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Renamed signals to match figure 10.18.

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This commit is contained in:
Ross Thompson 2023-02-24 19:22:14 -06:00
parent ea71fd09f5
commit 6ff524d843
2 changed files with 5 additions and 5 deletions
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2
src/ifu/bpred/bpred.sv
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@ -150,7 +150,7 @@ module bpred (
TargetPredictor(.clk, .reset, .StallF, .StallD, .StallE, .StallM, .StallW, .FlushD, .FlushE, .FlushM, .FlushW,
.PCNextF, .PCF, .PCD, .PCE, .PCM, .PCW,
.BTAF, .BTAD,
.BTBPredInstrClassF({BTBJalF, BTBRetF, BTBJumpF, BTBBranchF}),
.BTBIClassF({BTBJalF, BTBRetF, BTBJumpF, BTBBranchF}),
.PredictionInstrClassWrongM,
.IEUAdrE, .IEUAdrM, .IEUAdrW,
.InstrClassD({JalD, RetD, JumpD, BranchD}), .InstrClassE({JalE, RetE, JumpE, BranchE}), .InstrClassM({JalM, RetM, JumpM, BranchM}),

8
src/ifu/bpred/btb.sv
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@ -37,7 +37,7 @@ module btb #(parameter Depth = 10 ) (
input logic [`XLEN-1:0] PCNextF, PCF, PCD, PCE, PCM, PCW,// PC at various stages
output logic [`XLEN-1:0] BTAF, // BTB's guess at PC
output logic [`XLEN-1:0] BTAD,
output logic [3:0] BTBPredInstrClassF, // BTB's guess at instruction class
output logic [3:0] BTBIClassF, // BTB's guess at instruction class
// update
input logic PredictionInstrClassWrongM, // BTB's instruction class guess was wrong
input logic [`XLEN-1:0] IEUAdrE, // Branch/jump target address to insert into btb
@ -53,7 +53,7 @@ module btb #(parameter Depth = 10 ) (
logic [`XLEN-1:0] ResetPC;
logic MatchD, MatchE, MatchM, MatchW, MatchX;
logic [`XLEN+3:0] ForwardBTBPrediction, ForwardBTBPredictionF;
logic [`XLEN+3:0] TableBTBPredictionF;
logic [`XLEN+3:0] TableBTBPredF;
logic UpdateEn;
// hashing function for indexing the PC
@ -84,13 +84,13 @@ module btb #(parameter Depth = 10 ) (
MatchM ? {InstrClassM, IEUAdrM} :
{InstrClassW, IEUAdrW} ;
assign {BTBPredInstrClassF, BTAF} = MatchX ? ForwardBTBPredictionF : {TableBTBPredictionF};
assign {BTBIClassF, BTAF} = MatchX ? ForwardBTBPredictionF : {TableBTBPredF};
assign UpdateEn = |InstrClassM | PredictionInstrClassWrongM;
// An optimization may be using a PC relative address.
ram2p1r1wbe #(2**Depth, `XLEN+4) memory(
.clk, .ce1(~StallF | reset), .ra1(PCNextFIndex), .rd1(TableBTBPredictionF),
.clk, .ce1(~StallF | reset), .ra1(PCNextFIndex), .rd1(TableBTBPredF),
.ce2(~StallW & ~FlushW), .wa2(PCMIndex), .wd2({InstrClassM, IEUAdrM}), .we2(UpdateEn), .bwe2('1));
flopenrc #(`XLEN) BTBD(clk, reset, FlushD, ~StallD, BTAF, BTAD);