================
@@ -793,3 +800,16 @@ using the scale factor ``scale``, then converts the values 
to a packed
 integers.
 }];
 }
+
+//===----------------------------------------------------------------------===//
+// Prefetch Builtins
+//===----------------------------------------------------------------------===//
+
+def DocPrefetchInst_GFX12 : Documentation {
+  let Category = DocCatAMDGPUPrefetch;
+  let Content = [{
+Prefetch instructions into I-Cache from the address given by ``ptr`` pointing
+to instruction memory, with the length specified by ``len``, which should be
+0-31 (1-32 chunks, units of 128 bytes).
----------------
ro-i wrote:

"chunks / units of 128 bytes", aka cachelines, no?

https://github.com/llvm/llvm-project/pull/211642
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