mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/* w_exp10f.c -- float version of w_exp10.c.
|
|
* Conversion to exp10 by Ulrich Drepper <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.
|
|
* ====================================================
|
|
*/
|
|
|
|
/*
|
|
* wrapper expf10(x)
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#ifdef __STDC__
|
|
static const float
|
|
#else
|
|
static float
|
|
#endif
|
|
o_threshold= 3.853183944498959298709e+01,
|
|
u_threshold= -4.515449934959717928174e+01;
|
|
|
|
#ifdef __STDC__
|
|
float __exp10f(float x) /* wrapper exp10f */
|
|
#else
|
|
float __exp10f(x) /* wrapper exp10f */
|
|
float x;
|
|
#endif
|
|
{
|
|
#ifdef _IEEE_LIBM
|
|
return __ieee754_exp10f(x);
|
|
#else
|
|
float z;
|
|
z = __ieee754_exp10f(x);
|
|
if(_LIB_VERSION == _IEEE_) return z;
|
|
if(__finitef(x)) {
|
|
if(x>o_threshold)
|
|
/* exp overflow */
|
|
return (float)__kernel_standard((double)x,(double)x,146);
|
|
else if(x<u_threshold)
|
|
/* exp underflow */
|
|
return (float)__kernel_standard((double)x,(double)x,147);
|
|
}
|
|
return z;
|
|
#endif
|
|
}
|
|
weak_alias (__exp10f, exp10f)
|
|
strong_alias (__exp10f, __pow10f)
|
|
weak_alias (__pow10f, pow10f)
|