--- /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;
+        }
+    }
+}