cotd

auto eve::cotd = functor<cotd_t>

inlineconstexpr

Header file

#include <eve/module/math.hpp>

Callable Signatures

namespace eve
{
   // Regular overload
   constexpr auto cotd(floating_value auto x)                          noexcept; // 1
 
   // Lanes masking
   constexpr auto cotd[conditional_expr auto c](floating_value auto x) noexcept; // 2
   constexpr auto cotd[logical_value auto m](floating_value auto x)    noexcept; // 2
 
   // Semantic options
   constexpr auto cotd[quarter_circle](floating_value auto x)          noexcept; // 3
}

Parameters

• x:floating real value.
• c: Conditional expression masking the operation.
• m: Logical value masking the operation.

Return value

1. Returns the elementwise cosine of the input expressed in degrees. In particular:
   • If the element is \(\pm0\), \(\pm\infty\) is returned.
   • If the element is \(\pm\infty\), Nan is returned.
   • If the element is a Nan, Nan is returned.
2. The operation is performed conditionnaly.
3. Assumes that the inputs elements belong to \([-45,45]\) and return NaN outside.

Example

// revision 1
#include <eve/module/math.hpp>
#include <iostream>
 
int main()
{
  eve::wide wf = {0.0, 0.25, 0.4, 2.2, -0.0, -0.25, -0.4, -2.2};
  wf *= 180;
 
  std::cout << "<- wf                      = " << wf << "\n";
 
  std::cout << "-> cotd(wf)                = " << eve::cotd(wf) << "\n";
  std::cout << "-> cotd[ignore_last(2)](wf)= " << eve::cotd[eve::ignore_last(2)](wf) << "\n";
  std::cout << "-> cotd[wf != -2.0f](wf)   = " << eve::cotd[wf != -2.0f](wf) << "\n";
  std::cout << "-> cotd[quarter_circle](wf)= " << eve::cotd[eve::quarter_circle](wf) << "\n";
}