compare_absolute

auto eve::compare_absolute = functor<compare_absolute_t>

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   // Regular overload
   constexpr auto compare_absolute(value auto x, auto f) noexcept;                                        // 1
   constexpr auto compare_absolute(value auto x, value auto y, auto f) noexcept;                          // 1
 
   // Lanes masking
   constexpr auto compare_absolute[conditional_expr auto c](value auto x, value auto y, auto f) noexcept; // 2
   constexpr auto compare_absolute[logical_value auto m](value auto x, value auto y, auto f)    noexcept; // 2
   constexpr auto compare_absolute[conditional_expr auto c](value auto x, auto f)               noexcept; // 2
   constexpr auto compare_absolute[logical_value auto m](value auto x, auto f)                  noexcept; // 2
 
   // Semantic options
   constexpr auto compare_absolute[saturated](value auto x, auto f)                             noexcept; // 3
   constexpr auto compare_absolute[saturated](value auto x, value auto y, auto f)               noexcept; // 3
}

Parameters

• x, y: arguments.
• f: one or two parameter predicate according to y presence.
• c: Conditional expression masking the operation.
• m: Logical value masking the operation.

Return value

1. The call eve::compare_absolute(x,y,f) is semantically equivalent to f(abs(x), abs(y)) and eve::compare_absolute(x,f) is semantically equivalent to f(abs(x)) and
2. The operation is performed conditionnaly.
3. the option is transfered to 'abs' in the call.

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