math/s_ldexpl.c

   1 /* s_ldexpl.c -- long double version of s_ldexp.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 #include <math.h>
  22 #include <math_private.h>
  23 #include <errno.h>
  24
  25 long double __ldexpl(long double value, int exp)
  26 {
  27         if(!isfinite(value)||value==0.0) return value;
  28         value = __scalbnl(value,exp);
  29         if(!isfinite(value)||value==0.0) __set_errno (ERANGE);
  30         return value;
  31 }
  32 weak_alias (__ldexpl, ldexpl)
  33 weak_alias (__ldexpl, scalbnl)