E.V.E
v2023.02.15
 
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◆ sign_alternate

auto eve::sign_alternate = functor<sign_alternate_t>
inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
// Regular overload
constexpr auto sign_alternate(signed_value auto n) noexcept; // 1
// Lanes masking
constexpr auto sign_alternate[conditional_expr auto c](signed_value auto n) noexcept; // 2
constexpr auto sign_alternate[logical_value auto m](signed_value auto n) noexcept; // 2
}
Specifies that a type is a Conditional Expression.
Definition conditional.hpp:28
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 signed_value<T> is satisfied if and only if T satisfies eve::value and the element type s...
Definition value.hpp:68
constexpr auto sign_alternate
Computes .
Definition sign_alternate.hpp:72
EVE Main Namespace.
Definition abi.hpp:18

Parameters

Return value

  1. elementwise \((-1)^n\) is returned.
  2. The operation is performed conditionnaly.

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
int main()
{
eve::wide wf0{0.0, 1.0, 2.0, 3.0, -1.0, -2.0, -3.0, -4.0};
eve::wide wi0{0, 1, 2, 3, -1, -2, -3, -4};
std::cout << "<- wf0 = " << wf0 << "\n";
std::cout << "<- wi0 = " << wi0 << "\n";
std::cout << "-> sign_alternate(wf0) = " << eve::sign_alternate(wf0) << "\n";
std::cout << "-> sign_alternate[ignore_last(2)](wf0) = " << eve::sign_alternate[eve::ignore_last(2)](wf0) << "\n";
std::cout << "-> sign_alternate[wf0 != 0](wf0) = " << eve::sign_alternate[wf0 != 0](wf0) << "\n";
std::cout << "-> sign_alternate(wi0) = " << eve::sign_alternate(wi0) << "\n";
std::cout << "-> sign_alternate[ignore_last(2)](wi0) = " << eve::sign_alternate[eve::ignore_last(2)](wi0) << "\n";
std::cout << "-> sign_alternate[wi0 != 0](wi0) = " << eve::sign_alternate[wi0 != 0](wi0) << "\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