E.V.E
v2023.02.15
 
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◆ frexp

auto eve::frexp = functor<frexp_t>
inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
// Regular overload
constexpr auto frexp(floating_value auto x) noexcept; // 1
// Lanes masking
constexpr auto frexp[conditional_expr auto c](floating_value auto x) noexcept; // 2
constexpr auto frexp[logical_value auto m](floating_value auto x) noexcept; // 2
// Semantic options
constexpr auto frexp[pedantic](floating_value x) noexcept; // 3
}
Specifies that a type is a Conditional Expression.
Definition conditional.hpp:28
The concept floating_value<T> is satisfied if and only if T satisfies eve::value and the element type...
Definition value.hpp:116
The concept logical_value<T> is satisfied if and only if T satisfies eve::value and the element type ...
Definition value.hpp:132
constexpr auto frexp
elementwise_callable computing the ieee pair of mantissa and exponent of a floating value,
Definition frexp.hpp:77
EVE Main Namespace.
Definition abi.hpp:18

Parameters

Return value

  1. returns a kumi::tuple {m,e} of values of the same type asx`, which are related by \(x = m\times 2^e\), with \(|m| \in [0.5, 1.5[\). However, the cases \(x = \pm\infty\) or is a Nan or a denormal are undefined.
  2. The operation is performed conditionnaly.
  3. this option takes also properly care of the cases where \(x = \pm0, \pm\infty\) or is a Nan, where \(m=x\) and \(e=0\) and of the denormal cases.

External references

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
int main()
{
eve::wide wf0{0.0, 1.0, 2.0, 3.0, -1.0, -2.0, -3.0, -4.0};
std::cout << "<- wf0 = " << wf0 << "\n";
std::cout << "-> frexp(wf0) = " << eve::frexp(wf0) << "\n";
std::cout << "-> frexp[pedantic](wf0) = " << eve::frexp[eve::pedantic](wf0) << "\n";
}
Wrapper for SIMD registers.
Definition wide.hpp:70