E.V.E
v2023.02.15
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log_abs_gamma
auto eve::log_abs_gamma =
functor
<log_abs_gamma_t>
inline
constexpr
Header file
#include <eve/module/special.hpp>
Callable Signatures
namespace
eve
{
// Regular overload
constexpr
auto
log_abs_gamma
(
floating_value
auto
x)
noexcept
;
// 1
// Lanes masking
constexpr
auto
log_abs_gamma
[
conditional_expr
auto
c](
floating_value
auto
x)
noexcept
;
// 2
constexpr
auto
log_abs_gamma
[
logical_value
auto
m](
floating_value
auto
x)
noexcept
;
// 2
}
eve::conditional_expr
Specifies that a type is a Conditional Expression.
Definition
conditional.hpp:28
eve::floating_value
The concept floating_value<T> is satisfied if and only if T satisfies eve::value and the element type...
Definition
value.hpp:116
eve::logical_value
The concept logical_value<T> is satisfied if and only if T satisfies eve::value and the element type ...
Definition
value.hpp:132
eve::log_abs_gamma
constexpr auto log_abs_gamma
elementwise_callable object computing the natural logarithm of the absolute value of the function.
Definition
log_abs_gamma.hpp:69
eve
EVE Main Namespace.
Definition
abi.hpp:18
Parameters
x
:
floating argument
.
c
:
Conditional expression
masking the operation.
m
:
Logical value
masking the operation.
Return value
the value of the logarithm of the absolute value of the \(\Gamma\) function is returned.
The operation is performed conditionnaly
.
External references
[Wolfram MathWorld: Log Gamma Function](
https://mathworld.wolfram.com/LogGammaFunction.html
Example
// revision 1
#include <eve/module/special.hpp>
#include <iostream>
int
main()
{
eve::wide
wf = {0.5f, -1.5f, -1.0f, 1.0f, 5.0f,
eve::inf
(
eve::as<float>
()),
eve::minf
(
eve::as<float>
()),
eve::nan
(
eve::as<float>
())};
std::cout <<
"<- wf = "
<< wf <<
"\n"
;
std::cout <<
"-> log_abs_gamma(wf) = "
<<
eve::log_abs_gamma
(wf) <<
"\n"
;
std::cout <<
"-> log_abs_gamma[ignore_last(2)](wf) = "
<<
eve::log_abs_gamma
[
eve::ignore_last
(2)](wf) <<
"\n"
;
std::cout <<
"-> log_abs_gamma[wf != 2.0f](wf) = "
<<
eve::log_abs_gamma
[wf != 2.0f](wf) <<
"\n"
;
}
eve::nan
constexpr auto nan
Computes the IEEE quiet NaN constant.
Definition
nan.hpp:67
eve::inf
constexpr auto inf
Computes the infinity ieee value.
Definition
inf.hpp:66
eve::minf
constexpr auto minf
Computes the -infinity ieee value.
Definition
minf.hpp:66
eve::as
Lightweight type-wrapper.
Definition
as.hpp:29
eve::ignore_last
Conditional expression ignoring the k last lanes from a eve::simd_value.
Definition
conditional.hpp:332
eve::wide
Wrapper for SIMD registers.
Definition
wide.hpp:70
eve