From 0b873507ad47e3046935dfc8b3f91d36bc21c7b0 Mon Sep 17 00:00:00 2001 From: "Pavel V. Shatov (Meister)" <meisterpaul1@yandex.ru> Date: Tue, 27 Jun 2017 13:44:08 +0300 Subject: Added systolic modular multiplier w/ testbench. * works in simulator * may have to change how internal operand buffer is pre-loaded (shift register instead of wide mux?) * code needs some cleanup --- src/rtl/util/bram_1rw_1ro_readfirst.v | 88 +++++++++++++++++++++++++++++++++++ src/rtl/util/bram_1rw_readfirst.v | 75 +++++++++++++++++++++++++++++ 2 files changed, 163 insertions(+) create mode 100644 src/rtl/util/bram_1rw_1ro_readfirst.v create mode 100644 src/rtl/util/bram_1rw_readfirst.v (limited to 'src/rtl/util') diff --git a/src/rtl/util/bram_1rw_1ro_readfirst.v b/src/rtl/util/bram_1rw_1ro_readfirst.v new file mode 100644 index 0000000..56cb24e --- /dev/null +++ b/src/rtl/util/bram_1rw_1ro_readfirst.v @@ -0,0 +1,88 @@ +//====================================================================== +// +// Copyright (c) 2015, 2017 NORDUnet A/S All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions +// are met: +// - Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// - Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the distribution. +// +// - Neither the name of the NORDUnet nor the names of its contributors may +// be used to endorse or promote products derived from this software +// without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS +// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED +// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +`timescale 1ns / 1ps + +module bram_1rw_1ro_readfirst + #(parameter MEM_WIDTH = 32, + parameter MEM_ADDR_BITS = 8) + ( + input wire clk, + + input wire [MEM_ADDR_BITS-1:0] a_addr, + input wire a_wr, + input wire [MEM_WIDTH-1:0] a_in, + output wire [MEM_WIDTH-1:0] a_out, + + input wire [MEM_ADDR_BITS-1:0] b_addr, + output wire [MEM_WIDTH-1:0] b_out + ); + + + // + // BRAM + // + (* RAM_STYLE="BLOCK" *) + reg [MEM_WIDTH-1:0] bram[0:(2**MEM_ADDR_BITS)-1]; + + + // + // Output Registers + // + reg [MEM_WIDTH-1:0] bram_reg_a; + reg [MEM_WIDTH-1:0] bram_reg_b; + + assign a_out = bram_reg_a; + assign b_out = bram_reg_b; + + + // + // Read-Write Port A + // + always @(posedge clk) begin + // + bram_reg_a <= bram[a_addr]; + // + if (a_wr) bram[a_addr] <= a_in; + // + end + + + // + // Read-Only Port B + // + always @(posedge clk) + // + bram_reg_b <= bram[b_addr]; + + +endmodule diff --git a/src/rtl/util/bram_1rw_readfirst.v b/src/rtl/util/bram_1rw_readfirst.v new file mode 100644 index 0000000..30ecae8 --- /dev/null +++ b/src/rtl/util/bram_1rw_readfirst.v @@ -0,0 +1,75 @@ +//====================================================================== +// +// Copyright (c) 2017, NORDUnet A/S All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions +// are met: +// - Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// - Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the distribution. +// +// - Neither the name of the NORDUnet nor the names of its contributors may +// be used to endorse or promote products derived from this software +// without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS +// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED +// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +// TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +//====================================================================== + +`timescale 1ns / 1ps + +module bram_1rw_readfirst + #(parameter MEM_WIDTH = 32, + parameter MEM_ADDR_BITS = 8) + ( + input wire clk, + + input wire [MEM_ADDR_BITS-1:0] a_addr, + input wire a_wr, + input wire [MEM_WIDTH-1:0] a_in, + output wire [MEM_WIDTH-1:0] a_out + ); + + + // + // BRAM + // + (* RAM_STYLE="BLOCK" *) + reg [MEM_WIDTH-1:0] bram[0:(2**MEM_ADDR_BITS)-1]; + + + // + // Output Register + // + reg [MEM_WIDTH-1:0] bram_reg_a; + + assign a_out = bram_reg_a; + + + // + // Read-Write Port A + // + always @(posedge clk) begin + // + bram_reg_a <= bram[a_addr]; + // + if (a_wr) bram[a_addr] <= a_in; + // + end + + +endmodule -- cgit v1.2.3