avrora.util
Class Arithmetic
java.lang.Object
avrora.util.Arithmetic
- public class Arithmetic
- extends java.lang.Object
The Arithmetic class implements a set of useful methods that are used by the simulator and
assembler for converting java types to various data types used by the machine.
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Method Summary |
static int |
bitCount(byte value)
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static byte |
clearBit(byte val,
int bit)
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static boolean |
getBit(byte val,
int bit)
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static boolean |
getBit(int val,
int bit)
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static boolean |
getBit(long val,
int bit)
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static int |
getBitField(int value,
int[] permutation)
The getBitField() method reads a bit field from a value where the bits of the field
are not consecutive or in order. |
static int |
getBitField(int value,
int lowbit,
int length)
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static int |
getBitRangeMask(int low,
int high)
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static int |
getInverseBitRangeMask(int low,
int high)
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static int |
getSingleBitMask(int bit)
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static int |
getSingleInverseBitMask(int bit)
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static byte |
high(int val)
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static byte |
high(short val)
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static void |
inc(long[] vals,
int[] denom,
int pos)
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static byte |
low(int val)
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static byte |
low(short val)
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static int |
lowestBit(long value)
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static long[] |
modulus(long val,
int[] denom)
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static long |
mult(long[] vals,
int[] denom)
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static byte |
reverseBits(byte value)
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static byte |
setBit(byte val,
int bit)
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static byte |
setBit(byte val,
int bit,
boolean on)
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static int |
setBit(int val,
int bit,
boolean on)
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static long |
setBit(long val,
int bit,
boolean on)
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static int |
signExtend(int value,
int signbit)
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static char |
ubyte(byte b1)
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static char |
uhigh(char val)
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static char |
uhigh(short val)
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static char |
ulow(char val)
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static char |
ulow(short val)
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static char |
uword(byte b1,
byte b2)
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static short |
word(byte b1,
byte b2)
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| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Arithmetic
public Arithmetic()
word
public static short word(byte b1,
byte b2)
uword
public static char uword(byte b1,
byte b2)
signExtend
public static int signExtend(int value,
int signbit)
ubyte
public static char ubyte(byte b1)
low
public static byte low(short val)
high
public static byte high(short val)
low
public static byte low(int val)
high
public static byte high(int val)
ulow
public static char ulow(char val)
uhigh
public static char uhigh(char val)
ulow
public static char ulow(short val)
uhigh
public static char uhigh(short val)
getBit
public static boolean getBit(byte val,
int bit)
getBit
public static boolean getBit(long val,
int bit)
getBit
public static boolean getBit(int val,
int bit)
setBit
public static byte setBit(byte val,
int bit)
setBit
public static byte setBit(byte val,
int bit,
boolean on)
setBit
public static int setBit(int val,
int bit,
boolean on)
setBit
public static long setBit(long val,
int bit,
boolean on)
clearBit
public static byte clearBit(byte val,
int bit)
lowestBit
public static int lowestBit(long value)
getBitField
public static int getBitField(int value,
int[] permutation)
- The
getBitField() method reads a bit field from a value where the bits of the field
are not consecutive or in order. This method accepts an array of integers that denotes the permutation
of the bit field within the given value from highest order bits to lowest order bits
- Parameters:
value - the integer value to extract the bit field frompermutation - the permutation of the bits for which to extract the bit field from highest order bit to
lowest order bit
- Returns:
- the integer value resulting from concatentating the bits:
value[permutation[0]],
value[permutation[1]], etc into a single integer value
getBitField
public static int getBitField(int value,
int lowbit,
int length)
reverseBits
public static byte reverseBits(byte value)
bitCount
public static int bitCount(byte value)
getSingleBitMask
public static int getSingleBitMask(int bit)
getSingleInverseBitMask
public static int getSingleInverseBitMask(int bit)
getBitRangeMask
public static int getBitRangeMask(int low,
int high)
getInverseBitRangeMask
public static int getInverseBitRangeMask(int low,
int high)
modulus
public static long[] modulus(long val,
int[] denom)
mult
public static long mult(long[] vals,
int[] denom)
inc
public static void inc(long[] vals,
int[] denom,
int pos)