math/w_exp10.c

   1 /* @(#)w_exp10.c
   2  * Conversion to exp10 by Ulrich Drepper <drepper@cygnus.com>.
   3  */
   4
   5 /*
   6  * ====================================================
   7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   8  *
   9  * Developed at SunPro, a Sun Microsystems, Inc. business.
  10  * Permission to use, copy, modify, and distribute this
  11  * software is freely granted, provided that this notice
  12  * is preserved.
  13  * ====================================================
  14  */
  15
  16 /*
  17  * wrapper exp10(x)
  18  */
  19
  20 #include <math.h>
  21 #include "math_private.h"
  22
  23 #ifdef __STDC__
  24         double __exp10(double x)                /* wrapper exp10 */
  25 #else
  26         double __exp10(x)                       /* wrapper exp10 */
  27         double x;
  28 #endif
  29 {
  30 #ifdef _IEEE_LIBM
  31         return __ieee754_exp10(x);
  32 #else
  33         double z;
  34         z = __ieee754_exp10(x);
  35         if(_LIB_VERSION == _IEEE_) return z;
  36         if(!__finite(z) && __finite(x)) {
  37             /* exp10 overflow (46) if x > 0, underflow (47) if x < 0.  */
  38             return __kernel_standard(x,x,46+!!__signbit(x));
  39         }
  40         return z;
  41 #endif
  42 }
  43 weak_alias (__exp10, exp10)
  44 strong_alias (__exp10, __pow10)
  45 weak_alias (__pow10, pow10)
  46 #ifdef NO_LONG_DOUBLE
  47 strong_alias (__exp10, __exp10l)
  48 weak_alias (__exp10, exp10l)
  49 strong_alias (__exp10l, __pow10l)
  50 weak_alias (__pow10l, pow10l)
  51 #endif