WebSVN – HelenOS-historic – Diff – /uspace/trunk/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.
 */
 
#ifndef __SFTYPES_H__
#define __SFTYPES_H__
 
typedef union {
    float f;
    __u32 binary;
 
    struct  {
        #ifdef __BIG_ENDIAN__
        __u32 sign:1;
        __u32 exp:8;
        __u32 fraction:23;
        #elif defined __LITTLE_ENDIAN__
        __u32 fraction:23;
        __u32 exp:8;
        __u32 sign:1;
        #else 
        #error "Unknown endians."
        #endif
        } parts __attribute__ ((packed));
    } float32;
   
typedef union {
    double d;
    __u64 binary;
   
    struct  {
        #ifdef __BIG_ENDIAN__
        __u64 sign:1;
        __u64 exp:11;
        __u64 fraction:52;
        #elif defined __LITTLE_ENDIAN__
        __u64 fraction:52;
        __u64 exp:11;
        __u64 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 734	Rev 804
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	#ifndef __SFTYPES_H__	29	#ifndef __SFTYPES_H__
30	#define __SFTYPES_H__	30	#define __SFTYPES_H__
31		31
32	typedef union {	32	typedef union {
33	float f;	33	float f;
34	__u32 binary;	34	__u32 binary;
35		35
36	struct {	36	struct {
37	#ifdef __BIG_ENDIAN__	37	#ifdef __BIG_ENDIAN__
38	__u32 sign:1;	38	__u32 sign:1;
39	__u32 exp:8;	39	__u32 exp:8;
40	__u32 mantisa:23;	40	__u32 fraction:23;
41	#elif defined __LITTLE_ENDIAN__	41	#elif defined __LITTLE_ENDIAN__
42	__u32 mantisa:23;	42	__u32 fraction:23;
43	__u32 exp:8;	43	__u32 exp:8;
44	__u32 sign:1;	44	__u32 sign:1;
45	#else	45	#else
46	#error "Unknown endians."	46	#error "Unknown endians."
47	#endif	47	#endif
48	} parts __attribute__ ((packed));	48	} parts __attribute__ ((packed));
49	} float32;	49	} float32;
50		50
51	typedef union {	51	typedef union {
52	double d;	52	double d;
53	__u64 binary;	53	__u64 binary;
54		54
55	struct {	55	struct {
56	#ifdef __BIG_ENDIAN__	56	#ifdef __BIG_ENDIAN__
57	__u64 sign:1;	57	__u64 sign:1;
58	__u64 exp:11;	58	__u64 exp:11;
59	__u64 mantisa:52;	59	__u64 fraction:52;
60	#elif defined __LITTLE_ENDIAN__	60	#elif defined __LITTLE_ENDIAN__
61	__u64 mantisa:52;	61	__u64 fraction:52;
62	__u64 exp:11;	62	__u64 exp:11;
63	__u64 sign:1;	63	__u64 sign:1;
64	#else	64	#else
65	#error "Unknown endians."	65	#error "Unknown endians."
66	#endif	66	#endif
67	} parts __attribute__ ((packed));	67	} parts __attribute__ ((packed));
68	} float64;	68	} float64;
69		69
70	#define FLOAT32_MAX 0x7f800000	70	#define FLOAT32_MAX 0x7f800000
71	#define FLOAT32_MIN 0xff800000	71	#define FLOAT32_MIN 0xff800000
72	#define FLOAT64_MAX	72	#define FLOAT64_MAX
73	#define FLOAT64_MIN	73	#define FLOAT64_MIN
74		74
75	/* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */	75	/* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */
76	#define FLOAT32_NAN 0x7FC00001	76	#define FLOAT32_NAN 0x7FC00001
77	#define FLOAT32_SIGNAN 0x7F800001	77	#define FLOAT32_SIGNAN 0x7F800001
78	#define FLOAT32_INF 0x7F800000	78	#define FLOAT32_INF 0x7F800000
79		79
80	#define FLOAT64_NAN 0x7FF8000000000001ll	80	#define FLOAT64_NAN 0x7FF8000000000001ll
81	#define FLOAT64_SIGNAN 0x7FF0000000000001ll	81	#define FLOAT64_SIGNAN 0x7FF0000000000001ll
82	#define FLOAT64_INF 0x7FF0000000000000ll	82	#define FLOAT64_INF 0x7FF0000000000000ll
83		83
84	#define FLOAT32_MANTISA_SIZE 23	84	#define FLOAT32_FRACTION_SIZE 23
85	#define FLOAT64_MANTISA_SIZE 52	85	#define FLOAT64_FRACTION_SIZE 52
86		86
87	#define FLOAT32_HIDDEN_BIT_MASK 0x800000	87	#define FLOAT32_HIDDEN_BIT_MASK 0x800000
88	#define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll	88	#define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll
89		89
90	#define FLOAT32_MAX_EXPONENT 0xFF	90	#define FLOAT32_MAX_EXPONENT 0xFF
91	#define FLOAT64_MAX_EXPONENT 0x7FF	91	#define FLOAT64_MAX_EXPONENT 0x7FF
92		92
93	#define FLOAT32_BIAS 0x7F	93	#define FLOAT32_BIAS 0x7F
94	#define FLOAT64_BIAS 0x3FF	94	#define FLOAT64_BIAS 0x3FF
95	#define FLOAT80_BIAS 0x3FFF	95	#define FLOAT80_BIAS 0x3FFF
96		96
97		97
98	#endif	98	#endif
99		99
100		100

Subversion Repositories HelenOS-historic

(root)/uspace/trunk/softfloat/include/sftypes.h – Rev 734 → 804