1/*
2 * wrapper exp2(x)
3 */
4
5#include <math.h>
6#include <math_private.h>
7#include <math-svid-compat.h>
8#include <libm-alias-double.h>
9
10#if LIBM_SVID_COMPAT
11double
12__exp2 (double x)
13{
14 double z = __ieee754_exp2 (x);
15 if (__builtin_expect (!isfinite (z) || z == 0, 0)
16 && isfinite (x) && _LIB_VERSION != _IEEE_)
17 /* exp2 overflow: 44, exp2 underflow: 45 */
18 return __kernel_standard (x, x, 44 + !!signbit (x));
19
20 return z;
21}
22libm_alias_double (__exp2, exp2)
23#endif
24