public class BitOps
extends java.lang.Object

• Method Summary

  All Methods

  Modifier and Type	Method and Description
  static IntNum	and (IntNum x, int y) Return the logical (bit-wise) "and" of an IntNum and an int.
  static IntNum	and (IntNum x, IntNum y) Return the logical (bit-wise) "and" of two IntNums.
  static int	bitCount (int i)
  static int	bitCount (int[] x, int len)
  static int	bitCount (IntNum x) Count one bits in an IntNum.
  static IntNum	bitOp (int op, IntNum x, IntNum y) Do one the the 16 possible bit-wise operations of two IntNums.
  static boolean	bitValue (IntNum x, int bitno) Return the value of a specified bit in an IntNum.
  static IntNum	extract (IntNum x, int startBit, int endBit) Extract a bit-field as an unsigned integer.
  static IntNum	ior (IntNum x, IntNum y) Return the logical (bit-wise) "(inclusive) or" of two IntNums.
  static int	lowestBitSet (int i)
  static int	lowestBitSet (IntNum x)
  static IntNum	makeMask (int startBit, int endBit) Create a mask with bits true form bits form startBit to endBit.
  static IntNum	not (IntNum x) Return the logical (bit-wise) negation of an IntNum.
  static IntNum	reverseBits (IntNum x, int start, int end)
  static void	setBitOp (IntNum result, int op, IntNum x, IntNum y) Do one the the 16 possible bit-wise operations of two IntNums.
  static IntNum	setBitValue (IntNum x, int bitno, int newValue) Set the value of a specified bit in an IntNum.
  static int	shift (int x, int count)
  static long	shift (long x, int count)
  static int	shiftUnsigned (int x, int count)
  static long	shiftUnsigned (long x, int count)
  static int	swappedOp (int op) Return the boolean opcode (for bitOp) for swapped operands.
  static boolean	test (IntNum x, int y) Return true iff an IntNum and an int have any true bits in common.
  static boolean	test (IntNum x, IntNum y) Return true iff two IntNums have any true bits in common.
  static IntNum	xor (IntNum x, IntNum y) Return the logical (bit-wise) "exclusive or" of two IntNums.

  • Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• Method Detail

  • bitValue

    public static boolean bitValue(IntNum x,
     int bitno)

    Return the value of a specified bit in an IntNum.

  • setBitValue

    public static IntNum setBitValue(IntNum x,
     int bitno,
     int newValue)

    Set the value of a specified bit in an IntNum.

  • test

    public static boolean test(IntNum x,
     int y)

    Return true iff an IntNum and an int have any true bits in common.

  • test

    public static boolean test(IntNum x,
     IntNum y)

    Return true iff two IntNums have any true bits in common.

  • and

    public static IntNum and(IntNum x,
     int y)

    Return the logical (bit-wise) "and" of an IntNum and an int.

  • and

    public static IntNum and(IntNum x,
     IntNum y)

    Return the logical (bit-wise) "and" of two IntNums.

  • ior

    public static IntNum ior(IntNum x,
     IntNum y)

    Return the logical (bit-wise) "(inclusive) or" of two IntNums.

  • xor

    public static IntNum xor(IntNum x,
     IntNum y)

    Return the logical (bit-wise) "exclusive or" of two IntNums.

  • not

    public static IntNum not(IntNum x)

    Return the logical (bit-wise) negation of an IntNum.

  • swappedOp

    public static int swappedOp(int op)

    Return the boolean opcode (for bitOp) for swapped operands. I.e. bitOp (swappedOp(op), x, y) == bitOp (op, y, x).

  • bitOp

    public static IntNum bitOp(int op,
     IntNum x,
     IntNum y)

    Do one the the 16 possible bit-wise operations of two IntNums.

  • setBitOp

    public static void setBitOp(IntNum result,
     int op,
     IntNum x,
     IntNum y)

    Do one the the 16 possible bit-wise operations of two IntNums.

  • makeMask

    public static IntNum makeMask(int startBit,
     int endBit)

    Create a mask with bits true form bits form startBit to endBit.

  • extract

    public static IntNum extract(IntNum x,
     int startBit,
     int endBit)

    Extract a bit-field as an unsigned integer.

  • lowestBitSet

    public static int lowestBitSet(int i)

  • lowestBitSet

    public static int lowestBitSet(IntNum x)

  • bitCount

    public static int bitCount(int i)

  • bitCount

    public static int bitCount(int[] x,
     int len)

  • bitCount

    public static int bitCount(IntNum x)

    Count one bits in an IntNum. If argument is negative, count zero bits instead.

  • reverseBits

    public static IntNum reverseBits(IntNum x,
     int start,
     int end)

  • shift

    public static int shift(int x,
     int count)

  • shiftUnsigned

    public static int shiftUnsigned(int x,
     int count)

  • shift

    public static long shift(long x,
     int count)

  • shiftUnsigned

    public static long shiftUnsigned(long x,
     int count)