negmaxabs

auto eve::negmaxabs = functor<negmaxabs_t>

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   // Regular overloads
   constexpr auto negmaxabs(eve::value auto x, eve::value auto ... xs)                 noexcept; // 1
   constexpr auto negmaxabs(kumi::non_empty_product_type auto const& tup)              noexcept; // 2
 
   // Lanes masking
   constexpr auto negmaxabs[conditional_expr auto c](/* any of the above overloads */) noexcept; // 3
   constexpr auto negmaxabs[logical_value auto m](/* any of the above overloads */)    noexcept; // 3
 
   // Semantic option
   constexpr auto negmaxabs[saturated](/* any of the above overloads */)               noexcept; // 4
 
   // Exclusive Semantic options - Only one of those can be set at once
   constexpr auto negmaxabs[pedantic](/* any of the above overloads */)                noexcept; // 5.1
   constexpr auto negmaxabs[numeric ](/* any of the above overloads */)                noexcept; // 5.2
}

Parameters

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

Return value

The negated value of the element of maximal absolute value is returned.

1. If any element of the inputs is a NaN the corresponding output element is system-dependent
2. equivalent to the call on the elements of the tuple.
3. The operation is performed conditionnaly
4. computation internally uses abs[saturated] instead of abs
5. with numeric (resp. pedantic) max[numeric] (5.1) (resp. max[pedantic] (5.2)) is used internally

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