libquadmath/math/ldexpq.c

   1 /* @(#)s_ldexp.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * Developed at SunPro, a Sun Microsystems, Inc. business.
   7  * Permission to use, copy, modify, and distribute this
   8  * software is freely granted, provided that this notice
   9  * is preserved.
  10  * ====================================================
  11  */
  12
  13 #if defined(LIBM_SCCS) && !defined(lint)
  14 static char rcsid[] = "$NetBSD: s_ldexp.c,v 1.6 1995/05/10 20:47:40 jtc Exp $";
  15 #endif
  16
  17 #include "quadmath-imp.h"
  18
  19 __float128
  20 ldexpq (__float128 value, int exp)
  21 {
  22         if(!finiteq(value)||value==0) return value + value;
  23         value = scalbnq(value,exp);
  24         if(!finiteq(value)||value==0) errno = ERANGE;
  25         return value;
  26 }
  27
  28
  29
  30
  31
  32 /* Note, versioning issues are punted to ldbl-opt in this case.  */