Add support for -mcx16, and predefine __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 when

it is enabled. Also enable it on the same architectures that GCC does.

llvm-svn: 192045

1 files changed, 25 insertions, 2 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 9c26521b723..09e7dad0639 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -1596,6 +1596,7 @@ class X86TargetInfo : public TargetInfo {
   bool HasF16C;
   bool HasAVX512CD, HasAVX512ER, HasAVX512PF;
   bool HasSHA;
+  bool HasCX16;
 
   /// \brief Enumeration of all of the X86 CPUs supported by Clang.
   ///
@@ -1756,7 +1757,8 @@ public:
         HasRDRND(false), HasBMI(false), HasBMI2(false), HasPOPCNT(false),
         HasRTM(false), HasPRFCHW(false), HasRDSEED(false), HasTBM(false),
         HasFMA(false), HasF16C(false), HasAVX512CD(false), HasAVX512ER(false),
-        HasAVX512PF(false), HasSHA(false), CPU(CK_Generic), FPMath(FP_Default) {
+        HasAVX512PF(false), HasSHA(false), HasCX16(false), CPU(CK_Generic),
+        FPMath(FP_Default) {
     BigEndian = false;
     LongDoubleFormat = &llvm::APFloat::x87DoubleExtended;
   }
@@ -2006,27 +2008,34 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
   case CK_Prescott:
   case CK_Nocona:
     setFeatureEnabledImpl(Features, "sse3", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_Core2:
     setFeatureEnabledImpl(Features, "ssse3", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_Penryn:
     setFeatureEnabledImpl(Features, "sse4.1", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_Atom:
     setFeatureEnabledImpl(Features, "ssse3", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_Silvermont:
     setFeatureEnabledImpl(Features, "sse4.2", true);
     setFeatureEnabledImpl(Features, "aes", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     setFeatureEnabledImpl(Features, "pclmul", true);
     break;
   case CK_Corei7:
     setFeatureEnabledImpl(Features, "sse4.2", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_Corei7AVX:
     setFeatureEnabledImpl(Features, "avx", true);
     setFeatureEnabledImpl(Features, "aes", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     setFeatureEnabledImpl(Features, "pclmul", true);
     break;
   case CK_CoreAVXi:
@@ -2047,6 +2056,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
     setFeatureEnabledImpl(Features, "bmi2", true);
     setFeatureEnabledImpl(Features, "rtm", true);
     setFeatureEnabledImpl(Features, "fma", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_KNL:
     setFeatureEnabledImpl(Features, "avx512f", true);
@@ -2107,6 +2117,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
   case CK_BTVER1:
     setFeatureEnabledImpl(Features, "ssse3", true);
     setFeatureEnabledImpl(Features, "sse4a", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     setFeatureEnabledImpl(Features, "lzcnt", true);
     setFeatureEnabledImpl(Features, "popcnt", true);
     break;
@@ -2118,12 +2129,14 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
     setFeatureEnabledImpl(Features, "pclmul", true);
     setFeatureEnabledImpl(Features, "bmi", true);
     setFeatureEnabledImpl(Features, "f16c", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_BDVER1:
     setFeatureEnabledImpl(Features, "xop", true);
     setFeatureEnabledImpl(Features, "lzcnt", true);
     setFeatureEnabledImpl(Features, "aes", true);
     setFeatureEnabledImpl(Features, "pclmul", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_BDVER2:
     setFeatureEnabledImpl(Features, "xop", true);
@@ -2134,6 +2147,7 @@ void X86TargetInfo::getDefaultFeatures(llvm::StringMap<bool> &Features) const {
     setFeatureEnabledImpl(Features, "fma", true);
     setFeatureEnabledImpl(Features, "f16c", true);
     setFeatureEnabledImpl(Features, "tbm", true);
+    setFeatureEnabledImpl(Features, "cx16", true);
     break;
   case CK_C3_2:
     setFeatureEnabledImpl(Features, "sse", true);
@@ -2409,6 +2423,11 @@ bool X86TargetInfo::HandleTargetFeatures(std::vector<std::string> &Features,
       continue;
     }
 
+    if (Feature == "cx16") {
+      HasCX16 = true;
+      continue;
+    }
+
     assert(Features[i][0] == '+' && "Invalid target feature!");
     X86SSEEnum Level = llvm::StringSwitch<X86SSEEnum>(Feature)
       .Case("avx512f", AVX512F)
@@ -2684,6 +2703,9 @@ void X86TargetInfo::getTargetDefines(const LangOptions &Opts,
   if (HasSHA)
     Builder.defineMacro("__SHA__");
 
+  if (HasCX16)
+    Builder.defineMacro("__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16");
+
   // Each case falls through to the previous one here.
   switch (SSELevel) {
   case AVX512F:
@@ -2762,6 +2784,8 @@ bool X86TargetInfo::hasFeature(StringRef Feature) const {
       .Case("avx512pf", HasAVX512PF)
       .Case("bmi", HasBMI)
       .Case("bmi2", HasBMI2)
+      .Case("cx16", HasCX16)
+      .Case("f16c", HasF16C)
       .Case("fma", HasFMA)
       .Case("fma4", XOPLevel >= FMA4)
       .Case("tbm", HasTBM)
@@ -2787,7 +2811,6 @@ bool X86TargetInfo::hasFeature(StringRef Feature) const {
       .Case("x86_32", getTriple().getArch() == llvm::Triple::x86)
       .Case("x86_64", getTriple().getArch() == llvm::Triple::x86_64)
       .Case("xop", XOPLevel >= XOP)
-      .Case("f16c", HasF16C)
       .Default(false);
 }