F2wNetLFSR.java

/*
 * Class:        F2wNetLFSR
 * Description:  digital net in base 2 starting from a linear feedback
                 shift register generator
 * Environment:  Java
 * Software:     SSJ 
 * Copyright (C) 2001  Pierre L'Ecuyer and Universite de Montreal
 * Organization: DIRO, Universite de Montreal
 * @author       
 * @since
 *
 *
 * 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.
 *
 */
package umontreal.ssj.hups;
 
import umontreal.ssj.util.PrintfFormat;

public class F2wNetLFSR extends DigitalNetBase2 {
   private F2wStructure param;


   public F2wNetLFSR(int w, int r, int modQ, int step, int nbcoeff, int coeff[], int nocoeff[], int dim) {
      param = new F2wStructure(w, r, modQ, step, nbcoeff, coeff, nocoeff);
      param.initParamLFSR();
      initNet(r, w, dim);
   }

   public F2wNetLFSR(String filename, int no, int dim) {
      param = new F2wStructure(filename, no);
      param.initParamLFSR();
      initNet(param.r, param.w, dim);
   }
 
   public String toString() {
      String s = "F2wNetLFSR:" + PrintfFormat.NEWLINE;
      return s + param.toString();
   }
 
   private void initNet(int r, int w, int dim) {
      numCols = r * w;
      numRows = 31;
      outDigits = 31;
      numPoints = (1 << numCols);
      this.dim = dim;
      normFactor = 1.0 / (1L << 31);
      genMat = new int[dim * numCols];
 
      for (int j = 0; j < numCols; j++) {
         param.state = 1 << (r * w - 1 - j);
         param.initF2wLFSR();
         genMat[j] = param.output;
         for (int i = 1; i < dim; i++) {
            param.F2wLFSR();
            genMat[i * numCols + j] = param.output;
         }
      }
   }
}