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Found issue with branch predictor.

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This commit is contained in:
Ross Thompson 2023-01-27 13:13:55 -06:00
parent 6c86c0389c
commit cf49c7ddc1
1 changed files with 2 additions and 2 deletions
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pipelined/src/ifu/brpred/speculativegshare.sv
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@ -113,8 +113,8 @@ module speculativegshare
flopenr #(k) GHRFReg(clk, reset, (~StallF) | FlushD, GHRNextF, OldGHRF);
flopenr #(1) GHRFExtraReg(clk, reset, (~StallF) | FlushD, GHRNextF[0], OldGHRExtraF);
assign GHRF = WrongPredInstrClassD[0] & BranchInstrD ? {DirPredictionD[1], OldGHRF[k-1:1]} : // shift right
WrongPredInstrClassD[0] & ~BranchInstrD ? {OldGHRF[k-1:0], OldGHRExtraF} : // shift left **** missing bit
OldGHRF[k:0];
WrongPredInstrClassD[0] & ~BranchInstrD ? {OldGHRF[k-2:0], OldGHRExtraF} : // shift left **** missing bit
OldGHRF[k-1:0];
assign GHRNextD = FlushD ? {GHRNextE, GHRNextE[0]} : {DirPredictionF[1], GHRF, GHRF[0]};