diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index cf2edb2..45f02dd 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -1920,13 +1920,39 @@ namespace {
 
 namespace {
 class MipsTargetInfo : public TargetInfo {
+  std::string ABI, CPU;
   static const TargetInfo::GCCRegAlias GCCRegAliases[];
   static const char * const GCCRegNames[];
 public:
-  MipsTargetInfo(const std::string& triple) : TargetInfo(triple) {
+  MipsTargetInfo(const std::string& triple) : TargetInfo(triple), ABI("o32") {
     DescriptionString = "E-p:32:32:32-i1:8:8-i8:8:32-i16:16:32-i32:32:32-"
                         "i64:32:64-f32:32:32-f64:64:64-v64:64:64-n32";
   }
+  virtual const char *getABI() const { return ABI.c_str(); }
+  virtual bool setABI(const std::string &Name) {
+
+    if ((Name == "o32") || (Name == "eabi")) {
+      ABI = Name;
+      return true;
+    } else
+      return false;
+  }
+  virtual bool setCPU(const std::string &Name) {
+    CPU = Name;
+    return true;
+  }
+  void getDefaultFeatures(const std::string &CPU,
+                          llvm::StringMap<bool> &Features) const {
+    Features[ABI] = true;
+    Features[CPU] = true;
+  }
+  virtual void getArchDefines(const LangOptions &Opts,
+                                MacroBuilder &Builder) const {
+    if (ABI == "o32")
+      Builder.defineMacro("__mips_o32");
+    else if (ABI == "eabi")
+      Builder.defineMacro("__mips_eabi");
+  }
   virtual void getTargetDefines(const LangOptions &Opts,
                                 MacroBuilder &Builder) const {
     DefineStd(Builder, "mips", Opts);
@@ -1934,6 +1960,7 @@ public:
     DefineStd(Builder, "MIPSEB", Opts);
     Builder.defineMacro("_MIPSEB");
     Builder.defineMacro("__REGISTER_PREFIX__", "");
+    getArchDefines(Opts, Builder);
   }
   virtual void getTargetBuiltins(const Builtin::Info *&Records,
                                  unsigned &NumRecords) const {
@@ -2045,6 +2072,7 @@ void MipselTargetInfo::getTargetDefines(const LangOptions &Opts,
   DefineStd(Builder, "MIPSEL", Opts);
   Builder.defineMacro("_MIPSEL");
   Builder.defineMacro("__REGISTER_PREFIX__", "");
+  getArchDefines(Opts, Builder);
 }
 } // end anonymous namespace.
 
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index df8c118..bf40d1f 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -480,6 +480,65 @@ void Clang::AddARMTargetArgs(const ArgList &Args,
   }
 }
 
+void Clang::AddMIPSTargetArgs(const ArgList &Args,
+                             ArgStringList &CmdArgs) const {
+  const Driver &D = getToolChain().getDriver();
+
+  // Select the ABI to use.
+  const char *ABIName = 0;
+  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
+    ABIName = A->getValue(Args);
+  } else {
+    ABIName = "o32";
+  }
+
+  CmdArgs.push_back("-target-abi");
+  CmdArgs.push_back(ABIName);
+
+  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
+    llvm::StringRef MArch = A->getValue(Args);
+    CmdArgs.push_back("-target-cpu");
+
+    if ((MArch == "r2000") || (MArch == "r3000"))
+      CmdArgs.push_back("mips1");
+    else if (MArch == "r6000")
+      CmdArgs.push_back("mips2");
+    else
+      CmdArgs.push_back(MArch.str().c_str());
+  }
+
+  // Select the float ABI as determined by -msoft-float, -mhard-float, and
+  llvm::StringRef FloatABI;
+  if (Arg *A = Args.getLastArg(options::OPT_msoft_float,
+                               options::OPT_mhard_float)) {
+    if (A->getOption().matches(options::OPT_msoft_float))
+      FloatABI = "soft";
+    else if (A->getOption().matches(options::OPT_mhard_float))
+      FloatABI = "hard";
+  }
+
+  // If unspecified, choose the default based on the platform.
+  if (FloatABI.empty()) {
+    switch (getToolChain().getTriple().getOS()) {
+    default:
+      // Assume "soft", but warn the user we are guessing.
+      FloatABI = "soft";
+      D.Diag(clang::diag::warn_drv_assuming_mfloat_abi_is) << "soft";
+      break;
+    }
+  }
+
+  if (FloatABI == "soft") {
+    // Floating point operations and argument passing are soft.
+    //
+    // FIXME: This changes CPP defines, we need -target-soft-float.
+    CmdArgs.push_back("-msoft-float");
+  } else {
+    assert(FloatABI == "hard" && "Invalid float abi!");
+    CmdArgs.push_back("-mhard-float");
+  }
+}
+
 void Clang::AddX86TargetArgs(const ArgList &Args,
                              ArgStringList &CmdArgs) const {
   if (!Args.hasFlag(options::OPT_mred_zone,
@@ -824,6 +883,11 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     AddARMTargetArgs(Args, CmdArgs);
     break;
 
+  case llvm::Triple::mips:
+  case llvm::Triple::mipsel:
+    AddMIPSTargetArgs(Args, CmdArgs);
+    break;
+
   case llvm::Triple::x86:
   case llvm::Triple::x86_64:
     AddX86TargetArgs(Args, CmdArgs);
@@ -2513,6 +2577,13 @@ void freebsd::Assemble::ConstructJob(Compilation &C, const JobAction &JA,
   if (getToolChain().getArchName() == "i386")
     CmdArgs.push_back("--32");
 
+  
+  // Set byte order explicitly
+  if (getToolChain().getArchName() == "mips")
+    CmdArgs.push_back("-EB");
+  else if (getToolChain().getArchName() == "mipsel")
+    CmdArgs.push_back("-EL");
+
   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA,
                        options::OPT_Xassembler);
 
diff --git a/lib/Driver/Tools.h b/lib/Driver/Tools.h
index db59641..7a8f1b7 100644
--- a/lib/Driver/Tools.h
+++ b/lib/Driver/Tools.h
@@ -34,6 +34,7 @@ namespace tools {
                                  const InputInfoList &Inputs) const;
 
     void AddARMTargetArgs(const ArgList &Args, ArgStringList &CmdArgs) const;
+    void AddMIPSTargetArgs(const ArgList &Args, ArgStringList &CmdArgs) const;
     void AddX86TargetArgs(const ArgList &Args, ArgStringList &CmdArgs) const;
 
   public: