Phi_approx.hpp

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#ifndef STAN_MATH_OPENCL_KERNELS_DEVICE_FUNCTIONS_PHI_APPROX_HPP
#define STAN_MATH_OPENCL_KERNELS_DEVICE_FUNCTIONS_PHI_APPROX_HPP
#ifdef STAN_OPENCL
 
#include <stan/math/opencl/stringify.hpp>
#include <string>
 
namespace stan {
namespace math {
namespace opencl_kernels {
// \cond
static constexpr const char* phi_approx_device_function
    = "\n"
      "#ifndef STAN_MATH_OPENCL_KERNELS_DEVICE_FUNCTIONS_PHI_APPROX\n"
      "#define "
      "STAN_MATH_OPENCL_KERNELS_DEVICE_FUNCTIONS_PHI_APPROX\n" STRINGIFY(
          // \endcond
          inline double Phi_approx(double x) {
            return inv_logit(0.07056 * pow(x, 3.0) + 1.5976 * x);
          }
          // \cond
          ) "\n#endif\n";  // NOLINT
// \endcond
}  // namespace opencl_kernels
}  // namespace math
}  // namespace stan
 
#endif
#endif