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 1.5 1997/10/09 11:32:30 lukem 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 #ifdef __STDC__ 30 int isnanf(float x) 31 #else 32 int isnanf(x) 33 float x; 34 #endif 35 { 36 int32_t ix; 37 GET_FLOAT_WORD(ix,x); 38 ix &= 0x7fffffff; 39 ix = 0x7f800000 - ix; 40 return (int)(((u_int32_t)(ix))>>31); 41 } 42