math/opencl_2prim_2sign_8hpp_source.html

#ifndef STAN_MATH_OPENCL_PRIM_SIGN_HPP

#define STAN_MATH_OPENCL_PRIM_SIGN_HPP

#ifdef STAN_OPENCL


#include <stan/math/opencl/kernel_generator.hpp>


namespace stan {

namespace math {


template <typename T,

          require_all_kernel_expressions_and_none_scalar_t<T>* = nullptr>

auto sign(const T& x) {

  return select(x == 0, 0, select(x < 0, -1, 1));

}


}  // namespace math

}  // namespace stan

#endif

#endif

stan::math::select
select_< as_operation_cl_t< T_condition >, as_operation_cl_t< T_then >, as_operation_cl_t< T_else > > select(T_condition &&condition, T_then &&then, T_else &&els)
Selection operation on kernel generator expressions.
Definition select.hpp:148

kernel_generator.hpp

stan::math::sign
auto sign(const T &x)
Returns signs of the arguments.
Definition sign.hpp:18

stan
The lgamma implementation in stan-math is based on either the reentrant safe lgamma_r implementation ...
Definition unit_vector_constrain.hpp:15