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FixedPointsArduino/src/FixedPoints/SFixedFreeFunctions.h

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Update licence year (#54)
7 years ago
// Copyright 2017-2018 Pharap
Prepend licence message to all source files
8 years ago
//
// 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.
Add files via upload
8 years ago
FIXED_POINTS_BEGIN_NAMESPACE
//
// multiply
//
template< unsigned Integer, unsigned Fraction >
constexpr SFixed<Integer * 2, Fraction * 2> multiply(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
Add descriptive error for multiplication (#26) Provides a better error message for when multiplication can't be used because the required precision type is too large.
7 years ago
{
static_assert(((Integer + 1) * 2 + Fraction * 2) <= FIXED_POINTS_DETAILS::BitSize<intmax_t>::Value, "Multiplication cannot be performed, the result type would be too large");
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8 years ago
using ResultType = SFixed<Integer * 2, Fraction * 2>;
using InternalType = typename ResultType::InternalType;
return ResultType::fromInternal(static_cast<InternalType>(static_cast<InternalType>(left.getInternal()) * static_cast<InternalType>(right.getInternal())));
}
//
// Basic Logic Operations
//
template< unsigned Integer, unsigned Fraction >
constexpr bool operator ==(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
return (left.getInternal() == right.getInternal());
}
template< unsigned Integer, unsigned Fraction >
constexpr bool operator !=(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
return (left.getInternal() != right.getInternal());
}
template< unsigned Integer, unsigned Fraction >
constexpr bool operator <(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
return (left.getInternal() < right.getInternal());
}
template< unsigned Integer, unsigned Fraction >
constexpr bool operator >(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
return (left.getInternal() > right.getInternal());
}
template< unsigned Integer, unsigned Fraction >
constexpr bool operator <=(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
return (left.getInternal() <= right.getInternal());
}
template< unsigned Integer, unsigned Fraction >
constexpr bool operator >=(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
return (left.getInternal() >= right.getInternal());
}
//
// Inter-size Logic Operations
//
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr bool operator ==(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator == has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) == static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr bool operator !=(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator != has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) != static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr bool operator <(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator < has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) < static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr bool operator >(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator > has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) > static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr bool operator <=(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator <= has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) <= static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr bool operator >=(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator >= has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) >= static_cast<CompareType>(right));
}
//
// Basic Arithmetic Operations
//
template< unsigned Integer, unsigned Fraction >
constexpr SFixed<Integer, Fraction> operator +(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
using InternalType = typename SFixed<Integer, Fraction>::InternalType;
return SFixed<Integer, Fraction>::fromInternal(static_cast<InternalType>(left.getInternal() + right.getInternal()));
}
template< unsigned Integer, unsigned Fraction >
constexpr SFixed<Integer, Fraction> operator -(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
using InternalType = typename SFixed<Integer, Fraction>::InternalType;
return SFixed<Integer, Fraction>::fromInternal(static_cast<InternalType>(left.getInternal() - right.getInternal()));
}
template< unsigned Integer, unsigned Fraction >
constexpr SFixed<Integer, Fraction> operator *(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
Add descriptive error for multiplication (#26) Provides a better error message for when multiplication can't be used because the required precision type is too large.
7 years ago
static_assert(((Integer + 1) * 2 + Fraction * 2) <= FIXED_POINTS_DETAILS::BitSize<intmax_t>::Value, "Multiplication cannot be performed, the intermediary type would be too large");
Add files via upload
8 years ago
using InternalType = typename SFixed<Integer, Fraction>::InternalType;
using PrecisionType = typename SFixed<Integer * 2, Fraction * 2>::InternalType;
return SFixed<Integer, Fraction>::fromInternal(static_cast<InternalType>((static_cast<PrecisionType>(left.getInternal()) * static_cast<PrecisionType>(right.getInternal())) >> Fraction));
}
template< unsigned Integer, unsigned Fraction >
constexpr SFixed<Integer, Fraction> operator /(const SFixed<Integer, Fraction> & left, const SFixed<Integer, Fraction> & right)
{
using InternalType = typename SFixed<Integer, Fraction>::InternalType;
using PrecisionType = typename SFixed<Integer * 2, Fraction * 2>::InternalType;
return SFixed<Integer, Fraction>::fromInternal(static_cast<InternalType>((static_cast<PrecisionType>(left.getInternal()) << Fraction) / right.getInternal()));
}
//
// Inter-size Arithmetic Operations
//
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr auto operator +(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
-> FIXED_POINTS_DETAILS::LargerType< SFixed<IntegerLeft, FractionLeft>, SFixed<IntegerRight, FractionRight> >
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator + has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) + static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr auto operator -(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
-> FIXED_POINTS_DETAILS::LargerType< SFixed<IntegerLeft, FractionLeft>, SFixed<IntegerRight, FractionRight> >
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator - has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) - static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr auto operator *(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
-> FIXED_POINTS_DETAILS::LargerType< SFixed<IntegerLeft, FractionLeft>, SFixed<IntegerRight, FractionRight> >
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator * has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) * static_cast<CompareType>(right));
}
template< unsigned IntegerLeft, unsigned FractionLeft, unsigned IntegerRight, unsigned FractionRight >
constexpr auto operator /(const SFixed<IntegerLeft, FractionLeft> & left, const SFixed<IntegerRight, FractionRight> & right)
-> FIXED_POINTS_DETAILS::LargerType< SFixed<IntegerLeft, FractionLeft>, SFixed<IntegerRight, FractionRight> >
{
using LeftType = SFixed<IntegerLeft, FractionLeft>;
using RightType = SFixed<IntegerRight, FractionRight>;
static_assert(LeftType::InternalSize != RightType::InternalSize, "operator / has ambiguous result");
using CompareType = FIXED_POINTS_DETAILS::LargerType<LeftType, RightType>;
return (static_cast<CompareType>(left) / static_cast<CompareType>(right));
}
//
// Literal-type Operators
// Generated by macro to make maintenance easier
//
#define LOGIC_OPERATOR( type, op )\
template< unsigned Integer, unsigned Fraction >\
constexpr bool operator op (const SFixed<Integer, Fraction> & left, const type & right)\
{\
return (left op SFixed<Integer, Fraction>(right));\
}\
\
template< unsigned Integer, unsigned Fraction >\
constexpr bool operator op (const type & left, const SFixed<Integer, Fraction> & right)\
{\
return (SFixed<Integer, Fraction>(left) op right);\
}
#define ARITHMETIC_OPERATOR( type, op )\
template< unsigned Integer, unsigned Fraction >\
constexpr SFixed<Integer, Fraction> operator op (const SFixed<Integer, Fraction> & left, const type & right)\
{\
return (left op SFixed<Integer, Fraction>(right));\
}\
\
template< unsigned Integer, unsigned Fraction >\
constexpr SFixed<Integer, Fraction> operator op (const type & left, const SFixed<Integer, Fraction> & right)\
{\
return (SFixed<Integer, Fraction>(left) op right);\
}
Improve operator generation macros (#58)
7 years ago
#define LOGIC_OPERATORS( type )\
LOGIC_OPERATOR( type, == )\
LOGIC_OPERATOR( type, != )\
LOGIC_OPERATOR( type, < )\
LOGIC_OPERATOR( type, <= )\
LOGIC_OPERATOR( type, > )\
LOGIC_OPERATOR( type, >= )
#define ARITHMETIC_OPERATORS( type ) \
ARITHMETIC_OPERATOR( type, + )\
ARITHMETIC_OPERATOR( type, - )\
ARITHMETIC_OPERATOR( type, * )\
ARITHMETIC_OPERATOR( type, / )
#define OPERATORS( type ) \
LOGIC_OPERATORS( type )\
ARITHMETIC_OPERATORS( type )
OPERATORS( float )
OPERATORS( double )
OPERATORS( long double )
OPERATORS( char )
OPERATORS( unsigned char )
OPERATORS( signed char )
OPERATORS( unsigned short int )
OPERATORS( signed short int )
OPERATORS( unsigned int )
OPERATORS( signed int )
OPERATORS( unsigned long int )
OPERATORS( signed long int )
OPERATORS( unsigned long long int )
OPERATORS( signed long long int )
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8 years ago
// Prevent Macro-bleed:
#undef OPERATORS
#undef ARITHMETIC_OPERATORS
Improve operator generation macros (#58)
7 years ago
#undef LOGIC_OPERATORS
#undef ARITHMETIC_OPERATOR
#undef LOGIC_OPERATOR
Add files via upload
8 years ago
FIXED_POINTS_END_NAMESPACE