sysdeps/libm-ieee754/w_log10l.c

   1 /* w_log10l.c -- long double version of w_log10.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 #if defined(LIBM_SCCS) && !defined(lint)
  18 static char rcsid[] = "$NetBSD: $";
  19 #endif
  20
  21 /*
  22  * wrapper log10l(X)
  23  */
  24
  25 #include "math.h"
  26 #include "math_private.h"
  27
  28
  29 #ifdef __STDC__
  30         long double __log10l(long double x)     /* wrapper log10l */
  31 #else
  32         long double __log10l(x)                 /* wrapper log10l */
  33         long double x;
  34 #endif
  35 {
  36 #ifdef _IEEE_LIBM
  37         return __ieee754_log10l(x);
  38 #else
  39         long double z;
  40         z = __ieee754_log10l(x);
  41         if(_LIB_VERSION == _IEEE_ || __isnanl(x)) return z;
  42         if(x<=0.0) {
  43             if(x==0.0)
  44                 return __kernel_standard(x,x,218); /* log10(0) */
  45             else
  46                 return __kernel_standard(x,x,219); /* log10(x<0) */
  47         } else
  48             return z;
  49 #endif
  50 }
  51 weak_alias (__log10l, log10l)