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Minor bug fix in gshare.

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This commit is contained in:
Ross Thompson 2023-01-31 10:45:32 -06:00
parent ad0a0f0d51
commit 5a770f148c
1 changed files with 3 additions and 3 deletions
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6
pipelined/src/ifu/bpred/speculativegshare.sv
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@ -105,8 +105,8 @@ module speculativegshare #(parameter int k = 10 ) (
{FlushDOrDirWrong, PredInstrClassF[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 | FlushDOrDirWrong, GHRNextF, GHRF);
flopenr #(1) GHRFLastReg(clk, reset, ~StallF | FlushDOrDirWrong, 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.
@ -116,7 +116,7 @@ module speculativegshare #(parameter int k = 10 ) (
// 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);
flopenr #(k) GHRDReg(clk, reset, ~StallD | FlushDOrDirWrong, GHRNextD, GHRD);
mux3 #(k) GHREMux(GHRD, GHRE, {PCSrcE, GHRD[k-2:0]}, {InstrClassE[0] & ~FlushM, FlushE}, GHRNextE);