math/w_exp10l.c

   1 /* w_exp10l.c -- long double version of w_exp10.c.
   2  * Conversion to long double by Ulrich Drepper,
   3  * Cygnus Support, drepper@cygnus.com.
   4  */
   5
   6 /*
   7  * ====================================================
   8  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   9  *
  10  * Developed at SunPro, a Sun Microsystems, Inc. business.
  11  * Permission to use, copy, modify, and distribute this
  12  * software is freely granted, provided that this notice
  13  * is preserved.
  14  * ====================================================
  15  */
  16
  17 /*
  18  * wrapper exp10l(x)
  19  */
  20
  21 #include "math.h"
  22 #include "math_private.h"
  23
  24 #ifdef __STDC__
  25 static const long double
  26 #else
  27 static long double
  28 #endif
  29 o_threshold=  4.93207544895866790234755e+03,
  30 u_threshold= -4.95104033868549871764588e+03;
  31
  32 #ifdef __STDC__
  33         long double __exp10l(long double x)     /* wrapper exp10 */
  34 #else
  35         long double __exp10l(x)                 /* wrapper exp10 */
  36         long double x;
  37 #endif
  38 {
  39 #ifdef _IEEE_LIBM
  40         return __ieee754_exp10l(x);
  41 #else
  42         long double z;
  43         z = __ieee754_exp10l(x);
  44         if(_LIB_VERSION == _IEEE_) return z;
  45         if(__finitel(x)) {
  46             if(x>o_threshold)
  47                 return __kernel_standard(x,x,246); /* exp10 overflow */
  48             else if(x<u_threshold)
  49                 return __kernel_standard(x,x,247); /* exp10 underflow */
  50         }
  51         return z;
  52 #endif
  53 }
  54 weak_alias (__exp10l, exp10l)
  55 strong_alias (__exp10l, __pow10l)
  56 weak_alias (__pow10l, pow10l)