Index: clang/include/clang/Driver/Options.td
===================================================================
--- clang/include/clang/Driver/Options.td
+++ clang/include/clang/Driver/Options.td
@@ -2651,6 +2651,10 @@
 def mno_dsp : Flag<["-"], "mno-dsp">, Group<m_mips_Features_Group>;
 def mdspr2 : Flag<["-"], "mdspr2">, Group<m_mips_Features_Group>;
 def mno_dspr2 : Flag<["-"], "mno-dspr2">, Group<m_mips_Features_Group>;
+def mmips3d : Flag<["-"], "mmips3d">, Group<m_mips_Features_Group>,
+  HelpText<"Enable MIPS3D ASE (MIPS only)">;
+def mno_mips3d : Flag<["-"], "mno-mips3d">, Group<m_mips_Features_Group>,
+  HelpText<"Disable MIPS3D ASE (MIPS only)">;
 def msingle_float : Flag<["-"], "msingle-float">, Group<m_mips_Features_Group>;
 def mdouble_float : Flag<["-"], "mdouble-float">, Group<m_mips_Features_Group>;
 def mmadd4 : Flag<["-"], "mmadd4">, Group<m_mips_Features_Group>,
Index: clang/lib/Driver/ToolChains/Arch/Mips.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Arch/Mips.cpp
+++ clang/lib/Driver/ToolChains/Arch/Mips.cpp
@@ -343,6 +343,8 @@
                    "dspr2");
   AddTargetFeature(Args, Features, options::OPT_mmsa, options::OPT_mno_msa,
                    "msa");
+  AddTargetFeature(Args, Features, options::OPT_mmips3d,
+                   options::OPT_mno_mips3d, "mips3d");
 
   // Add the last -mfp32/-mfpxx/-mfp64, if none are given and the ABI is O32
   // pass -mfpxx, or if none are given and fp64a is default, pass fp64 and