Function sinpif 

pub unsafe extern "C" fn sinpif(x: f32) -> f32

Calculate the sine of (measured in radians), where is the input argumentx. x

Nvidia docs

Returns

• __nv_sinpif( ) returns .
• __nv_sinpif( ) returns NaN. For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 6.