mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-16 01:50:11 +00:00
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/* w_expl.c -- long double version of w_exp.c.
|
|
* Conversion to long double by Ulrich Drepper,
|
|
* Cygnus Support, drepper@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: $";
|
|
#endif
|
|
|
|
/*
|
|
* wrapper expl(x)
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#ifdef __STDC__
|
|
static const long double
|
|
#else
|
|
static long double
|
|
#endif
|
|
o_threshold= 1.1356523406294143949491931077970763428449E4L,
|
|
u_threshold= -1.1433462743336297878837243843452621503410E4;
|
|
|
|
#ifdef __STDC__
|
|
long double __expl(long double x) /* wrapper exp */
|
|
#else
|
|
long double __expl(x) /* wrapper exp */
|
|
long double x;
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_expl(x);
|
|
#else
|
|
long double z;
|
|
z = __ieee754_expl(x);
|
|
if(_LIB_VERSION == _IEEE_) return z;
|
|
if(__finitel(x)) {
|
|
if(x>o_threshold)
|
|
return __kernel_standard(x,x,206); /* exp overflow */
|
|
else if(x<u_threshold)
|
|
return __kernel_standard(x,x,207); /* exp underflow */
|
|
}
|
|
return z;
|
|
#endif
|
|
}
|
|
hidden_def (__expl)
|
|
weak_alias (__expl, expl)
|