lib/libm/src/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  * $NetBSD: s_ldexpf.c,v 1.6 2002/05/26 22:01:57 wiz Exp $
  16  * $DragonFly: src/lib/libm/src/s_ldexpf.c,v 1.1 2005/07/26 21:15:20 joerg Exp $
  17  */
  18
  19 #include <math.h>
  20 #include "math_private.h"
  21 #include <errno.h>
  22
  23 float
  24 ldexpf(float value, int expo)
  25 {
  26         if(!finitef(value)||value==(float)0.0) return value;
  27         value = scalbnf(value,expo);
  28         if(!finitef(value)||value==(float)0.0) errno = ERANGE;
  29         return value;
  30 }