Class BitManipulation

java.lang.Object
gov.fnal.eag.healpix.BitManipulation

public final class BitManipulation extends Object
bit manipulation class derived from Healpix fortran90 program.
Author:
N Kuropatkin
  • Constructor Summary

    Constructors
    Constructor
    Description
     
  • Method Summary

    Modifier and Type
    Method
    Description
    static long
    invLSB(long i)
    returns i with even bits inverted
    static long
    invMSB(long i)
    returns i with odd bits inverted
    static long
    invswapLSBMSB(long i)
    returns NOT i with even and odd bit positions interchanged
    static void
    main(String[] pars)
    the main program for simple test
    static double
    MODULO(double a, double b)
    simulates behaviour of fortran90 MODULO function
    static long
    swapLSBMSB(long i)
    swaps low and high bits in the word i

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

    • BitManipulation

      public BitManipulation()
  • Method Details

    • swapLSBMSB

      public static long swapLSBMSB(long i)
      swaps low and high bits in the word i
      Parameters:
      i - integer input word
      Returns:
      int a word with odd and even bits interchanged
    • invswapLSBMSB

      public static long invswapLSBMSB(long i)
      returns NOT i with even and odd bit positions interchanged
      Parameters:
      i - int input word
      Returns:
      int NOT (i with LSBMSB)
    • invLSB

      public static long invLSB(long i)
      returns i with even bits inverted
      Parameters:
      i - int input word
      Returns:
      int word with modified bits
    • invMSB

      public static long invMSB(long i)
      returns i with odd bits inverted
      Parameters:
      i - int input word
      Returns:
      int word with modified bits
    • MODULO

      public static double MODULO(double a, double b)
      simulates behaviour of fortran90 MODULO function
      Parameters:
      a - double
      b - double
      Returns:
      double MODULO
    • main

      public static void main(String[] pars)
      the main program for simple test
      Parameters:
      pars -