frexp man page on SmartOS

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frexp(3M)		Mathematical Library Functions		     frexp(3M)

       frexp,  frexpf, frexpl - extract mantissa and exponent from a floating-
       point number

       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double frexp(double num, int *exp);

       float frexpf(float num, int *exp);

       long double frexpl(long double num, int *exp);

       These functions break a floating-point number into a  normalized	 frac‐
       tion and an integral power of 2. They store the integer exponent in the
       int object pointed to by exp.

       For finite arguments, these functions return the value x, such  that  x
       is  a double with magnitude in the interval [½, 1) or 0, and num equals
       x times 2 raised to the power *exp.

       If num is NaN, NaN is returned and the value of *exp is unspecified.

       If num is ± 0, ± 0 is returned and the value of *exp is 0.

       If num is ±Inf, num is returned and the value of *exp is unspecified.

       See attributes(5) for descriptions of the following attributes:

       │      ATTRIBUTE TYPE	     │	    ATTRIBUTE VALUE	   │
       │Interface Stability	     │Standard			   │
       │MT-Level		     │MT-Safe			   │

       isnan(3M), ldexp(3M), modf(3M), attributes(5), standards(5)

SunOS 5.11			  12 Jul 2006			     frexp(3M)

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