JPL::Math::Detail Namespace Reference

Square Root. More...

Functions
template<std::floating_point T>
constexpr T	QNan () noexcept
	constexpr-friendly quiet NaN (IEEE-754 only)
template<std::floating_point T>
constexpr T	InvSqrtInitialGuess (T x) noexcept
template<std::floating_point T, int NR>
constexpr T	InvSqrtNewtonRefine (T x, T y) noexcept
	Scalar NR on inverse sqrt.
template<std::floating_point T, int NR>
constexpr T	SqrtConstevalFallback (T x) noexcept
	Pure constexpr fallback sqrt using inverse-sqrt NR.

Detailed Description

Square Root.

Function Documentation

InvSqrtInitialGuess()

template<std::floating_point T>

constexpr T JPL::Math::Detail::InvSqrtInitialGuess ( T  x )

constexprnoexcept

Initial guess for invsqrt (constexpr-friendly):

• float: use the classic "Quake" bit trick.

InvSqrtNewtonRefine()

template<std::floating_point T, int NR>

constexpr T JPL::Math::Detail::InvSqrtNewtonRefine ( T  x, T  y  )

constexprnoexcept

Scalar NR on inverse sqrt.

QNan()

template<std::floating_point T>

constexpr T JPL::Math::Detail::QNan ( )

constexprnoexcept

constexpr-friendly quiet NaN (IEEE-754 only)

SqrtConstevalFallback()

template<std::floating_point T, int NR>

constexpr T JPL::Math::Detail::SqrtConstevalFallback ( T  x )

constexprnoexcept

Pure constexpr fallback sqrt using inverse-sqrt NR.