WebSVN – HelenOS – Diff – /trunk/uspace/softfloat/include/sftypes.h


/*
 * Copyright (c) 2005 Josef Cejka
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - 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 ``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 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.
 */
 
 /** @addtogroup softfloat 
 * @{
 */
/** @file
 */
 
#ifndef __SFTYPES_H__
#define __SFTYPES_H__
 
#include <endian.h>
#include <stdint.h>
 
typedef union {
    float f;
    uint32_t binary;
 
    struct  {
        #if __BYTE_ORDER == __BIG_ENDIAN
        uint32_t sign:1;
        uint32_t exp:8;
        uint32_t fraction:23;
        #elif __BYTE_ORDER == __LITTLE_ENDIAN
        uint32_t fraction:23;
        uint32_t exp:8;
        uint32_t sign:1;
        #else 
            #error "Unknown endians."
        #endif
        } parts __attribute__ ((packed));
    } float32;
   
typedef union {
    double d;
    uint64_t binary;
   
    struct  {
        #if __BYTE_ORDER == __BIG_ENDIAN
        uint64_t sign:1;
        uint64_t exp:11;
        uint64_t fraction:52;
        #elif __BYTE_ORDER == __LITTLE_ENDIAN
        uint64_t fraction:52;
        uint64_t exp:11;
        uint64_t sign:1;
        #else 
            #error "Unknown endians."
        #endif
        } parts __attribute__ ((packed));
    } float64;
 
#define FLOAT32_MAX 0x7f800000
#define FLOAT32_MIN 0xff800000
#define FLOAT64_MAX
#define FLOAT64_MIN
 
/* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */
#define FLOAT32_NAN 0x7FC00001
#define FLOAT32_SIGNAN 0x7F800001
#define FLOAT32_INF 0x7F800000
 
#define FLOAT64_NAN 0x7FF8000000000001ll
#define FLOAT64_SIGNAN 0x7FF0000000000001ll
#define FLOAT64_INF 0x7FF0000000000000ll
 
#define FLOAT32_FRACTION_SIZE 23
#define FLOAT64_FRACTION_SIZE 52
 
#define FLOAT32_HIDDEN_BIT_MASK 0x800000
#define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll
 
#define FLOAT32_MAX_EXPONENT 0xFF
#define FLOAT64_MAX_EXPONENT 0x7FF
 
#define FLOAT32_BIAS 0x7F
#define FLOAT64_BIAS 0x3FF
#define FLOAT80_BIAS 0x3FFF
 
 
#endif
 
 
 /** @}
 */
 
 

Rev 1787	Rev 2071
1	/*	1	/*
2	* Copyright (C) 2005 Josef Cejka	2	* Copyright (c) 2005 Josef Cejka
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup softfloat	29	/** @addtogroup softfloat
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#ifndef __SFTYPES_H__	35	#ifndef __SFTYPES_H__
36	#define __SFTYPES_H__	36	#define __SFTYPES_H__
37		37
38	#include <endian.h>	38	#include <endian.h>
39	#include <stdint.h>	39	#include <stdint.h>
40		40
41	typedef union {	41	typedef union {
42	float f;	42	float f;
43	uint32_t binary;	43	uint32_t binary;
44		44
45	struct {	45	struct {
46	#if __BYTE_ORDER == __BIG_ENDIAN	46	#if __BYTE_ORDER == __BIG_ENDIAN
47	uint32_t sign:1;	47	uint32_t sign:1;
48	uint32_t exp:8;	48	uint32_t exp:8;
49	uint32_t fraction:23;	49	uint32_t fraction:23;
50	#elif __BYTE_ORDER == __LITTLE_ENDIAN	50	#elif __BYTE_ORDER == __LITTLE_ENDIAN
51	uint32_t fraction:23;	51	uint32_t fraction:23;
52	uint32_t exp:8;	52	uint32_t exp:8;
53	uint32_t sign:1;	53	uint32_t sign:1;
54	#else	54	#else
55	#error "Unknown endians."	55	#error "Unknown endians."
56	#endif	56	#endif
57	} parts __attribute__ ((packed));	57	} parts __attribute__ ((packed));
58	} float32;	58	} float32;
59		59
60	typedef union {	60	typedef union {
61	double d;	61	double d;
62	uint64_t binary;	62	uint64_t binary;
63		63
64	struct {	64	struct {
65	#if __BYTE_ORDER == __BIG_ENDIAN	65	#if __BYTE_ORDER == __BIG_ENDIAN
66	uint64_t sign:1;	66	uint64_t sign:1;
67	uint64_t exp:11;	67	uint64_t exp:11;
68	uint64_t fraction:52;	68	uint64_t fraction:52;
69	#elif __BYTE_ORDER == __LITTLE_ENDIAN	69	#elif __BYTE_ORDER == __LITTLE_ENDIAN
70	uint64_t fraction:52;	70	uint64_t fraction:52;
71	uint64_t exp:11;	71	uint64_t exp:11;
72	uint64_t sign:1;	72	uint64_t sign:1;
73	#else	73	#else
74	#error "Unknown endians."	74	#error "Unknown endians."
75	#endif	75	#endif
76	} parts __attribute__ ((packed));	76	} parts __attribute__ ((packed));
77	} float64;	77	} float64;
78		78
79	#define FLOAT32_MAX 0x7f800000	79	#define FLOAT32_MAX 0x7f800000
80	#define FLOAT32_MIN 0xff800000	80	#define FLOAT32_MIN 0xff800000
81	#define FLOAT64_MAX	81	#define FLOAT64_MAX
82	#define FLOAT64_MIN	82	#define FLOAT64_MIN
83		83
84	/* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */	84	/* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */
85	#define FLOAT32_NAN 0x7FC00001	85	#define FLOAT32_NAN 0x7FC00001
86	#define FLOAT32_SIGNAN 0x7F800001	86	#define FLOAT32_SIGNAN 0x7F800001
87	#define FLOAT32_INF 0x7F800000	87	#define FLOAT32_INF 0x7F800000
88		88
89	#define FLOAT64_NAN 0x7FF8000000000001ll	89	#define FLOAT64_NAN 0x7FF8000000000001ll
90	#define FLOAT64_SIGNAN 0x7FF0000000000001ll	90	#define FLOAT64_SIGNAN 0x7FF0000000000001ll
91	#define FLOAT64_INF 0x7FF0000000000000ll	91	#define FLOAT64_INF 0x7FF0000000000000ll
92		92
93	#define FLOAT32_FRACTION_SIZE 23	93	#define FLOAT32_FRACTION_SIZE 23
94	#define FLOAT64_FRACTION_SIZE 52	94	#define FLOAT64_FRACTION_SIZE 52
95		95
96	#define FLOAT32_HIDDEN_BIT_MASK 0x800000	96	#define FLOAT32_HIDDEN_BIT_MASK 0x800000
97	#define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll	97	#define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll
98		98
99	#define FLOAT32_MAX_EXPONENT 0xFF	99	#define FLOAT32_MAX_EXPONENT 0xFF
100	#define FLOAT64_MAX_EXPONENT 0x7FF	100	#define FLOAT64_MAX_EXPONENT 0x7FF
101		101
102	#define FLOAT32_BIAS 0x7F	102	#define FLOAT32_BIAS 0x7F
103	#define FLOAT64_BIAS 0x3FF	103	#define FLOAT64_BIAS 0x3FF
104	#define FLOAT80_BIAS 0x3FFF	104	#define FLOAT80_BIAS 0x3FFF
105		105
106		106
107	#endif	107	#endif
108		108
109		109
110	/** @}	110	/** @}
111	*/	111	*/
112		112
113		113

Subversion Repositories HelenOS

(root)/trunk/uspace/softfloat/include/sftypes.h – Rev 1787 → 2071