Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -1248,6 +1248,13 @@
 def mips64r6 : Flag<["-"], "mips64r6">,
   Alias<march_EQ>, AliasArgs<["mips64r6"]>,
   HelpText<"Equivalent to -march=mips64r6">, Flags<[HelpHidden]>;
+def mfpxx : Flag<["-"], "mfpxx">, Group<m_Group>,
+  HelpText<"Avoid FPU mode dependent operations when used with the O32 ABI">,
+  Flags<[HelpHidden]>;
+def mno_fpxx : Flag<["-"], "mno-fpxx">, Group<m_Group>,
+  HelpText<"Do not avoid FPU mode dependent operations when used with the O32 "
+           "ABI">,
+  Flags<[HelpHidden]>;
 def modd_spreg : Flag<["-"], "modd-spreg">, Group<m_Group>,
   HelpText<"Enable odd single-precision floating point registers">,
   Flags<[HelpHidden]>;
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -1058,6 +1058,8 @@
                    "msa");
   AddTargetFeature(Args, Features, options::OPT_mfp64, options::OPT_mfp32,
                    "fp64");
+  AddTargetFeature(Args, Features, options::OPT_mfpxx, options::OPT_mno_fpxx,
+                   "fpxx");
   AddTargetFeature(Args, Features, options::OPT_mno_odd_spreg,
                    options::OPT_modd_spreg, "nooddspreg");
 }
Index: test/Driver/mips-features.c
===================================================================
--- test/Driver/mips-features.c
+++ test/Driver/mips-features.c
@@ -70,6 +70,16 @@
 // RUN:   | FileCheck --check-prefix=CHECK-NOMODDSPREG %s
 // CHECK-NOMODDSPREG: "-target-feature" "+nooddspreg"
 //
+// -mfpxx
+// RUN: %clang -target mips-linux-gnu -### -c %s -mno-fpxx -mfpxx 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-MFPXX %s
+// CHECK-MFPXX: "-target-feature" "+fpxx"
+//
+// -mno-fpxx
+// RUN: %clang -target mips-linux-gnu -### -c %s -mfpxx -mno-fpxx 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-NOMFPXX %s
+// CHECK-NOMFPXX: "-target-feature" "-fpxx"
+//
 // -mfp64
 // RUN: %clang -target mips-linux-gnu -### -c %s \
 // RUN:     -mfp32 -mfp64 2>&1 \