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Removed unused PredInstrClassE register from bpred

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David Harris 2023-02-18 05:59:25 -08:00
parent 0f4226a950
commit 0eda753dc4
1 changed files with 2 additions and 3 deletions
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src/ifu/bpred/bpred.sv
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@ -72,7 +72,7 @@ module bpred (
logic PredValidF; logic PredValidF;
logic [1:0] DirPredictionF; logic [1:0] DirPredictionF;
logic [3:0] BTBPredInstrClassF, PredInstrClassF, PredInstrClassD, PredInstrClassE; logic [3:0] BTBPredInstrClassF, PredInstrClassF, PredInstrClassD;
logic [`XLEN-1:0] PredPCF, RASPCF; logic [`XLEN-1:0] PredPCF, RASPCF;
logic PredictionPCWrongE; logic PredictionPCWrongE;
logic AnyWrongPredInstrClassD, AnyWrongPredInstrClassE; logic AnyWrongPredInstrClassD, AnyWrongPredInstrClassE;
@ -207,8 +207,7 @@ module bpred (
// pipeline the class // pipeline the class
flopenrc #(4) PredInstrClassRegD(clk, reset, FlushD, ~StallD, PredInstrClassF, PredInstrClassD); flopenrc #(4) PredInstrClassRegD(clk, reset, FlushD, ~StallD, PredInstrClassF, PredInstrClassD);
flopenrc #(1) WrongInstrClassRegE(clk, reset, FlushE, ~StallE, AnyWrongPredInstrClassD, AnyWrongPredInstrClassE); flopenrc #(1) WrongInstrClassRegE(clk, reset, FlushE, ~StallE, AnyWrongPredInstrClassD, AnyWrongPredInstrClassE);
flopenrc #(4) PredInstrClassRegE(clk, reset, FlushE, ~StallE, PredInstrClassD, PredInstrClassE);
// Check the prediction // Check the prediction
// if it is a CFI then check if the next instruction address (PCD) matches the branch's target or fallthrough address. // if it is a CFI then check if the next instruction address (PCD) matches the branch's target or fallthrough address.
// if the class prediction is wrong a regular instruction may have been predicted as a taken branch // if the class prediction is wrong a regular instruction may have been predicted as a taken branch