[llvm-branch-commits] [llvm] AMDGPU: Add a subtarget feature for fine-grained remote memory support (PR #96442)

[Yaxun Liu via llvm-branch-commits]

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@@ -788,6 +788,14 @@ def FeatureFlatAtomicFaddF32Inst
   "Has flat_atomic_add_f32 instruction"
 >;
 
+def FeatureAgentScopeFineGrainedRemoteMemoryAtomics
+  : SubtargetFeature<"agent-scope-fine-grained-remote-memory-atomics",
+  "HasAgentScopeFineGrainedRemoteMemoryAtomics",
+  "true",
+  "Agent (device) scoped atomic operations not directly supported by "
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yxsamliu wrote:

I feel the description is a little bit confusing, at least for me.

how about

"Agent (device) scoped atomic operations, excluding those directly supported by PCIe (i.e., integer atomic add, exchange, and compare-and-swap), are functional for allocations in host or peer PCIe device memory."

https://github.com/llvm/llvm-project/pull/96442