Subversion Repositories theia_gpu

        output wire [2:0]                                         oScale,

(

 .clk(   Clock          ),

 .reset( Reset          ),

 .din(   {wID,wWE,wDestination,iResult}     ),

 .wr_en( iExecutionDone ),

 .rd_en( iCommitGranted ),

 .dout(  {oId,oWE,oDestination,oResult}        ),

 .full(  wCommitFifoFull          )

);

/*

FFD_POSEDGE_SYNCRONOUS_RESET # ( 1 ) FFD_Trigger

(       Clock, Reset, 1'b1 , wLatchRequest, wTrigger );

*/

endmodule

module ReservationStation_EX

(

        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]                                          iMyId,

        input wire                                                iExecutionDone,

        input wire                                                iCommitGranted,

        input wire [`DATA_ROW_WIDTH-1:0]                          iResult,

        output wire [`DATA_ROW_WIDTH-1:0]                         oSource1,

        output wire [`DATA_ROW_WIDTH-1:0]                         oSource0,

        output wire [2:0]                                         oScale,

        output wire [`DATA_ADDRESS_WIDTH-1:0]                     oDestination,

        output wire [`DATA_ROW_WIDTH-1:0]                         oResult,

        output wire [2:0]                                         oWE,

        output wire [3:0]                                         oId,

        output wire                                               oBusy,

        output wire                                               oTrigger,

        output wire                                               oCommitRequest,

        output wire  [`DATA_ROW_WIDTH-1:0]                        oSrc0Latched,oSrc1Latched

);

wire                                wStall;

wire                                wLatchRequest;

wire [3:0]                          wSource1_RS;

wire [3:0]                          wSource0_RS;

//wire [3:0]                          wMyId;

wire                                wTrigger;

//wire                                wFIFO_Pop;

wire [`MOD_ISSUE_PACKET_SIZE-1:0]   wIssue_Latched;

wire [`DATA_ADDRESS_WIDTH-1:0]      wDestination;

wire [3:0]                          wID;

wire [2:0]                          wWE;

wire                                wCommitFifoFull;

wire [`ISSUE_SRCTAG_SIZE-1:0] wTag0,wTag1;

assign oScale = wScale;

//assign wFIFO_Pop = iExecutionDone;

assign oCommitRequest = iExecutionDone;

assign wLatchRequest = ( iIssueBus[`MOD_ISSUE_RSID_RNG] == iMyId) ? 1'b1 : 1'b0;

//If there are no dependencies then just trigger execution

//assign oTrigger = (wTrigger /*&& (iIssueBus[`ISSUE_SRC0RS_RNG] == 0) && (iIssueBus[`ISSUE_SRC1RS_RNG] == 0)*/ ) ? 1'b1 : 0;

wire wTrigger_Pre,wTrigger_Delay,DependencyResolved_Delay;

FFD_POSEDGE_SYNCRONOUS_RESET # ( 1 ) ISSUE_FFDXXX

(       Clock, Reset, 1'b1 , wTrigger_Pre, wTrigger_Delay );

FFD_POSEDGE_SYNCRONOUS_RESET # ( 1 ) ISSUE_FFDYYY

(       Clock, Reset, 1'b1 , DependencyResolved, DependencyResolved_Delay );

assign wTrigger_Pre = ((wLatchRequest & ~wStall)  | DependencyResolved);//( (wLatchRequest | wLatchData0FromCommitBus | wLatchData1FromCommitBus) & ~wStall);

//////////////HERE!!!!!!!!!!!!!!!!!!!!!

//assign oTrigger = wTrigger_Pre;//(DependencyResolved) ? wTrigger_Pre : wTrigger_Delay;

assign oTrigger = (DependencyResolved) ? wTrigger_Pre : (wTrigger_Delay & ~DependencyResolved_Delay);

//////////////HERE!!!!!!!!!!!!!!!!!!!!!

//assign wStall = (/*wLatchRequest*/(wBusy||wLatchRequest) && (iIssueBus[`MOD_ISSUE_SRC1RS_RNG] != 0 || iIssueBus[`MOD_ISSUE_SRC0RS_RNG] != 0)) ? 1'b1 : 1'b0;

///assign wStall = ( (wLatchRequest && (iIssueBus[`MOD_ISSUE_SRC1RS_RNG] != 0 || iIssueBus[`MOD_ISSUE_SRC0RS_RNG] != 0)) ||

                  //((wBusy ) && (wSource1_RS != 0 || wSource0_RS != 0) ) ) ? 1'b1 : 1'b0;

wire DependencyDetected,DependencyResolved, wStall_Pre;

assign DependencyDetected = (wLatchRequest && (iIssueBus[`MOD_ISSUE_SRC1RS_RNG] != 0 || iIssueBus[`MOD_ISSUE_SRC0RS_RNG] != 0));

assign DependencyResolved = ( wLatchData0FromCommitBus ||  wLatchData1FromCommitBus );

UPCOUNTER_POSEDGE # ( 1 ) STALL

(

        .Clock(    Clock                                      ),

        .Reset(    Reset                                      ),

        .Enable(   DependencyDetected |  DependencyResolved   ),

        .Initial(  1'b0                                       ),

        .Q(        wStall_Pre                                 )

);

assign wStall = ( (wLatchRequest && (iIssueBus[`MOD_ISSUE_SRC1RS_RNG] != 0 || iIssueBus[`MOD_ISSUE_SRC0RS_RNG] != 0)) || wStall_Pre);

//assign wStall = (wSource1_RS == 0 & wSource0_RS == 0) ? 1'b0 : 1'b1;

wire wLatchData0FromCommitBus;

wire wLatchData1FromCommitBus;

assign wLatchData0FromCommitBus = ((wSource0_RS != 0) && (wStall == 1'b1) && (iCommitBus[`MOD_COMMIT_RSID_RNG] == wSource0_RS)) ? 1'b1 : 1'b0;

assign wLatchData1FromCommitBus = ((wSource1_RS != 0) && (wStall == 1'b1) && (iCommitBus[`MOD_COMMIT_RSID_RNG] == wSource1_RS)) ? 1'b1 : 1'b0;

wire wBusy;

assign oBusy = wBusy | wCommitFifoFull & ~iCommitGranted;

wire wCommitGrantedDelay;

UPCOUNTER_POSEDGE # ( 1 ) BUSY

(

        .Clock(    Clock                                  ),

        .Reset(    Reset                                  ),

        .Enable(   wLatchRequest |  iCommitGranted        ),

        .Initial( 1'b0                                    ),

        .Q(        wBusy                                  )

);

assign oSource0 =  (wLatchData0FromCommitBus) ? iCommitBus[`MOD_COMMIT_DATA_RNG] : iIssueBus[`MOD_ISSUE_SRC0_DATA_RNG];

assign oSource1 =  (wLatchData1FromCommitBus) ? (iCommitBus[`MOD_COMMIT_DATA_RNG]) : iIssueBus[`MOD_ISSUE_SRC1_DATA_RNG];

assign wTrigger = ( wLatchRequest | wLatchData0FromCommitBus | wLatchData1FromCommitBus);

wire [`DATA_ROW_WIDTH-1:0]                    wSrc1,wSrc0;

//FFD_POSEDGE_SYNCRONOUS_RESET # ( `MOD_ISSUE_PACKET_SIZE ) ISSUE_FFD

//(     Clock, Reset, wLatchRequest , iIssueBus, {wDstZero,wID,wWE,wDestination,wSource1_RS,wSource0_RS,wSrc1,wSrc0} );

wire [3:0] wScale;

FFD_POSEDGE_SYNCRONOUS_RESET # ( `MOD_ISSUE_PACKET_SIZE ) ISSUE_FFD

(       Clock, Reset, wLatchRequest , iIssueBus, {wID,wDestination,wWE,wScale,wSource1_RS,wSrc1,wSource0_RS,wSrc0} );

assign oSrc0Latched = (wLatchData0FromCommitBus)? oSource0 : wSrc0;

assign oSrc1Latched = (wLatchData1FromCommitBus)? oSource1 : wSrc1;

assign wTag0 = wSrc0[`MOD_ISSUE_TAG0_RNG];

assign wTag1 = wSrc1[`MOD_ISSUE_TAG0_RNG];

sync_fifo  # (`COMMIT_PACKET_SIZE ) COMMIT_OUT_FIFO