bit_shl

eve::bit_shl = functor<shl_t>

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   // Regular overload
   constexpr auto bit_shl(integral_value auto, x integral_value auto n)                          noexcept; // 1
 
   // Lanes masking
   constexpr auto bit_shl[conditional_expr auto c](integral_value auto x, integral_value auto n) noexcept; // 2
   constexpr auto bit_shl[logical_value auto m](integral_value auto x, integral_value auto n)    noexcept; // 2
}

Parameters

• x: argument(eve::integral_value). to be shifted.
• n: shift.
• c: Conditional expression masking the operation.
• m: Logical value masking the operation.

Return value

1. The value of the logical left shift is returned.
2. The operation is performed conditionnaly.

Note

• The call bit_shl(x, n) is equivalent to x << n if x is an simd value.
• The types must share the same cardinal or be scalar and if \(N\) is the size in bits of the element type of x, all elements of n must belong to the interval \([0, N[\) or the result is undefined.

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
 
int main()
{
  eve::wide wi0{0, 1, 2, 3, -1, -2, -3, -4};
  eve::wide wi1{0, 4, 1, 1, 2, 2, 3, 3};
  eve::wide wi2{0, -4, 1, -1, 2, -2, 3, -3};
 
  std::cout << "<- wi0                               = " << wi0 << "\n";
  std::cout << "<- wi1                               = " << wi1 << "\n";
  std::cout << "<- wi2                               = " << wi2 << "\n";
                                                     
  std::cout << "-> bit_shl(wi0, wi1)                 = " << eve::bit_shl(wi0, wi1) << "\n";
  std::cout << "-> bit_shl[ignore_last(2)](wi0, wi1) = " << eve::bit_shl[eve::ignore_last(2)](wi0, wi1) << "\n";
  std::cout << "-> bit_shl[wi2 > 0](wi0, wi2)       = " << eve::bit_shl[wi2 > 0](wi0, wi2) << "\n";
}