E.V.E
v2023.02.15
 
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◆ exp_int

auto eve::exp_int = functor<exp_int_t>
inlineconstexpr

Header file

#include <eve/module/special.hpp>

Callable Signatures

namespace eve
{
// Regular overload
constexpr auto exp_int(floating_value auto x) noexcept; // 1
constexpr auto exp_int(unsigned_value auto n, floating_value auto x) noexcept; // 2
// Lanes masking
constexpr auto exp_int[conditional_expr auto c](/*any of the above overloads*/) noexcept; // 3
constexpr auto exp_int[logical_value auto m](/*any of the above overloads*/) noexcept; // 3
}
Specifies that a type is a Conditional Expression.
Definition conditional.hpp:28
The concept floating_value<T> is satisfied if and only if T satisfies eve::value and the element type...
Definition value.hpp:116
The concept logical_value<T> is satisfied if and only if T satisfies eve::value and the element type ...
Definition value.hpp:132
The concept unsigned_value<T> is satisfied if and only if T satisfies eve::value and the element type...
Definition value.hpp:84
constexpr auto exp_int
elementwise_callable object computing the exponential integral .
Definition exp_int.hpp:83
EVE Main Namespace.
Definition abi.hpp:18

Parameters

Return value

  1. The value of the exponential integral \( \mathbf{E}_n(x) = \displaystyle \int_1^\infty \frac{e^{-xt}}{t^n}\;\mbox{d}t\), is returned.
  2. The operation is performed conditionnaly.

External references

Example

// revision 1
#include <eve/module/special.hpp>
#include <iostream>
int main()
{
eve::wide wf = {0.5, 1.5, 0.1, 1.0, 19.0, 25.0, 21.5, 10000.0};
eve::wide wi = {0, 1, 5, -2, 10, 6000, 0, 2};
std::cout << "<- wf = " << wf << "\n";
std::cout << "<- wi = " << wi << "\n";
std::cout << "-> exp_int(wf) = " << eve::exp_int(wf) << "\n";
std::cout << "-> exp_int(wi, wf) = " << eve::exp_int(wi, wf) << "\n";
std::cout << "-> exp_int[ignore_last(2)](wf)= " << eve::exp_int[eve::ignore_last(2)](wf) << "\n";
std::cout << "-> exp_int[wf< 25.0](wf) = " << eve::exp_int[wf < 25.0](wf) << "\n";
}
Conditional expression ignoring the k last lanes from a eve::simd_value.
Definition conditional.hpp:332
Wrapper for SIMD registers.
Definition wide.hpp:70