frexpf man page on OpenDarwin

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```FREXP(3)		 BSD Library Functions Manual		      FREXP(3)

NAME
frexp — break floating-point number into normalized fraction and power of
2

SYNOPSIS
#include <math.h>

double
frexp(double value, int *exp);

float
frexpf(float value, int *exp);

DESCRIPTION
The frexp() and frexpf() functions break the floating-point number value
into a normalized fraction and an integral power of 2. They store the
integer in the int object pointed to by exp.

The functions return a number x such that x has a magnitude in the inter‐
val [1/2, 1) or 0, and value = x*(2**exp).

SPECIAL VALUES
frexp(�0, exp) returns �0, and stores 0 in the object pointed to by exp.

frexp(�infinity, exp) returns �infinity, and stores an unspecified value
in the object pointed to by exp.

frexp(Nan, exp) returns a Nan, and stores an unspecified value in the
object pointed to by exp.

math(3), scalbn

STANDARDS
The frexp() and frexpf() functions conform to ISO/IEC 9899:1999(E).

BSD			       January 30, 2003				   BSD
```
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