| /* s_isnanf.c -- float version of s_isnan.c. |
| * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
| */ |
| |
| /* |
| * ==================================================== |
| * Copyright (C) 1993, 2011 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. |
| * ==================================================== |
| */ |
| |
| #if defined(LIBM_SCCS) && !defined(lint) |
| static char rcsid[] = "$NetBSD: s_isnanf.c,v 1.4 1995/05/10 20:47:38 jtc Exp $"; |
| #endif |
| |
| /* |
| * isnanf(x) returns 1 is x is nan, else 0; |
| * no branching! |
| */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| |
| #undef __isnanf |
| int __isnanf(float x) |
| { |
| int32_t ix; |
| GET_FLOAT_WORD(ix,x); |
| ix &= 0x7fffffff; |
| ix = 0x7f800000 - ix; |
| return (int)(((u_int32_t)(ix))>>31); |
| } |
| hidden_def (__isnanf) |
| weak_alias (__isnanf, isnanf) |
