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Fixed bug with gshare repair from branch class miss prediction.

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This commit is contained in:
Ross Thompson 2023-01-15 14:39:48 -06:00
parent b7f579a146
commit 4e1e10a729
1 changed files with 2 additions and 2 deletions
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pipelined/src/ifu/speculativegshare.sv
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@ -123,8 +123,8 @@ module speculativegshare
assign GHRNextD = FlushD ? {GHRNextE, GHRNextE[0]} : {DirPredictionF[1], GHRF, GHRF[0]};
flopenr #(k+2) GHRDReg(clk, reset, (~StallD) | FlushD, GHRNextD, OldGHRD);
assign GHRD = WrongPredInstrClassD[0] & BranchInstrD ? {DirPredictionD[1], OldGHRD[k:1]} : // shift right
WrongPredInstrClassD[0] & ~BranchInstrD ? OldGHRD[k-2:-1] : // shift left
OldGHRD;
WrongPredInstrClassD[0] & ~BranchInstrD ? OldGHRD[k-1:-1] : // shift left
OldGHRD[k:0];
assign GHRNextE = FlushE ? GHRNextM : GHRD;
flopenr #(k+1) GHREReg(clk, reset, (~StallE) | FlushE, GHRNextE, OldGHRE);