decimal32_t
Description
decimal32_t is the 32-bit version of the decimal interchange format, and has the following properties as defined in IEEE 754-2019 table 3.6
Attribute |
values |
Storage Width |
32 bits |
Precision |
7 decimal digits |
Max exponent |
96 |
Max Value |
9.999999e+96 |
Smallest Normalized Value |
1.000000e-95 |
Smallest Subnormal Value |
1e-101 |
The encoding of decimal32_t is in the BID format.
#include <boost/decimal/decimal32_t.hpp>
namespace boost {
namespace decimal {
class decimal32_t {
public:
using significand_type = std::uint32_t;
using exponent_type = std::uint32_t;
using biased_exponent_type = std::int32_t;
// Paragraph numbers are from ISO/IEC DTR 24733
// 3.2.2.1 construct/copy/destroy
constexpr decimal32_t() noexcept = default;
// 3.2.2.2 Conversion form floating-point type
template <typename Float>
explicit BOOST_DECIMAL_CXX20_CONSTEXPR decimal32_t(Float val) noexcept;
// 3.2.2.3 Conversion from integral type
template <typename Integer>
explicit constexpr decimal32_t(Integer val) noexcept;
template <typename UnsignedIntegral, typename Integral>
constexpr decimal32_t(UnsignedIntegral coeff, Integral exp, bool sign = false) noexcept;
template <typename SignedIntegral, typename Integral>
constexpr decimal32_t(SignedIntegral coeff, Integral exp) noexcept;
template <typename Integral>
constexpr decimal32_t& operator=(const Integeral& RHS) noexcept;
// 3.2.2.4 Conversion to integral type
// If the value exceeds the range of the integral,
// or is non-finite std::numeric_limits::max() is returned
explicit constexpr operator int() const noexcept;
explicit constexpr operator unsigned() const noexcept;
explicit constexpr operator long() const noexcept;
explicit constexpr operator unsigned long() const noexcept;
explicit constexpr operator long long() const noexcept;
explicit constexpr operator unsigned long long() const noexcept;
// 3.2.2.5 increment and decrement operators:
constexpr decimal32_t& operator++();
constexpr decimal32_t operator++(int);
constexpr decimal32_t& operator--();
constexpr decimal32_t operator--(int);
// 3.2.2.6 compound assignment:
constexpr decimal32_t& operator+=(RHS rhs);
constexpr decimal32_t& operator-=(RHS rhs);
constexpr decimal32_t& operator*=(RHS rhs);
constexpr decimal32_t& operator/=(RHS rhs);
// 3.2.6 Conversion to floating-point type
explicit BOOST_DECIMAL_CXX20_CONSTEXPR operator float() const noexcept;
explicit BOOST_DECIMAL_CXX20_CONSTEXPR operator double() const noexcept;
explicit BOOST_DECIMAL_CXX20_CONSTEXPR operator long double() const noexcept;
// The following are available assuming a C++23 compiler that provides the header <stdfloat>
explicit constexpr operator std::float16_t() const noexcept;
explicit constexpr operator std::float32_t() const noexcept;
explicit constexpr operator std::float64_t() const noexcept;
explicit constexpr operator std::bfloat16_t() const noexcept;
explicit constexpr operator decimal64_t() const noexcept;
explicit constexpr operator decimal128_t() const noexcept;
}; // class decimal32_t
} //namespace decimal
} //namespace boost