/* $Xorg: difloat.c,v 1.3 2000/08/17 19:47:30 cpqbld Exp $ */
/**** module difloat.c ****/
/******************************************************************************

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				NOTICE
                              
This software is being provided by AGE Logic, Inc. under the
following license.  By obtaining, using and/or copying this software,
you agree that you have read, understood, and will comply with these
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     Permission to use, copy, modify, distribute and sell this
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     "Copyright 1993, 1994 by AGE Logic, Inc."
     
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*******************************************************************************

	difloat.c - float converters

	Ben Fahy          -- AGE Logic, Inc. December 1992
	Robert NC Shelley -- AGE Logic, Inc. April 1993

******************************************************************************/
/* $XFree86: xc/programs/Xserver/XIE/dixie/request/difloat.c,v 1.7 2001/01/17 22:12:55 dawes Exp $ */

#ifndef XIE_IEEE_IS_NATIVE
#define _XIEC_DIFLOAT

/*
 *  Include files
 */
  /*
   *  Core X Includes
   */
#include <Xproto.h>
  /*
   *  Server XIE Includes
   */
#include <difloat.h>
#include <misc.h>
#include "macro.h"

double ConvertIEEEtoNative(CARD32 ieee)
{
  double sign;
  double exponent;
  double fraction;
  
  if(!(ieee & 0x7fffffff)) return(0.0);
  
  sign     = (ieee & ieeeFloatSignMask) == ieeeFloatSignMask ? -1.0 : 1.0;
  exponent = (int)((ieee & ieeeFloatExpMask) >> ieeeFloatExpShift) - 127;
  fraction = (double)(ieee & ieeeFloatMantissaMask) / (1 << ieeeMantissaSize);
  
  return(sign * pow(2.0,exponent) * (1.0 + fraction));
}                               /* end ConvertIEEEtoNative */
#endif /* !XIE_IEEE_IS_NATIVE */

/* end module difloat.c */
