--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.hotspot.sparc/src/com/oracle/jvmci/hotspot/sparc/SPARCHotSpotRegisterConfig.java	Tue Jun 02 18:32:11 2015 -0700
@@ -0,0 +1,304 @@
+/*
+ * Copyright (c) 2013, 2014, 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 com.oracle.jvmci.hotspot.sparc;
+
+import com.oracle.jvmci.code.Architecture;
+import com.oracle.jvmci.code.TargetDescription;
+import com.oracle.jvmci.code.CallingConvention;
+import com.oracle.jvmci.code.CalleeSaveLayout;
+import com.oracle.jvmci.code.RegisterAttributes;
+import com.oracle.jvmci.code.StackSlot;
+import com.oracle.jvmci.code.RegisterConfig;
+import com.oracle.jvmci.code.Register;
+import com.oracle.jvmci.meta.Kind;
+import com.oracle.jvmci.meta.JavaType;
+import com.oracle.jvmci.meta.PlatformKind;
+import com.oracle.jvmci.meta.Value;
+import com.oracle.jvmci.meta.AllocatableValue;
+import com.oracle.jvmci.sparc.*;
+
+import static com.oracle.jvmci.sparc.SPARC.*;
+
+import java.util.*;
+
+import com.oracle.jvmci.code.CallingConvention.Type;
+import com.oracle.jvmci.common.*;
+import com.oracle.jvmci.hotspot.*;
+
+public class SPARCHotSpotRegisterConfig implements RegisterConfig {
+
+    private final Architecture architecture;
+
+    private final Register[] allocatable;
+
+    private final RegisterAttributes[] attributesMap;
+
+    @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)) {
+                // Special treatment for double precision
+                // TODO: This is wasteful it uses only half of the registers as float.
+                if (kind == Kind.Double) {
+                    if (reg.name.startsWith("d")) {
+                        list.add(reg);
+                    }
+                } else if (kind == Kind.Float) {
+                    if (reg.name.startsWith("f")) {
+                        list.add(reg);
+                    }
+                } else {
+                    list.add(reg);
+                }
+            }
+        }
+
+        Register[] ret = list.toArray(new Register[list.size()]);
+        return ret;
+    }
+
+    @Override
+    public RegisterAttributes[] getAttributesMap() {
+        return attributesMap.clone();
+    }
+
+    private final Register[] cpuCallerParameterRegisters = {o0, o1, o2, o3, o4, o5};
+    private final Register[] cpuCalleeParameterRegisters = {i0, i1, i2, i3, i4, i5};
+
+    private final Register[] fpuParameterRegisters = {f0, f1, f2, f3, f4, f5, f6, f7};
+    private final Register[] fpuDoubleParameterRegisters = {d0, null, d2, null, d4, null, d6, null};
+    // @formatter:off
+    private final Register[] callerSaveRegisters =
+                   {g1, g2, g3, g4, g5, g6, g7,
+                    o0, o1, o2, o3, o4, o5, o7,
+                    f0,  f1,  f2,  f3,  f4,  f5,  f6,  f7,
+                    f8,  f9,  f10, f11, f12, f13, f14, f15,
+                    f16, f17, f18, f19, f20, f21, f22, f23,
+                    f24, f25, f26, f27, f28, f29, f30, f31,
+                    d32, d34, d36, d38, d40, d42, d44, d46,
+                    d48, d50, d52, d54, d56, d58, d60, d62};
+    // @formatter:on
+
+    /**
+     * Registers saved by the callee. This lists all L and I registers which are saved in the
+     * register window.
+     */
+    private final Register[] calleeSaveRegisters = {l0, l1, l2, l3, l4, l5, l6, l7, i0, i1, i2, i3, i4, i5, i6, i7};
+
+    private final CalleeSaveLayout csl;
+
+    private static Register[] initAllocatable(boolean reserveForHeapBase) {
+        Register[] registers = null;
+        if (reserveForHeapBase) {
+            // @formatter:off
+            registers = new Register[]{
+                        // TODO this is not complete
+                        // o7 cannot be used as register because it is always overwritten on call
+                        // and the current register handler would ignore this fact if the called
+                        // method still does not modify registers, in fact o7 is modified by the Call instruction
+                        // There would be some extra handlin necessary to be able to handle the o7 properly for local usage
+                        o0, o1, o2, o3, o4, o5, /*o6, o7,*/
+                        l0, l1, l2, l3, l4, l5, l6, l7,
+                        i0, i1, i2, i3, i4, i5, /*i6,*/ /*i7,*/
+                        //f0, f1, f2, f3, f4, f5, f6, f7,
+                        f8,  f9,  f10, f11, f12, f13, f14, f15,
+                        f16, f17, f18, f19, f20, f21, f22, f23,
+                        f24, f25, f26, f27, f28, f29, f30, f31,
+                        d32, d34, d36, d38, d40, d42, d44, d46,
+                        d48, d50, d52, d54, d56, d58, d60, d62
+            };
+            // @formatter:on
+        } else {
+            // @formatter:off
+            registers = new Register[]{
+                        // TODO this is not complete
+                        o0, o1, o2, o3, o4, o5, /*o6, o7,*/
+                        l0, l1, l2, l3, l4, l5, l6, l7,
+                        i0, i1, i2, i3, i4, i5, /*i6,*/ /*i7,*/
+//                        f0, f1, f2, f3, f4, f5, f6, f7
+                        f8,  f9,  f10, f11, f12, f13, f14, f15,
+                        f16, f17, f18, f19, f20, f21, f22, f23,
+                        f24, f25, f26, f27, f28, f29, f30, f31,
+                        d32, d34, d36, d38, d40, d42, d44, d46,
+                        d48, d50, d52, d54, d56, d58, d60, d62
+            };
+            // @formatter:on
+        }
+
+        return registers;
+    }
+
+    public SPARCHotSpotRegisterConfig(TargetDescription target, HotSpotVMConfig config) {
+        this(target, initAllocatable(config.useCompressedOops));
+    }
+
+    public SPARCHotSpotRegisterConfig(TargetDescription target, Register[] allocatable) {
+        this.architecture = target.arch;
+
+        csl = new CalleeSaveLayout(target, -1, -1, target.arch.getWordSize(), calleeSaveRegisters);
+        this.allocatable = allocatable.clone();
+        attributesMap = RegisterAttributes.createMap(this, SPARC.allRegisters);
+    }
+
+    @Override
+    public Register[] getCallerSaveRegisters() {
+        return callerSaveRegisters;
+    }
+
+    @Override
+    public boolean areAllAllocatableRegistersCallerSaved() {
+        return false;
+    }
+
+    @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.JavaCall || type == Type.NativeCall) {
+            return callingConvention(cpuCallerParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
+        }
+        if (type == Type.JavaCallee) {
+            return callingConvention(cpuCalleeParameterRegisters, returnType, parameterTypes, type, target, stackOnly);
+        }
+        throw JVMCIError.shouldNotReachHere();
+    }
+
+    public Register[] getCallingConventionRegisters(Type type, Kind kind) {
+        if (architecture.canStoreValue(FPUs, kind) || architecture.canStoreValue(FPUd, kind)) {
+            return fpuParameterRegisters;
+        }
+        assert architecture.canStoreValue(CPU, kind);
+        return type == Type.JavaCallee ? cpuCalleeParameterRegisters : cpuCallerParameterRegisters;
+    }
+
+    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 currentFloating = 0;
+        int currentStackOffset = 0;
+
+        for (int i = 0; i < parameterTypes.length; i++) {
+            final Kind kind = parameterTypes[i].getKind();
+
+            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 Double:
+                    if (!stackOnly && currentFloating < fpuParameterRegisters.length) {
+                        if (currentFloating % 2 != 0) {
+                            // Make register number even to be a double reg
+                            currentFloating++;
+                        }
+                        Register register = fpuDoubleParameterRegisters[currentFloating];
+                        currentFloating += 2; // Only every second is a double register
+                        locations[i] = register.asValue(target.getLIRKind(kind));
+                    }
+                    break;
+                case Float:
+                    if (!stackOnly && currentFloating < fpuParameterRegisters.length) {
+                        Register register = fpuParameterRegisters[currentFloating++];
+                        locations[i] = register.asValue(target.getLIRKind(kind));
+                    }
+                    break;
+                default:
+                    throw JVMCIError.shouldNotReachHere();
+            }
+
+            if (locations[i] == null) {
+                // Stack slot is always aligned to its size in bytes but minimum wordsize
+                int typeSize = SPARC.spillSlotSize(target, kind);
+                currentStackOffset = roundUp(currentStackOffset, typeSize);
+                locations[i] = StackSlot.get(target.getLIRKind(kind.getStackKind()), currentStackOffset, !type.out);
+                currentStackOffset += typeSize;
+            }
+        }
+
+        Kind returnKind = returnType == null ? Kind.Void : returnType.getKind();
+        AllocatableValue returnLocation = returnKind == Kind.Void ? Value.ILLEGAL : getReturnRegister(returnKind, type).asValue(target.getLIRKind(returnKind.getStackKind()));
+        return new CallingConvention(currentStackOffset, returnLocation, locations);
+    }
+
+    private static int roundUp(int number, int mod) {
+        return ((number + mod - 1) / mod) * mod;
+    }
+
+    @Override
+    public Register getReturnRegister(Kind kind) {
+        return getReturnRegister(kind, Type.JavaCallee);
+    }
+
+    private static Register getReturnRegister(Kind kind, Type type) {
+        switch (kind) {
+            case Boolean:
+            case Byte:
+            case Char:
+            case Short:
+            case Int:
+            case Long:
+            case Object:
+                return type == Type.JavaCallee ? i0 : o0;
+            case Float:
+                return f0;
+            case Double:
+                return d0;
+            case Void:
+            case Illegal:
+                return null;
+            default:
+                throw new UnsupportedOperationException("no return register for type " + kind);
+        }
+    }
+
+    @Override
+    public Register getFrameRegister() {
+        return sp;
+    }
+
+    public CalleeSaveLayout getCalleeSaveLayout() {
+        return csl;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("Allocatable: " + Arrays.toString(getAllocatableRegisters()) + "%n" + "CallerSave:  " + Arrays.toString(getCallerSaveRegisters()) + "%n");
+    }
+}