pluto_hdl_adi/library/altera/common/ad_mul.v

89 lines
2.9 KiB
Verilog

// ***************************************************************************
// ***************************************************************************
// Copyright 2014 - 2017 (c) Analog Devices, Inc. All rights reserved.
//
// In this HDL repository, there are many different and unique modules, consisting
// of various HDL (Verilog or VHDL) components. The individual modules are
// developed independently, and may be accompanied by separate and unique license
// terms.
//
// The user should read each of these license terms, and understand the
// freedoms and responsabilities that he or she has by using this source/core.
//
// This core is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE.
//
// Redistribution and use of source or resulting binaries, with or without modification
// of this file, are permitted under one of the following two license terms:
//
// 1. The GNU General Public License version 2 as published by the
// Free Software Foundation, which can be found in the top level directory
// of this repository (LICENSE_GPL2), and also online at:
// <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
//
// OR
//
// 2. An ADI specific BSD license, which can be found in the top level directory
// of this repository (LICENSE_ADIBSD), and also on-line at:
// https://github.com/analogdevicesinc/hdl/blob/master/LICENSE_ADIBSD
// This will allow to generate bit files and not release the source code,
// as long as it attaches to an ADI device.
//
// ***************************************************************************
// ***************************************************************************
`timescale 1ps/1ps
module ad_mul #(
parameter DELAY_DATA_WIDTH = 16) (
// data_p = data_a * data_b;
input clk,
input [16:0] data_a,
input [16:0] data_b,
output [33:0] data_p,
// delay interface
input [(DELAY_DATA_WIDTH-1):0] ddata_in,
output reg [(DELAY_DATA_WIDTH-1):0] ddata_out);
// internal registers
reg [(DELAY_DATA_WIDTH-1):0] p1_ddata = 'd0;
reg [(DELAY_DATA_WIDTH-1):0] p2_ddata = 'd0;
// a/b reg, m-reg, p-reg delay match
always @(posedge clk) begin
p1_ddata <= ddata_in;
p2_ddata <= p1_ddata;
ddata_out <= p2_ddata;
end
lpm_mult #(
.lpm_type ("lpm_mult"),
.lpm_widtha (17),
.lpm_widthb (17),
.lpm_widthp (34),
.lpm_representation ("SIGNED"),
.lpm_pipeline (3))
i_lpm_mult (
.clken (1'b1),
.aclr (1'b0),
.sclr (1'b0),
.sum (1'b0),
.clock (clk),
.dataa (data_a),
.datab (data_b),
.result (data_p));
endmodule
// ***************************************************************************
// ***************************************************************************