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Modify ALU to handle Zkne/K extension

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James E. Stine 2024-02-22 11:55:00 -06:00
parent 7cb170c19b
commit 550f50debb
1 changed files with 9 additions and 5 deletions
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14
src/ieu/alu.sv
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@ -2,8 +2,9 @@
// alu.sv
//
// Written: David_Harris@hmc.edu, Sarah.Harris@unlv.edu, kekim@hmc.edu
// kelvin.tran@okstate.edu, james.stine@okstate.edu
// Created: 9 January 2021
// Modified: 3 March 2023
// Modified: 3 March 2023, 22 February 2024
//
// Purpose: RISC-V Arithmetic/Logic Unit
//
@ -33,9 +34,11 @@ module alu import cvw::*; #(parameter cvw_t P) (
input logic W64, // W64-type instruction
input logic SubArith, // Subtraction or arithmetic shift
input logic [2:0] ALUSelect, // ALU mux select signal
input logic [1:0] BSelect, // Binary encoding of if it's a ZBA_ZBB_ZBC_ZBS instruction
input logic [2:0] ZBBSelect, // ZBB mux select signal
input logic [3:0] BSelect, // Binary encoding of if it's a ZBA_ZBB_ZBC_ZBS instruction
input logic [3:0] ZBBSelect, // ZBB mux select signal
input logic [2:0] Funct3, // For BMU decoding
input logic [6:0] Funct7, // For ZKNE and ZKND computation
input logic [4:0] Rs2E, // For ZKNE and ZKND computation
input logic [2:0] BALUControl, // ALU Control signals for B instructions in Execute Stage
input logic BMUActive, // Bit manipulation instruction being executed
input logic [1:0] CZero, // {czero.nez, czero.eqz} instructions active
@ -89,10 +92,11 @@ module alu import cvw::*; #(parameter cvw_t P) (
else assign PreALUResult = FullResult;
// Bit manipulation muxing
if (P.ZBC_SUPPORTED | P.ZBS_SUPPORTED | P.ZBA_SUPPORTED | P.ZBB_SUPPORTED) begin : bitmanipalu
if (P.ZBC_SUPPORTED | P.ZBS_SUPPORTED | P.ZBA_SUPPORTED | P.ZBB_SUPPORTED | P.ZBKB_SUPPORTED |
P.ZBKC_SUPPORTED | P.ZBKX_SUPPORTED | P.ZKND_SUPPORTED | P.ZKNE_SUPPORTED | P.ZKNH_SUPPORTED) begin : bitmanipalu
bitmanipalu #(P) balu(
.A, .B, .W64, .BSelect, .ZBBSelect, .BMUActive,
.Funct3, .LT,.LTU, .BALUControl, .PreALUResult, .FullResult,
.Funct3, .Funct7, .Rs2E, .LT, .LTU, .BALUControl, .PreALUResult, .FullResult,
.CondMaskB, .CondShiftA, .ALUResult);
end else begin
assign ALUResult = PreALUResult;