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Minor fix to btb.

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This commit is contained in:
Ross Thompson 2023-03-01 10:45:40 -06:00
parent e13ba72c61
commit dd2433f7ff
1 changed files with 7 additions and 5 deletions
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12
src/ifu/bpred/btb.sv
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@ -57,8 +57,8 @@ module btb #(parameter Depth = 10 ) (
logic [`XLEN+3:0] TableBTBPredF;
logic [`XLEN-1:0] IEUAdrW;
logic [`XLEN-1:0] PCW;
logic BTAWrongE, BTBWrongE;
logic BTBWrongM;
logic BTBWrongE, BTAWrongE;
logic BTBWrongM, BTAWrongM;
// hashing function for indexing the PC
@ -108,9 +108,11 @@ module btb #(parameter Depth = 10 ) (
// 2. BTAWrongE is used by the performance counters to track when the BTB's BTA or instruction class is wrong.
flopenrc #(`XLEN) BTBTargetEReg(clk, reset, FlushE, ~StallE, BTAD, BTAE);
assign BTAWrongE = (BTAE != IEUAdrE) & (InstrClassE[0] | InstrClassE[1] & ~InstrClassE[2]);
assign BTBWrongE = BTAWrongE | IClassWrongE;
flopenrc #(1) BTBWrongMReg(clk, reset, FlushM, ~StallM, BTBWrongE, BTBWrongM);
//assign BTBWrongE = BTAWrongE | IClassWrongE;
//flopenrc #(1) BTBWrongMReg(clk, reset, FlushM, ~StallM, BTBWrongE, BTBWrongM);
flopenrc #(1) BTAWrongMReg(clk, reset, FlushM, ~StallM, BTAWrongE, BTAWrongM);
assign BTBWrongM = BTAWrongM | IClassWrongM;
flopenr #(`XLEN) PCWReg(clk, reset, ~StallW, PCM, PCW);
flopenr #(`XLEN) IEUAdrWReg(clk, reset, ~StallW, IEUAdrM, IEUAdrW);