[mips] Add support for -mfpxx and -mno-fpxx.

Differential Revision: http://reviews.llvm.org/D4464

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213132 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index 1eb5e44d1b8c71e475f2b7bd139e9b1683673e72..1c3f33fbcd8fb88295f8e6b0de1c5a782aaa5d75 100644 (file)
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -1261,6 +1261,9 @@ def mips64r2 : Flag<["-"], "mips64r2">,
 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 modd_spreg : Flag<["-"], "modd-spreg">, Group<m_Group>,
   HelpText<"Enable odd single-precision floating point registers">,
   Flags<[HelpHidden]>;

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 8b8da3013e3c45860e0e32f890443b35f7949a14..b66d78a6584c85c008951ba8119491b054f784c8 100644 (file)
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1058,6 +1058,10 @@ static void getMIPSTargetFeatures(const Driver &D, const ArgList &Args,
                    "msa");
   AddTargetFeature(Args, Features, options::OPT_mfp64, options::OPT_mfp32,
                    "fp64");
+  if (Args.getLastArg(options::OPT_mfpxx)) {
+    Features.push_back(Args.MakeArgString("+fpxx"));
+    Features.push_back(Args.MakeArgString("+nooddspreg"));
+  }
   AddTargetFeature(Args, Features, options::OPT_mno_odd_spreg,
                    options::OPT_modd_spreg, "nooddspreg");
 }

diff --git a/test/Driver/mips-features.c b/test/Driver/mips-features.c
index 2abb632da94b1c83e81614c5dab67194e8ba24e6..03cc0fd7e3683d71130f99413808e962c0063d51 100644 (file)
--- a/test/Driver/mips-features.c
+++ b/test/Driver/mips-features.c
@@ -70,6 +70,18 @@
 // RUN:   | FileCheck --check-prefix=CHECK-NOMODDSPREG %s
 // CHECK-NOMODDSPREG: "-target-feature" "+nooddspreg"
 //
+// -mfpxx
+// RUN: %clang -target mips-linux-gnu -### -c %s -mfpxx 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-MFPXX %s
+// CHECK-MFPXX: "-target-feature" "+fpxx"
+// CHECK-MFPXX: "-target-feature" "+nooddspreg"
+//
+// -mfpxx -modd-spreg
+// RUN: %clang -target mips-linux-gnu -### -c %s -mfpxx -modd-spreg 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-MFPXX-ODDSPREG %s
+// CHECK-MFPXX-ODDSPREG: "-target-feature" "+fpxx"
+// CHECK-MFPXX-ODDSPREG: "-target-feature" "-nooddspreg"
+//
 // -mfp64
 // RUN: %clang -target mips-linux-gnu -### -c %s \
 // RUN:     -mfp32 -mfp64 2>&1 \