math/w_exp10f.c

   1 /* w_exp10f.c -- float version of 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 expf10(x)
  18  */
  19
  20 #include <math.h>
  21 #include "math_private.h"
  22
  23 #ifdef __STDC__
  24         float __exp10f(float x)         /* wrapper exp10f */
  25 #else
  26         float __exp10f(x)                       /* wrapper exp10f */
  27         float x;
  28 #endif
  29 {
  30 #ifdef _IEEE_LIBM
  31         return __ieee754_exp10f(x);
  32 #else
  33         float z;
  34         z = __ieee754_exp10f(x);
  35         if(_LIB_VERSION == _IEEE_) return z;
  36         if(!__finitef(z) && __finitef(x)) {
  37             /* exp10f overflow (146) if x > 0, underflow (147) if x < 0.  */
  38             return (float)__kernel_standard((double) x, (double) x,
  39                                             146+!!__signbitf(x));
  40         }
  41         return z;
  42 #endif
  43 }
  44 weak_alias (__exp10f, exp10f)
  45 strong_alias (__exp10f, __pow10f)
  46 weak_alias (__pow10f, pow10f)