s_finitef.c revision 2116 
1/* s_finitef.c -- float version of s_finite.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#ifndef lint
17static char rcsid[] = "$Id: s_finitef.c,v 1.2 1994/08/18 23:06:45 jtc Exp $";
18#endif
19
20/*
21 * finitef(x) returns 1 is x is finite, else 0;
22 * no branching!
23 */
24
25#include "math.h"
26#include "math_private.h"
27
28#ifdef __STDC__
29	int finitef(float x)
30#else
31	int finitef(x)
32	float x;
33#endif
34{
35	int32_t ix;
36	GET_FLOAT_WORD(ix,x);
37	return (int)((u_int32_t)((ix&0x7fffffff)-0x7f800000)>>31);
38}
39