1/*
2 * wrapper exp2f(x)
3 */
4
5#include <float.h>
6#include "math.h"
7#include "math_private.h"
8
9static const float o_threshold= (float) FLT_MAX_EXP;
10static const float u_threshold= (float) (FLT_MIN_EXP - FLT_MANT_DIG - 1);
11
12float
13__exp2f (float x)		/* wrapper exp2f */
14{
15#ifdef _IEEE_LIBM
16  return __ieee754_exp2f (x);
17#else
18  float z;
19  z = __ieee754_exp2f (x);
20  if (_LIB_VERSION != _IEEE_ && __finitef (x))
21    {
22      if (x > o_threshold)
23	/* exp2 overflow */
24	return (float) __kernel_standard ((double) x, (double) x, 144);
25      else if (x <= u_threshold)
26	/* exp2 underflow */
27	return (float) __kernel_standard ((double) x, (double) x, 145);
28    }
29  return z;
30#endif
31}
32weak_alias (__exp2f, exp2f)
33