fpc/compiler/z80/nz80cal.pas

{
    Copyright (c) 1998-2002 by Florian Klaempfl

    Generate Z80 assembler for in call 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 nz80cal;

{$i fpcdefs.inc}

interface

    uses
      ncgcal;

    type
       tz80callnode = class(tcgcallnode)
       protected
          procedure pop_parasize(pop_size:longint);override;
       end;


implementation

    uses
      cpubase,
      aasmdata,aasmcpu,
      ncal,
      cgobj;


{*****************************************************************************
                             TZ80CALLNODE
*****************************************************************************}


    procedure tz80callnode.pop_parasize(pop_size:longint);
      begin
        if pop_size>=2 then
          begin
            cg.getcpuregister(current_asmdata.CurrAsmList,NR_A);
            while pop_size>=2 do
              begin
                current_asmdata.CurrAsmList.Concat(taicpu.op_reg(A_POP,NR_AF));
                dec(pop_size,2);
              end;
            cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_A);
          end;
        if pop_size=1 then
          current_asmdata.CurrAsmList.Concat(taicpu.op_reg(A_INC,NR_SP));
      end;


begin
   ccallnode:=tz80callnode;
end.