E.V.E
v2023.02.15
 
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◆ maxmag

auto eve::maxmag = functor<maxmag_t>
inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
// Regular overloads
constexpr auto maxmag(eve::value auto x, eve::value auto ... xs) noexcept; // 1
constexpr auto maxmag(kumi::non_empty_product_type auto const& tup) noexcept; // 2
// Lanes masking
constexpr auto maxmag[conditional_expr auto c](/* any of the above overloads */) noexcept; // 3
constexpr auto maxmag[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 maxmag[pedantic](/* any of the above overloads */) noexcept; // 4
constexpr auto maxmag[numeric ](/* any of the above overloads */) noexcept; // 4
}
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 maxmag
Computes the value for which the maximum of the absolute value of its arguments is obtained.
Definition maxmag.hpp:89
EVE Main Namespace.
Definition abi.hpp:18

Parameters

Return value

  1. The element of greatest absolute value is returned. For instance for two elements:
    • If |x| > |y|, x is returned.
    • If |x| < |y|, y is returned.
    • Otherwise max(x, y) is returned. For n parameters the result is computed as if this scheme was recursively used.
  2. equivalent to the call on the elements of the tuple.
  3. The operation is performed conditionnaly
  4. The behaviour of eve::maxmag[o](x, y) (where o is one of these two options) is identical except that if |x| == |y|, max[o] is used.

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 << "-> maxmag(wf0, wf1) = " << eve::maxmag(wf0, wf1) << "\n";
std::cout << "-> maxmag[ignore_last(2)](wf0, wf1) = " << eve::maxmag[eve::ignore_last(2)](wf0, wf1) << "\n";
std::cout << "-> maxmag[wf0 != 0](wf0, wf1) = " << eve::maxmag[wf0 != 0](wf0, wf1) << "\n";
std::cout << "-> maxmag[pedantic](wf0, wf1) = " << eve::maxmag[eve::pedantic](wf0, wf1) << "\n";
std::cout << "-> maxmag[numeric ](wf0, wf1) = " << eve::maxmag[eve::numeric ](wf0, wf1) << "\n";
std::cout << "-> maxmag(wu0, wu1) = " << eve::maxmag(wu0, wu1) << "\n";
std::cout << "-> maxmag(wi0, wi1) = " << eve::maxmag(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