatcopy
    + arm support in the common compiler sources added
    * moved some generic cg code around
    + tfputype added
    * ...

  Revision 1.7  2003/08/29 21:36:28  florian
    * fixed procedure entry/exit code
    * started to fix reference handling

  Revision 1.6  2003/08/28 00:05:29  florian
    * today's arm patches

  Revision 1.5  2003/08/27 00:27:56  florian
    + same procedure as very day: today's work on arm

  Revision 1.4  2003/08/25 23:20:38  florian
    + started to implement FPU support for the ARM
    * fixed a lot of other things

  Revision 1.3  2003/08/24 12:27:26  florian
    * continued to work on the arm port

  Revision 1.2  2003/08/20 15:50:12  florian
    * more arm stuff

  Revision 1.1  2003/08/16 13:23:01  florian
    * several arm related stuff fixed
}