bit_and

auto eve::bit_and = functor<bit_and_t>

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   // Regular overloads
   constexpr auto bit_and(value auto x, value auto ... xs)                          noexcept; // 1
   constexpr auto bit_and(kumi::non_empty_product_type auto const& tup)             noexcept; // 2
 
   // Lanes masking
   constexpr auto bit_and[conditional_expr auto c](/*any of the above overloads*/)  noexcept; // 3
   constexpr auto bit_and[logical_value auto m](/*any of the above overloads*/)     noexcept; // 3
}

Parameters

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

Return value

1. The value of the bitwise AND of its arguments converted to the common bit_value of the arguments
2. equivalent to the call on the elements of the tuple.
3. The operation is performed conditionnaly.

Note

Although the infix notation with & is supported for two parameters, the & operator on standard scalar types is the original one and so can lead to automatic promotion. Moreover, and due to C++ limitations is not available for floating point scalar entries.

External reference

• Wikipedia

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