Add several classes from dx tool to the dexgen project

[android-x86/dalvik.git] / dexgen / src / com / android / dexgen / rop / code / ConservativeTranslationAdvice.java

diff --git a/dexgen/src/com/android/dexgen/rop/code/ConservativeTranslationAdvice.java b/dexgen/src/com/android/dexgen/rop/code/ConservativeTranslationAdvice.java
new file mode 100644 (file)
index 0000000..080432b
--- /dev/null
+++ b/dexgen/src/com/android/dexgen/rop/code/ConservativeTranslationAdvice.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.dexgen.rop.code;
+
+/**
+ * Implementation of {@link TranslationAdvice} which conservatively answers
+ * {@code false} to all methods.
+ */
+public final class ConservativeTranslationAdvice
+        implements TranslationAdvice {
+    /** {@code non-null;} standard instance of this class */
+    public static final ConservativeTranslationAdvice THE_ONE =
+        new ConservativeTranslationAdvice();
+
+    /**
+     * This class is not publicly instantiable. Use {@link #THE_ONE}.
+     */
+    private ConservativeTranslationAdvice() {
+        // This space intentionally left blank.
+    }
+
+    /** {@inheritDoc} */
+    public boolean hasConstantOperation(Rop opcode,
+            RegisterSpec sourceA, RegisterSpec sourceB) {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    public boolean requiresSourcesInOrder(Rop opcode,
+            RegisterSpecList sources) {
+        return false;
+    }
+
+    /** {@inheritDoc} */
+    public int getMaxOptimalRegisterCount() {
+        return Integer.MAX_VALUE;
+    }
+}