freepascal.compiler/compiler/sparc/ncpucnv.pas

{    $Id$
    Copyright (c) 1998-2002 by Florian Klaempfl

    Generate SPARC assembler for type converting nodes

    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 ncpucnv;

{$i fpcdefs.inc}

interface

    uses
      node,ncnv,ncgcnv,defcmp;

    type
       TSparcTypeConvNode = class(TCgTypeConvNode)
         protected
         { procedure second_int_to_int;override; }
         { procedure second_string_to_string;override; }
         { procedure second_cstring_to_pchar;override; }
         { procedure second_string_to_chararray;override; }
         { procedure second_array_to_pointer;override; }
          function first_int_to_real: tnode; override;
         { procedure second_pointer_to_array;override; }
         { procedure second_chararray_to_string;override; }
         { procedure second_char_to_string;override; }
          procedure second_int_to_real;override;
          procedure second_real_to_real;override;
         { procedure second_cord_to_pointer;override; }
         { procedure second_proc_to_procvar;override; }
         { procedure second_bool_to_int;override; }
          procedure second_int_to_bool;override;
         { procedure second_load_smallset;override;  }
         { procedure second_ansistring_to_pchar;override; }
         { procedure second_pchar_to_string;override; }
         { procedure second_class_to_intf;override; }
         { procedure second_char_to_char;override; }
       end;

implementation

   uses
      verbose,globals,systems,
      symconst,symdef,aasmbase,aasmtai,
      defutil,
      cgbase,pass_1,pass_2,
      ncon,ncal,
      ncgutil,
      cpubase,aasmcpu,
      tgobj,cgobj;


{*****************************************************************************
                             FirstTypeConv
*****************************************************************************}

    function TSparctypeconvnode.first_int_to_real: tnode;
      var
        fname: string[19];
      begin
        { converting a 64bit integer to a float requires a helper }
        if is_64bitint(left.resulttype.def) then
          begin
            if is_signed(left.resulttype.def) then
              fname := 'fpc_int64_to_double'
            else
              fname := 'fpc_qword_to_double';
            result := ccallnode.createintern(fname,ccallparanode.create(
              left,nil));
            left:=nil;
            firstpass(result);
            exit;
          end
        else
          { other integers are supposed to be 32 bit }
          begin
            if is_signed(left.resulttype.def) then
              inserttypeconv(left,s32inttype)
            else
              inserttypeconv(left,u32inttype);
            firstpass(left);
          end;
        result := nil;
        if registersfpu<1 then
          registersfpu:=1;
        expectloc:=LOC_FPUREGISTER;
      end;


{*****************************************************************************
                             SecondTypeConv
*****************************************************************************}

    procedure TSparctypeconvnode.second_int_to_real;
      begin
        location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
        location_force_mem(exprasmlist,left.location);
        location.register:=cg.getfpuregister(exprasmlist,location.size);
        { Load memory in fpu register }
        cg.a_loadfpu_ref_reg(exprasmlist,location.size,left.location.reference,location.register);
        tg.ungetiftemp(exprasmlist,left.location.reference);
{$warning TODO Handle also double}
        { Convert value in fpu register from integer to float }
        exprasmlist.concat(taicpu.op_reg_reg(A_FiTOs,location.register,location.register));
      end;


    procedure TSparctypeconvnode.second_real_to_real;
      const
        conv_op : array[tfloattype,tfloattype] of tasmop = (
          {    from:   s32     s64     s80     c64     cur    f128 }
          { s32 }  ( A_FMOVS,A_FDTOS,A_NONE, A_NONE, A_NONE, A_NONE ),
          { s64 }  ( A_FSTOD,A_FMOVD,A_NONE, A_NONE, A_NONE, A_NONE ),
          { s80 }  ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE ),
          { c64 }  ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE ),
          { cur }  ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE ),
          { f128 } ( A_NONE, A_NONE, A_NONE, A_NONE, A_NONE, A_NONE )
        );
      var
        op : tasmop;
      begin
        location_reset(location,LOC_FPUREGISTER,def_cgsize(resulttype.def));
        location_force_fpureg(exprasmlist,left.location,false);
        { Convert value in fpu register from integer to float }
        op:=conv_op[tfloatdef(resulttype.def).typ,tfloatdef(left.resulttype.def).typ];
        if op=A_NONE then
          internalerror(200401121);
        location_release(exprasmlist,left.location);
        location.register:=cg.getfpuregister(exprasmlist,location.size);
        exprasmlist.concat(taicpu.op_reg_reg(A_FsTOd,left.location.register,location.register));
      end;


    procedure TSparctypeconvnode.second_int_to_bool;
      var
        hreg1,hreg2 : tregister;
        resflags : tresflags;
        opsize   : tcgsize;
        hlabel,oldtruelabel,oldfalselabel : tasmlabel;
      begin
        oldtruelabel:=truelabel;
        oldfalselabel:=falselabel;
        objectlibrary.getlabel(truelabel);
        objectlibrary.getlabel(falselabel);
        secondpass(left);
        if codegenerror then
         exit;
        { byte(boolean) or word(wordbool) or longint(longbool) must }
        { be accepted for var parameters                            }
        if (nf_explicit in flags)and
           (left.resulttype.def.size=resulttype.def.size)and
           (left.location.loc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CREGISTER]) then
          begin
            location_copy(location,left.location);
            truelabel:=oldtruelabel;
            falselabel:=oldfalselabel;
            exit;
          end;
        location_reset(location,LOC_REGISTER,def_cgsize(left.resulttype.def));
        opsize := def_cgsize(left.resulttype.def);
        case left.location.loc of
          LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER:
            begin
              if left.location.loc in [LOC_CREFERENCE,LOC_REFERENCE] then
                begin
                  reference_release(exprasmlist,left.location.reference);
                  hreg2:=cg.GetIntRegister(exprasmlist,opsize);
                  cg.a_load_ref_reg(exprasmlist,OpSize,OpSize,left.location.reference,hreg2);
                end
              else
                hreg2 := left.location.register;
                hreg1 := cg.GetIntRegister(exprasmlist,opsize);
                exprasmlist.concat(taicpu.op_reg_const_reg(A_SUB,hreg1,1,hreg2));
                exprasmlist.concat(taicpu.op_reg_reg_reg(A_SUB,hreg1,hreg1,hreg2));
                cg.UnGetRegister(exprasmlist,hreg2);
            end;
          LOC_FLAGS :
            begin
              hreg1:=cg.GetIntRegister(exprasmlist,location.size);
              resflags:=left.location.resflags;
              cg.g_flags2reg(exprasmlist,location.size,resflags,hreg1);
            end;
          LOC_JUMP :
            begin
              hreg1:=cg.getintregister(exprasmlist,OS_INT);
              objectlibrary.getlabel(hlabel);
              cg.a_label(exprasmlist,truelabel);
              cg.a_load_const_reg(exprasmlist,OS_INT,1,hreg1);
              cg.a_jmp_always(exprasmlist,hlabel);
              cg.a_label(exprasmlist,falselabel);
              cg.a_load_const_reg(exprasmlist,OS_INT,0,hreg1);
              cg.a_label(exprasmlist,hlabel);
            end;
          else
            internalerror(10062);
        end;
        with Location do
          begin
            location.register := hreg1;
            if Size in [OS_64, OS_S64]
            then
              RegisterHigh:=Tregister(LongInt(hReg1)+1);{Alrady allocated OS_64}
          end;
        truelabel:=oldtruelabel;
        falselabel:=oldfalselabel;
      end;


begin
   ctypeconvnode:=TSparctypeconvnode;
end.
{
  $Log$
  Revision 1.26  2004-06-20 08:55:32  florian
    * logs truncated

  Revision 1.25  2004/06/16 20:07:10  florian
    * dwarf branch merged

  Revision 1.24.2.1  2004/05/31 16:39:42  peter
    * add ungetiftemp in a few locations

  Revision 1.24  2004/03/15 14:37:06  mazen
  + support for LongBool(Int64) type cast

  Revision 1.23  2004/02/03 22:32:54  peter
    * renamed xNNbittype to xNNinttype
    * renamed registers32 to registersint
    * replace some s32bit,u32bit with torddef([su]inttype).def.typ

  Revision 1.22  2004/01/12 22:11:39  peter
    * use localalign info for alignment for locals and temps
    * sparc fpu flags branching added
    * moved powerpc copy_valye_openarray to generic

}