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 #ifdef __STDC__
  25         float __ldexpf(float value, int exp)
  26 #else
  27         float __ldexpf(value, exp)
  28         float value; int exp;
  29 #endif
  30 {
  31         if(!__finitef(value)||value==(float)0.0) return value;
  32         value = __scalbnf(value,exp);
  33         if(!__finitef(value)||value==(float)0.0) __set_errno (ERANGE);
  34         return value;
  35 }
  36 INTDEF(__ldexpf)
  37 weak_alias (__ldexpf, ldexpf)