cosmopolitan/libc/math/fmaxl.c

21 lines
401 B
C

#include "libc/math/math.h"
#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