[Mlir-commits] [mlir] [MLIR][XeGPU] Remove the transpose attribte from Gather/Scatter ops and Cleanup the documents (PR #145389)
Chao Chen
llvmlistbot at llvm.org
Tue Jun 24 11:20:23 PDT 2025
================
@@ -609,19 +572,13 @@ def XeGPU_LoadGatherOp : XeGPU_Op<"load", [
let description = [{ It (aka. load) load data per each work-item. The output
describes the data being loaded at the subgroup level, so its size is
consistent with the number of work-items in a subgroup. When the chunk size
- is larger than 2, the output vector is a 2D vector, with dim-1 correspoding
- to work-items, and dim-0 corresponding to the chunk size loaded by each work-item.
- Specially, there is a transpose effect on the result (as compared to the TensorDesc)
- due to the hardware implementation. Therefore, a transpose attribute is introduced
- on purpose, making sure users are aware of this implicit transformation.
-
+ is larger than 2, the output vector is a 2D vector, with dim-0 correspoding
+ to work-items, and dim-1 corresponding to the chunk size loaded by each work-item.
----------------
chencha3 wrote:
There is no transpose. The semantic is each row corresponding to a lane. In the SIMD lowering pipeline, the transpose will be added when we lower the `load_gather` to the corresponding intrinsic. For SIMT lowering, there is no transpose at all.
https://github.com/llvm/llvm-project/pull/145389
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