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#include <float.h> // for LDBL_MANT_DIG, LDBL_MAX_EXP
#include <math.h> // for signbit, fmaxl, isnan
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double fmaxl(long double x, long double y)
{
return fmax(x, y);
}
#else
long double fmaxl(long double x, long double y)
{
if (isnan(x))
return y;
if (isnan(y))
return x;
/* handle signed zeros, see C99 Annex F.9.9.2 */
if (signbit(x) != signbit(y))
return signbit(x) ? y : x;
return x < y ? y : x;
}
#endif
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