--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.amd64/src/org/graalvm/compiler/hotspot/amd64/AMD64HotSpotLoweringProvider.java	Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2013, 2016, 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 org.graalvm.compiler.hotspot.amd64;
+
+import static org.graalvm.compiler.hotspot.HotSpotBackend.Options.GraalArithmeticStubs;
+import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotForeignCallsProvider.ARITHMETIC_COS_STUB;
+import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotForeignCallsProvider.ARITHMETIC_EXP_STUB;
+import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotForeignCallsProvider.ARITHMETIC_LOG10_STUB;
+import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotForeignCallsProvider.ARITHMETIC_LOG_STUB;
+import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotForeignCallsProvider.ARITHMETIC_SIN_STUB;
+import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotForeignCallsProvider.ARITHMETIC_POW_STUB;
+import static org.graalvm.compiler.hotspot.amd64.AMD64HotSpotForeignCallsProvider.ARITHMETIC_TAN_STUB;
+
+import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
+import org.graalvm.compiler.core.common.spi.ForeignCallsProvider;
+import org.graalvm.compiler.graph.Node;
+import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
+import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
+import org.graalvm.compiler.hotspot.meta.DefaultHotSpotLoweringProvider;
+import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
+import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider;
+import org.graalvm.compiler.hotspot.nodes.profiling.ProfileNode;
+import org.graalvm.compiler.hotspot.replacements.profiling.ProbabilisticProfileSnippets;
+import org.graalvm.compiler.nodes.calc.FloatConvertNode;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.replacements.amd64.AMD64ConvertSnippets;
+import org.graalvm.compiler.replacements.nodes.BinaryMathIntrinsicNode.BinaryOperation;
+import org.graalvm.compiler.replacements.nodes.UnaryMathIntrinsicNode.UnaryOperation;
+
+import jdk.vm.ci.code.TargetDescription;
+import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
+import jdk.vm.ci.meta.MetaAccessProvider;
+
+public class AMD64HotSpotLoweringProvider extends DefaultHotSpotLoweringProvider {
+
+    private AMD64ConvertSnippets.Templates convertSnippets;
+    private ProbabilisticProfileSnippets.Templates profileSnippets;
+
+    public AMD64HotSpotLoweringProvider(HotSpotGraalRuntimeProvider runtime, MetaAccessProvider metaAccess, ForeignCallsProvider foreignCalls, HotSpotRegistersProvider registers,
+                    HotSpotConstantReflectionProvider constantReflection, TargetDescription target) {
+        super(runtime, metaAccess, foreignCalls, registers, constantReflection, target);
+    }
+
+    @Override
+    public void initialize(HotSpotProviders providers, GraalHotSpotVMConfig config) {
+        convertSnippets = new AMD64ConvertSnippets.Templates(providers, providers.getSnippetReflection(), providers.getCodeCache().getTarget());
+        profileSnippets = ProfileNode.Options.ProbabilisticProfiling.getValue() ? new ProbabilisticProfileSnippets.Templates(providers, providers.getCodeCache().getTarget()) : null;
+        super.initialize(providers, config);
+    }
+
+    @Override
+    public void lower(Node n, LoweringTool tool) {
+        if (n instanceof FloatConvertNode) {
+            convertSnippets.lower((FloatConvertNode) n, tool);
+        } else if (profileSnippets != null && n instanceof ProfileNode) {
+            profileSnippets.lower((ProfileNode) n, tool);
+        } else {
+            super.lower(n, tool);
+        }
+    }
+
+    @Override
+    protected ForeignCallDescriptor toForeignCall(UnaryOperation operation) {
+        if (GraalArithmeticStubs.getValue()) {
+            switch (operation) {
+                case LOG:
+                    return ARITHMETIC_LOG_STUB;
+                case LOG10:
+                    return ARITHMETIC_LOG10_STUB;
+                case SIN:
+                    return ARITHMETIC_SIN_STUB;
+                case COS:
+                    return ARITHMETIC_COS_STUB;
+                case TAN:
+                    return ARITHMETIC_TAN_STUB;
+                case EXP:
+                    return ARITHMETIC_EXP_STUB;
+            }
+        } else if (operation == UnaryOperation.EXP) {
+            return operation.foreignCallDescriptor;
+        }
+        // Lower only using LIRGenerator
+        return null;
+    }
+
+    @Override
+    protected ForeignCallDescriptor toForeignCall(BinaryOperation operation) {
+        if (GraalArithmeticStubs.getValue()) {
+            switch (operation) {
+                case POW:
+                    return ARITHMETIC_POW_STUB;
+            }
+        } else if (operation == BinaryOperation.POW) {
+            return operation.foreignCallDescriptor;
+        }
+        // Lower only using LIRGenerator
+        return null;
+    }
+
+    @Override
+    public boolean supportSubwordCompare(int bits) {
+        return true;
+    }
+}