check_rsqrt_impl< T > Struct Template Reference

Static Public Member Functions
static void	run ()

Member Function Documentation

run()

template<typename T >

static void check_rsqrt_impl< T >::run ( )

inlinestatic

                    {
    const T zero = T(0);
    const T one = T(1);
    const T inf = std::numeric_limits<T>::infinity();
    const T nan = std::numeric_limits<T>::quiet_NaN();
 
    for (int i = 0; i < 1000; ++i) {
      const T x = numext::abs(internal::random<T>());
      const T rsqrtx = numext::rsqrt(x);
      const T invx = one / x;
      VERIFY_IS_APPROX(rsqrtx * rsqrtx, invx);
    }
 
    // Corner cases.
    VERIFY_IS_EQUAL(numext::rsqrt(zero), inf);
    VERIFY_IS_EQUAL(numext::rsqrt(inf), zero);
    VERIFY((numext::isnan)(numext::rsqrt(nan)));
    VERIFY((numext::isnan)(numext::rsqrt(-one)));
  }

References abs(), i, constants::inf, isnan, Eigen::numext::rsqrt(), VERIFY, VERIFY_IS_APPROX, VERIFY_IS_EQUAL, plotDoE::x, and zero().

Referenced by check_rsqrt().

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The documentation for this struct was generated from the following file:

• numext.cpp