[thirdparty/glibc.git] / math / w_exp2f.c

/*
 * wrapper exp2f(x)
 */

#include <float.h>
#include <math.h>
#include <math_private.h>

static const float o_threshold = (float) FLT_MAX_EXP;
static const float u_threshold = (float) (FLT_MIN_EXP - FLT_MANT_DIG - 1);

float
__exp2f (float x)
{
  if (__builtin_expect (x <= u_threshold || x > o_threshold, 0)
      && _LIB_VERSION != _IEEE_ && __finitef (x))
    /* exp2 overflow: 144, exp2 underflow: 145 */
    return __kernel_standard_f (x, x, 144 + (x <= o_threshold));

  return __ieee754_exp2f (x);
}
weak_alias (__exp2f, exp2f)
Commit	Line	Data
650425ce UD	1	/*
	2	* wrapper exp2f(x)
	3	*/
	4
	5	#include <float.h>
9d13fb24	6	#include <math.h>
9277c064	7	#include <math_private.h>
650425ce	8
0ac5ae23 UD	9	static const float o_threshold = (float) FLT_MAX_EXP;
0ac5ae23 UD	10	static const float u_threshold = (float) (FLT_MIN_EXP - FLT_MANT_DIG - 1);
650425ce UD	11
650425ce UD	12	float
0ac5ae23	13	__exp2f (float x)
650425ce	14	{
0ac5ae23 UD	15	if (__builtin_expect (x <= u_threshold \|\| x > o_threshold, 0)
	16	&& _LIB_VERSION != _IEEE_ && __finitef (x))
	17	/* exp2 overflow: 144, exp2 underflow: 145 */
	18	return __kernel_standard_f (x, x, 144 + (x <= o_threshold));
	19
650425ce	20	return __ieee754_exp2f (x);
650425ce UD	21	}
650425ce UD	22	weak_alias (__exp2f, exp2f)