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# define TGSOURCE "atanh.c"
#include "_tgmath.h"
#include <math.h>
#include "fenv.h"
TYPE TGFN(atanh)(TYPE x)
{
if (fpclassify(x) == FP_ZERO) {
return x;
}
if (TGFN(fabs)(x) == 1.0) {
feraiseexcept(FE_DIVBYZERO);
return copysign(INFINITY, x);
}
if (TGFN(fabs)(x) > 1.0) {
feraiseexcept(FE_INVALID);
return NAN;
}
return x;
}
/*
STDC(199901)
XOPEN(400)
LINK(m)
*/
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