Frexp - Analog Devices VISUALDSP++ 3.5 Manual

C Run-Time Library Reference

frexp

separate fraction and exponent
Synopsis
#include <math.h>
double frexp(double f, int *expptr);
float frexpf(float f, int *expptr);
Description
The function separates a floating-point input into a normalized
frexp
fraction and a (base 2) exponent. The function returns the first argument
as a fraction in the interval [½, 1), and stores a power of 2 in the integer
pointed to by the second argument. If the input is zero, then the fraction
and exponent will both be set to zero.
Error Conditions
The function does not return an error condition.
frexp
Example
#include <math.h>
double y;
int exponent;
y = frexp(2.0, &exponent);
See Also
modf
3-62 VisualDSP++ 3.5 C/C++ Compiler and Library Manual
/* y=0.5, exponent=2 */
for ADSP-219x DSPs