message: Expose CUDA rsqrtf()
diff: @@ -513,6 +513,14 @@ inline T rsqrt(T const& x)
  return T(1.0) / sqrt(x);
  }
  +#ifdef __CUDA_ARCH__
  +MATH_GPU_FUNC
  +inline float rsqrt(float x)
  +{
  + return rsqrtf(x);
  +}
  +#endif
  +
  template <typename T>
  MATH_FUNC
  inline T cot(T const& x)
  