freepascal.compiler/compiler/mos6502/nmos6502inl.pas

{
    Copyright (c) 2020 by Sven Barth

    Generates MOS Technology 6502 inline 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 nmos6502inl;

{$i fpcdefs.inc}

  interface

    uses
      node,ninl,ncginl, aasmbase;

    type
      TMOS6502InlineNode = class(tcginlinenode)
//        function pass_typecheck_cpu:tnode;override;
//        function first_cpu : tnode;override;
//        procedure pass_generate_code_cpu;override;
      end;

  implementation

    uses
      compinnr,
      aasmdata,
      aasmcpu,
      symdef,
      defutil,
      hlcgobj,
      pass_2,
      ncal,
      cgbase, cgobj, cgutils,
      cpubase;


//    function TMOS6502InlineNode.pass_typecheck_cpu : tnode;
//      begin
//        Result:=nil;
//        case inlinenumber of
//          in_z80_inport:
//            begin
//              CheckParameters(1);
//              resultdef:=u8inttype;
//            end;
//          in_z80_outport:
//            begin
//              CheckParameters(2);
//              resultdef:=voidtype;
//            end;
//          else
//            Result:=inherited pass_typecheck_cpu;
//        end;
//      end;


//    function TMOS6502InlineNode.first_cpu : tnode;
//      begin
//        Result:=nil;
//        case inlinenumber of
//          in_z80_inport:
//            expectloc:=LOC_REGISTER;
//          in_z80_outport:
//            expectloc:=LOC_VOID;
//          else
//            Result:=inherited first_cpu;
//        end;
//      end;


//    procedure TMOS6502InlineNode.pass_generate_code_cpu;
//
//      procedure inport;
//        var
//          portnumber : tnode;
//          dreg : tregister;
//          ref : treference;
//        begin
//          portnumber:=left;
//          secondpass(portnumber);
//          if (portnumber.location.loc=LOC_CONSTANT) and
//              (portnumber.location.value>=0) and
//              (portnumber.location.value<=$ff) then
//            begin
//              { data needs to be put into A }
//              dreg:=NR_A;
//              reference_reset_base(ref,NR_NO,portnumber.location.value,ctempposinvalid,1,[]);
//              current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_IN,dreg,ref));
//            end
//          else
//            begin
//              { data can be put anywhere, but port number must be in C }
//              hlcg.getcpuregister(current_asmdata.CurrAsmList,NR_C);
//              dreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_8);
//              hlcg.a_load_loc_reg(current_asmdata.CurrAsmList,portnumber.resultdef,u8inttype,portnumber.location,NR_C);
//              reference_reset_base(ref,NR_C,0,ctempposinvalid,1,[]);
//              current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_IN,dreg,ref));
//              hlcg.ungetcpuregister(current_asmdata.CurrAsmList,NR_C);
//            end;
//            location_reset(location,LOC_REGISTER,def_cgsize(resultdef));
//            location.register:=dreg;
//        end;
//
//      procedure outport;
//        var
//          portnumber,
//          portdata : tnode;
//          dreg : tregister;
//          ref : treference;
//        begin
//          portnumber:=tcallparanode(tcallparanode(left).right).left;
//          portdata:=tcallparanode(left).left;
//          secondpass(portdata);
//          secondpass(portnumber);
//          if (portnumber.location.loc=LOC_CONSTANT) and
//              (portnumber.location.value>=0) and
//              (portnumber.location.value<=$ff) then
//            begin
//              { data needs to reside in A }
//              dreg:=NR_A;
//              hlcg.a_load_loc_reg(current_asmdata.CurrAsmList,portdata.resultdef,u8inttype,portdata.location,dreg);
//              hlcg.getcpuregister(current_asmdata.CurrAsmList,dreg);
//              reference_reset_base(ref,NR_NO,portnumber.location.value,ctempposinvalid,1,[]);
//              current_asmdata.currasmlist.concat(taicpu.op_ref_reg(A_OUT,ref,dreg));
//              hlcg.ungetcpuregister(current_asmdata.CurrAsmList,dreg);
//            end
//          else
//            begin
//              { data can reside anywhere, but port number must be in C }
//              hlcg.getcpuregister(current_asmdata.CurrAsmList,NR_C);
//              dreg:=cg.getintregister(current_asmdata.CurrAsmList,OS_8);
//              hlcg.a_load_loc_reg(current_asmdata.CurrAsmList,portdata.resultdef,u8inttype,portdata.location,dreg);
//              hlcg.a_load_loc_reg(current_asmdata.CurrAsmList,portnumber.resultdef,u8inttype,portnumber.location,NR_C);
//              reference_reset_base(ref,NR_C,0,ctempposinvalid,1,[]);
//              current_asmdata.CurrAsmList.concat(taicpu.op_ref_reg(A_OUT,ref,dreg));
//              hlcg.ungetcpuregister(current_asmdata.CurrAsmList,NR_C);
//            end;
//        end;
//
//      begin
//        case inlinenumber of
//          in_z80_inport:
//            inport;
//          in_z80_outport:
//            outport;
//          else
//            inherited pass_generate_code_cpu;
//        end;
//      end;


begin
  cinlinenode:=TMOS6502InlineNode;
end.