frexp

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Split a floating point number.

Declaration[edit]

genType frexp( genType x, out genIType exp );
genDType frexp( genDType x, out genIType exp );


Parameters[edit]

x - Specifies the value from which significand and exponent are to be extracted.
out exp - Specifies the variable into which to place the exponent


Description[edit]

 frexp extracts x into a floating-point significand in the range [0.5, 1.0) and in integral exponent of two, such that:

 [math]x=significand ⋅ 2^{exponent}[/math] 

The significand is returned by the function and the exponent is returned in the output parameter exp . For a floating-point value of zero, the significand and exponent are both zero. For a floating-point value that is an infinity or a floating-point NaN, the results are undefined.

Version Support[edit]

frexp (genType) 4.0+
frexp (genDType) 4.0+

See Also[edit]

 ldexp 


Copyright[edit]

Copyright© 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.