E.V.E
v2023.02.15
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erfc_inv
auto eve::erfc_inv =
functor
<erfc_inv_t>
inline
constexpr
Header file
#include <eve/module/special.hpp>
Callable Signatures
namespace
eve
{
// Regular overload
constexpr
auto
erfc_inv
(
floating_value
auto
x)
noexcept
;
// 1
// Lanes masking
constexpr
auto
erfc_inv
[
conditional_expr
auto
c](
floating_value
auto
x)
noexcept
;
// 2
constexpr
auto
erfc_inv
[
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::erfc_inv
constexpr auto erfc_inv
Computes the inverse of the complementary error function.
Definition
erfc_inv.hpp:78
eve
EVE Main Namespace.
Definition
abi.hpp:18
Parameters
x
:
real floating argument
. Must be in interval \([0, 2]\) else nan is returned.
c
:
Conditional expression
masking the operation.
m
:
Logical value
masking the operation.
Return value
The value of the inverse complementary error function is returned. In particular:
If the argument is \(\pm0\), \(1\) is returned.
If the argument is \(2\), \(-\infty\) is returned.
If the argument is \(0\), \(\infty\) is returned.
If the argument is
NaN
,
NaN
is returned.
External references
C++ standard reference: erf
Wolfram MathWorld: Erf
DLMF: Error Functions
Wikipedia: Error Function
Example
// revision 1
#include <eve/module/special.hpp>
#include <iostream>
int
main()
{
eve::wide<float>
wf([](
auto
i,
auto
c)->
float
{
return
2*(i-c/2);});
std::cout <<
"<- wf = "
<< wf <<
"\n"
;
std::cout <<
"-> erfc_inv(wf) = "
<<
eve::erfc_inv
(wf) <<
"\n"
;
std::cout <<
"-> erfc_inv[ignore_last(2)](wf)= "
<<
eve::erfc_inv
[
eve::ignore_last
(2)](wf) <<
"\n"
;
std::cout <<
"-> erfc_inv[wf != -2.0f](wf) = "
<<
eve::erfc_inv
[wf != -2.0f](wf) <<
"\n"
;
}
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