src/cpu/aarch64/vm/jniFastGetField_aarch64.cpp

rev 12653 : [mq]: fastgetfield
rev 12655 : [mq]: kim-review

*** 1,7 ****
  /*
!  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2014, 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
   * under the terms of the GNU General Public License version 2 only, as
--- 1,7 ----
  /*
!  * Copyright (c) 2004, 2017, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2014, 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
   * under the terms of the GNU General Public License version 2 only, as
*** 81,90 ****
--- 81,92 ----
    __ eor(robj, c_rarg1, rcounter);
    __ eor(robj, robj, rcounter);               // obj, since
                                                // robj ^ rcounter ^ rcounter == robj
                                                // robj is address dependent on rcounter.
  
+   // If mask changes we need to ensure that the inverse is still encodable as an immediate
+   STATIC_ASSERT(JNIHandles::weak_tag_mask == 1);
    __ andr(robj, robj, ~JNIHandles::weak_tag_mask);
  
    __ ldr(robj, Address(robj, 0));             // *obj
    __ lsr(roffset, c_rarg2, 2);                // offset