1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot.aarch64; 24 25 import jdk.vm.ci.hotspot.HotSpotVMConfigAccess; 26 import jdk.vm.ci.hotspot.HotSpotVMConfigStore; 27 28 /** 29 * Used to access native configuration details. 30 * 31 * All non-static, public fields in this class are so that they can be compiled as constants. 32 */ 33 class AArch64HotSpotVMConfig extends HotSpotVMConfigAccess { 34 35 AArch64HotSpotVMConfig(HotSpotVMConfigStore config) { 36 super(config); 37 } 38 39 final boolean linuxOs = System.getProperty("os.name", "").startsWith("Linux"); 40 41 final boolean useCompressedOops = getFlag("UseCompressedOops", Boolean.class); 42 43 // CPU Capabilities 44 45 /* 46 * These flags are set based on the corresponding command line flags. 47 */ 48 final boolean useBarriersForVolatile = getFlag("UseBarriersForVolatile", Boolean.class); 49 final boolean useCRC32 = getFlag("UseCRC32", Boolean.class); 50 final boolean useNeon = getFlag("UseNeon", Boolean.class); 51 final boolean useSIMDForMemoryOps = getFlag("UseSIMDForMemoryOps", Boolean.class); 52 final boolean avoidUnalignedAccesses = getFlag("AvoidUnalignedAccesses", Boolean.class); 53 final boolean useLSE = getFlag("UseLSE", Boolean.class); 54 final boolean useBlockZeroing = getFlag("UseBlockZeroing", Boolean.class); 55 56 final long vmVersionFeatures = getFieldValue("Abstract_VM_Version::_features", Long.class, "uint64_t"); 57 58 /* 59 * These flags are set if the corresponding support is in the hardware. 60 */ 61 final long aarch64FP = getConstant("VM_Version::CPU_FP", Long.class); 62 final long aarch64ASIMD = getConstant("VM_Version::CPU_ASIMD", Long.class); 63 final long aarch64EVTSTRM = getConstant("VM_Version::CPU_EVTSTRM", Long.class); 64 final long aarch64AES = getConstant("VM_Version::CPU_AES", Long.class); 65 final long aarch64PMULL = getConstant("VM_Version::CPU_PMULL", Long.class); 66 final long aarch64SHA1 = getConstant("VM_Version::CPU_SHA1", Long.class); 67 final long aarch64SHA2 = getConstant("VM_Version::CPU_SHA2", Long.class); 68 final long aarch64CRC32 = getConstant("VM_Version::CPU_CRC32", Long.class); 69 final long aarch64LSE = getConstant("VM_Version::CPU_LSE", Long.class); 70 final long aarch64STXR_PREFETCH = getConstant("VM_Version::CPU_STXR_PREFETCH", Long.class); 71 final long aarch64A53MAC = getConstant("VM_Version::CPU_A53MAC", Long.class); 72 final long aarch64DMB_ATOMICS = getConstant("VM_Version::CPU_DMB_ATOMICS", Long.class); 73 }