## writelane_u64

# Function writelane_u64

Source

    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.
Expand description

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`.