/* * ==================================================== * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. * * Developed at SunPro, a Sun Microsystems, Inc. business. * Permission to use, copy, modify, and distribute this * software is freely granted, provided that this notice * is preserved. * ==================================================== */ /* * finite(x) returns 1 is x is finite, else 0; * no branching! */ #include <features.h> /* Prevent math.h from defining a colliding inline */ #undef __USE_EXTERN_INLINES #include "math.h" #include "math_private.h" int __finite(double x) { u_int32_t hx; GET_HIGH_WORD(hx, x); /* Finite numbers have at least one zero bit in exponent. */ /* All other numbers will result in 0xffffffff after OR: */ return (hx | 0x800fffff) != 0xffffffff; } libm_hidden_def(__finite)