diff --git a/pipelined/src/ifu/bpred/bpred.sv b/pipelined/src/ifu/bpred/bpred.sv index cccbe29f0..0f2b4bf6c 100644 --- a/pipelined/src/ifu/bpred/bpred.sv +++ b/pipelined/src/ifu/bpred/bpred.sv @@ -117,8 +117,7 @@ module bpred ( end else if (`BPRED_TYPE == "BPSPECULATIVEGSHARE") begin:Predictor speculativegshare #(`BPRED_SIZE) DirPredictor(.clk, .reset, .StallF, .StallD, .StallE, .StallM, .StallW, .FlushD, .FlushE, .FlushM, .FlushW, .PCNextF, .PCF, .PCD, .PCE, .PCM, .DirPredictionF, .DirPredictionWrongE, - .BranchInstrF(PredInstrClassF[0]), .BranchInstrD(InstrClassD[0]), .BranchInstrE(InstrClassE[0]), .BranchInstrM(InstrClassM[0]), - .BranchInstrW(InstrClassW[0]), .WrongPredInstrClassD, .PCSrcE); + .InstrClassF(PredInstrClassF), .InstrClassD, .InstrClassE, .WrongPredInstrClassD, .PCSrcE); end else if (`BPRED_TYPE == "BPLOCALPAg") begin:Predictor // *** Fix me diff --git a/pipelined/src/ifu/bpred/speculativegshare.sv b/pipelined/src/ifu/bpred/speculativegshare.sv index 5fc5b7122..2d0c9b90e 100644 --- a/pipelined/src/ifu/bpred/speculativegshare.sv +++ b/pipelined/src/ifu/bpred/speculativegshare.sv @@ -29,17 +29,17 @@ `include "wally-config.vh" module speculativegshare #(parameter int k = 10 ) ( - input logic clk, - input logic reset, - input logic StallF, StallD, StallE, StallM, StallW, - input logic FlushD, FlushE, FlushM, FlushW, - output logic [1:0] DirPredictionF, - output logic DirPredictionWrongE, + input logic clk, + input logic reset, + input logic StallF, StallD, StallE, StallM, StallW, + input logic FlushD, FlushE, FlushM, FlushW, + output logic [1:0] DirPredictionF, + output logic DirPredictionWrongE, // update input logic [`XLEN-1:0] PCNextF, PCF, PCD, PCE, PCM, - input logic BranchInstrF, BranchInstrD, BranchInstrE, BranchInstrM, BranchInstrW, - input logic [3:0] WrongPredInstrClassD, - input logic PCSrcE + input logic [3:0] InstrClassF, InstrClassD, InstrClassE, + input logic [3:0] WrongPredInstrClassD, + input logic PCSrcE ); logic MatchF, MatchD, MatchE; @@ -67,14 +67,14 @@ module speculativegshare #(parameter int k = 10 ) ( .rd1(TableDirPredictionF), .wa2(IndexE), .wd2(NewDirPredictionE), - .we2(BranchInstrE & ~StallM & ~FlushM), + .we2(InstrClassE[0]), .bwe2(1'b1)); // if there are non-flushed branches in the pipeline we need to forward the prediction from that stage to the NextF demi stage // and then register for use in the Fetch stage. - assign MatchF = BranchInstrF & ~FlushD & (IndexNextF == IndexF); - assign MatchD = BranchInstrD & ~FlushE & (IndexNextF == IndexD); - assign MatchE = BranchInstrE & ~FlushM & (IndexNextF == IndexE); + assign MatchF = InstrClassF[0] & ~FlushD & (IndexNextF == IndexF); + assign MatchD = InstrClassD[0] & ~FlushE & (IndexNextF == IndexD); + assign MatchE = InstrClassE[0] & ~FlushM & (IndexNextF == IndexE); assign MatchNextX = MatchF | MatchD | MatchE; flopenr #(1) MatchReg(clk, reset, ~StallF, MatchNextX, MatchXF); @@ -105,26 +105,26 @@ module speculativegshare #(parameter int k = 10 ) ( // For FlushE this is GHRE. GHRNextE is both. assign FlushDOrDirWrong = FlushD | DirPredictionWrongE; mux3 #(k) GHRFMux(GHRF, {DirPredictionF[1], GHRF[k-1:1]}, GHRNextE[k-1:0], - {FlushDOrDirWrong, BranchInstrF}, GHRNextF); + {FlushDOrDirWrong, InstrClassF[0]}, GHRNextF); // Need 1 extra bit to store the shifted out GHRF if repair needs to back shift. - flopenr #(k) GHRFReg(clk, reset, (~StallF) | FlushD, GHRNextF, GHRF); - flopenr #(1) GHRFLastReg(clk, reset, (~StallF) | FlushD, GHRF[0], GHRLastF); + flopenr #(k) GHRFReg(clk, reset, ~StallF | FlushD, GHRNextF, GHRF); + flopenr #(1) GHRFLastReg(clk, reset, ~StallF | FlushD, GHRF[0], GHRLastF); // With instruction class prediction, the class could be wrong and is checked in Decode. // If it is wrong and branch does exist then shift right and insert the prediction. // If the branch does not exist then shift left and use GHRLastF to restore the LSB. logic [k-1:0] GHRClassWrong; - mux2 #(k) GHRClassWrongMux({DirPredictionD[1], GHRF[k-1:1]}, {GHRF[k-2:0], GHRLastF}, BranchInstrD, GHRClassWrong); + mux2 #(k) GHRClassWrongMux({DirPredictionD[1], GHRF[k-1:1]}, {GHRF[k-2:0], GHRLastF}, InstrClassD[0], GHRClassWrong); // As with GHRF FlushD and wrong direction prediction flushes the pipeline and restores to GHRNextE. mux3 #(k) GHRDMux(GHRF, GHRClassWrong, GHRNextE, {FlushDOrDirWrong, WrongPredInstrClassD[0]}, GHRNextD); flopenr #(k) GHRDReg(clk, reset, (~StallD) | FlushD, GHRNextD, GHRD); - mux3 #(k) GHREMux(GHRD, GHRE, {PCSrcE, GHRD[k-2:0]}, {BranchInstrE & ~FlushM, FlushE}, GHRNextE); + mux3 #(k) GHREMux(GHRD, GHRE, {PCSrcE, GHRD[k-2:0]}, {InstrClassE[0] & ~FlushM, FlushE}, GHRNextE); - flopenr #(k) GHREReg(clk, reset, (BranchInstrE & ~StallE) | FlushE, GHRNextE, GHRE); + flopenr #(k) GHREReg(clk, reset, (InstrClassE[0] & ~StallE) | FlushE, GHRNextE, GHRE); - assign DirPredictionWrongE = PCSrcE != DirPredictionE[1] & BranchInstrE; + assign DirPredictionWrongE = PCSrcE != DirPredictionE[1] & InstrClassE[0]; endmodule