From 5200ed3d2ea64c792c555a3d2b9dd3f5d6519336 Mon Sep 17 00:00:00 2001 From: Kevin Kim Date: Sun, 5 Feb 2023 00:11:12 +0000 Subject: [PATCH] added population count in generic modules --- pipelined/src/generic/popcnt.sv | 40 +++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 pipelined/src/generic/popcnt.sv diff --git a/pipelined/src/generic/popcnt.sv b/pipelined/src/generic/popcnt.sv new file mode 100644 index 00000000..a5135dd1 --- /dev/null +++ b/pipelined/src/generic/popcnt.sv @@ -0,0 +1,40 @@ + +/////////////////////////////////////////// +// +// Written: Kevin Kim +// Modified: 2/4/2023 +// +// Purpose: Population Count +// +// 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. +//////////////////////////////////////////////////////////////////////////////////////////////// + +module popcnt #(parameter WIDTH = 32) ( + input logic [WIDTH-1:0] num, // number to count total ones + output logic [$clog2(WIDTH):0] PopCnt // the total number of ones +); + + logic [$clog2(WIDTH):0] sum; + genvar i; + for (i=0;i