Merge pull request #9094 from lioncash/fixed
common/fixed_point: Minor interface improvements
This commit is contained in:
liamwhite
GitHub
commit
7daf751b8d
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@ -34,4 +34,12 @@ concept DerivedFrom = requires {
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template <typename From, typename To>
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concept ConvertibleTo = std::is_convertible_v<From, To>;
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// No equivalents in the stdlib
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template <typename T>
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concept IsArithmetic = std::is_arithmetic_v<T>;
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template <typename T>
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concept IsIntegral = std::is_integral_v<T>;
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} // namespace Common
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@ -12,6 +12,8 @@
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#include <ostream>
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#include <type_traits>
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#include <common/concepts.h>
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namespace Common {
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template <size_t I, size_t F>
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@ -50,8 +52,8 @@ struct type_from_size<64> {
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static constexpr size_t size = 64;
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using value_type = int64_t;
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using unsigned_type = std::make_unsigned<value_type>::type;
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using signed_type = std::make_signed<value_type>::type;
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using unsigned_type = std::make_unsigned_t<value_type>;
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using signed_type = std::make_signed_t<value_type>;
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using next_size = type_from_size<128>;
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};
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@ -61,8 +63,8 @@ struct type_from_size<32> {
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static constexpr size_t size = 32;
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using value_type = int32_t;
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using unsigned_type = std::make_unsigned<value_type>::type;
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using signed_type = std::make_signed<value_type>::type;
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using unsigned_type = std::make_unsigned_t<value_type>;
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using signed_type = std::make_signed_t<value_type>;
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using next_size = type_from_size<64>;
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};
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@ -72,8 +74,8 @@ struct type_from_size<16> {
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static constexpr size_t size = 16;
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using value_type = int16_t;
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using unsigned_type = std::make_unsigned<value_type>::type;
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using signed_type = std::make_signed<value_type>::type;
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using unsigned_type = std::make_unsigned_t<value_type>;
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using signed_type = std::make_signed_t<value_type>;
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using next_size = type_from_size<32>;
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};
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@ -83,8 +85,8 @@ struct type_from_size<8> {
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static constexpr size_t size = 8;
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using value_type = int8_t;
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using unsigned_type = std::make_unsigned<value_type>::type;
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using signed_type = std::make_signed<value_type>::type;
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using unsigned_type = std::make_unsigned_t<value_type>;
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using signed_type = std::make_signed_t<value_type>;
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using next_size = type_from_size<16>;
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};
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@ -101,7 +103,7 @@ struct divide_by_zero : std::exception {};
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template <size_t I, size_t F>
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constexpr FixedPoint<I, F> divide(
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FixedPoint<I, F> numerator, FixedPoint<I, F> denominator, FixedPoint<I, F>& remainder,
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typename std::enable_if<type_from_size<I + F>::next_size::is_specialized>::type* = nullptr) {
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std::enable_if_t<type_from_size<I + F>::next_size::is_specialized>* = nullptr) {
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using next_type = typename FixedPoint<I, F>::next_type;
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using base_type = typename FixedPoint<I, F>::base_type;
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@ -121,7 +123,7 @@ constexpr FixedPoint<I, F> divide(
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template <size_t I, size_t F>
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constexpr FixedPoint<I, F> divide(
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FixedPoint<I, F> numerator, FixedPoint<I, F> denominator, FixedPoint<I, F>& remainder,
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typename std::enable_if<!type_from_size<I + F>::next_size::is_specialized>::type* = nullptr) {
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std::enable_if_t<!type_from_size<I + F>::next_size::is_specialized>* = nullptr) {
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using unsigned_type = typename FixedPoint<I, F>::unsigned_type;
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@ -191,7 +193,7 @@ constexpr FixedPoint<I, F> divide(
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template <size_t I, size_t F>
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constexpr FixedPoint<I, F> multiply(
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FixedPoint<I, F> lhs, FixedPoint<I, F> rhs,
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typename std::enable_if<type_from_size<I + F>::next_size::is_specialized>::type* = nullptr) {
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std::enable_if_t<type_from_size<I + F>::next_size::is_specialized>* = nullptr) {
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using next_type = typename FixedPoint<I, F>::next_type;
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using base_type = typename FixedPoint<I, F>::base_type;
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@ -210,7 +212,7 @@ constexpr FixedPoint<I, F> multiply(
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template <size_t I, size_t F>
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constexpr FixedPoint<I, F> multiply(
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FixedPoint<I, F> lhs, FixedPoint<I, F> rhs,
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typename std::enable_if<!type_from_size<I + F>::next_size::is_specialized>::type* = nullptr) {
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std::enable_if_t<!type_from_size<I + F>::next_size::is_specialized>* = nullptr) {
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using base_type = typename FixedPoint<I, F>::base_type;
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@ -265,15 +267,16 @@ public:
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static constexpr base_type one = base_type(1) << fractional_bits;
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public: // constructors
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FixedPoint() = default;
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FixedPoint(const FixedPoint&) = default;
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FixedPoint(FixedPoint&&) = default;
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FixedPoint& operator=(const FixedPoint&) = default;
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constexpr FixedPoint() = default;
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template <class Number>
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constexpr FixedPoint(
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Number n, typename std::enable_if<std::is_arithmetic<Number>::value>::type* = nullptr)
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: data_(static_cast<base_type>(n * one)) {}
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constexpr FixedPoint(const FixedPoint&) = default;
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constexpr FixedPoint& operator=(const FixedPoint&) = default;
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constexpr FixedPoint(FixedPoint&&) noexcept = default;
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constexpr FixedPoint& operator=(FixedPoint&&) noexcept = default;
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template <IsArithmetic Number>
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constexpr FixedPoint(Number n) : data_(static_cast<base_type>(n * one)) {}
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public: // conversion
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template <size_t I2, size_t F2>
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@ -301,36 +304,14 @@ public:
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}
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public: // comparison operators
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constexpr bool operator==(FixedPoint rhs) const {
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return data_ == rhs.data_;
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}
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constexpr bool operator!=(FixedPoint rhs) const {
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return data_ != rhs.data_;
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}
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constexpr bool operator<(FixedPoint rhs) const {
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return data_ < rhs.data_;
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}
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constexpr bool operator>(FixedPoint rhs) const {
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return data_ > rhs.data_;
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}
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constexpr bool operator<=(FixedPoint rhs) const {
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return data_ <= rhs.data_;
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}
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constexpr bool operator>=(FixedPoint rhs) const {
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return data_ >= rhs.data_;
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}
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friend constexpr auto operator<=>(FixedPoint lhs, FixedPoint rhs) = default;
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public: // unary operators
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constexpr bool operator!() const {
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[[nodiscard]] constexpr bool operator!() const {
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return !data_;
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}
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constexpr FixedPoint operator~() const {
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[[nodiscard]] constexpr FixedPoint operator~() const {
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// NOTE(eteran): this will often appear to "just negate" the value
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// that is not an error, it is because -x == (~x+1)
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// and that "+1" is adding an infinitesimally small fraction to the
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@ -338,11 +319,11 @@ public: // unary operators
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return FixedPoint::from_base(~data_);
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}
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constexpr FixedPoint operator-() const {
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[[nodiscard]] constexpr FixedPoint operator-() const {
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return FixedPoint::from_base(-data_);
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}
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constexpr FixedPoint operator+() const {
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[[nodiscard]] constexpr FixedPoint operator+() const {
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return FixedPoint::from_base(+data_);
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}
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@ -411,15 +392,13 @@ public: // binary math operators, effects underlying bit pattern since these
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return *this;
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}
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template <class Integer,
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class = typename std::enable_if<std::is_integral<Integer>::value>::type>
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template <IsIntegral Integer>
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constexpr FixedPoint& operator>>=(Integer n) {
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data_ >>= n;
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return *this;
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}
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template <class Integer,
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class = typename std::enable_if<std::is_integral<Integer>::value>::type>
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template <IsIntegral Integer>
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constexpr FixedPoint& operator<<=(Integer n) {
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data_ <<= n;
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return *this;
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@ -430,42 +409,42 @@ public: // conversion to basic types
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data_ += (data_ & fractional_mask) >> 1;
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}
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constexpr int to_int() {
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[[nodiscard]] constexpr int to_int() {
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round_up();
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return static_cast<int>((data_ & integer_mask) >> fractional_bits);
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}
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constexpr unsigned int to_uint() const {
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[[nodiscard]] constexpr unsigned int to_uint() {
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round_up();
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return static_cast<unsigned int>((data_ & integer_mask) >> fractional_bits);
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}
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constexpr int64_t to_long() {
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[[nodiscard]] constexpr int64_t to_long() {
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round_up();
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return static_cast<int64_t>((data_ & integer_mask) >> fractional_bits);
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}
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constexpr int to_int_floor() const {
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[[nodiscard]] constexpr int to_int_floor() const {
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return static_cast<int>((data_ & integer_mask) >> fractional_bits);
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}
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constexpr int64_t to_long_floor() {
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[[nodiscard]] constexpr int64_t to_long_floor() const {
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return static_cast<int64_t>((data_ & integer_mask) >> fractional_bits);
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}
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constexpr unsigned int to_uint_floor() const {
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[[nodiscard]] constexpr unsigned int to_uint_floor() const {
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return static_cast<unsigned int>((data_ & integer_mask) >> fractional_bits);
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}
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constexpr float to_float() const {
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[[nodiscard]] constexpr float to_float() const {
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return static_cast<float>(data_) / FixedPoint::one;
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}
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constexpr double to_double() const {
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[[nodiscard]] constexpr double to_double() const {
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return static_cast<double>(data_) / FixedPoint::one;
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}
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constexpr base_type to_raw() const {
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[[nodiscard]] constexpr base_type to_raw() const {
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return data_;
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}
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@ -473,27 +452,27 @@ public: // conversion to basic types
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data_ &= fractional_mask;
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}
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constexpr base_type get_frac() const {
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[[nodiscard]] constexpr base_type get_frac() const {
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return data_ & fractional_mask;
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}
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public:
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constexpr void swap(FixedPoint& rhs) {
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constexpr void swap(FixedPoint& rhs) noexcept {
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using std::swap;
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swap(data_, rhs.data_);
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}
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public:
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base_type data_;
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base_type data_{};
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};
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// if we have the same fractional portion, but differing integer portions, we trivially upgrade the
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// smaller type
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template <size_t I1, size_t I2, size_t F>
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constexpr typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type operator+(
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constexpr std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>> operator+(
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FixedPoint<I1, F> lhs, FixedPoint<I2, F> rhs) {
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using T = typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type;
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using T = std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>;
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const T l = T::from_base(lhs.to_raw());
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const T r = T::from_base(rhs.to_raw());
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@ -501,10 +480,10 @@ constexpr typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2,
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}
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template <size_t I1, size_t I2, size_t F>
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constexpr typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type operator-(
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constexpr std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>> operator-(
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FixedPoint<I1, F> lhs, FixedPoint<I2, F> rhs) {
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using T = typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type;
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using T = std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>;
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const T l = T::from_base(lhs.to_raw());
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const T r = T::from_base(rhs.to_raw());
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@ -512,10 +491,10 @@ constexpr typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2,
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}
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template <size_t I1, size_t I2, size_t F>
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constexpr typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type operator*(
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constexpr std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>> operator*(
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FixedPoint<I1, F> lhs, FixedPoint<I2, F> rhs) {
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using T = typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type;
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using T = std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>;
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const T l = T::from_base(lhs.to_raw());
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const T r = T::from_base(rhs.to_raw());
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@ -523,10 +502,10 @@ constexpr typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2,
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}
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template <size_t I1, size_t I2, size_t F>
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constexpr typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type operator/(
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constexpr std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>> operator/(
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FixedPoint<I1, F> lhs, FixedPoint<I2, F> rhs) {
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using T = typename std::conditional<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>::type;
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using T = std::conditional_t<I1 >= I2, FixedPoint<I1, F>, FixedPoint<I2, F>>;
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const T l = T::from_base(lhs.to_raw());
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const T r = T::from_base(rhs.to_raw());
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@ -561,54 +540,46 @@ constexpr FixedPoint<I, F> operator/(FixedPoint<I, F> lhs, FixedPoint<I, F> rhs)
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return lhs;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator+(FixedPoint<I, F> lhs, Number rhs) {
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lhs += FixedPoint<I, F>(rhs);
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return lhs;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator-(FixedPoint<I, F> lhs, Number rhs) {
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lhs -= FixedPoint<I, F>(rhs);
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return lhs;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator*(FixedPoint<I, F> lhs, Number rhs) {
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lhs *= FixedPoint<I, F>(rhs);
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return lhs;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator/(FixedPoint<I, F> lhs, Number rhs) {
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lhs /= FixedPoint<I, F>(rhs);
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return lhs;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator+(Number lhs, FixedPoint<I, F> rhs) {
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FixedPoint<I, F> tmp(lhs);
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tmp += rhs;
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return tmp;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator-(Number lhs, FixedPoint<I, F> rhs) {
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FixedPoint<I, F> tmp(lhs);
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tmp -= rhs;
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return tmp;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator*(Number lhs, FixedPoint<I, F> rhs) {
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FixedPoint<I, F> tmp(lhs);
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tmp *= rhs;
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return tmp;
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}
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template <size_t I, size_t F, class Number,
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class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
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template <size_t I, size_t F, IsArithmetic Number>
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constexpr FixedPoint<I, F> operator/(Number lhs, FixedPoint<I, F> rhs) {
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FixedPoint<I, F> tmp(lhs);
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tmp /= rhs;
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@ -616,78 +587,64 @@ constexpr FixedPoint<I, F> operator/(Number lhs, FixedPoint<I, F> rhs) {
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}
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// shift operators
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template <size_t I, size_t F, class Integer,
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class = typename std::enable_if<std::is_integral<Integer>::value>::type>
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template <size_t I, size_t F, IsIntegral Integer>
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constexpr FixedPoint<I, F> operator<<(FixedPoint<I, F> lhs, Integer rhs) {
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lhs <<= rhs;
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return lhs;
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}
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template <size_t I, size_t F, class Integer,
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class = typename std::enable_if<std::is_integral<Integer>::value>::type>
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template <size_t I, size_t F, IsIntegral Integer>
|
||||
constexpr FixedPoint<I, F> operator>>(FixedPoint<I, F> lhs, Integer rhs) {
|
||||
lhs >>= rhs;
|
||||
return lhs;
|
||||
}
|
||||
|
||||
// comparison operators
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator>(FixedPoint<I, F> lhs, Number rhs) {
|
||||
return lhs > FixedPoint<I, F>(rhs);
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator<(FixedPoint<I, F> lhs, Number rhs) {
|
||||
return lhs < FixedPoint<I, F>(rhs);
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator>=(FixedPoint<I, F> lhs, Number rhs) {
|
||||
return lhs >= FixedPoint<I, F>(rhs);
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator<=(FixedPoint<I, F> lhs, Number rhs) {
|
||||
return lhs <= FixedPoint<I, F>(rhs);
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator==(FixedPoint<I, F> lhs, Number rhs) {
|
||||
return lhs == FixedPoint<I, F>(rhs);
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator!=(FixedPoint<I, F> lhs, Number rhs) {
|
||||
return lhs != FixedPoint<I, F>(rhs);
|
||||
}
|
||||
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator>(Number lhs, FixedPoint<I, F> rhs) {
|
||||
return FixedPoint<I, F>(lhs) > rhs;
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator<(Number lhs, FixedPoint<I, F> rhs) {
|
||||
return FixedPoint<I, F>(lhs) < rhs;
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator>=(Number lhs, FixedPoint<I, F> rhs) {
|
||||
return FixedPoint<I, F>(lhs) >= rhs;
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator<=(Number lhs, FixedPoint<I, F> rhs) {
|
||||
return FixedPoint<I, F>(lhs) <= rhs;
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator==(Number lhs, FixedPoint<I, F> rhs) {
|
||||
return FixedPoint<I, F>(lhs) == rhs;
|
||||
}
|
||||
template <size_t I, size_t F, class Number,
|
||||
class = typename std::enable_if<std::is_arithmetic<Number>::value>::type>
|
||||
template <size_t I, size_t F, IsArithmetic Number>
|
||||
constexpr bool operator!=(Number lhs, FixedPoint<I, F> rhs) {
|
||||
return FixedPoint<I, F>(lhs) != rhs;
|
||||
}
|
||||
|
|
|
|||
Reference in New Issue