logb.c File Reference

#include "libm.h"

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Functions
double	logb (double x)

Function Documentation

logb()

double logb

(

double

x

)

Definition at line 20 of file logb.c.

{
    if (!isfinite(x))
        return x * x;
    if (x == 0)
        return -1/(x*x);
    return ilogb(x);
}

Referenced by _logb(), and _logbf().