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#include <limits.h>
#include "libm.h"
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double logbl(long double x)
{
return logb(x);
}
#else
long double logbl(long double x)
{
int i = ilogbl(x);
if (i == FP_ILOGB0)
return -1.0/fabsl(x);
if (i == FP_ILOGBNAN || i == INT_MAX)
return x * x;
return i;
}
#endif
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