1 /* s_isnanf.c -- float version of s_isnan.c. 2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. 3 */ 4 5 /* 6 * ==================================================== 7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 8 * 9 * Developed at SunPro, a Sun Microsystems, Inc. business. 10 * Permission to use, copy, modify, and distribute this 11 * software is freely granted, provided that this notice 12 * is preserved. 13 * ==================================================== 14 */ 15 16 #include <sys/cdefs.h> 17 #if defined(LIBM_SCCS) && !defined(lint) 18 __RCSID("$NetBSD: s_isnanf.c,v 1.7 2002/05/26 22:01:56 wiz Exp $"); 19 #endif 20 21 /* 22 * isnanf(x) returns 1 is x is nan, else 0; 23 * no branching! 24 */ 25 26 #include "math.h" 27 #include "math_private.h" 28 29 int 30 isnanf(float x) 31 { 32 int32_t ix; 33 GET_FLOAT_WORD(ix,x); 34 ix &= 0x7fffffff; 35 ix = 0x7f800000 - ix; 36 return (int)(((u_int32_t)(ix))>>31); 37 } 38