3.280. __nv_rhypot

double @__nv_rhypot(double %x, double %y)

Calculate the reciprocal square root of the sum of squares of two arguments.

Calculate reciprocal of the length of the hypotenuse of a right triangle whose two sides have lengths x and y without undue overflow or underflow.

Note

For accuracy information, see the CUDA C++ Programming Guide, Mathematical Functions Appendix, Double-Precision Floating-Point Functions section.

Returns

Returns the length of the hypotenuse \(\sqrt{x^2+y^2}\). If the correct value would overflow, returns \(+\infty\). If the correct value would underflow, returns 0.