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147 行
3.2 KiB
147 行
3.2 KiB
#pragma once
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#include <type_traits>
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#include <iostream>
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wnarrowing"
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namespace ninefloat{
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struct private_t{};
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private_t priv;
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template<class integer_type, int fractionals>
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class Q{
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integer_type backend;
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static constexpr int degen=fractionals;
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constexpr Q (const integer_type value, private_t)
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: backend{value}
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{{std::cout<<value<< " : "<<backend<<std::endl;}}
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public:
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template<class srcT>
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constexpr Q (const srcT value)
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: backend{(integer_type)(value*(1<<degen))}
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{std::cout<<value<< " : "<<backend<<std::endl;}
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bool constexpr is_negative()
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{
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return backend&(1<<(sizeof(backend)-1));
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}
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integer_type constexpr data()
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{
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return backend;
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}
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bool constexpr is_positive()
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{
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return !is_negative();
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}
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Q constexpr operator+=(const Q& oth)
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{
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backend+=oth.backend;
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return this;
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}
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Q constexpr operator-=(const Q& oth)
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{
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backend-=oth.backend;
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return this;
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}
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Q constexpr operator/=(const Q& oth)
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{
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backend*=1<<Q<integer_type, fractionals>::degen;
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backend/=oth.backend;
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return this;
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}
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Q constexpr operator*=(const Q& oth)
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{
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if constexpr(Q<integer_type, fractionals>::degen%2==0)
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{
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backend=(backend>>(Q<integer_type, fractionals>::degen/2))*(oth.backend>>(Q<integer_type, fractionals>::degen/2));
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}else{
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backend=(backend>>(Q<integer_type, fractionals>::degen>>1))*(oth.backend>>((Q<integer_type, fractionals>::degen>>1)+1));
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}
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return this;
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}
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Q constexpr operator+(const Q& oth)
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{
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return Q{backend+oth.backend, priv};
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}
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Q constexpr operator-(const Q& oth)
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{
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return Q{backend-oth.backend, priv};
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}
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Q constexpr operator/(const Q& oth)
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{
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return Q{(1<<Q<integer_type, fractionals>::degen)*backend/oth.backend, priv};
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}
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Q constexpr operator*(const Q& oth)
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{
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if constexpr(Q<integer_type, fractionals>::degen%2==0)
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{
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return Q{(backend>>(Q<integer_type, fractionals>::degen/2))*(oth.backend>>(Q<integer_type, fractionals>::degen/2)),priv};
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}else{
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return Q{(backend>>(Q<integer_type, fractionals>::degen>>1))*(oth.backend>>((Q<integer_type, fractionals>::degen>>1)+1)),priv};
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}
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}
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bool constexpr operator==(const Q& oth)
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{
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return backend == oth.backend;
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}
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bool constexpr operator!=(const Q& oth)
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{
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return backend != oth.backend;
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}
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bool constexpr operator>=(const Q& oth)
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{
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return backend >= oth.backend;
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}
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bool constexpr operator<=(const Q& oth)
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{
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return backend <= oth.backend;
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}
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bool constexpr operator>(const Q& oth)
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{
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return backend > oth.backend;
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}
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bool constexpr operator<(const Q& oth)
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{
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return backend < oth.backend;
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}
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constexpr operator float()
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{
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float n=backend;
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n/=(1<<Q<integer_type, fractionals>::degen);
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return n;
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}
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constexpr operator double()
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{
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double n=backend;
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n/=(1<<Q<integer_type, fractionals>::degen);
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return n;
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}
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};
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#pragma GCC diagnostic pop
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}
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