Function readlane_u64 

pub unsafe fn readlane_u64(value: u64, lane: u32) -> u64

🔬This is a nightly-only experimental API. (stdarch_amdgpu #149988)

Available on target_arch=amdgpu only.

Get value from the lane at index lane in the wavefront.

The lane argument must be uniform across the currently active threads of the current wavefront. Otherwise, the result is undefined.