8255351: Add detection for Graviton 2 CPUs

Reviewed-by: simonis, kvn
openjdk · Nov 26, 2020 · 2215e5a · 2215e5a · openjdk-notifier · Nov 26, 2020
1 parent 62d72de
commit 2215e5a
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp b/src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
@@ -174,6 +174,13 @@ void VM_Version::initialize() {
     }
   }
 
+  // Neoverse N1
+  if (_cpu == CPU_ARM && (_model == 0xd0c || _model2 == 0xd0c)) {
+    if (FLAG_IS_DEFAULT(UseSIMDForMemoryOps)) {
+      FLAG_SET_DEFAULT(UseSIMDForMemoryOps, true);
+    }
+  }
+
   if (_cpu == CPU_ARM) {
     if (FLAG_IS_DEFAULT(UseSignumIntrinsic)) {
       FLAG_SET_DEFAULT(UseSignumIntrinsic, true);