8255351: Add detection for Graviton 2 CPUs

eastig · Vladimir Kozlov · commit 2215e5a47e19 · 2020-11-26T19:55:39.000Z
Reviewed-by: simonis, kvn
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);

Original file line number	Diff line number	Diff line change
`@@ -174,6 +174,13 @@ void VM_Version::initialize() {`
`174`	`174`	`}`
`175`	`175`	`}`
`176`	`176`
	`177`	`+ // Neoverse N1`
	`178`	`+ if (_cpu == CPU_ARM && (_model == 0xd0c \|\| _model2 == 0xd0c)) {`
	`179`	`+ if (FLAG_IS_DEFAULT(UseSIMDForMemoryOps)) {`
	`180`	`+ FLAG_SET_DEFAULT(UseSIMDForMemoryOps, true);`
	`181`	`+ }`
	`182`	`+ }`
	`183`	`+`
`177`	`184`	`if (_cpu == CPU_ARM) {`
`178`	`185`	`if (FLAG_IS_DEFAULT(UseSignumIntrinsic)) {`
`179`	`186`	`FLAG_SET_DEFAULT(UseSignumIntrinsic, true);`