E.V.E
v2023.02.15
 
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◆ maxabs

auto eve::maxabs = functor<maxabs_t>
inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
// Regular overloads
constexpr auto maxabs(eve::value auto x, eve::value auto ... xs) noexcept; // 1
constexpr auto maxabs(kumi::non_empty_product_type auto const& tup) noexcept; // 2
// Lanes masking
constexpr auto maxabs[conditional_expr auto c](/* any of the above overloads */) noexcept; // 3
constexpr auto maxabs[logical_value auto m](/* any of the above overloads */) noexcept; // 3
// Exclusive Semantic options - Only one of those can be set at once
constexpr auto maxabs[pedantic](/* any of the above overloads */) noexcept; // 4
constexpr auto maxabs[numeric ](/* any of the above overloads */) noexcept; // 5
}
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 maxabs
Computes the maximum of the absolute value norm ( ) of its arguments.
Definition maxabs.hpp:87
EVE Main Namespace.
Definition abi.hpp:18

Parameters

Return value

  1. the value of the maximum of the absolute values is returned. If one of the elements is NaN the result is system dependant.
  2. equivalent to the call on the elements of the tuple.
  3. The operation is performed conditionnaly
  4. Ensures conformity to the standard. That is for two parameters to be equivalent to: (|x| < |y|) ? |y| : |x| and this behaviour is also ensured on n parameters calls as if this scheme is recursively used.
  5. NaNs are considered less than anything else.

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 wf1{0.0, -4.0, 1.0, -1.0, 2.0, -2.0, 3.0, -3.0};
eve::wide wi0{0, 1, 2, 3, -1, -2, -3, -4};
eve::wide wi1{0, -4, 1, -1, 2, -2, 3, -3};
eve::wide wu0{0u, 1u, 2u, 3u, 4u, 5u, 6u, 7u};
eve::wide wu1{7u, 6u, 5u, 4u, 3u, 2u, 1u, 0u};
std::cout << "<- wf0 = " << wf0 << "\n";
std::cout << "<- wf1 = " << wf1 << "\n";
std::cout << "<- wi0 = " << wi0 << "\n";
std::cout << "<- wi1 = " << wi1 << "\n";
std::cout << "<- wu0 = " << wu0 << "\n";
std::cout << "<- wu1 = " << wu1 << "\n";
std::cout << "-> maxabs(wf0, wf1) = " << eve::maxabs(wf0, wf1) << "\n";
std::cout << "-> maxabs[ignore_last(2)](wf0, wf1) = " << eve::maxabs[eve::ignore_last(2)](wf0, wf1) << "\n";
std::cout << "-> maxabs[wf0 != 0](wf0, wf1) = " << eve::maxabs[wf0 != 0](wf0, wf1) << "\n";
std::cout << "-> maxabs[pedantic](wf0, wf1) = " << eve::maxabs[eve::pedantic](wf0, wf1) << "\n";
std::cout << "-> maxabs[numeric ](wf0, wf1) = " << eve::maxabs[eve::numeric ](wf0, wf1) << "\n";
std::cout << "-> maxabs(wu0, wu1) = " << eve::maxabs(wu0, wu1) << "\n";
std::cout << "-> maxabs(wi0, wi1) = " << eve::maxabs(wi0, wi1) << "\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