heaviside.hpp

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#pragma once
 
#include <sycl/sycl.hpp>
 
// dpctl tensor headers
#include "utils/math_utils.hpp"
#include "utils/type_utils.hpp"
 
namespace dpnp::kernels::heaviside
{
namespace mu_ns = dpctl::tensor::math_utils;
namespace tu_ns = dpctl::tensor::type_utils;
 
template <typename argT1, typename argT2, typename resT>
struct HeavisideFunctor
{
    using supports_sg_loadstore = std::negation<
        std::disjunction<tu_ns::is_complex<argT1>, tu_ns::is_complex<argT2>>>;
    using supports_vec = typename std::false_type;
 
    resT operator()(const argT1 &in1, const argT2 &in2) const
    {
        if (std::isnan(in1)) {
            return in1;
        }
        else if (in1 == 0) {
            return in2;
        }
        return resT(in1 > 0);
    }
};
} // namespace dpnp::kernels::heaviside