pub unsafe fn readlane_u32(value: u32, lane: u32) -> u32🔬This is a nightly-only experimental API. (
stdarch_amdgpu #149988)Available on AMD GPU only.
Expand description
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.
This intrinsic does not behave like a normal function call; it is a “convergent” operation and as such has non-standard control-flow effects which need special treatment by the language. Rust currently does not properly support convergent operations. This operation is hence provided on a best-effort basis. Using it may result in incorrect code under some circumstances.