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(eve::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
}

Parameters

• x, xs...: real arguments.
• tup: non empty tuple of arguments.
• c: Conditional expression masking the operation.
• m: Logical value masking the operation.

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";
}