[clang] [llvm] [Clang][LLVM] Implement single-single vectors MOP4{A/S} (PR #127797)

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@@ -376,6 +376,24 @@ let SMETargetGuard = "sme2" in {
 // Outer product and accumulate/subtract
 //
 
+multiclass MOP4<string name, string n, string t, string i, string wide, list<ImmCheck> checks> {
+  def NAME # "_1x1" : Inst<"svmop4" # name # "_1x1_" # n # "[_{d}_{d}]", "vidd", t, MergeNone, i # wide # "_1x1", [IsInOutZA, IsStreaming], checks>;
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Lukacma wrote:

I think _1x1 needs to be bracketed.

https://github.com/llvm/llvm-project/pull/127797