summaryrefslogtreecommitdiff
path: root/newlib/libm/common/sf_finite.c
blob: 4c48f400fdf7d0ed5de4c656c434c8d36461a938 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
/* sf_finite.c -- float version of s_finite.c.
 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
 */

/*
 * ====================================================
 * Copyright (C) 1993 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.
 * ====================================================
 */

/*
 * finitef(x) returns 1 is x is finite, else 0;
 * no branching!
 */

#include "fdlibm.h"

#ifdef __STDC__
	int finitef(float x)
#else
	int finitef(x)
	float x;
#endif
{
	__int32_t ix;
	GET_FLOAT_WORD(ix,x);
	return  (int)((__uint32_t)((ix&0x7fffffff)-0x7f800000)>>31);
}

#ifdef _DOUBLE_IS_32BITS

#ifdef __STDC__
	int finite(double x)
#else
	int finite(x)
	double x;
#endif
{
	return finitef((float) x);
}

#endif /* defined(_DOUBLE_IS_32BITS) */