From 1a209aac21b0028bf7c3f71e8ad0db7e1f129bfe Mon Sep 17 00:00:00 2001
From: Kevin Kim <kevindkim723@gmail.com>
Date: Tue, 14 Feb 2023 13:06:31 -0800
Subject: [PATCH] reverted back to I tests working

---
 src/ieu/alu.sv           |  6 ++--
 src/ieu/bmu/clmul.sv.bak | 64 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+), 3 deletions(-)
 create mode 100644 src/ieu/bmu/clmul.sv.bak

diff --git a/src/ieu/alu.sv b/src/ieu/alu.sv
index 97cda8729..daf60f23e 100644
--- a/src/ieu/alu.sv
+++ b/src/ieu/alu.sv
@@ -69,9 +69,9 @@ module alu #(parameter WIDTH=32) (
       endcase
 
       case ({Funct7,Funct3})
-        10'b0100000_111: InvB = 1'b1;                                   //andn
-        10'b0100000_110: InvB = 1'b1;                                   //orn
-        10'b0100000_100: InvB = 1'b1;                                   //xnor
+        10'b0100000_111: InvB = 1'b0;                                   //andn
+        10'b0100000_110: InvB = 1'b0;                                   //orn
+        10'b0100000_100: InvB = 1'b0;                                   //xnor
         default: InvB = 1'b0;
       endcase
 
diff --git a/src/ieu/bmu/clmul.sv.bak b/src/ieu/bmu/clmul.sv.bak
new file mode 100644
index 000000000..36f1dea21
--- /dev/null
+++ b/src/ieu/bmu/clmul.sv.bak
@@ -0,0 +1,64 @@
+///////////////////////////////////////////
+// clmul.sv
+//
+// Written: Kevin Kim <kekim@hmc.edu> and Kip Macsai-Goren <kmacsaigoren@hmc.edu>
+// Created: 1 February 2023
+// Modified: 
+//
+// Purpose: Carry-Less multiplication top-level unit
+//
+// 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 clmul #(parameter WIDTH=32) (
+  input  logic [WIDTH-1:0] A, B,       // Operands
+  output logic [WIDTH-1:0] ClmulResult);     // ZBS result
+
+  logic [WIDTH-1:0] pp [WIDTH-1:0]; //partial AND products
+  // Note: only generates the bottom WIDTH bits of the carryless multiply.
+  //    To get the high bits or the reversed bits, the inputs can be shifted and reversed
+  //    as they are in zbc where this is instantiated
+  /*
+  genvar i;
+  for (i=0; i<WIDTH; i++) begin
+    assign pp[i] = ((A & {(WIDTH){B[i]}}) << i); // Fill partial product array
+    // ClmulResult ^= pp[i];
+  end
+  assign ClmulResult = pp.xor();
+  */
+  genvar i,j;
+  for (i=1; i<WIDTH;i++) begin:outer //loop fills partial product array
+    for (j=0;j<=i;j++) begin:inner
+      assign pp[i][j] = A[i]&B[j];
+    end
+  end
+
+  for (i=1;i<WIDTH;i++) begin:xortree
+    assign ClmulResult[i] = ^pp[i:0][i];
+    
+  end
+
+  assign ClmulResult[0] = A[0]&B[0];
+
+endmodule
+
+