diff --git a/src/ieu/bmu/zbs.sv b/src/ieu/bmu/zbs.sv deleted file mode 100644 index 214d6e2c0..000000000 --- a/src/ieu/bmu/zbs.sv +++ /dev/null @@ -1,59 +0,0 @@ -/////////////////////////////////////////// -// zbs.sv -// -// Written: Kevin Kim <kekim@hmc.edu> and Kip Macsai-Goren <kmacsaigoren@hmc.edu> -// Created: 31 January 2023 -// Modified: -// -// Purpose: RISC-V single bit manipulation unit (ZBS instructions) -// -// Documentation: RISC-V System on Chip Design Chapter *** -// -// A component of the CORE-V-WALLY configurable RISC-V project. -// -// Copyright (C) 2021-23 Harvey Mudd College & Oklahoma State University -// -// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1 -// -// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file -// except in compliance with the License, or, at your option, the Apache License version 2.0. You -// may obtain a copy of the License at -// -// https://solderpad.org/licenses/SHL-2.1/ -// -// Unless required by applicable law or agreed to in writing, any work distributed under the -// License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, -// either express or implied. See the License for the specific language governing permissions -// and limitations under the License. -//////////////////////////////////////////////////////////////////////////////////////////////// - -`include "wally-config.vh" - -module zbs #(parameter WIDTH=32) ( - input logic [WIDTH-1:0] A, B, // Operands - //input logic [2:0] ALUControl, // With Funct3, indicates operation to perform - input logic [6:0] Funct7, - input logic [2:0] Funct3, // With ***Control, indicates operation to perform - output logic [WIDTH-1:0] ZBSResult); // ZBS result - - logic [WIDTH-1:0] BMask, ClrResult, InvResult, ExtResult, SetResult; - - decoder #($clog2(WIDTH)) maskgen (B[$clog2(WIDTH)-1:0], BMask); - - assign InvResult = A ^ BMask; - assign ClrResult = A & ~BMask; - assign SetResult = A | BMask; - assign ExtResult = {{(WIDTH-1){1'b0}},{|(A & BMask)}}; - - always_comb begin - casez ({Funct7, Funct3}) - 10'b010010?_001: ZBSResult = ClrResult; - 10'b010010?_101: ZBSResult = ExtResult; - 10'b011010?_001: ZBSResult = InvResult; - 10'b001010?_001: ZBSResult = SetResult; - default: ZBSResult = 0; // *** expand to include faults - endcase - end - -endmodule -