math/w_expl_compat.c

   1 /* w_expl.c -- long double version of w_exp.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 expl(x)
  23  */
  24
  25 #include <math.h>
  26 #include <math_private.h>
  27 #include <math-svid-compat.h>
  28 #include <libm-alias-ldouble.h>
  29
  30 #if LIBM_SVID_COMPAT
  31 long double __expl(long double x)       /* wrapper exp */
  32 {
  33 # ifdef _IEEE_LIBM
  34         return __ieee754_expl(x);
  35 # else
  36         long double z = __ieee754_expl (x);
  37         if (__glibc_unlikely (!isfinite (z) || z == 0)
  38             && isfinite (x) && _LIB_VERSION != _IEEE_)
  39           return __kernel_standard_l (x, x, 206 + !!signbit (x));
  40
  41         return z;
  42 # endif
  43 }
  44 libm_hidden_def (__expl)
  45 libm_alias_ldouble (__exp, exp)
  46 #endif