iFloat.h

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#ifndef __IFLOAT_H__
#define __IFLOAT_H__

/*
 * iFloat.h - header for simple floating point functions.
 *
 * "Copyright (c) 2017 by Fritz Sieker."
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written
 * agreement is hereby granted, provided that the above copyright notice
 * and the following two paragraphs appear in all copies of this software.
 *
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE AUTHOR
 * HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * THE AUTHOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
 * BASIS, AND THE AUTHOR NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 */

#define HALF
#ifdef HALF
typedef short iFloat_t;

#define BITS      16
#define BITS_EXP   5
#define BITS_MANT 10
#define EXP_BIAS  15

#else
typedef int iFloat_t;

#define BITS      32
#define BITS_EXP   8
#define BITS_MANT 23
#define EXP_BIAS  127

#endif

iFloat_t floatGetSign (iFloat_t x);

iFloat_t floatGetExp (iFloat_t x);

iFloat_t floatGetVal (iFloat_t x);

void floatGetAll(iFloat_t x, iFloat_t* sign, iFloat_t*exp, iFloat_t* val);

iFloat_t floatLeftMost1 (iFloat_t bits);

iFloat_t floatAbs (iFloat_t x);

iFloat_t floatNegate (iFloat_t x);

iFloat_t floatAdd (iFloat_t x, iFloat_t y);

iFloat_t floatSub (iFloat_t x, iFloat_t y);

#endif