E.V.E
v2023.02.15
 
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◆ nearest

auto eve::nearest = functor<nearest_t>
inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
// Regular overload
constexpr auto nearest(value auto x) noexcept; // 1
// Lanes masking
constexpr auto nearest[conditional_expr auto c](value auto x) noexcept; // 2
constexpr auto nearest[logical_value auto m](value auto x) 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 value<T> is satisfied if and only if T satisfies either eve::scalar_value or eve::simd_va...
Definition value.hpp:34
constexpr auto nearest
strict_elementwise_callable object computing the nearest integer to the input.
Definition nearest.hpp:79
EVE Main Namespace.
Definition abi.hpp:18
  • x :value argument.
  • c: Conditional expression masking the operation.
  • m: Logical value masking the operation.
  • ‘tol’ scalar_value tolerance. ! ! Return value ! ! 1. the integer nearest to x. If x is an exact half-integer the rounding is made to the ! nearest even integer.The smallest integer not less than x. ! The standard proposes 4 rounding modes namely: FE_TONEAREST, FE_DOWNWARD, FE_UPWARD, ! FE_TOWARDZERO. This function object implements the FE_TONEAREST version.
  1. The operation is performed conditionnaly.

External references

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};
eve::wide wu0{0u, 1u, 2u, 3u, 4u, 5u, 6u, 7u};
std::cout << "<- wf0 = " << wf0 << "\n";
std::cout << "<- wi0 = " << wi0 << "\n";
std::cout << "<- wu0 = " << wu0 << "\n";
std::cout << "-> nearest(wf0) = " << eve::nearest(wf0) << "\n";
std::cout << "-> nearest[ignore_last(2)](wf0) = " << eve::nearest[eve::ignore_last(2)](wf0) << "\n";
std::cout << "-> nearest[wf0 != 0](wf0) = " << eve::nearest[wf0 != 0](wf0) << "\n";
std::cout << "-> nearest(wu0) = " << eve::nearest(wu0) << "\n";
std::cout << "-> nearest[ignore_last(2)](wu0) = " << eve::nearest[eve::ignore_last(2)](wu0) << "\n";
std::cout << "-> nearest[wu0 != 0](wu0) = " << eve::nearest[wu0 != 0](wu0) << "\n";
std::cout << "-> nearest(wi0) = " << eve::nearest(wi0) << "\n";
std::cout << "-> nearest[ignore_last(2)](wi0) = " << eve::nearest[eve::ignore_last(2)](wi0) << "\n";
std::cout << "-> nearest[wi0 != 0](wi0) = " << eve::nearest[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