org.apache.lucene.util
public class SmallFloat extends Object
Version: $Id$
Method Summary | |
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static float | byte315ToFloat(byte b) byteToFloat(b, mantissaBits=3, zeroExponent=15) |
static float | byte52ToFloat(byte b) byteToFloat(b, mantissaBits=5, zeroExponent=2) |
static float | byteToFloat(byte b, int numMantissaBits, int zeroExp) Converts an 8 bit float to a 32 bit float. |
static byte | floatToByte(float f, int numMantissaBits, int zeroExp) Converts a 32 bit float to an 8 bit float.
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static byte | floatToByte315(float f) floatToByte(b, mantissaBits=3, zeroExponent=15)
smallest non-zero value = 5.820766E-10 largest value = 7.5161928E9 epsilon = 0.125 |
static byte | floatToByte52(float f) floatToByte(b, mantissaBits=5, zeroExponent=2)
smallest nonzero value = 0.033203125 largest value = 1984.0 epsilon = 0.03125 |
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