math/s_ldexpf.c

   1 /* s_ldexpf.c -- float version of s_ldexp.c.
   2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@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 #if defined(LIBM_SCCS) && !defined(lint)
  17 static char rcsid[] = "$NetBSD: s_ldexpf.c,v 1.3 1995/05/10 20:47:42 jtc Exp $";
  18 #endif
  19
  20 #include <math.h>
  21 #include <math_private.h>
  22 #include <errno.h>
  23
  24 float __ldexpf(float value, int exp)
  25 {
  26         if(!isfinite(value)||value==(float)0.0) return value;
  27         value = __scalbnf(value,exp);
  28         if(!isfinite(value)||value==(float)0.0) __set_errno (ERANGE);
  29         return value;
  30 }
  31 weak_alias (__ldexpf, ldexpf)
  32 weak_alias (__ldexpf, scalbnf)