src/include/float_emul.h

#ifndef FLOAT_EMUL_H
#define FLOAT_EMUL_H

/*
 *  Copyright (C) 2005-2007  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE   
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *
 *  $Id: float_emul.h,v 1.4 2006/12/30 13:31:01 debug Exp $
 *
 *  Floating point emulation. See src/float_emul.c for the details.
 */

#include <math.h>

#include "misc.h"

struct ieee_float_value {
        double          f;
        int             nan;
};

#define IEEE_FMT_S              1       /*  single, 32-bit float  */
#define IEEE_FMT_D              2       /*  double, 64-bit float  */
#define IEEE_FMT_W              3       /*  word, 32-bit integer  */
#define IEEE_FMT_L              4       /*  long, 64-bit integer  */

void ieee_interpret_float_value(uint64_t x, struct ieee_float_value *fvp,
        int fmt);
uint64_t ieee_store_float_value(double nf, int fmt, int nan);

#endif  /*  FLOAT_EMUL_H  */
1	#ifndef FLOAT_EMUL_H
2	#define FLOAT_EMUL_H
3
4	/*
5	* Copyright (C) 2005-2007 Anders Gavare. All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without
8	* modification, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.
15	* 3. The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.
17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28	* SUCH DAMAGE.
29	*
30	* $Id: float_emul.h,v 1.4 2006/12/30 13:31:01 debug Exp $
31	*
32	* Floating point emulation. See src/float_emul.c for the details.
33	*/
34
35	#include <math.h>
36
37	#include "misc.h"
38
39	struct ieee_float_value {
40	double f;
41	int nan;
42	};
43
44	#define IEEE_FMT_S 1 /* single, 32-bit float */
45	#define IEEE_FMT_D 2 /* double, 64-bit float */
46	#define IEEE_FMT_W 3 /* word, 32-bit integer */
47	#define IEEE_FMT_L 4 /* long, 64-bit integer */
48
49	void ieee_interpret_float_value(uint64_t x, struct ieee_float_value *fvp,
50	int fmt);
51	uint64_t ieee_store_float_value(double nf, int fmt, int nan);
52
53	#endif /* FLOAT_EMUL_H */