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  1. /* sf_ldexp.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. #include "fdlibm.h"
  17. #include <errno.h>
  18.  
  19. #ifdef __STDC__
  20.         float ldexpf(float value, int exp)
  21. #else
  22.         float ldexpf(value, exp)
  23.         float value; int exp;
  24. #endif
  25. {
  26.         if(!finitef(value)||value==(float)0.0) return value;
  27.         value = scalbnf(value,exp);
  28.         if(!finitef(value)||value==(float)0.0) errno = ERANGE;
  29.         return value;
  30. }
  31.  
  32. #ifdef _DOUBLE_IS_32BITS
  33.  
  34. #ifdef __STDC__
  35.         double ldexp(double value, int exp)
  36. #else
  37.         double ldexp(value, exp)
  38.         double value; int exp;
  39. #endif
  40. {
  41.         return (double) ldexpf((float) value, exp);
  42. }
  43.  
  44. #endif /* defined(_DOUBLE_IS_32BITS) */
  45.