frexp#

Synopsis#

#include <math.h>

double frexp(double num, int *exp);

float frexpf(float num, int *exp);

Status#

Partially implemented

Conformance#

IEEE Std 1003.1-2017

Description#

The purpose is to extract mantissa and exponent from a double precision number. These functions shall break a floating-point number num into a normalized fraction and an integral power of 2. The integer exponent shall be stored in the int object pointed to by exp.

Return value#

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

If num is NaN, a NaN shall be returned, and the value of *exp is unspecified.
If num is ±0, ±0 shall be returned, and the value of *exp shall be 0.
If num is ±Inf, num shall be returned, and the value of *exp is unspecified.

Errors#

No errors are defined.

Tests#

Untested

Known bugs#

None