E.V.E
v2022.09.01

◆ is_not_less

eve::is_not_less = {}
inlineconstexpr

Returns a logical true if and only if the element value of the first parameter is not less than the second one.

Defined in Header

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
template< eve::value T, eve::value U >
eve::as_logical<T> is_not_less(T x,U y) noexcept;
}
constexpr callable_is_not_less_ is_not_less
Returns a logical true if and only if the element value of the first parameter is not less than the s...
Definition: is_not_less.hpp:76
Definition: all_of.hpp:22

Parameters

Return value

The call eve::is_not_less(x,y) is semantically equivalent to !(x < y):

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
int main()
{
wide_ft pf = {0.0f, 1.0f, -1.0f, -2.0f};
wide_ft qf = {1.0f, -1.0f, 0.0f, -2.0f};
std::cout << "---- simd" << '\n'
<< "<- pf = " << pf << '\n'
<< "<- qf = " << qf << '\n'
<< "-> is_not_less(pf, qf) = " << eve::is_not_less(pf, qf) << '\n';
float xf = 1.0f;
float yf = 2.0f;
std::cout << "---- scalar" << '\n'
<< "<- xf = " << xf << '\n'
<< "<- yf = " << yf << '\n'
<< "-> is_not_less(xf, yf) = " << eve::is_not_less(xf, yf) << '\n';
return 0;
}
Wrapper for SIMD registers.
Definition: wide.hpp:65

Semantic Modifiers

  • Masked Call

    The call eve;is_not_less[mask](x,y) provides a masked version of eve::is_not_less which is equivalent to if_else (mask, is_not_less(x), eve::false( eve::as(x,y))).

    Example

    #include <eve/module/core.hpp>
    #include <eve/wide.hpp>
    #include <iostream>
    int main()
    {
    wide_ft pf = {0.0f, 1.0f, -1.0f, 2.0f};
    wide_ft qf = {1.0f, -1.0f, 0.0f, 3.0f};
    std::cout << "---- simd" << '\n'
    << "<- pf = " << pf << '\n'
    << "<- qf = " << qf << '\n'
    << "-> is_not_less[pf > 0](pf, qf) = " << eve::is_not_less[pf > 0](pf, qf) << '\n';
    return 0;
    }
    • almost

      The expression almost(is_not_less)(x, y, t) where x and y must be floating point values, evals to true if and only if and only if x is not almost less than y. This means that the pair x, y is unordered or:

      • if t is a floating_value then \((x \ge y - t \max(|x|, |y|))\)
      • if t is a positive integral_value then \((x \ge \mbox{prev}(y, t)\);
      • if t is omitted then the tolerance t default to 3*eps(as(x)).

      Example

      #include <eve/module/core.hpp>
      #include <eve/wide.hpp>
      #include <iostream>
      int main()
      {
      wide_ft pf = {0.0f, 1.0f, -1.0f, 2.0f};
      wide_ft qf = {1.0f, -1.0f, 0.0f, 3.0f};
      std::cout << "---- simd" << '\n'
      << "<- pf = " << pf << '\n'
      << "<- qf = " << qf << '\n'
      << "-> definitely(is_not_less)(pf, qf) = " << eve::definitely(eve::is_not_less)(pf, qf) << '\n';
      return 0;
      }
      constexpr definitely_type const definitely
      Higher-order Callable Object imbuing a tolerant to small errors semantic onto other Callable Objects.
      Definition: fuzzy.hpp:104