blob: d868264f7145a977dafc9ee147fe6b4917affe6c [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -07001/* 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/*
17 * isnanf(x) returns 1 is x is nan, else 0;
18 * no branching!
19 */
20
21#include "math.h"
22#include "math_private.h"
23
24int __isnanf(float x)
25{
26 int32_t ix;
27 GET_FLOAT_WORD(ix,x);
28 ix &= 0x7fffffff;
29 ix = 0x7f800000 - ix;
30 return (int)(((u_int32_t)(ix))>>31);
31}
32libm_hidden_def(__isnanf)