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81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
#pragma once
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//
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// FILE: float16.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.8
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// PURPOSE: Arduino library to implement float16 data type.
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// half-precision floating point format,
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// used for efficient storage and transport.
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// URL: https://github.com/RobTillaart/float16
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#include "Arduino.h"
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#define FLOAT16_LIB_VERSION (F("0.1.8"))
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class float16: public Printable
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{
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public:
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// Constructors
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float16(void) { _value = 0x0000; };
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float16(double f);
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float16(const float16 &f) { _value = f._value; };
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// Conversion
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double toDouble(void) const;
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// access the 2 byte representation.
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uint16_t getBinary() { return _value; };
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void setBinary(uint16_t u) { _value = u; };
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// Printable
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size_t printTo(Print& p) const;
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void setDecimals(uint8_t d) { _decimals = d; };
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uint8_t getDecimals() { return _decimals; };
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// equalities
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bool operator == (const float16& f);
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bool operator != (const float16& f);
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bool operator > (const float16& f);
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bool operator >= (const float16& f);
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bool operator < (const float16& f);
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bool operator <= (const float16& f);
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// negation
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float16 operator - ();
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// basic math
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float16 operator + (const float16& f);
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float16 operator - (const float16& f);
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float16 operator * (const float16& f);
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float16 operator / (const float16& f);
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float16& operator += (const float16& f);
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float16& operator -= (const float16& f);
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float16& operator *= (const float16& f);
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float16& operator /= (const float16& f);
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// math helper functions
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int sign(); // 1 = positive 0 = zero -1 = negative.
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bool isZero();
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bool isNaN();
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bool isInf();
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// CORE CONVERSION
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// should be private but for testing...
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float f16tof32(uint16_t) const;
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uint16_t f32tof16(float) const;
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private:
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uint8_t _decimals = 4;
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uint16_t _value;
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};
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// -- END OF FILE --
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