[Mlir-commits] [mlir] [mlir][gpu] Add GPU subgroup MMA extract and insert operations (PR #139048)
Hsiangkai Wang
llvmlistbot at llvm.org
Fri May 23 01:52:53 PDT 2025
================
@@ -1919,6 +1919,81 @@ def GPU_SubgroupMmaConstantMatrixOp : GPU_Op<"subgroup_mma_constant_matrix",
}];
}
+def GPU_SubgroupMmaExtractOp : GPU_Op<"subgroup_mma_extract",
+ [Pure,
+ TypesMatchWith<"value type matches element type of mma_matrix",
+ "matrix", "res",
+ "::llvm::cast<gpu::MMAMatrixType>($_self).getElementType()">]>{
+
+ let summary = "Extract a value from GPU warp by invocation and indices";
+
+ let description = [{
+ The `gpu.subgroup_mma_extract` operation extracts a value from `!gpu.mma_matrix`
+ by the invocation in a subgroup.
+
+ This operation takes `!gpu.mma_matrix` as its first operand. It is the source
+ matrix across a subgroup. The op returns a scalar value stored in the invocation
+ in the subgroup. The values of !gpu.mma_matrix are stored across multiple
+ threads in the subgroup. If there are multiple values packed in a thread, use
+ `indices` to specify the element in the local thread to extract.
----------------
Hsiangkai wrote:
Description updated and rename the operations to reflect its meaning.
https://github.com/llvm/llvm-project/pull/139048
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