E.V.E
v2023.02.15
 
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◆ cscpi

eve::cscpi = functor<cscpi_t>
inlineconstexpr

Header file

#include <eve/module/math.hpp>

Callable Signatures

namespace eve
{
// Regular overload
constexpr auto cscpi(floating_value auto x) noexcept; // 1
// Lanes masking
constexpr auto cscpi[conditional_expr auto c](floating_value auto x) noexcept; // 2
constexpr auto cscpi[logical_value auto m](floating_value auto x) noexcept; // 2
// Semantic options
constexpr auto cscpi[quarter_circle](floating_value auto x) noexcept; // 3
}
Specifies that a type is a Conditional Expression.
Definition: conditional.hpp:27
The concept floating_value<T> is satisfied if and only if T satisfies eve::value and the element type...
Definition: value.hpp:95
The concept logical_value<T> is satisfied if and only if T satisfies eve::value and the element type ...
Definition: value.hpp:107
constexpr quarter_circle_type const quarter_circle
Higher-order Callable Object imbuing a limited range semantic onto other Callable Objects.
Definition: trigo_tags.hpp:159
constexpr auto cscpi
elementwise_callable object computing the cosecant in multiples.
Definition: cscpi.hpp:74
EVE Main Namespace.
Definition: abi.hpp:18

Parameters

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

Return value

  1. The call cscpi(x) is semantically equivalent to \(\csc(\pi x)\). 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.

Example

// revision 1
#include <eve/module/math.hpp>
#include <iostream>
int main()
{
eve::wide wf = {0.0, 0.23, 0.3, 2.0, -0.0, -0.23, -0.3, -2.0};
std::cout << "<- wf = " << wf << "\n";
std::cout << "-> cscpi(wf) = " << eve::cscpi(wf) << "\n";
std::cout << "-> cscpi[ignore_last(2)](wf)= " << eve::cscpi[eve::ignore_last(2)](wf) << "\n";
std::cout << "-> cscpi[wf != -2.0f](wf) = " << eve::cscpi[wf != -2.0f](wf) << "\n";
std::cout << "-> cscpi[quarter_circle](wf)= " << eve::cscpi[eve::quarter_circle](wf) << "\n";
}
Conditional expression ignoring the k last lanes from a eve::simd_value.
Definition: conditional.hpp:304
Wrapper for SIMD registers.
Definition: wide.hpp:71