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[/] [tiny_tate_bilinear_pairing/] [trunk/] [group_size_is_911_bits/] [rtl/] [const.v] - Rev 15
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/* * Copyright 2012, Homer Hsing <homer.hsing@gmail.com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * 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. */ `define M 593 // M is the degree of the irreducible polynomial `define WIDTH (2*`M-1) // width for a GF(3^M) element `define WIDTH_D0 1187 /* * the module of constants * * addr out effective * 1 0 1 * 2 1 1 * 4 + 1 * 8 - 1 * 16 cubic 1 * other 0 0 */ module const_ (clk, addr, out, effective); input clk; input [5:0] addr; output reg [`WIDTH_D0:0] out; output reg effective; // active high if out is effective always @ (posedge clk) begin effective <= 1; case (addr) 1: out <= 0; 2: out <= 1; 4: out <= {6'b000101, 1182'd0}; 8: out <= {6'b001001, 1182'd0}; 16: out <= {6'b010101, 1182'd0}; default: begin out <= 0; effective <= 0; end endcase end endmodule