/* * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2014, 2015, 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 * 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_GLOBALDEFINITIONS_AARCH64_HPP #define CPU_AARCH64_GLOBALDEFINITIONS_AARCH64_HPP const int StackAlignmentInBytes = 16; // Indicates whether the C calling conventions require that // 32-bit integer argument values are extended to 64 bits. const bool CCallingConventionRequiresIntsAsLongs = false; #define SUPPORTS_NATIVE_CX8 // aarch64 is not CPU_MULTI_COPY_ATOMIC // According to the ARMv8 ARM, "Concurrent modification and execution // of instructions can lead to the resulting instruction performing // any behavior that can be achieved by executing any sequence of // instructions that can be executed from the same Exception level, // except where the instruction before modification and the // instruction after modification is a B, BL, NOP, BKPT, SVC, HVC, or // SMC instruction." // // This makes the games we play when patching difficult, so when we // come across an access that needs patching we deoptimize. There are // ways we can avoid this, but these would slow down C1-compiled code // in the defauilt case. We could revisit this decision if we get any // evidence that it's worth doing. #define DEOPTIMIZE_WHEN_PATCHING #define SUPPORT_RESERVED_STACK_AREA #define THREAD_LOCAL_POLL #endif // CPU_AARCH64_GLOBALDEFINITIONS_AARCH64_HPP