| 1 | /*
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| 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 |
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| 29 | #ifndef __SFTYPES_H__
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| 30 | #define __SFTYPES_H__
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| 31 |
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| 32 | typedef union {
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| 33 | float f;
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| 34 | __u32 binary;
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| 35 |
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| 36 | struct {
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| 37 | #ifdef __BIG_ENDIAN__
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| 38 | __u32 sign:1;
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| 39 | __u32 exp:8;
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| 40 | __u32 mantisa:23;
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| 41 | #elif defined __LITTLE_ENDIAN__
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| 42 | __u32 mantisa:23;
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| 43 | __u32 exp:8;
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| 44 | __u32 sign:1;
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| 45 | #else
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| 46 | #error "Unknown endians."
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| 47 | #endif
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| 48 | } parts __attribute__ ((packed));
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| 49 | } float32;
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| 50 |
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| 51 | typedef union {
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| 52 | double d;
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| 53 | __u64 binary;
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| 54 |
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| 55 | struct {
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| 56 | #ifdef __BIG_ENDIAN__
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| 57 | __u64 sign:1;
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| 58 | __u64 exp:11;
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| 59 | __u64 mantisa:52;
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| 60 | #elif defined __LITTLE_ENDIAN__
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| 61 | __u64 mantisa:52;
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| 62 | __u64 exp:11;
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| 63 | __u64 sign:1;
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| 64 | #else
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| 65 | #error "Unknown endians."
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| 66 | #endif
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| 67 | } parts __attribute__ ((packed));
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| 68 | } float64;
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| 69 |
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| 70 | #define FLOAT32_MAX 0x7f800000
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| 71 | #define FLOAT32_MIN 0xff800000
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| 72 | #define FLOAT64_MAX
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| 73 | #define FLOAT64_MIN
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| 74 |
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| 75 | /* For recognizing NaNs or infinity use isFloat32NaN and is Float32Inf, comparing with this constants is not sufficient */
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| 76 | #define FLOAT32_NAN 0x7F800001
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| 77 | #define FLOAT32_SIGNAN 0x7FC00000
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| 78 | #define FLOAT32_INF 0x7F800000
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| 79 |
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| 80 | #define FLOAT32_MANTISA_SIZE 23
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| 81 | #define FLOAT64_MANTISA_SIZE 52
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| 82 |
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| 83 | #define FLOAT32_BIAS 0x7F
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| 84 | #define FLOAT64_BIAS 0x3FF
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| 85 | #define FLOAT80_BIAS 0x3FFF
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| 86 |
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| 87 |
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| 88 | #endif
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| 89 |
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