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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 <byteorder.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 defined(ARCH_IS_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 defined(ARCH_IS_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 defined(ARCH_IS_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 defined(ARCH_IS_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 | /* |
|
84 | /* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */ |
85 | * For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, |
- | 86 | * comparing with these constants is not sufficient. |
|
- | 87 | */ |
|
85 | #define FLOAT32_NAN 0x7FC00001 |
88 | #define FLOAT32_NAN 0x7FC00001 |
86 | #define FLOAT32_SIGNAN 0x7F800001 |
89 | #define FLOAT32_SIGNAN 0x7F800001 |
87 | #define FLOAT32_INF 0x7F800000 |
90 | #define FLOAT32_INF 0x7F800000 |
88 | 91 | ||
89 | #define FLOAT64_NAN 0x7FF8000000000001ll |
92 | #define FLOAT64_NAN 0x7FF8000000000001ll |
90 | #define FLOAT64_SIGNAN 0x7FF0000000000001ll |
93 | #define FLOAT64_SIGNAN 0x7FF0000000000001ll |
91 | #define FLOAT64_INF 0x7FF0000000000000ll |
94 | #define FLOAT64_INF 0x7FF0000000000000ll |
92 | 95 | ||
93 | #define FLOAT32_FRACTION_SIZE 23 |
96 | #define FLOAT32_FRACTION_SIZE 23 |
94 | #define FLOAT64_FRACTION_SIZE 52 |
97 | #define FLOAT64_FRACTION_SIZE 52 |
95 | 98 | ||
96 | #define FLOAT32_HIDDEN_BIT_MASK 0x800000 |
99 | #define FLOAT32_HIDDEN_BIT_MASK 0x800000 |
97 | #define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll |
100 | #define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll |
98 | 101 | ||
99 | #define FLOAT32_MAX_EXPONENT 0xFF |
102 | #define FLOAT32_MAX_EXPONENT 0xFF |
100 | #define FLOAT64_MAX_EXPONENT 0x7FF |
103 | #define FLOAT64_MAX_EXPONENT 0x7FF |
101 | 104 | ||
102 | #define FLOAT32_BIAS 0x7F |
105 | #define FLOAT32_BIAS 0x7F |
103 | #define FLOAT64_BIAS 0x3FF |
106 | #define FLOAT64_BIAS 0x3FF |
104 | #define FLOAT80_BIAS 0x3FFF |
107 | #define FLOAT80_BIAS 0x3FFF |
105 | 108 | ||
106 | 109 | ||
107 | #endif |
110 | #endif |
108 | 111 | ||
109 | 112 | ||
110 | /** @} |
113 | /** @} |
111 | */ |
114 | */ |
112 | 115 | ||
113 | 116 |