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float: style

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Danny Robson 2015-11-13 17:16:49 +11:00
parent f2bd6501e2
commit 8b16317b0e
2 changed files with 71 additions and 37 deletions
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17
float.cpp
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@ -1,4 +1,21 @@
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2011 Danny Robson <danny@nerdcruft.net>
*/
#include "float.hpp" #include "float.hpp"
#include "debug.hpp"
#include <cmath> #include <cmath>

91
float.hpp
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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2011 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __FLOAT_HPP #ifndef __FLOAT_HPP
#define __FLOAT_HPP #define __FLOAT_HPP
#include "types/bits.hpp" #include "types/bits.hpp"
#include "debug.hpp"
///////////////////////////////////////////////////////////////////////////////
template <unsigned int EXPONENT, unsigned int SIGNIFICAND> template <unsigned int EXPONENT, unsigned int SIGNIFICAND>
class ieee_float { class ieee_float
public: {
static const unsigned int EXPONENT_BITS = EXPONENT; public:
static const unsigned int SIGNIFICAND_BITS = SIGNIFICAND; static const unsigned int EXPONENT_BITS = EXPONENT;
static const unsigned int TOTAL_BITS = 1 + EXPONENT + SIGNIFICAND; static const unsigned int SIGNIFICAND_BITS = SIGNIFICAND;
static const unsigned int TOTAL_BITS = 1 + EXPONENT + SIGNIFICAND;
static const unsigned int BIAS = (1 << (EXPONENT - 1)) - 1; static const unsigned int BIAS = (1 << (EXPONENT - 1)) - 1;
typedef typename bits_type<TOTAL_BITS>::sint sint_t; typedef typename bits_type<TOTAL_BITS>::sint sint_t;
typedef typename bits_type<TOTAL_BITS>::uint uint_t; typedef typename bits_type<TOTAL_BITS>::uint uint_t;
typedef typename bits_type<TOTAL_BITS>::floating floating_t; typedef typename bits_type<TOTAL_BITS>::floating floating_t;
protected: protected:
union { union {
uint_t m_bits; uint_t m_bits;
floating_t m_floating; floating_t m_floating;
struct { struct {
uint_t sign : 1; uint_t sign : 1;
uint_t exponent : EXPONENT; uint_t exponent : EXPONENT;
uint_t significand : SIGNIFICAND; uint_t significand : SIGNIFICAND;
} m_components; } m_components;
}; };
public: public:
ieee_float (void); ieee_float (void);
ieee_float (floating_t _floating); ieee_float (floating_t _floating);
ieee_float (const ieee_float &rhs); ieee_float (const ieee_float &rhs);
static unsigned int bias (void) static unsigned int bias (void)
{ return BIAS; } { return BIAS; }
void set_bits (uint_t _bits) { m_bits = _bits; } void set_bits (uint_t _bits) { m_bits = _bits; }
uint_t bits (void) const { return m_bits; } uint_t bits (void) const { return m_bits; }
bool negative (void) const { return m_components.sign; } bool negative (void) const { return m_components.sign; }
void negate (void) { m_components.sign ^= m_components.sign; } void negate (void) { m_components.sign ^= m_components.sign; }
bool is_zero (void) const; bool is_zero (void) const;
bool is_subnormal (void) const; bool is_subnormal (void) const;
bool is_inifinity (void) const; bool is_inifinity (void) const;
bool is_nan (void) const; bool is_nan (void) const;
bool operator== (floating_t) const; bool operator== (floating_t) const;
static bool almost_equal (floating_t, floating_t); static bool almost_equal (floating_t, floating_t);
static bool almost_equal (floating_t, floating_t, unsigned ulps); static bool almost_equal (floating_t, floating_t, unsigned ulps);
}; };