diff --git a/clang/include/clang/Basic/BuiltinsHexagon.td b/clang/include/clang/Basic/BuiltinsHexagon.td
index cf18359e7bf60..00f84cd72a051 100644
--- a/clang/include/clang/Basic/BuiltinsHexagon.td
+++ b/clang/include/clang/Basic/BuiltinsHexagon.td
@@ -2146,3 +2146,69 @@ let Features = HVXV79.Features in {
   def V6_vsub_hf_f8 : HexagonBuiltin<"_Vector<32, int>(_Vector<16, int>, _Vector<16, int>)">;
   def V6_vsub_hf_f8_128B : HexagonBuiltin<"_Vector<64, int>(_Vector<32, int>, _Vector<32, int>)">;
 }
+
+// V81 HVX Instructions.
+let Features = HVXV81.Features in {
+  def V6_vabs_qf16_hf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vabs_qf16_hf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vabs_qf16_qf16 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vabs_qf16_qf16_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vabs_qf32_qf32 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vabs_qf32_qf32_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vabs_qf32_sf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vabs_qf32_sf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_valign4 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>, _Vector<16, int>, int)">;
+  def V6_valign4_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>, _Vector<32, int>, int)">;
+  def V6_vconv_bf_qf32 : HexagonBuiltin<"_Vector<16, int>(_Vector<32, int>)">;
+  def V6_vconv_bf_qf32_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<64, int>)">;
+  def V6_vconv_f8_qf16 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vconv_f8_qf16_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vconv_h_hf_rnd : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vconv_h_hf_rnd_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vconv_qf16_f8 : HexagonBuiltin<"_Vector<32, int>(_Vector<16, int>)">;
+  def V6_vconv_qf16_f8_128B : HexagonBuiltin<"_Vector<64, int>(_Vector<32, int>)">;
+  def V6_vconv_qf16_hf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vconv_qf16_hf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vconv_qf16_qf16 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vconv_qf16_qf16_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vconv_qf32_qf32 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vconv_qf32_qf32_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vconv_qf32_sf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vconv_qf32_sf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_veqhf : HexagonBuiltin<"_Vector<64, bool>(_Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqhf_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<32, int>, _Vector<32, int>)">;
+  def V6_veqhf_and : HexagonBuiltin<"_Vector<64, bool>(_Vector<64, bool>, _Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqhf_and_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<128, bool>, _Vector<32, int>, _Vector<32, int>)">;
+  def V6_veqhf_or : HexagonBuiltin<"_Vector<64, bool>(_Vector<64, bool>, _Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqhf_or_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<128, bool>, _Vector<32, int>, _Vector<32, int>)">;
+  def V6_veqhf_xor : HexagonBuiltin<"_Vector<64, bool>(_Vector<64, bool>, _Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqhf_xor_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<128, bool>, _Vector<32, int>, _Vector<32, int>)">;
+  def V6_veqsf : HexagonBuiltin<"_Vector<64, bool>(_Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqsf_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<32, int>, _Vector<32, int>)">;
+  def V6_veqsf_and : HexagonBuiltin<"_Vector<64, bool>(_Vector<64, bool>, _Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqsf_and_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<128, bool>, _Vector<32, int>, _Vector<32, int>)">;
+  def V6_veqsf_or : HexagonBuiltin<"_Vector<64, bool>(_Vector<64, bool>, _Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqsf_or_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<128, bool>, _Vector<32, int>, _Vector<32, int>)">;
+  def V6_veqsf_xor : HexagonBuiltin<"_Vector<64, bool>(_Vector<64, bool>, _Vector<16, int>, _Vector<16, int>)">;
+  def V6_veqsf_xor_128B : HexagonBuiltin<"_Vector<128, bool>(_Vector<128, bool>, _Vector<32, int>, _Vector<32, int>)">;
+  def V6_vilog2_hf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vilog2_hf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vilog2_qf16 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vilog2_qf16_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vilog2_qf32 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vilog2_qf32_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vilog2_sf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vilog2_sf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vneg_qf16_hf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vneg_qf16_hf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vneg_qf16_qf16 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vneg_qf16_qf16_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vneg_qf32_qf32 : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vneg_qf32_qf32_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vneg_qf32_sf : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>)">;
+  def V6_vneg_qf32_sf_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>)">;
+  def V6_vsub_hf_mix : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>, _Vector<16, int>)">;
+  def V6_vsub_hf_mix_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>, _Vector<32, int>)">;
+  def V6_vsub_sf_mix : HexagonBuiltin<"_Vector<16, int>(_Vector<16, int>, _Vector<16, int>)">;
+  def V6_vsub_sf_mix_128B : HexagonBuiltin<"_Vector<32, int>(_Vector<32, int>, _Vector<32, int>)">;
+}