Atlas - s_isnanf.c
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[FILE BEGIN]
1#include "SDL_internal.h"
2/* s_isnanf.c -- float version of s_isnan.c.
3 * Conversion to float by Ian Lance Taylor, Cygnus Support, [email protected].
4 */
5
6/*
7 * ====================================================
8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 *
10 * Developed at SunPro, a Sun Microsystems, Inc. business.
11 * Permission to use, copy, modify, and distribute this
12 * software is freely granted, provided that this notice
13 * is preserved.
14 * ====================================================
15 */
16
17/*
18 * isnanf(x) returns 1 is x is nan, else 0;
19 * no branching!
20 */
21
22#include "math.h"
23#include "math_private.h"
24
25int __isnanf(float x)
26{
27	int32_t ix;
28	GET_FLOAT_WORD(ix,x);
29	ix &= 0x7fffffff;
30	ix = 0x7f800000 - ix;
31	return (int)(((u_int32_t)(ix))>>31);
32}
33libm_hidden_def(__isnanf)
34
[FILE END]
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