[13u] RFR: 8230591: AArch64: Missing intrinsics for Math.ceil, floor, rint

[Sergey Nazarkin]

Hi,

I’d like to port this change to openjdk13u. This is aarch64 part of the set where x86  is already integrated, ppc64 is on review. 

Original case:
https://bugs.openjdk.java.net/browse/JDK-8230591

ppc64 impl (mandatory for clean port, requested for integration)
https://bugs.openjdk.java.net/browse/JDK-8231649


aarch64 patch
http://cr.openjdk.java.net/~snazarki/webrev/8230591/

Original patch applies almost cleanly, only copyright dates is fixed due to missed 8224974(Implement JEP 352)
$cat src/hotspot/cpu/aarch64/assembler_aarch64.hpp.rej
--- assembler_aarch64.hpp
+++ assembler_aarch64.hpp
@@ -1,6 +1,6 @@
 /*
- * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2014, 2019, Red Hat Inc. All rights reserved.
+ * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2020, Red Hat Inc. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it


Tested with fastdebug/release hotspot tier1