Function writelane_u64 

pub unsafe fn writelane_u64(value: u64, lane: u32, default: u64) -> u64

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

Available on target_arch=amdgpu only.

Return value for the lane at index lane in the wavefront. Return default for all other lanes.

The value to write and lane select arguments must be uniform across the currently active threads of the current wavefront. Otherwise, the result is undefined.

value is the value returned by lane. default is the value returned by all lanes other than lane.