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

[via llvm-commits]

================
@@ -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>;
+}
+
+multiclass SUMOP4<string s, string za, string t, string i, list<ImmCheck> checks> {
+  def _1x1 : SInst<"svmop4" # s # "[_1x1_]" # za # "[_{d}_{3}]",
----------------
Lukacma wrote:

```suggestion
  def _1x1 : SInst<"svmop4" # s # "[_1x1]_" # za # "[_{d}_{3}]",
```

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