0,0 → 1,112 |
/* |
* 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. |
*/ |
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/** @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 |
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/* 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 |
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#endif |
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/** @} |
*/ |
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