E.V.E
v2023.02.15
 
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◆ lerp

auto eve::lerp = functor<lerp_t>
inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
// Regular overload
constexpr auto lerp(floating_value auto x, floating_value auto y, floating_value auto t) noexcept; // 1
// Lanes masking
constexpr auto lerp[conditional_expr auto c](floating_value auto x, floating_value auto y, floating_value auto t) noexcept; // 2
constexpr auto lerp[logical_value auto m](floating_value auto x, floating_value auto y, floating_value auto t) noexcept; // 2
// Semantic options
constexpr auto abs[pedantic](floating_value auto x, floating_value auto y, floating_value auto t) 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 lerp
Computes the linear interpolation.
Definition lerp.hpp:75
constexpr auto abs
elementwise_callable object computing the absolute value of the parameter.
Definition abs.hpp:85
EVE Main Namespace.
Definition abi.hpp:18

Parameters

Return value

  1. The value of the interpolation (or extrapolation) between x and y is returned. The call is semantically equivalent to x+t*(y-x) but uses fma opportunities.
  2. The operation is performed conditionnaly
  3. pedantic version of fma is used internally.

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};
eve::wide wf1{0.0, -4.0, 1.0, -1.0, 2.0, -2.0, 3.0, -3.0};
eve::wide wf2{0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0};
std::cout << "<- wf0 = " << wf0 << "\n";
std::cout << "<- wf1 = " << wf1 << "\n";
std::cout << "<- wf2 = " << wf2 << "\n";
std::cout << "-> lerp(wf0, wf1, wf2) = " << eve::lerp(wf0, wf1, wf2) << "\n";
std::cout << "-> lerp[ignore_last(2)](wf0, wf1, wf2) = " << eve::lerp[eve::ignore_last(2)](wf0, wf1, wf2) << "\n";
std::cout << "-> lerp[wf0 != 0](wf0, wf1, wf2) = " << eve::lerp[wf0 != 0](wf0, wf1, wf2) << "\n";
}
Conditional expression ignoring the k last lanes from a eve::simd_value.
Definition conditional.hpp:332
Wrapper for SIMD registers.
Definition wide.hpp:70