[PATCH] D34686: [AArch64] Add hasFP16VectorArithmetic helper function. NFCI

[Sjoerd Meijer via Phabricator via cfe-commits]

SjoerdMeijer created this revision.
Herald added subscribers: kristof.beyls, aemerson.

This is a clean-up for different ARMV8-A architecture kinds. Helper function hasFP16VectorArithmetic makes things a bit more “scalable” if we want to add ARMv8.3 at some point.


https://reviews.llvm.org/D34686

Files:
  lib/Basic/Targets.cpp


Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -6186,9 +6186,8 @@
   unsigned CRC;
   unsigned Crypto;
   unsigned Unaligned;
-  unsigned V8_1A;
-  unsigned V8_2A;
   unsigned HasFullFP16;
+  unsigned ArchKind;
 
   static const Builtin::Info BuiltinInfo[];
 
@@ -6254,6 +6253,18 @@
            static_cast<unsigned>(llvm::AArch64::ArchKind::AK_INVALID);
   }
 
+  bool hasFP16VectorArithmetic() const {
+    if (FPU != NeonMode || !HasFullFP16)
+      return false;
+
+    switch(ArchKind) {
+    default:
+      return false;
+    case llvm::ARM::AK_ARMV8_2A:
+      return true;
+    }
+  }
+
   void getTargetDefines(const LangOptions &Opts,
                         MacroBuilder &Builder) const override {
     // Target identification.
@@ -6318,9 +6329,10 @@
     if (Unaligned)
       Builder.defineMacro("__ARM_FEATURE_UNALIGNED", "1");
 
-    if (V8_1A)
+    if (ArchKind == llvm::ARM::AK_ARMV8_1A)
       Builder.defineMacro("__ARM_FEATURE_QRDMX", "1");
-    if (V8_2A && FPU == NeonMode && HasFullFP16)
+
+    if (hasFP16VectorArithmetic())
       Builder.defineMacro("__ARM_FEATURE_FP16_VECTOR_ARITHMETIC", "1");
 
     // All of the __sync_(bool|val)_compare_and_swap_(1|2|4|8) builtins work.
@@ -6348,9 +6360,8 @@
     CRC = 0;
     Crypto = 0;
     Unaligned = 1;
-    V8_1A = 0;
-    V8_2A = 0;
     HasFullFP16 = 0;
+    ArchKind = llvm::ARM::AK_INVALID;
 
     for (const auto &Feature : Features) {
       if (Feature == "+neon")
@@ -6362,9 +6373,9 @@
       if (Feature == "+strict-align")
         Unaligned = 0;
       if (Feature == "+v8.1a")
-        V8_1A = 1;
+        ArchKind = llvm::ARM::AK_ARMV8_1A;
       if (Feature == "+v8.2a")
-        V8_2A = 1;
+        ArchKind = llvm::ARM::AK_ARMV8_2A;
       if (Feature == "+fullfp16")
         HasFullFP16 = 1;
     }


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