fpc/compiler/avr/navrcnv.pas

{
    Copyright (c) 1998-2009 by Florian Klaempfl

    Generate AVR 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 navrcnv;

{$i fpcdefs.inc}

interface

    uses
      node,ncnv,ncgcnv,defcmp;

    type
       tarmtypeconvnode = 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; }
         { 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,globtype,globals,systems,
      symconst,symdef,aasmbase,aasmtai,aasmdata,
      defutil,
      cgbase,cgutils,
      pass_1,pass_2,procinfo,
      ncon,ncal,
      ncgutil,
      cpubase,aasmcpu,
      rgobj,tgobj,cgobj,cgcpu;


    procedure tarmtypeconvnode.second_int_to_bool;
      var
        hregister : tregister;
        href      : treference;
        resflags  : tresflags;
        hlabel,oldTrueLabel,oldFalseLabel : tasmlabel;
        newsize   : tcgsize;
      begin
        {
        oldTrueLabel:=current_procinfo.CurrTrueLabel;
        oldFalseLabel:=current_procinfo.CurrFalseLabel;
        current_asmdata.getjumplabel(current_procinfo.CurrTrueLabel);
        current_asmdata.getjumplabel(current_procinfo.CurrFalseLabel);
        secondpass(left);
        if codegenerror then
         exit;

        { Explicit typecasts from any ordinal type to a boolean type }
        { must not change the ordinal value                          }
        if (nf_explicit in flags) and
           not(left.location.loc in [LOC_FLAGS,LOC_JUMP]) then
          begin
             location_copy(location,left.location);
             newsize:=def_cgsize(resultdef);
             { change of size? change sign only if location is LOC_(C)REGISTER? Then we have to sign/zero-extend }
             if (tcgsize2size[newsize]<>tcgsize2size[left.location.size]) or
                ((newsize<>left.location.size) and (location.loc in [LOC_REGISTER,LOC_CREGISTER])) then
               location_force_reg(current_asmdata.CurrAsmList,location,newsize,true)
             else
               location.size:=newsize;
             current_procinfo.CurrTrueLabel:=oldTrueLabel;
             current_procinfo.CurrFalseLabel:=oldFalseLabel;
             exit;
          end;

        { Load left node into flag F_NE/F_E }
        resflags:=F_NE;
        case left.location.loc of
          LOC_CREFERENCE,
          LOC_REFERENCE :
            begin
              if left.location.size in [OS_64,OS_S64] then
               begin
                 hregister:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
                 cg.a_load_ref_reg(current_asmdata.CurrAsmList,OS_32,OS_32,left.location.reference,hregister);
                 href:=left.location.reference;
                 inc(href.offset,4);
                 tcgarm(cg).cgsetflags:=true;
                 cg.a_op_ref_reg(current_asmdata.CurrAsmList,OP_OR,OS_32,href,hregister);
                 tcgarm(cg).cgsetflags:=false;
               end
              else
               begin
                 location_force_reg(current_asmdata.CurrAsmList,left.location,left.location.size,true);
                 tcgarm(cg).cgsetflags:=true;
                 cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_OR,left.location.size,left.location.register,left.location.register);
                 tcgarm(cg).cgsetflags:=false;
               end;
            end;
          LOC_FLAGS :
            begin
              resflags:=left.location.resflags;
            end;
          LOC_REGISTER,LOC_CREGISTER :
            begin
              if left.location.size in [OS_64,OS_S64] then
               begin
                 hregister:=cg.getintregister(current_asmdata.CurrAsmList,OS_32);
                 cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_32,OS_32,left.location.register64.reglo,hregister);
                 tcgarm(cg).cgsetflags:=true;
                 cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_OR,OS_32,left.location.register64.reghi,hregister);
                 tcgarm(cg).cgsetflags:=false;
               end
              else
               begin
                 tcgarm(cg).cgsetflags:=true;
                 cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_OR,left.location.size,left.location.register,left.location.register);
                 tcgarm(cg).cgsetflags:=false;
               end;
            end;
          LOC_JUMP :
            begin
              hregister:=cg.getintregister(current_asmdata.CurrAsmList,OS_INT);
              current_asmdata.getjumplabel(hlabel);
              cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrTrueLabel);
              cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,1,hregister);
              cg.a_jmp_always(current_asmdata.CurrAsmList,hlabel);
              cg.a_label(current_asmdata.CurrAsmList,current_procinfo.CurrFalseLabel);
              cg.a_load_const_reg(current_asmdata.CurrAsmList,OS_INT,0,hregister);
              cg.a_label(current_asmdata.CurrAsmList,hlabel);
              tcgarm(cg).cgsetflags:=true;
              cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_OR,OS_INT,hregister,hregister);
              tcgarm(cg).cgsetflags:=false;
            end;
          else
            internalerror(200311301);
        end;
        { load flags to register }
        location_reset(location,LOC_REGISTER,def_cgsize(resultdef));
        location.register:=cg.getintregister(current_asmdata.CurrAsmList,location.size);
        cg.g_flags2reg(current_asmdata.CurrAsmList,location.size,resflags,location.register);
        if (is_cbool(resultdef)) then
          cg.a_op_reg_reg(current_asmdata.CurrAsmList,OP_NEG,location.size,location.register,location.register);
        current_procinfo.CurrTrueLabel:=oldTrueLabel;
        current_procinfo.CurrFalseLabel:=oldFalseLabel;
        }
      end;


begin
  ctypeconvnode:=tarmtypeconvnode;
end.