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Separate gm2.sv to be separate module
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@ -33,13 +33,3 @@ module galoismult_forward(input logic [7:0] in, output logic [7:0] out);
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assign out = in[7] ? (leftshift ^ 8'b00011011) : leftshift;
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assign out = in[7] ? (leftshift ^ 8'b00011011) : leftshift;
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endmodule
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endmodule
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module gm2 (gm2_In, gm2_Out);
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input logic [7:0] gm2_In;
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output logic [7:0] gm2_Out;
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// Set output to Galois Mult 2
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assign gm2_Out = {gm2_In[6:0], 1'b0} ^ (8'h1b & {8{gm2_In[7]}});
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endmodule
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36
src/ieu/aes_common/gm2.sv
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36
src/ieu/aes_common/gm2.sv
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@ -0,0 +1,36 @@
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///////////////////////////////////////////
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// gm2.sv
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//
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// Written: ryan.swann@okstate.edu, james.stine@okstate.edu, David_Harris@hmc.edu
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// Created: 20 February 2024
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//
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// Purpose: Galois field operations for mix columns operation
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//
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// A component of the CORE-V-WALLY configurable RISC-V project.
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// https://github.com/openhwgroup/cvw
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//
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// Copyright (C) 2021-24 Harvey Mudd College & Oklahoma State University
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//
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// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
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//
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// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file
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// except in compliance with the License, or, at your option, the Apache License version 2.0. You
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// may obtain a copy of the License at
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//
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// https://solderpad.org/licenses/SHL-2.1/
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//
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// Unless required by applicable law or agreed to in writing, any work distributed under the
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// License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions
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// and limitations under the License.
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////////////////////////////////////////////////////////////////////////////////////////////////
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module gm2 (gm2_In, gm2_Out);
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input logic [7:0] gm2_In;
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output logic [7:0] gm2_Out;
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// Set output to Galois Mult 2
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assign gm2_Out = {gm2_In[6:0], 1'b0} ^ (8'h1b & {8{gm2_In[7]}});
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endmodule
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