Add FMA4 feature flag. Intrinsics coming soon. Also make sse4a feature flag imply sse3. Matches gcc behavior.

llvm-svn: 147370

2 files changed, 30 insertions, 8 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index a768226b40c..aebb28a68e5 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -1199,6 +1199,7 @@ class X86TargetInfo : public TargetInfo {
   bool HasBMI;
   bool HasBMI2;
   bool HasPOPCNT;
+  bool HasFMA4;
 
   /// \brief Enumeration of all of the X86 CPUs supported by Clang.
   ///
@@ -1336,7 +1337,8 @@ public:
   X86TargetInfo(const std::string& triple)
     : TargetInfo(triple), SSELevel(NoSSE), MMX3DNowLevel(NoMMX3DNow),
       HasAES(false), HasAVX(false), HasAVX2(false), HasLZCNT(false),
-      HasBMI(false), HasBMI2(false), HasPOPCNT(false), CPU(CK_Generic) {
+      HasBMI(false), HasBMI2(false), HasPOPCNT(false), HasFMA4(false),
+      CPU(CK_Generic) {
     BigEndian = false;
     LongDoubleFormat = &llvm::APFloat::x87DoubleExtended;
   }
@@ -1521,6 +1523,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
   Features["bmi"] = false;
   Features["bmi2"] = false;
   Features["popcnt"] = false;
+  Features["fma4"] = false;
 
   // FIXME: This *really* should not be here.
 
@@ -1690,8 +1693,13 @@ bool X86TargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features,
       Features["mmx"] = Features["sse"] = Features["sse2"] = Features["sse3"] =
         Features["ssse3"] = Features["sse41"] = Features["sse42"] =
         Features["popcnt"] = Features["avx"] = Features["avx2"] = true;
+    else if (Name == "fma4")
+        Features["mmx"] = Features["sse"] = Features["sse2"] = Features["sse3"] =
+        Features["ssse3"] = Features["sse41"] = Features["sse42"] =
+        Features["popcnt"] = Features["avx"] = Features["fma4"] = true;
     else if (Name == "sse4a")
-      Features["mmx"] = Features["sse4a"] = true;
+      Features["mmx"] = Features["sse"] = Features["sse2"] = Features["sse3"] =
+        Features["sse4a"] = true;
     else if (Name == "lzcnt")
       Features["lzcnt"] = true;
     else if (Name == "bmi")
@@ -1705,13 +1713,14 @@ bool X86TargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features,
       Features["mmx"] = Features["3dnow"] = Features["3dnowa"] = false;
     else if (Name == "sse")
       Features["sse"] = Features["sse2"] = Features["sse3"] =
-        Features["ssse3"] = Features["sse41"] = Features["sse42"] = false;
+        Features["ssse3"] = Features["sse41"] = Features["sse42"] =
+        Features["sse4a"] = false;
     else if (Name == "sse2")
       Features["sse2"] = Features["sse3"] = Features["ssse3"] =
-        Features["sse41"] = Features["sse42"] = false;
+        Features["sse41"] = Features["sse42"] = Features["sse4a"] = false;
     else if (Name == "sse3")
       Features["sse3"] = Features["ssse3"] = Features["sse41"] =
-        Features["sse42"] = false;
+        Features["sse42"] = Features["sse4a"] = false;
     else if (Name == "ssse3")
       Features["ssse3"] = Features["sse41"] = Features["sse42"] = false;
     else if (Name == "sse4" || Name == "sse4.1")
@@ -1725,7 +1734,7 @@ bool X86TargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features,
     else if (Name == "aes")
       Features["aes"] = false;
     else if (Name == "avx")
-      Features["avx"] = Features["avx2"] = false;
+      Features["avx"] = Features["avx2"] = Features["fma4"] = false;
     else if (Name == "avx2")
       Features["avx2"] = false;
     else if (Name == "sse4a")
@@ -1738,6 +1747,8 @@ bool X86TargetInfo::setFeatureEnabled(llvm::StringMap<bool> &Features,
       Features["bmi2"] = false;
     else if (Name == "popcnt")
       Features["popcnt"] = false;
+    else if (Name == "fma4")
+      Features["fma4"] = false;
   }
 
   return true;
@@ -1777,10 +1788,14 @@ void X86TargetInfo::HandleTargetFeatures(std::vector<std::string> &Features) {
       continue;
     }
 
+    if (Features[i].substr(1) == "fma4") {
+      HasFMA4 = true;
+      continue;
+    }
+
     // FIXME: Not sure yet how to treat AVX in regard to SSE levels.
     // For now let it be enabled together with other SSE levels.
     if (Features[i].substr(1) == "avx2") {
-      HasAVX = true;
       HasAVX2 = true;
       continue;
     }
@@ -2011,6 +2026,9 @@ void X86TargetInfo::getTargetDefines(const LangOptions &Opts,
   if (HasPOPCNT)
     Builder.defineMacro("__POPCNT__");
 
+  if (HasFMA4)
+    Builder.defineMacro("__FMA4__");
+
   // Each case falls through to the previous one here.
   switch (SSELevel) {
   case SSE42:
diff --git a/clang/lib/Headers/x86intrin.h b/clang/lib/Headers/x86intrin.h
index 181330d0bb6..5f9bea7107a 100644
--- a/clang/lib/Headers/x86intrin.h
+++ b/clang/lib/Headers/x86intrin.h
@@ -42,6 +42,10 @@
 #include <popcntintrin.h>
 #endif
 
-// FIXME: SSE4A, 3dNOW, FMA4, XOP, LWP, ABM
+#ifdef __FMA4__
+#include <fma4intrin.h>
+#endif
+
+// FIXME: SSE4A, 3dNOW, XOP, LWP, ABM
 
 #endif /* __X86INTRIN_H */