is_greater_equal

eve::is_greater_equal = {}

inlineconstexpr

Returns a logical true if and only if the element value of the first parameter is greater or equal to 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_greater_equal(T x,U y) noexcept;
}

Parameters

• x, y : argument.

Return value

The call eve::is_greater_equal(x,y) is semantically equivalent to x >= y:

Example

#include <eve/module/core.hpp>
#include <eve/wide.hpp>
#include <iostream>
 
using wide_ft = eve::wide<float, eve::fixed<4>>;
 
int main()
{
  wide_ft pf = {0.0f, 1.0f, -1.0f, -2.0f};
  wide_ft qf = {1.0f, -1.0f, -1.0f, -3.0f};
 
  std::cout << "---- simd" << '\n'
            << "<- pf                       = " << pf << '\n'
            << "<- qf                       = " << qf << '\n'
            << "-> is_greater_equal(pf, qf) = " << eve::is_greater_equal(pf, qf) << '\n';
 
  float xf = 1.0f;
  float yf = 2.0f;
 
  std::cout << "---- scalar" << '\n'
            << "<- xf                       = " << xf << '\n'
            << "<- yf                       = " << yf << '\n'
            << "-> is_greater_equal(xf, yf) = " << eve::is_greater_equal(xf, yf) << '\n';
  return 0;
}

Semantic Modifiers

• Masked Call

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

  Example

  #include <eve/module/core.hpp>
  #include <eve/wide.hpp>
  #include <iostream>
   
  using wide_ft = eve::wide<float, eve::fixed<4>>;
   
  int main()
  {
    wide_ft pf = {0.0f, 1.0f, -1.0f, -2.0f};
    wide_ft qf = {1.0f, -1.0f, -1.0f, -3.0f};
   
    std::cout << "---- simd" << '\n'
              << "<- pf                               = " << pf << '\n'
              << "<- qf                               = " << qf << '\n'
              << "-> is_greater_equal[pf > 0](pf, qf) = " << eve::is_greater_equal[pf > 0](pf, qf) << '\n';
    return 0;
  }

• almost

  The expression definitely(is_greater_equal)(x, y, t) where x and y must be floating point values, evals to true if and only if x is almost greater than y. This means that:

  • if t is a floating_value then \(x > y - t \max(|x|, |y|)\)
  • if t is a positive integral_value then \(x > \mbox{prev}(y, t)\);
  • 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>
   
  using wide_ft = eve::wide<float, eve::fixed<4>>;
   
  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'
              << "-> almost(is_greater_equal)(pf, qf) = " << eve::almost(eve::is_greater_equal)(pf, qf) << '\n';
    return 0;
  }