Class expr

dnn/include/megdnn/dtype/bfloat16.hpp:197–212

Temporary bfloat16 expression. This class represents a bfloat16 expression which just stores a single-precision value internally.

/// This class represents a bfloat16 expression which just stores a
/// single-precision value internally.
struct expr {
    /// Conversion constructor.
    /// \param f single-precision value to convert
    MEGDNN_HOST MEGDNN_DEVICE explicit HALF_CONSTEXPR expr(float f)
            : value_(f) {}

    /// Conversion to single-precision.
    /// \return single precision value representing expression value
    MEGDNN_HOST MEGDNN_DEVICE HALF_CONSTEXPR operator float() const {
        return value_;
    }

private:
    /// Internal expression value stored in single-precision.
    float value_;
};

/// SFINAE helper for generic bfloat16 functions.
/// This class template has to be specialized for each valid combination of