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`include "aDefinitions.v"

/**********************************************************************************

Theia, Ray Cast Programable graphic Processing Unit.

Copyright (C) 2012  Diego Valverde (diego.valverde.g@gmail.com)

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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

***********************************************************************************/

module SQRT_STATION

(

   input wire Clock,

   input wire Reset,

   input wire [`MOD_ISSUE_PACKET_SIZE-1:0]                   iIssueBus,

   input wire [`MOD_COMMIT_PACKET_SIZE-1:0]                  iCommitBus,

        input wire [3:0]                                          iId,

        output wire [`COMMIT_PACKET_SIZE-1:0]                     oCommitData,

        output wire                                               oCommitResquest,

        input wire                                                iCommitGranted,

        output wire                                               oBusy

);

wire                           wExeDone;

wire [2:0]                     wExeDoneTmp;

wire                           wRS1_2_ADD_Trigger;

wire [`DATA_ROW_WIDTH-1:0]     wRS1_OperandA;

wire [`DATA_ROW_WIDTH-1:0]     wRS1_OperandB;

wire [`WIDTH-1:0]              wResult;

ReservationStation_1Cycle RS

(

        .Clock(              Clock                           ),

        .Reset(              Reset                           ),

        .iIssueBus(          iIssueBus                       ),

        .iCommitBus(         iCommitBus                      ),

        .iMyId(              iId                             ),

        .iExecutionDone(     wExeDone                        ),

        .iResult(           {wResult,wResult,wResult}        ),

        .iCommitGranted(     iCommitGranted                  ),

        .oSource1(          wRS1_OperandA                   ),

        .oSource0(          wRS1_OperandB                   ),

        .oBusy(              oBusy                           ),

        .oTrigger(           wRS1_2_ADD_Trigger              ),

        .oCommitRequest(     oCommitResquest                 ),

        .oId(              oCommitData[`COMMIT_RSID_RNG]                                ),

        .oWE(              oCommitData[`COMMIT_WE_RNG]                                  ),

        .oDestination(     oCommitData[`COMMIT_DST_RNG]                               ),

        .oResult(          {oCommitData[`X_RNG],oCommitData[`Y_RNG],oCommitData[`Z_RNG]})

);

FixedPointSquareRoot SQRT

(

        .Clock(     Clock                   ),

        .Reset(     Reset                   ),

        .Operand(   wRS1_OperandA[`X_RNG]   ),

        .iInputReady( wRS1_2_ADD_Trigger    ),

        .OutputReady(wExeDone               ),

        .Result(    wResult         )

);

endmodule