E.V.E
v2023.02.15
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◆
atanpi
eve::atanpi =
functor
<atanpi_t>
inline
constexpr
Header file
#include <eve/module/math.hpp>
Callable Signatures
namespace
eve
{
// Regular overload
constexpr
auto
atanpi
(
floating_value
auto
x)
noexcept
;
// 1
// Lanes masking
constexpr
auto
atanpi
[
conditional_expr
auto
c](
floating_value
auto
x)
noexcept
;
// 2
constexpr
auto
atanpi
[
logical_value
auto
m](
floating_value
auto
x)
noexcept
;
// 2
}
eve::conditional_expr
Specifies that a type is a Conditional Expression.
Definition:
conditional.hpp:27
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:95
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:107
eve::atanpi
constexpr auto atanpi
Callable object computing te arc tangent in multiples.
Definition:
atanpi.hpp:79
eve
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
Returns the
elementwise
value in \(\pi\) multiples of the arc tangent of the input in the range \(]-\frac12, \frac12]\). In particular:
If the element is \(\pm0\), \(\pm0\) is returned.
If the element is \(\pm\infty\), \(\pm\frac12\) is returned.
If the element is a
Nan
,
NaN
is returned.
The operation is performed conditionnaly
.
External references
C++ standard reference: atan
Wolfram MathWorld: Inverse Tangent
Wikipedia: Inverse trigonometric functions
DLMF: Inverse trigonometric functions
Example
// revision 1
#include <eve/module/math.hpp>
#include <iostream>
int
main()
{
eve::wide
wf = { 0.0f, 0.99f, -1.0f, -0.5f, -5.0f, 6.25f, 1.0f, -2.0f};
std::cout <<
"<- wf = "
<< wf <<
"\n"
;
std::cout <<
"-> atanpi(wf) = "
<<
eve::atanpi
(wf) <<
"\n"
;
std::cout <<
"-> atanpi[ignore_last(2)](wf)= "
<<
eve::atanpi
[
eve::ignore_last
(2)](wf) <<
"\n"
;
std::cout <<
"-> atanpi[wf != -2.0f](wf) = "
<<
eve::atanpi
[wf != -2.0f](wf) <<
"\n"
;
}
eve::ignore_last
Conditional expression ignoring the k last lanes from a eve::simd_value.
Definition:
conditional.hpp:304
eve::wide
Wrapper for SIMD registers.
Definition:
wide.hpp:71
eve