Lucene.Net.Util.SmallFloat Class Reference

Floating point numbers smaller than 32 bits. More...

Static Public Member Functions
static sbyte	FloatToByte (float f, int numMantissaBits, int zeroExp)
	Converts a 32 bit float to an 8 bit float. Values less than zero are all mapped to zero. Values are truncated (rounded down) to the nearest 8 bit value. Values between zero and the smallest representable value are rounded up.
static float	ByteToFloat (byte b, int numMantissaBits, int zeroExp)
	Converts an 8 bit float to a 32 bit float.
static sbyte	FloatToByte315 (float f)
	floatToByte(b, mantissaBits=3, zeroExponent=15) smallest non-zero value = 5.820766E-10 largest value = 7.5161928E9 epsilon = 0.125
static float	Byte315ToFloat (byte b)
	byteToFloat(b, mantissaBits=3, zeroExponent=15)
static sbyte	FloatToByte52 (float f)
	floatToByte(b, mantissaBits=5, zeroExponent=2) smallest nonzero value = 0.033203125 largest value = 1984.0 epsilon = 0.03125
static float	Byte52ToFloat (byte b)
	byteToFloat(b, mantissaBits=5, zeroExponent=2)

Detailed Description

Floating point numbers smaller than 32 bits.

<version> $Id$ </version>

Definition at line 29 of file SmallFloat.cs.

Member Function Documentation

static float Lucene.Net.Util.SmallFloat.Byte315ToFloat ( byte  b )

static

byteToFloat(b, mantissaBits=3, zeroExponent=15)

Definition at line 108 of file SmallFloat.cs.

static float Lucene.Net.Util.SmallFloat.Byte52ToFloat ( byte  b )

static

byteToFloat(b, mantissaBits=5, zeroExponent=2)

Definition at line 141 of file SmallFloat.cs.

static float Lucene.Net.Util.SmallFloat.ByteToFloat ( byte  b, int  numMantissaBits, int  zeroExp  )

static

Converts an 8 bit float to a 32 bit float.

Definition at line 69 of file SmallFloat.cs.

static sbyte Lucene.Net.Util.SmallFloat.FloatToByte ( float  f, int  numMantissaBits, int  zeroExp  )

static

Converts a 32 bit float to an 8 bit float.
Values less than zero are all mapped to zero.
Values are truncated (rounded down) to the nearest 8 bit value.
Values between zero and the smallest representable value are rounded up.

Parameters

f	the 32 bit float to be converted to an 8 bit float (byte)
numMantissaBits	the number of mantissa bits to use in the byte, with the remainder to be used in the exponent
zeroExp	the zero-point in the range of exponent values

Returns

the 8 bit float representation

Definition at line 47 of file SmallFloat.cs.

static sbyte Lucene.Net.Util.SmallFloat.FloatToByte315 ( float  f )

static

floatToByte(b, mantissaBits=3, zeroExponent=15)
smallest non-zero value = 5.820766E-10
largest value = 7.5161928E9
epsilon = 0.125

Definition at line 92 of file SmallFloat.cs.

static sbyte Lucene.Net.Util.SmallFloat.FloatToByte52 ( float  f )

static

floatToByte(b, mantissaBits=5, zeroExponent=2)
smallest nonzero value = 0.033203125
largest value = 1984.0
epsilon = 0.03125

Definition at line 125 of file SmallFloat.cs.

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The documentation for this class was generated from the following file:

• core/Util/SmallFloat.cs