From de85f39e57b28d38cd565804862ef828f071d730 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Joachim=20Stro=CC=88mbergson?= Date: Mon, 20 Apr 2015 09:44:48 +0200 Subject: (1) Modexp with better API. (2) Adding working residue module. (3) Adding new shift32 with carry module needed by the residue module. --- src/rtl/shl32.v | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 src/rtl/shl32.v (limited to 'src/rtl/shl32.v') diff --git a/src/rtl/shl32.v b/src/rtl/shl32.v new file mode 100644 index 0000000..d0dd1bc --- /dev/null +++ b/src/rtl/shl32.v @@ -0,0 +1,53 @@ +//====================================================================== +// +// shr32.v +// --------- +// 32bit shifter with carry in / carry out. +// +// +// Author: Peter Magnusson +// Copyright (c) 2015, 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. +// +//====================================================================== + + +module shl32( + input [31 : 0] a, + input carry_in, + output wire [31 : 0] amul2, + output wire carry_out); + + reg [32 : 0] shl_result; + + assign amul2 = shl_result[31:0]; + assign carry_out = shl_result[32]; + + always @(a, carry_in) + shl_result = { a, carry_in }; +endmodule -- cgit v1.2.3