Rev 1031 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 647 | cejka | 1 | /* |
| 2 | * Copyright (C) 2005 Josef Cejka |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1657 | cejka | 29 | /** @addtogroup softfloat |
| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 647 | cejka | 35 | #ifndef __SFTYPES_H__ |
| 36 | #define __SFTYPES_H__ |
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| 37 | |||
| 1031 | cejka | 38 | #include <endian.h> |
| 39 | #include <stdint.h> |
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| 857 | cejka | 40 | |
| 647 | cejka | 41 | typedef union { |
| 42 | float f; |
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| 1031 | cejka | 43 | uint32_t binary; |
| 652 | cejka | 44 | |
| 647 | cejka | 45 | struct { |
| 1031 | cejka | 46 | #if __BYTE_ORDER == __BIG_ENDIAN |
| 47 | uint32_t sign:1; |
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| 48 | uint32_t exp:8; |
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| 49 | uint32_t fraction:23; |
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| 50 | #elif __BYTE_ORDER == __LITTLE_ENDIAN |
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| 51 | uint32_t fraction:23; |
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| 52 | uint32_t exp:8; |
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| 53 | uint32_t sign:1; |
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| 647 | cejka | 54 | #else |
| 1031 | cejka | 55 | #error "Unknown endians." |
| 647 | cejka | 56 | #endif |
| 57 | } parts __attribute__ ((packed)); |
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| 58 | } float32; |
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| 59 | |||
| 60 | typedef union { |
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| 61 | double d; |
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| 1031 | cejka | 62 | uint64_t binary; |
| 652 | cejka | 63 | |
| 647 | cejka | 64 | struct { |
| 1031 | cejka | 65 | #if __BYTE_ORDER == __BIG_ENDIAN |
| 66 | uint64_t sign:1; |
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| 67 | uint64_t exp:11; |
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| 68 | uint64_t fraction:52; |
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| 69 | #elif __BYTE_ORDER == __LITTLE_ENDIAN |
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| 70 | uint64_t fraction:52; |
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| 71 | uint64_t exp:11; |
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| 72 | uint64_t sign:1; |
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| 647 | cejka | 73 | #else |
| 1031 | cejka | 74 | #error "Unknown endians." |
| 647 | cejka | 75 | #endif |
| 76 | } parts __attribute__ ((packed)); |
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| 77 | } float64; |
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| 78 | |||
| 79 | #define FLOAT32_MAX 0x7f800000 |
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| 80 | #define FLOAT32_MIN 0xff800000 |
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| 81 | #define FLOAT64_MAX |
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| 82 | #define FLOAT64_MIN |
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| 83 | |||
| 661 | cejka | 84 | /* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */ |
| 734 | cejka | 85 | #define FLOAT32_NAN 0x7FC00001 |
| 86 | #define FLOAT32_SIGNAN 0x7F800001 |
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| 661 | cejka | 87 | #define FLOAT32_INF 0x7F800000 |
| 88 | |||
| 734 | cejka | 89 | #define FLOAT64_NAN 0x7FF8000000000001ll |
| 90 | #define FLOAT64_SIGNAN 0x7FF0000000000001ll |
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| 91 | #define FLOAT64_INF 0x7FF0000000000000ll |
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| 92 | |||
| 804 | cejka | 93 | #define FLOAT32_FRACTION_SIZE 23 |
| 94 | #define FLOAT64_FRACTION_SIZE 52 |
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| 688 | cejka | 95 | |
| 731 | cejka | 96 | #define FLOAT32_HIDDEN_BIT_MASK 0x800000 |
| 732 | cejka | 97 | #define FLOAT64_HIDDEN_BIT_MASK 0x10000000000000ll |
| 731 | cejka | 98 | |
| 732 | cejka | 99 | #define FLOAT32_MAX_EXPONENT 0xFF |
| 734 | cejka | 100 | #define FLOAT64_MAX_EXPONENT 0x7FF |
| 732 | cejka | 101 | |
| 688 | cejka | 102 | #define FLOAT32_BIAS 0x7F |
| 647 | cejka | 103 | #define FLOAT64_BIAS 0x3FF |
| 104 | #define FLOAT80_BIAS 0x3FFF |
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| 105 | |||
| 106 | |||
| 107 | #endif |
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| 108 | |||
| 1657 | cejka | 109 | |
| 110 | /** @} |
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| 111 | */ |
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| 112 |