--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.asm.amd64.test/src/com/oracle/jvmci/asm/amd64/test/IncrementDecrementMacroTest.java	Wed Jun 03 18:33:23 2015 +0200
@@ -0,0 +1,228 @@
+/*
+ * Copyright (c) 2015, 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 com.oracle.jvmci.asm.amd64.test;
+
+import com.oracle.jvmci.amd64.*;
+import com.oracle.jvmci.asm.amd64.*;
+import com.oracle.jvmci.asm.test.*;
+import com.oracle.jvmci.code.RegisterConfig;
+import com.oracle.jvmci.code.TargetDescription;
+import com.oracle.jvmci.code.Register;
+import com.oracle.jvmci.code.CallingConvention;
+import com.oracle.jvmci.code.CompilationResult;
+import com.oracle.jvmci.meta.Kind;
+
+import static com.oracle.jvmci.code.ValueUtil.*;
+import static com.oracle.jvmci.common.UnsafeAccess.*;
+import static org.junit.Assume.*;
+
+import java.lang.reflect.*;
+
+import org.junit.*;
+
+public class IncrementDecrementMacroTest extends AssemblerTest {
+
+    @Before
+    public void checkAMD64() {
+        assumeTrue("skipping AMD64 specific test", codeCache.getTarget().arch instanceof AMD64);
+    }
+
+    public static class LongField {
+        public long x;
+
+        LongField(long x) {
+            this.x = x;
+        }
+    }
+
+    private static class IncrementCodeGenTest implements CodeGenTest {
+        final int value;
+
+        public IncrementCodeGenTest(int value) {
+            this.value = value;
+        }
+
+        @Override
+        public byte[] generateCode(CompilationResult compResult, TargetDescription target, RegisterConfig registerConfig, CallingConvention cc) {
+            AMD64MacroAssembler asm = new AMD64MacroAssembler(target, registerConfig);
+            Register ret = registerConfig.getReturnRegister(Kind.Int);
+            try {
+                Field f = LongField.class.getDeclaredField("x");
+                AMD64Address arg = new AMD64Address(asRegister(cc.getArgument(0)), (int) unsafe.objectFieldOffset(f));
+                asm.incrementq(arg, value);
+                asm.movq(ret, arg);
+                asm.ret(0);
+                return asm.close(true);
+            } catch (Exception e) {
+                throw new RuntimeException("exception while trying to generate field access:", e);
+            }
+        }
+    }
+
+    private void assertIncrement(long initValue, int increment) {
+        assertReturn("longFieldStubIncrement", new IncrementCodeGenTest(increment), initValue + increment, new LongField(initValue));
+    }
+
+    private void assertIncrements(int increment) {
+        assertIncrement(0x4242_4242_4242_4242L, increment);
+    }
+
+    @SuppressWarnings("unused")
+    public static long longFieldStubIncrement(LongField arg) {
+        return 0;
+    }
+
+    private static class DecrementCodeGenTest implements CodeGenTest {
+        final int value;
+
+        public DecrementCodeGenTest(int value) {
+            this.value = value;
+        }
+
+        @Override
+        public byte[] generateCode(CompilationResult compResult, TargetDescription target, RegisterConfig registerConfig, CallingConvention cc) {
+            AMD64MacroAssembler asm = new AMD64MacroAssembler(target, registerConfig);
+            Register ret = registerConfig.getReturnRegister(Kind.Int);
+            try {
+                Field f = LongField.class.getDeclaredField("x");
+                AMD64Address arg = new AMD64Address(asRegister(cc.getArgument(0)), (int) unsafe.objectFieldOffset(f));
+                asm.decrementq(arg, value);
+                asm.movq(ret, arg);
+                asm.ret(0);
+                return asm.close(true);
+            } catch (Exception e) {
+                throw new RuntimeException("exception while trying to generate field access:", e);
+            }
+        }
+    }
+
+    private void assertDecrement(long initValue, int increment) {
+        assertReturn("longFieldStubDecrement", new DecrementCodeGenTest(increment), initValue - increment, new LongField(initValue));
+    }
+
+    private void assertDecrements(int increment) {
+        assertDecrement(0x4242_4242_4242_4242L, increment);
+    }
+
+    @SuppressWarnings("unused")
+    public static long longFieldStubDecrement(LongField arg) {
+        return 0;
+    }
+
+    @Test
+    public void incrementMemTest0() {
+        int increment = 0;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void incrementMemTest1() {
+        int increment = 1;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void incrementMemTest2() {
+        int increment = 2;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void incrementMemTest3() {
+        int increment = Integer.MAX_VALUE;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void incrementMemTest4() {
+        int increment = Integer.MIN_VALUE;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void incrementMemTest5() {
+        int increment = -1;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void incrementMemTest6() {
+        int increment = -2;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void incrementMemTest7() {
+        int increment = -0x1000_0000;
+        assertIncrements(increment);
+    }
+
+    @Test
+    public void decrementMemTest0() {
+        int decrement = 0;
+        assertDecrements(decrement);
+    }
+
+    @Test
+    public void decrementMemTest1() {
+        int decrement = 1;
+        assertDecrements(decrement);
+    }
+
+    @Test
+    public void decrementMemTest2() {
+        int decrement = 2;
+        assertDecrements(decrement);
+    }
+
+    @Test
+    public void decrementMemTest3() {
+        int decrement = Integer.MAX_VALUE;
+        assertDecrements(decrement);
+    }
+
+    @Test
+    public void decrementMemTest4() {
+        int decrement = Integer.MIN_VALUE;
+        assertDecrements(decrement);
+    }
+
+    @Test
+    public void decrementMemTest5() {
+        int decrement = -1;
+        assertDecrements(decrement);
+    }
+
+    @Test
+    public void decrementMemTest6() {
+        int decrement = -2;
+        assertDecrements(decrement);
+    }
+
+    @Test
+    public void decrementMemTest7() {
+        int decrement = -0x1000_0000;
+        assertDecrements(decrement);
+    }
+
+}