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# define TGSOURCE "logb.c"
#include "_tgmath.h"
#include <math.h>
#include "fenv.h"
TYPE TGFN(logb)(TYPE x)
{
switch (fpclassify(x)) {
case FP_ZERO: feraiseexcept(FE_DIVBYZERO); return - INFINITY;
case FP_INFINITE: return x;
default: break;
}
return x;
}
/*
STDC(199901)
XOPEN(400)
LINK(m)
*/
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