--- /dev/null	2021-01-19 17:38:25.908523431 +0000
+++ new/src/cpu/aarch64/vm/jniTypes_aarch64.hpp	2021-01-25 19:31:48.355598594 +0000
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2013, Red Hat Inc.
+ * Copyright (c) 1998, 2010, Oracle and/or its affiliates.
+ * 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef CPU_AARCH64_VM_JNITYPES_AARCH64_HPP
+#define CPU_AARCH64_VM_JNITYPES_AARCH64_HPP
+
+#include "memory/allocation.hpp"
+#include "oops/oop.hpp"
+#include "prims/jni.h"
+
+// This file holds platform-dependent routines used to write primitive jni
+// types to the array of arguments passed into JavaCalls::call
+
+class JNITypes : AllStatic {
+  // These functions write a java primitive type (in native format)
+  // to a java stack slot array to be passed as an argument to JavaCalls:calls.
+  // I.e., they are functionally 'push' operations if they have a 'pos'
+  // formal parameter.  Note that jlong's and jdouble's are written
+  // _in reverse_ of the order in which they appear in the interpreter
+  // stack.  This is because call stubs (see stubGenerator_sparc.cpp)
+  // reverse the argument list constructed by JavaCallArguments (see
+  // javaCalls.hpp).
+
+public:
+  // Ints are stored in native format in one JavaCallArgument slot at *to.
+  static inline void    put_int(jint  from, intptr_t *to)           { *(jint *)(to +   0  ) =  from; }
+  static inline void    put_int(jint  from, intptr_t *to, int& pos) { *(jint *)(to + pos++) =  from; }
+  static inline void    put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; }
+
+  // Longs are stored in native format in one JavaCallArgument slot at
+  // *(to+1).
+  static inline void put_long(jlong  from, intptr_t *to) {
+    *(jlong*) (to + 1) = from;
+  }
+
+  static inline void put_long(jlong  from, intptr_t *to, int& pos) {
+    *(jlong*) (to + 1 + pos) = from;
+    pos += 2;
+  }
+
+  static inline void put_long(jlong *from, intptr_t *to, int& pos) {
+    *(jlong*) (to + 1 + pos) = *from;
+    pos += 2;
+  }
+
+  // Oops are stored in native format in one JavaCallArgument slot at *to.
+  static inline void    put_obj(oop  from, intptr_t *to)           { *(oop *)(to +   0  ) =  from; }
+  static inline void    put_obj(oop  from, intptr_t *to, int& pos) { *(oop *)(to + pos++) =  from; }
+  static inline void    put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }
+
+  // Floats are stored in native format in one JavaCallArgument slot at *to.
+  static inline void    put_float(jfloat  from, intptr_t *to)           { *(jfloat *)(to +   0  ) =  from;  }
+  static inline void    put_float(jfloat  from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) =  from; }
+  static inline void    put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
+
+#undef _JNI_SLOT_OFFSET
+#define _JNI_SLOT_OFFSET 1
+  // Doubles are stored in native word format in one JavaCallArgument
+  // slot at *(to+1).
+  static inline void put_double(jdouble  from, intptr_t *to) {
+    *(jdouble*) (to + 1) = from;
+  }
+
+  static inline void put_double(jdouble  from, intptr_t *to, int& pos) {
+    *(jdouble*) (to + 1 + pos) = from;
+    pos += 2;
+  }
+
+  static inline void put_double(jdouble *from, intptr_t *to, int& pos) {
+    *(jdouble*) (to + 1 + pos) = *from;
+    pos += 2;
+  }
+
+  // The get_xxx routines, on the other hand, actually _do_ fetch
+  // java primitive types from the interpreter stack.
+  // No need to worry about alignment on Intel.
+  static inline jint    get_int   (intptr_t *from) { return *(jint *)   from; }
+  static inline jlong   get_long  (intptr_t *from) { return *(jlong *)  (from + _JNI_SLOT_OFFSET); }
+  static inline oop     get_obj   (intptr_t *from) { return *(oop *)    from; }
+  static inline jfloat  get_float (intptr_t *from) { return *(jfloat *) from; }
+  static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); }
+#undef _JNI_SLOT_OFFSET
+};
+
+#endif // CPU_AARCH64_VM_JNITYPES_AARCH64_HPP