[clang] [llvm] [AArch64] Add intrinsics for multi-vector to ZA array vector accumulators (PR #88266)

[via cfe-commits]

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@@ -298,6 +298,17 @@ multiclass ZAAddSub<string n_suffix> {
     def NAME # _ZA64_VG1X2_F64 : Inst<"sv" # n_suffix # "_za64[_{d}]_vg1x2", "vm2", "d", MergeNone, "aarch64_sme_" # n_suffix # "_za64_vg1x2", [IsStreaming, IsInOutZA], []>;
     def NAME # _ZA64_VG1X4_F64 : Inst<"sv" # n_suffix # "_za64[_{d}]_vg1x4", "vm4", "d", MergeNone, "aarch64_sme_" # n_suffix # "_za64_vg1x4", [IsStreaming, IsInOutZA], []>;
   }
+
+  let TargetGuard = "sme2p1,sme-f16f16" in {
+    def NAME # _ZA16_VG1X2_F16 : Inst<"sv" # n_suffix # "_za16[_{d}]_vg1x2", "vm2", "h", MergeNone, "aarch64_sme_" # n_suffix # "_za16_vg1x2", [IsStreaming, IsInOutZA], []>;
+    def NAME # _ZA16_VG1X4_F16 : Inst<"sv" # n_suffix # "_za16[_{d}]_vg1x4", "vm4", "h", MergeNone, "aarch64_sme_" # n_suffix # "_za16_vg1x4", [IsStreaming, IsInOutZA], []>;
+  }
+
+  let TargetGuard = "sme2p1,b16b16" in {
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CarolineConcatto wrote:

According to the ACLE these builtins should be under sme2. Maybe we need some work in the backend.  The smef16f16 prototypes in clang are under  target feature =sme2p1, smef16f16 in assembly/disassembly.

https://github.com/llvm/llvm-project/pull/88266