mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
32 lines
698 B
C
32 lines
698 B
C
/*
|
|
* wrapper exp2l(x)
|
|
*/
|
|
|
|
#include <float.h>
|
|
#include <math.h>
|
|
#include "math_private.h"
|
|
|
|
static const long double o_threshold = (long double) LDBL_MAX_EXP;
|
|
static const long double u_threshold
|
|
= (long double) (LDBL_MIN_EXP - LDBL_MANT_DIG - 1);
|
|
|
|
long double
|
|
__exp2l (long double x) /* wrapper exp2l */
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_exp2l (x);
|
|
#else
|
|
long double z;
|
|
z = __ieee754_exp2l (x);
|
|
if (_LIB_VERSION != _IEEE_ && __finitel (x))
|
|
{
|
|
if (x > o_threshold)
|
|
return __kernel_standard (x, x, 244); /* exp2l overflow */
|
|
else if (x <= u_threshold)
|
|
return __kernel_standard (x, x, 245); /* exp2l underflow */
|
|
}
|
|
return z;
|
|
#endif
|
|
}
|
|
weak_alias (__exp2l, exp2l)
|