[Clang][XTHeadVector] implement 12.10 vdivu/vdiv/vrem/vremu (llvm#81)

* [Clang][XTHeadVector] implement 12.10 `vdivu/vdiv/vrem/vremu`

* [Clang][XTHeadVector] test 12.10 `vdivu/vdiv/vrem/vremu`

Author: imkiva

clang/include/clang/Basic/riscv_vector_xtheadv.td

@@ -1079,6 +1079,13 @@ let MaskedPolicyScheme = HasPassthruOperand,
 }
 
 // 12.10. Vector Integer Divide Operations
+let MaskedPolicyScheme = HasPassthruOperand,
+    UnMaskedPolicyScheme = HasPassthruOperand in {
+  defm th_vdivu : RVVUnsignedBinBuiltinSet;
+  defm th_vdiv : RVVSignedBinBuiltinSet;
+  defm th_vremu : RVVUnsignedBinBuiltinSet;
+  defm th_vrem : RVVSignedBinBuiltinSet;
+}
 
 // 12.11. Vector Widening Integer Multiply Operations