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Mathematical constants¶

Defined in header <Kokkos_MathematicalConstants.hpp> which is included from <Kokkos_Core.hpp>

Provides all mathematical constants from <numbers> (since C++20).

All constants are defined in the Kokkos::numbers:: namespace since version 4.0, in Kokkos::Experimental in previous versions.

Mathematical constants

e log2e log10e pi inv_pi inv_sqrtpi ln2 ln10 sqrt2 sqrt3 inv_sqrt3 egamma phi

Notes¶

The mathematical constants are available in Kokkos::Experimental:: since Kokkos 3.6
They were “promoted” to the Kokkos::numbers namespace in 4.0 and removed from Kokkos::Experimental:: in 4.3
Passing mathematical constants by reference or taking their address in device code is not supported by some toolchains and hence not portable. (See known issues)
Support for quadruple precision floating-point __float128 can be enabled via -DKokkos_ENABLE_LIBQUADMATH=ON.

Example¶

KOKKOS_FUNCTION void example() {
    constexpr auto pi = Kokkos::numbers::pi_v<float>;
    auto const x = Kokkos::sin(pi/6);
}