/* * ==================================================== * 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. * ==================================================== */ /* * isnan(x) returns 1 is x is nan, else 0; * no branching! */ #include "math.h" #include "math_private.h" int __isnan(double x) { int32_t hx,lx; EXTRACT_WORDS(hx,lx,x); hx &= 0x7fffffff; hx |= (u_int32_t)(lx|(-lx))>>31; hx = 0x7ff00000 - hx; return (int)(((u_int32_t)hx)>>31); } libm_hidden_def(__isnan)
