com.io7m.ieee754b16

Class Binary32

java.lang.Object

com.io7m.ieee754b16.Binary32

public final class Binary32
extends Object

Utility functions related to the binary32 format specified in IEEE 754 2008.

Method Summary

Modifier and Type	Method and Description
static int	unpackGetExponentUnbiased(float d) Extract and unbias the exponent of the given packed float value.
static int	unpackGetSign(float d) Retrieve the sign bit of the given floating point value, as an integer.
static int	unpackGetSignificand(float d) Return the significand of the given floating point value as an integer.

Methods inherited from class java.lang.Object

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

Method Detail

unpackGetExponentUnbiased

public static int unpackGetExponentUnbiased(float d)

Extract and unbias the exponent of the given packed float value.

The exponent is encoded biased as a number in the range [0, 255], with 0 indicating that the number is subnormal and [1, 254] denoting the actual exponent plus BIAS. Infinite and NaN values always have a biased exponent of 255.

This function will therefore return:

• 0 - BIAS = -127 iff the input is a subnormal number.
• An integer in the range [1 - BIAS, 254 - BIAS] = [-126, 127] iff the input is a normal number.
• 255 - BIAS = 128 iff the input is Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY, or NaN.

Parameters:

d - A floating point value

Returns:

An unbiased exponent

unpackGetSign

public static int unpackGetSign(float d)

Retrieve the sign bit of the given floating point value, as an integer.

Parameters:

d - A floating point value

Returns:

An unpacked sign bit

unpackGetSignificand

public static int unpackGetSignificand(float d)

Return the significand of the given floating point value as an integer.

Parameters:

d - A floating point value

Returns:

An unpacked significand

See Also:

Binary16.packSetSignificandUnchecked(int)