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// ============================================================================

//        __

//   \\__/ o\    (C) 2013  Robert Finch, Stratford

//    \  __ /    All rights reserved.

//     \/_//     robfinch<remove>@opencores.org

//       ||

//

// This source file is free software: you can redistribute it and/or modify 

// it under the terms of the GNU Lesser General Public License as published 

// by the Free Software Foundation, either version 3 of the License, or     

// (at your option) any later version.                                      

//                                                                          

// This source file 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, see <http://www.gnu.org/licenses/>.    

//                                                   

// Extra state required for some datapath operations.                       

// ============================================================================

//

CALC:

        begin

                state <= IFETCH;

                res <= calc_res;

                wadr <= radr;                   // These two lines for the shift/inc/dec ops

                store_what <= `STW_CALC;

                case(ir[7:0])

                `ASL_ZPX,`ASL_ABS,`ASL_ABSX,

                `ROL_ZPX,`ROL_ABS,`ROL_ABSX,

                `LSR_ZPX,`LSR_ABS,`LSR_ABSX,

                `ROR_ZPX,`ROR_ABS,`ROR_ABSX,

                `INC_ZPX,`INC_ABS,`INC_ABSX,

                `DEC_ZPX,`DEC_ABS,`DEC_ABSX:

                        state <= STORE1;

                endcase

        end