--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.aarch64/src/jdk/vm/ci/aarch64/AArch64.java	Thu Dec 24 09:50:27 2015 -1000
@@ -0,0 +1,236 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+package jdk.vm.ci.aarch64;
+
+import java.nio.ByteOrder;
+import java.util.EnumSet;
+
+import jdk.vm.ci.code.Architecture;
+import jdk.vm.ci.code.Register;
+import jdk.vm.ci.code.Register.RegisterCategory;
+import jdk.vm.ci.meta.JavaKind;
+import jdk.vm.ci.meta.PlatformKind;
+
+/**
+ * Represents the AArch64 architecture.
+ */
+public class AArch64 extends Architecture {
+
+    public static final RegisterCategory CPU = new RegisterCategory("CPU");
+
+    // General purpose CPU registers
+    public static final Register r0 = new Register(0, 0, "r0", CPU);
+    public static final Register r1 = new Register(1, 1, "r1", CPU);
+    public static final Register r2 = new Register(2, 2, "r2", CPU);
+    public static final Register r3 = new Register(3, 3, "r3", CPU);
+    public static final Register r4 = new Register(4, 4, "r4", CPU);
+    public static final Register r5 = new Register(5, 5, "r5", CPU);
+    public static final Register r6 = new Register(6, 6, "r6", CPU);
+    public static final Register r7 = new Register(7, 7, "r7", CPU);
+    public static final Register r8 = new Register(8, 8, "r8", CPU);
+    public static final Register r9 = new Register(9, 9, "r9", CPU);
+    public static final Register r10 = new Register(10, 10, "r10", CPU);
+    public static final Register r11 = new Register(11, 11, "r11", CPU);
+    public static final Register r12 = new Register(12, 12, "r12", CPU);
+    public static final Register r13 = new Register(13, 13, "r13", CPU);
+    public static final Register r14 = new Register(14, 14, "r14", CPU);
+    public static final Register r15 = new Register(15, 15, "r15", CPU);
+    public static final Register r16 = new Register(16, 16, "r16", CPU);
+    public static final Register r17 = new Register(17, 17, "r17", CPU);
+    public static final Register r18 = new Register(18, 18, "r18", CPU);
+    public static final Register r19 = new Register(19, 19, "r19", CPU);
+    public static final Register r20 = new Register(20, 20, "r20", CPU);
+    public static final Register r21 = new Register(21, 21, "r21", CPU);
+    public static final Register r22 = new Register(22, 22, "r22", CPU);
+    public static final Register r23 = new Register(23, 23, "r23", CPU);
+    public static final Register r24 = new Register(24, 24, "r24", CPU);
+    public static final Register r25 = new Register(25, 25, "r25", CPU);
+    public static final Register r26 = new Register(26, 26, "r26", CPU);
+    public static final Register r27 = new Register(27, 27, "r27", CPU);
+    public static final Register r28 = new Register(28, 28, "r28", CPU);
+    public static final Register r29 = new Register(29, 29, "r29", CPU);
+    public static final Register r30 = new Register(30, 30, "r30", CPU);
+    public static final Register r31 = new Register(31, 31, "r31", CPU);
+
+    public static final Register lr = r30;
+    public static final Register zr = r31;
+    public static final Register sp = r31;
+
+    // @formatter:off
+    public static final Register[] cpuRegisters = {
+        r0,  r1,  r2,  r3,  r4,  r5,  r6,  r7,
+        r8,  r9,  r10, r11, r12, r13, r14, r15,
+        r16, r17, r18, r19, r20, r21, r22, r23,
+        r24, r25, r26, r27, r28, r29, r30, r31
+    };
+    // @formatter:on
+
+    public static final RegisterCategory SIMD = new RegisterCategory("SIMD");
+
+    // Simd registers
+    public static final Register v0 = new Register(32, 0, "v0", SIMD);
+    public static final Register v1 = new Register(33, 1, "v1", SIMD);
+    public static final Register v2 = new Register(34, 2, "v2", SIMD);
+    public static final Register v3 = new Register(35, 3, "v3", SIMD);
+    public static final Register v4 = new Register(36, 4, "v4", SIMD);
+    public static final Register v5 = new Register(37, 5, "v5", SIMD);
+    public static final Register v6 = new Register(38, 6, "v6", SIMD);
+    public static final Register v7 = new Register(39, 7, "v7", SIMD);
+    public static final Register v8 = new Register(40, 8, "v8", SIMD);
+    public static final Register v9 = new Register(41, 9, "v9", SIMD);
+    public static final Register v10 = new Register(42, 10, "v10", SIMD);
+    public static final Register v11 = new Register(43, 11, "v11", SIMD);
+    public static final Register v12 = new Register(44, 12, "v12", SIMD);
+    public static final Register v13 = new Register(45, 13, "v13", SIMD);
+    public static final Register v14 = new Register(46, 14, "v14", SIMD);
+    public static final Register v15 = new Register(47, 15, "v15", SIMD);
+    public static final Register v16 = new Register(48, 16, "v16", SIMD);
+    public static final Register v17 = new Register(49, 17, "v17", SIMD);
+    public static final Register v18 = new Register(50, 18, "v18", SIMD);
+    public static final Register v19 = new Register(51, 19, "v19", SIMD);
+    public static final Register v20 = new Register(52, 20, "v20", SIMD);
+    public static final Register v21 = new Register(53, 21, "v21", SIMD);
+    public static final Register v22 = new Register(54, 22, "v22", SIMD);
+    public static final Register v23 = new Register(55, 23, "v23", SIMD);
+    public static final Register v24 = new Register(56, 24, "v24", SIMD);
+    public static final Register v25 = new Register(57, 25, "v25", SIMD);
+    public static final Register v26 = new Register(58, 26, "v26", SIMD);
+    public static final Register v27 = new Register(59, 27, "v27", SIMD);
+    public static final Register v28 = new Register(60, 28, "v28", SIMD);
+    public static final Register v29 = new Register(61, 29, "v29", SIMD);
+    public static final Register v30 = new Register(62, 30, "v30", SIMD);
+    public static final Register v31 = new Register(63, 31, "v31", SIMD);
+
+    // @formatter:off
+    public static final Register[] simdRegisters = {
+        v0,  v1,  v2,  v3,  v4,  v5,  v6,  v7,
+        v8,  v9,  v10, v11, v12, v13, v14, v15,
+        v16, v17, v18, v19, v20, v21, v22, v23,
+        v24, v25, v26, v27, v28, v29, v30, v31
+    };
+    // @formatter:on
+
+    // @formatter:off
+    public static final Register[] allRegisters = {
+        r0,  r1,  r2,  r3,  r4,  r5,  r6,  r7,
+        r8,  r9,  r10, r11, r12, r13, r14, r15,
+        r16, r17, r18, r19, r20, r21, r22, r23,
+        r24, r25, r26, r27, r28, r29, r30, r31,
+
+        v0,  v1,  v2,  v3,  v4,  v5,  v6,  v7,
+        v8,  v9,  v10, v11, v12, v13, v14, v15,
+        v16, v17, v18, v19, v20, v21, v22, v23,
+        v24, v25, v26, v27, v28, v29, v30, v31
+    };
+    // @formatter:on
+
+    /**
+     * Basic set of CPU features mirroring what is returned from the cpuid instruction. See:
+     * {@code VM_Version::cpuFeatureFlags}.
+     */
+    public static enum CPUFeature {
+        FP,
+        ASIMD,
+        EVTSTRM,
+        AES,
+        PMULL,
+        SHA1,
+        SHA2,
+        CRC32,
+        A53MAC,
+        DMB_ATOMICS
+    }
+
+    private final EnumSet<CPUFeature> features;
+
+    /**
+     * Set of flags to control code emission.
+     */
+    public static enum Flag {
+        UseBarriersForVolatile,
+        UseCRC32,
+        UseNeon
+    }
+
+    private final EnumSet<Flag> flags;
+
+    public AArch64(EnumSet<CPUFeature> features, EnumSet<Flag> flags) {
+        super("aarch64", AArch64Kind.QWORD, ByteOrder.LITTLE_ENDIAN, true, allRegisters, 0, 0, 0);
+        this.features = features;
+        this.flags = flags;
+        assert features.contains(CPUFeature.FP) : "minimum config for aarch64";
+    }
+
+    public EnumSet<CPUFeature> getFeatures() {
+        return features;
+    }
+
+    public EnumSet<Flag> getFlags() {
+        return flags;
+    }
+
+    @Override
+    public PlatformKind getPlatformKind(JavaKind javaKind) {
+        switch (javaKind) {
+            case Boolean:
+            case Byte:
+                return AArch64Kind.BYTE;
+            case Short:
+            case Char:
+                return AArch64Kind.WORD;
+            case Int:
+                return AArch64Kind.DWORD;
+            case Long:
+            case Object:
+                return AArch64Kind.QWORD;
+            case Float:
+                return AArch64Kind.SINGLE;
+            case Double:
+                return AArch64Kind.DOUBLE;
+            default:
+                return null;
+        }
+    }
+
+    @Override
+    public boolean canStoreValue(RegisterCategory category, PlatformKind platformKind) {
+        AArch64Kind kind = (AArch64Kind) platformKind;
+        if (kind.isInteger()) {
+            return category.equals(CPU);
+        } else if (kind.isSIMD()) {
+            return category.equals(SIMD);
+        }
+        return false;
+    }
+
+    @Override
+    public AArch64Kind getLargestStorableKind(RegisterCategory category) {
+        if (category.equals(CPU)) {
+            return AArch64Kind.QWORD;
+        } else if (category.equals(SIMD)) {
+            return AArch64Kind.V128_QWORD;
+        } else {
+            return null;
+        }
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.aarch64/src/jdk/vm/ci/aarch64/AArch64Kind.java	Thu Dec 24 09:50:27 2015 -1000
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+package jdk.vm.ci.aarch64;
+
+import jdk.vm.ci.meta.PlatformKind;
+
+public enum AArch64Kind implements PlatformKind {
+
+    // scalar
+    BYTE(1),
+    WORD(2),
+    DWORD(4),
+    QWORD(8),
+    SINGLE(4),
+    DOUBLE(8),
+
+    // SIMD
+    V32_BYTE(4, BYTE),
+    V32_WORD(4, WORD),
+    V64_BYTE(8, BYTE),
+    V64_WORD(8, WORD),
+    V64_DWORD(8, DWORD),
+    V128_BYTE(16, BYTE),
+    V128_WORD(16, WORD),
+    V128_DWORD(16, DWORD),
+    V128_QWORD(16, QWORD),
+    V128_SINGLE(16, SINGLE),
+    V128_DOUBLE(16, DOUBLE),
+
+    MASK8(1),
+    MASK16(2),
+    MASK32(4),
+    MASK64(8);
+
+    private final int size;
+    private final int vectorLength;
+
+    private final AArch64Kind scalar;
+    private final EnumKey<AArch64Kind> key = new EnumKey<>(this);
+
+    private AArch64Kind(int size) {
+        this.size = size;
+        this.scalar = this;
+        this.vectorLength = 1;
+    }
+
+    private AArch64Kind(int size, AArch64Kind scalar) {
+        this.size = size;
+        this.scalar = scalar;
+
+        assert size % scalar.size == 0;
+        this.vectorLength = size / scalar.size;
+    }
+
+    public AArch64Kind getScalar() {
+        return scalar;
+    }
+
+    public int getSizeInBytes() {
+        return size;
+    }
+
+    public int getVectorLength() {
+        return vectorLength;
+    }
+
+    public Key getKey() {
+        return key;
+    }
+
+    public boolean isInteger() {
+        switch (this) {
+            case BYTE:
+            case WORD:
+            case DWORD:
+            case QWORD:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    public boolean isSIMD() {
+        switch (this) {
+            case SINGLE:
+            case DOUBLE:
+            case V32_BYTE:
+            case V32_WORD:
+            case V64_BYTE:
+            case V64_WORD:
+            case V64_DWORD:
+            case V128_BYTE:
+            case V128_WORD:
+            case V128_DWORD:
+            case V128_QWORD:
+            case V128_SINGLE:
+            case V128_DOUBLE:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    public boolean isMask() {
+        switch (this) {
+            case MASK8:
+            case MASK16:
+            case MASK32:
+            case MASK64:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    public char getTypeChar() {
+        switch (this) {
+            case BYTE:
+                return 'b';
+            case WORD:
+                return 'w';
+            case DWORD:
+                return 'd';
+            case QWORD:
+                return 'q';
+            case SINGLE:
+                return 'S';
+            case DOUBLE:
+                return 'D';
+            case V32_BYTE:
+            case V32_WORD:
+            case V64_BYTE:
+            case V64_WORD:
+            case V64_DWORD:
+            case V128_BYTE:
+            case V128_WORD:
+            case V128_DWORD:
+            case V128_QWORD:
+            case V128_SINGLE:
+            case V128_DOUBLE:
+                return 'v';
+            case MASK8:
+            case MASK16:
+            case MASK32:
+            case MASK64:
+                return 'k';
+            default:
+                return '-';
+        }
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.hotspot.aarch64/src/jdk/vm/ci/hotspot/aarch64/AArch64HotSpotJVMCIBackendFactory.java	Thu Dec 24 09:50:27 2015 -1000
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+package jdk.vm.ci.hotspot.aarch64;
+
+import static jdk.vm.ci.inittimer.InitTimer.timer;
+
+import java.util.EnumSet;
+
+import jdk.vm.ci.aarch64.AArch64;
+import jdk.vm.ci.code.Architecture;
+import jdk.vm.ci.code.RegisterConfig;
+import jdk.vm.ci.code.TargetDescription;
+import jdk.vm.ci.code.stack.StackIntrospection;
+import jdk.vm.ci.hotspot.HotSpotCodeCacheProvider;
+import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
+import jdk.vm.ci.hotspot.HotSpotJVMCIBackendFactory;
+import jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider;
+import jdk.vm.ci.hotspot.HotSpotMetaAccessProvider;
+import jdk.vm.ci.hotspot.HotSpotStackIntrospection;
+import jdk.vm.ci.hotspot.HotSpotVMConfig;
+import jdk.vm.ci.inittimer.InitTimer;
+import jdk.vm.ci.meta.ConstantReflectionProvider;
+import jdk.vm.ci.runtime.JVMCIBackend;
+import jdk.vm.ci.service.ServiceProvider;
+
+@ServiceProvider(HotSpotJVMCIBackendFactory.class)
+public class AArch64HotSpotJVMCIBackendFactory implements HotSpotJVMCIBackendFactory {
+
+    protected EnumSet<AArch64.CPUFeature> computeFeatures(@SuppressWarnings("unused") HotSpotVMConfig config) {
+        // Configure the feature set using the HotSpot flag settings.
+        EnumSet<AArch64.CPUFeature> features = EnumSet.noneOf(AArch64.CPUFeature.class);
+        return features;
+    }
+
+    protected EnumSet<AArch64.Flag> computeFlags(@SuppressWarnings("unused") HotSpotVMConfig config) {
+        EnumSet<AArch64.Flag> flags = EnumSet.noneOf(AArch64.Flag.class);
+        return flags;
+    }
+
+    protected TargetDescription createTarget(HotSpotVMConfig config) {
+        final int stackFrameAlignment = 16;
+        final int implicitNullCheckLimit = 4096;
+        final boolean inlineObjects = true;
+        Architecture arch = new AArch64(computeFeatures(config), computeFlags(config));
+        return new TargetDescription(arch, true, stackFrameAlignment, implicitNullCheckLimit, inlineObjects);
+    }
+
+    protected HotSpotConstantReflectionProvider createConstantReflection(HotSpotJVMCIRuntimeProvider runtime) {
+        return new HotSpotConstantReflectionProvider(runtime);
+    }
+
+    protected RegisterConfig createRegisterConfig(HotSpotJVMCIRuntimeProvider runtime, TargetDescription target) {
+        return new AArch64HotSpotRegisterConfig(target.arch, runtime.getConfig());
+    }
+
+    protected HotSpotCodeCacheProvider createCodeCache(HotSpotJVMCIRuntimeProvider runtime, TargetDescription target, RegisterConfig regConfig) {
+        return new HotSpotCodeCacheProvider(runtime, runtime.getConfig(), target, regConfig);
+    }
+
+    protected HotSpotMetaAccessProvider createMetaAccess(HotSpotJVMCIRuntimeProvider runtime) {
+        return new HotSpotMetaAccessProvider(runtime);
+    }
+
+    @Override
+    public String getArchitecture() {
+        return "aarch64";
+    }
+
+    @Override
+    public String toString() {
+        return "JVMCIBackend:" + getArchitecture();
+    }
+
+    @SuppressWarnings("try")
+    public JVMCIBackend createJVMCIBackend(HotSpotJVMCIRuntimeProvider runtime, JVMCIBackend host) {
+
+        assert host == null;
+        TargetDescription target = createTarget(runtime.getConfig());
+
+        RegisterConfig regConfig;
+        HotSpotCodeCacheProvider codeCache;
+        ConstantReflectionProvider constantReflection;
+        HotSpotMetaAccessProvider metaAccess;
+        StackIntrospection stackIntrospection;
+        try (InitTimer t = timer("create providers")) {
+            try (InitTimer rt = timer("create MetaAccess provider")) {
+                metaAccess = createMetaAccess(runtime);
+            }
+            try (InitTimer rt = timer("create RegisterConfig")) {
+                regConfig = createRegisterConfig(runtime, target);
+            }
+            try (InitTimer rt = timer("create CodeCache provider")) {
+                codeCache = createCodeCache(runtime, target, regConfig);
+            }
+            try (InitTimer rt = timer("create ConstantReflection provider")) {
+                constantReflection = createConstantReflection(runtime);
+            }
+            try (InitTimer rt = timer("create StackIntrospection provider")) {
+                stackIntrospection = new HotSpotStackIntrospection(runtime);
+            }
+        }
+        try (InitTimer rt = timer("instantiate backend")) {
+            return createBackend(metaAccess, codeCache, constantReflection, stackIntrospection);
+        }
+    }
+
+    protected JVMCIBackend createBackend(HotSpotMetaAccessProvider metaAccess, HotSpotCodeCacheProvider codeCache, ConstantReflectionProvider constantReflection, StackIntrospection stackIntrospection) {
+        return new JVMCIBackend(metaAccess, codeCache, constantReflection, stackIntrospection);
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.hotspot.aarch64/src/jdk/vm/ci/hotspot/aarch64/AArch64HotSpotRegisterConfig.java	Thu Dec 24 09:50:27 2015 -1000
@@ -0,0 +1,298 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+package jdk.vm.ci.hotspot.aarch64;
+
+import static jdk.vm.ci.aarch64.AArch64.lr;
+import static jdk.vm.ci.aarch64.AArch64.r0;
+import static jdk.vm.ci.aarch64.AArch64.r1;
+import static jdk.vm.ci.aarch64.AArch64.r12;
+import static jdk.vm.ci.aarch64.AArch64.r2;
+import static jdk.vm.ci.aarch64.AArch64.r27;
+import static jdk.vm.ci.aarch64.AArch64.r28;
+import static jdk.vm.ci.aarch64.AArch64.r29;
+import static jdk.vm.ci.aarch64.AArch64.r3;
+import static jdk.vm.ci.aarch64.AArch64.r4;
+import static jdk.vm.ci.aarch64.AArch64.r5;
+import static jdk.vm.ci.aarch64.AArch64.r6;
+import static jdk.vm.ci.aarch64.AArch64.r7;
+import static jdk.vm.ci.aarch64.AArch64.r9;
+import static jdk.vm.ci.aarch64.AArch64.sp;
+import static jdk.vm.ci.aarch64.AArch64.v0;
+import static jdk.vm.ci.aarch64.AArch64.v1;
+import static jdk.vm.ci.aarch64.AArch64.v2;
+import static jdk.vm.ci.aarch64.AArch64.v3;
+import static jdk.vm.ci.aarch64.AArch64.v4;
+import static jdk.vm.ci.aarch64.AArch64.v5;
+import static jdk.vm.ci.aarch64.AArch64.v6;
+import static jdk.vm.ci.aarch64.AArch64.v7;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import jdk.vm.ci.aarch64.AArch64;
+import jdk.vm.ci.code.Architecture;
+import jdk.vm.ci.code.CallingConvention;
+import jdk.vm.ci.code.CallingConvention.Type;
+import jdk.vm.ci.code.Register;
+import jdk.vm.ci.code.RegisterAttributes;
+import jdk.vm.ci.code.RegisterConfig;
+import jdk.vm.ci.code.StackSlot;
+import jdk.vm.ci.code.TargetDescription;
+import jdk.vm.ci.common.JVMCIError;
+import jdk.vm.ci.hotspot.HotSpotVMConfig;
+import jdk.vm.ci.meta.AllocatableValue;
+import jdk.vm.ci.meta.JavaKind;
+import jdk.vm.ci.meta.JavaType;
+import jdk.vm.ci.meta.LIRKind;
+import jdk.vm.ci.meta.PlatformKind;
+import jdk.vm.ci.meta.Value;
+
+public class AArch64HotSpotRegisterConfig implements RegisterConfig {
+
+    private final Architecture architecture;
+
+    private final Register[] allocatable;
+
+    private final int maxFrameSize;
+
+    /**
+     * The caller saved registers always include all parameter registers.
+     */
+    private final Register[] callerSaved;
+
+    private final boolean allAllocatableAreCallerSaved;
+
+    private final RegisterAttributes[] attributesMap;
+
+    public int getMaximumFrameSize() {
+        return maxFrameSize;
+    }
+
+    @Override
+    public Register[] getAllocatableRegisters() {
+        return allocatable.clone();
+    }
+
+    public Register[] filterAllocatableRegisters(PlatformKind kind, Register[] registers) {
+        ArrayList<Register> list = new ArrayList<>();
+        for (Register reg : registers) {
+            if (architecture.canStoreValue(reg.getRegisterCategory(), kind)) {
+                list.add(reg);
+            }
+        }
+
+        Register[] ret = list.toArray(new Register[list.size()]);
+        return ret;
+    }
+
+    @Override
+    public RegisterAttributes[] getAttributesMap() {
+        return attributesMap.clone();
+    }
+
+    private final Register[] javaGeneralParameterRegisters = {r1, r2, r3, r4, r5, r6, r7, r0};
+    private final Register[] nativeGeneralParameterRegisters = {r0, r1, r2, r3, r4, r5, r6, r7};
+    private final Register[] simdParameterRegisters = {v0, v1, v2, v3, v4, v5, v6, v7};
+
+    public static final Register inlineCacheRegister = r9;
+
+    /**
+     * Vtable stubs expect the metaspace Method in r12.
+     */
+    public static final Register metaspaceMethodRegister = r12;
+
+    public static final Register heapBaseRegister = r27;
+    public static final Register threadRegister = r28;
+    public static final Register fp = r29;
+
+    private static Register[] initAllocatable(Architecture arch, boolean reserveForHeapBase) {
+        Register[] allRegisters = arch.getAvailableValueRegisters();
+        Register[] registers = new Register[allRegisters.length - (reserveForHeapBase ? 5 : 4)];
+
+        int idx = 0;
+        for (Register reg : allRegisters) {
+            if (reg.equals(threadRegister) || reg.equals(fp) || reg.equals(lr) || reg.equals(sp)) {
+                // skip thread register, frame pointer, link register and stack pointer
+                continue;
+            }
+            if (reserveForHeapBase && reg.equals(heapBaseRegister)) {
+                // skip heap base register
+                continue;
+            }
+
+            registers[idx++] = reg;
+        }
+
+        assert idx == registers.length;
+        return registers;
+    }
+
+    public AArch64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config) {
+        this(architecture, config, initAllocatable(architecture, config.useCompressedOops));
+        assert callerSaved.length >= allocatable.length;
+    }
+
+    public AArch64HotSpotRegisterConfig(Architecture architecture, HotSpotVMConfig config, Register[] allocatable) {
+        this.architecture = architecture;
+        this.maxFrameSize = config.maxFrameSize;
+
+        this.allocatable = allocatable.clone();
+        Set<Register> callerSaveSet = new HashSet<>();
+        Collections.addAll(callerSaveSet, allocatable);
+        Collections.addAll(callerSaveSet, simdParameterRegisters);
+        Collections.addAll(callerSaveSet, javaGeneralParameterRegisters);
+        Collections.addAll(callerSaveSet, nativeGeneralParameterRegisters);
+        callerSaved = callerSaveSet.toArray(new Register[callerSaveSet.size()]);
+
+        allAllocatableAreCallerSaved = true;
+        attributesMap = RegisterAttributes.createMap(this, AArch64.allRegisters);
+    }
+
+    @Override
+    public Register[] getCallerSaveRegisters() {
+        return callerSaved;
+    }
+
+    public Register[] getCalleeSaveRegisters() {
+        return null;
+    }
+
+    @Override
+    public boolean areAllAllocatableRegistersCallerSaved() {
+        return allAllocatableAreCallerSaved;
+    }
+
+    @Override
+    public Register getRegisterForRole(int index) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target, boolean stackOnly) {
+        if (type == Type.NativeCall) {
+            return callingConvention(nativeGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
+        }
+        // On x64, parameter locations are the same whether viewed
+        // from the caller or callee perspective
+        return callingConvention(javaGeneralParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
+    }
+
+    public Register[] getCallingConventionRegisters(Type type, JavaKind kind) {
+        switch (kind) {
+            case Boolean:
+            case Byte:
+            case Short:
+            case Char:
+            case Int:
+            case Long:
+            case Object:
+                return type == Type.NativeCall ? nativeGeneralParameterRegisters : javaGeneralParameterRegisters;
+            case Float:
+            case Double:
+                return simdParameterRegisters;
+            default:
+                throw JVMCIError.shouldNotReachHere();
+        }
+    }
+
+    private CallingConvention callingConvention(Register[] generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, Type type, TargetDescription target, boolean stackOnly) {
+        AllocatableValue[] locations = new AllocatableValue[parameterTypes.length];
+
+        int currentGeneral = 0;
+        int currentSIMD = 0;
+        int currentStackOffset = 0;
+
+        for (int i = 0; i < parameterTypes.length; i++) {
+            final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind();
+
+            switch (kind) {
+                case Byte:
+                case Boolean:
+                case Short:
+                case Char:
+                case Int:
+                case Long:
+                case Object:
+                    if (!stackOnly && currentGeneral < generalParameterRegisters.length) {
+                        Register register = generalParameterRegisters[currentGeneral++];
+                        locations[i] = register.asValue(target.getLIRKind(kind));
+                    }
+                    break;
+                case Float:
+                case Double:
+                    if (!stackOnly && currentSIMD < simdParameterRegisters.length) {
+                        Register register = simdParameterRegisters[currentSIMD++];
+                        locations[i] = register.asValue(target.getLIRKind(kind));
+                    }
+                    break;
+                default:
+                    throw JVMCIError.shouldNotReachHere();
+            }
+
+            if (locations[i] == null) {
+                LIRKind lirKind = target.getLIRKind(kind);
+                locations[i] = StackSlot.get(lirKind, currentStackOffset, !type.out);
+                currentStackOffset += Math.max(lirKind.getPlatformKind().getSizeInBytes(), target.wordSize);
+            }
+        }
+
+        JavaKind returnKind = returnType == null ? JavaKind.Void : returnType.getJavaKind();
+        AllocatableValue returnLocation = returnKind == JavaKind.Void ? Value.ILLEGAL : getReturnRegister(returnKind).asValue(target.getLIRKind(returnKind.getStackKind()));
+        return new CallingConvention(currentStackOffset, returnLocation, locations);
+    }
+
+    @Override
+    public Register getReturnRegister(JavaKind kind) {
+        switch (kind) {
+            case Boolean:
+            case Byte:
+            case Char:
+            case Short:
+            case Int:
+            case Long:
+            case Object:
+                return r0;
+            case Float:
+            case Double:
+                return v0;
+            case Void:
+            case Illegal:
+                return null;
+            default:
+                throw new UnsupportedOperationException("no return register for type " + kind);
+        }
+    }
+
+    @Override
+    public Register getFrameRegister() {
+        return sp;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Allocatable: " + Arrays.toString(getAllocatableRegisters()) + "%n" + "CallerSave:  " + Arrays.toString(getCallerSaveRegisters()) + "%n");
+    }
+}

--- a/make/jvmci.make	Mon Dec 21 15:53:56 2015 +0100
+++ b/make/jvmci.make	Thu Dec 24 09:50:27 2015 -1000
@@ -118,6 +118,7 @@
 JVMCI_API_SRC += $(shell find jvmci/jdk.vm.ci.code/src -type f 2> /dev/null)
 JVMCI_API_SRC += $(shell find jvmci/jdk.vm.ci.runtime/src -type f 2> /dev/null)
 JVMCI_API_SRC += $(shell find jvmci/jdk.vm.ci.common/src -type f 2> /dev/null)
+JVMCI_API_SRC += $(shell find jvmci/jdk.vm.ci.aarch64/src -type f 2> /dev/null)
 JVMCI_API_SRC += $(shell find jvmci/jdk.vm.ci.amd64/src -type f 2> /dev/null)
 JVMCI_API_SRC += $(shell find jvmci/jdk.vm.ci.sparc/src -type f 2> /dev/null)
 
@@ -146,6 +147,7 @@
 JVMCI_HOTSPOTVMCONFIG_PROCESSOR_DEP_JARS = $(TARGET)/jvmci-service.jar $(TARGET)/jvmci-api.jar $(TARGET)/jvmci-hotspotvmconfig.jar
 
 JVMCI_HOTSPOT_SRC += $(shell find jvmci/jdk.vm.ci.hotspot/src -type f 2> /dev/null)
+JVMCI_HOTSPOT_SRC += $(shell find jvmci/jdk.vm.ci.hotspot.aarch64/src -type f 2> /dev/null)
 JVMCI_HOTSPOT_SRC += $(shell find jvmci/jdk.vm.ci.hotspot.amd64/src -type f 2> /dev/null)
 JVMCI_HOTSPOT_SRC += $(shell find jvmci/jdk.vm.ci.hotspot.sparc/src -type f 2> /dev/null)
 ifeq ($(shell find $(ABS_BOOTDIR)/ -name 'jfr.jar'; echo $$?),'0')

--- a/mx.jvmci/suite.py	Mon Dec 21 15:53:56 2015 +0100
+++ b/mx.jvmci/suite.py	Thu Dec 24 09:50:27 2015 -1000
@@ -138,6 +138,15 @@
 
     # ------------- JVMCI:HotSpot -------------
 
+    "jdk.vm.ci.aarch64" : {
+      "subDir" : "jvmci",
+      "sourceDirs" : ["src"],
+      "dependencies" : ["jdk.vm.ci.code"],
+      "checkstyle" : "jdk.vm.ci.service",
+      "javaCompliance" : "1.8",
+      "workingSets" : "JVMCI,AArch64",
+    },
+
     "jdk.vm.ci.amd64" : {
       "subDir" : "jvmci",
       "sourceDirs" : ["src"],
@@ -191,6 +200,21 @@
       "workingSets" : "JVMCI,HotSpot,Codegen",
     },
 
+    "jdk.vm.ci.hotspot.aarch64" : {
+      "subDir" : "jvmci",
+      "sourceDirs" : ["src"],
+      "dependencies" : [
+        "jdk.vm.ci.aarch64",
+        "jdk.vm.ci.hotspot",
+      ],
+      "checkstyle" : "jdk.vm.ci.service",
+      "annotationProcessors" : [
+        "JVMCI_SERVICE_PROCESSOR",
+      ],
+      "javaCompliance" : "1.8",
+      "workingSets" : "JVMCI,HotSpot,AArch64",
+    },
+
     "jdk.vm.ci.hotspot.amd64" : {
       "subDir" : "jvmci",
       "sourceDirs" : ["src"],
@@ -315,6 +339,7 @@
         "jdk.vm.ci.inittimer",
         "jdk.vm.ci.runtime",
         "jdk.vm.ci.common",
+        "jdk.vm.ci.aarch64",
         "jdk.vm.ci.amd64",
         "jdk.vm.ci.sparc",
       ],
@@ -333,6 +358,7 @@
     "JVMCI_HOTSPOT" : {
       "subDir" : "jvmci",
       "dependencies" : [
+        "jdk.vm.ci.hotspot.aarch64",
         "jdk.vm.ci.hotspot.amd64",
         "jdk.vm.ci.hotspot.sparc",
         "jdk.vm.ci.hotspot.jfr",