1 /* wf_exp2.c -- float version of w_exp2.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  * wrapper exp2f(x)
18  */
19 
20 #include "fdlibm.h"
21 #include <errno.h>
22 #include <math.h>
23 
24 #ifdef __STDC__
exp2f(float x)25 	float exp2f(float x)		/* wrapper exp2f */
26 #else
27 	float exp2f(x)			/* wrapper exp2f */
28 	float x;
29 #endif
30 {
31   return powf(2.0, x);
32 }
33 
34 #ifdef _DOUBLE_IS_32BITS
35 
36 #ifdef __STDC__
exp2(double x)37 	double exp2(double x)
38 #else
39 	double exp2(x)
40 	double x;
41 #endif
42 {
43 	return (double) exp2f((float) x);
44 }
45 
46 #endif /* defined(_DOUBLE_IS_32BITS) */
47