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bpred tab cleanup

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David Harris 2023-01-24 05:42:34 -08:00
parent fc6cf1f198
commit 5233117568
1 changed files with 27 additions and 27 deletions
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pipelined/src/ifu/bpred.sv
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@ -29,36 +29,36 @@
`include "wally-config.vh" `include "wally-config.vh"
module bpred ( module bpred (
input logic clk, reset, input logic clk, reset,
input logic StallF, StallD, StallE, StallM, StallW, input logic StallF, StallD, StallE, StallM, StallW,
input logic FlushD, FlushE, FlushM, FlushW, input logic FlushD, FlushE, FlushM, FlushW,
// Fetch stage // Fetch stage
// the prediction // the prediction
input logic [31:0] InstrD, // Decompressed decode stage instruction. Used to decode instruction class input logic [31:0] InstrD, // Decompressed decode stage instruction. Used to decode instruction class
input logic [`XLEN-1:0] PCNextF, // Next Fetch Address input logic [`XLEN-1:0] PCNextF, // Next Fetch Address
input logic [`XLEN-1:0] PCPlus2or4F, // PCF+2/4 input logic [`XLEN-1:0] PCPlus2or4F, // PCF+2/4
output logic [`XLEN-1:0] PCNext1F, // Branch Predictor predicted or corrected fetch address on miss prediction output logic [`XLEN-1:0] PCNext1F, // Branch Predictor predicted or corrected fetch address on miss prediction
output logic [`XLEN-1:0] NextValidPCE, // Address of next valid instruction after the instruction in the Memory stage output logic [`XLEN-1:0] NextValidPCE, // Address of next valid instruction after the instruction in the Memory stage
// Update Predictor // Update Predictor
input logic [`XLEN-1:0] PCF, // Fetch stage instruction address input logic [`XLEN-1:0] PCF, // Fetch stage instruction address
input logic [`XLEN-1:0] PCD, // Decode stage instruction address. Also the address the branch predictor took input logic [`XLEN-1:0] PCD, // Decode stage instruction address. Also the address the branch predictor took
input logic [`XLEN-1:0] PCE, // Execution stage instruction address input logic [`XLEN-1:0] PCE, // Execution stage instruction address
input logic [`XLEN-1:0] PCM, // Memory stage instruction address input logic [`XLEN-1:0] PCM, // Memory stage instruction address
// Branch and jump outcome // Branch and jump outcome
input logic PCSrcE, // Executation stage branch is taken input logic PCSrcE, // Executation stage branch is taken
input logic [`XLEN-1:0] IEUAdrE, // The branch/jump target address input logic [`XLEN-1:0] IEUAdrE, // The branch/jump target address
input logic [`XLEN-1:0] PCLinkE, // The address following the branch instruction. (AKA Fall through address) input logic [`XLEN-1:0] PCLinkE, // The address following the branch instruction. (AKA Fall through address)
output logic [3:0] InstrClassM, // The valid instruction class. 1-hot encoded as jalr, ret, jr (not ret), j, br output logic [3:0] InstrClassM, // The valid instruction class. 1-hot encoded as jalr, ret, jr (not ret), j, br
// Report branch prediction status // Report branch prediction status
output logic BPPredWrongE, // Prediction is wrong output logic BPPredWrongE, // Prediction is wrong
output logic DirPredictionWrongM, // Prediction direction is wrong output logic DirPredictionWrongM, // Prediction direction is wrong
output logic BTBPredPCWrongM, // Prediction target wrong output logic BTBPredPCWrongM, // Prediction target wrong
output logic RASPredPCWrongM, // RAS prediction is wrong output logic RASPredPCWrongM, // RAS prediction is wrong
output logic PredictionInstrClassWrongM // Class prediction is wrong output logic PredictionInstrClassWrongM // Class prediction is wrong
); );
logic BTBValidF; logic BTBValidF;
logic [1:0] DirPredictionF; logic [1:0] DirPredictionF;