1*1e651e1eSRoland Levillain 2*1e651e1eSRoland Levillain /* @(#)s_finite.c 1.3 95/01/18 */ 3*1e651e1eSRoland Levillain /* 4*1e651e1eSRoland Levillain * ==================================================== 5*1e651e1eSRoland Levillain * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 6*1e651e1eSRoland Levillain * 7*1e651e1eSRoland Levillain * Developed at SunSoft, a Sun Microsystems, Inc. business. 8*1e651e1eSRoland Levillain * Permission to use, copy, modify, and distribute this 9*1e651e1eSRoland Levillain * software is freely granted, provided that this notice 10*1e651e1eSRoland Levillain * is preserved. 11*1e651e1eSRoland Levillain * ==================================================== 12*1e651e1eSRoland Levillain */ 13*1e651e1eSRoland Levillain 14*1e651e1eSRoland Levillain /* 15*1e651e1eSRoland Levillain * ieee_finite(x) returns 1 is x is finite, else 0; 16*1e651e1eSRoland Levillain * no branching! 17*1e651e1eSRoland Levillain */ 18*1e651e1eSRoland Levillain 19*1e651e1eSRoland Levillain #include "fdlibm.h" 20*1e651e1eSRoland Levillain 21*1e651e1eSRoland Levillain #ifdef __STDC__ ieee_finite(double x)22*1e651e1eSRoland Levillain int ieee_finite(double x) 23*1e651e1eSRoland Levillain #else 24*1e651e1eSRoland Levillain int ieee_finite(x) 25*1e651e1eSRoland Levillain double x; 26*1e651e1eSRoland Levillain #endif 27*1e651e1eSRoland Levillain { 28*1e651e1eSRoland Levillain int hx; 29*1e651e1eSRoland Levillain hx = __HI(x); 30*1e651e1eSRoland Levillain return (unsigned)((hx&0x7fffffff)-0x7ff00000)>>31; 31*1e651e1eSRoland Levillain } 32