[Clang][XTHeadVector] implement 12.14 vmerge (ruyisdk#88)

* [Clang][XTHeadVector] implement 12.14 `vmerge` * [Clang][XTHeadVector] test 12.14 `vmerge`
imkiva · Apr 1, 2024 · 834f54d · 834f54d
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diff --git a/clang/include/clang/Basic/riscv_vector_xtheadv.td b/clang/include/clang/Basic/riscv_vector_xtheadv.td
@@ -1144,6 +1144,23 @@ let MaskedPolicyScheme = NonePolicy,
 }
 
 // 12.14. Vector Integer Merge Operations
+let HasMasked = false,
+    UnMaskedPolicyScheme = HasPassthruOperand,
+    MaskedPolicyScheme = NonePolicy,
+    ManualCodegen = [{
+    {
+      // Builtin: (mask, op1, op2, vl), Intrinsic: (passthru, op1, op2, mask, vl)
+      if (PolicyAttrs & RVV_VTA)
+        Ops.insert(Ops.begin(), llvm::PoisonValue::get(ResultType)); // passthru
+      IntrinsicTypes = {ResultType, Ops[2]->getType(), Ops.back()->getType()};
+    }
+    }] in {
+  defm th_vmerge : RVVOutOp1BuiltinSet<"th_vmerge", "csil",
+                                       [["vvm", "v", "vvvm"],
+                                        ["vxm", "v", "vvem"],
+                                        ["vvm", "Uv", "UvUvUvm"],
+                                        ["vxm", "Uv", "UvUvUem"]]>;
+}
 
 // 12.15. Vector Integer Move Operations