Add several classes from dx tool to the dexgen project

[android-x86/dalvik.git] / dexgen / src / com / android / dexgen / dex / code / form / Form31c.java

diff --git a/dexgen/src/com/android/dexgen/dex/code/form/Form31c.java b/dexgen/src/com/android/dexgen/dex/code/form/Form31c.java
new file mode 100644 (file)
index 0000000..c87a451
--- /dev/null
+++ b/dexgen/src/com/android/dexgen/dex/code/form/Form31c.java
@@ -0,0 +1,129 @@
+/*
+ * 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.dex.code.form;
+
+import com.android.dexgen.dex.code.CstInsn;
+import com.android.dexgen.dex.code.DalvInsn;
+import com.android.dexgen.dex.code.InsnFormat;
+import com.android.dexgen.rop.code.RegisterSpec;
+import com.android.dexgen.rop.code.RegisterSpecList;
+import com.android.dexgen.rop.cst.Constant;
+import com.android.dexgen.rop.cst.CstFieldRef;
+import com.android.dexgen.rop.cst.CstString;
+import com.android.dexgen.rop.cst.CstType;
+import com.android.dexgen.util.AnnotatedOutput;
+
+/**
+ * Instruction format {@code 31c}. See the instruction format spec
+ * for details.
+ */
+public final class Form31c extends InsnFormat {
+    /** {@code non-null;} unique instance of this class */
+    public static final InsnFormat THE_ONE = new Form31c();
+
+    /**
+     * Constructs an instance. This class is not publicly
+     * instantiable. Use {@link #THE_ONE}.
+     */
+    private Form31c() {
+        // This space intentionally left blank.
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String insnArgString(DalvInsn insn) {
+        RegisterSpecList regs = insn.getRegisters();
+        return regs.get(0).regString() + ", " + cstString(insn);
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String insnCommentString(DalvInsn insn, boolean noteIndices) {
+        if (noteIndices) {
+            return cstComment(insn);
+        } else {
+            return "";
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public int codeSize() {
+        return 3;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public boolean isCompatible(DalvInsn insn) {
+        if (!(insn instanceof CstInsn)) {
+            return false;
+        }
+
+        RegisterSpecList regs = insn.getRegisters();
+        RegisterSpec reg;
+
+        switch (regs.size()) {
+            case 1: {
+                reg = regs.get(0);
+                break;
+            }
+            case 2: {
+                /*
+                 * This format is allowed for ops that are effectively
+                 * 2-arg but where the two args are identical.
+                 */
+                reg = regs.get(0);
+                if (reg.getReg() != regs.get(1).getReg()) {
+                    return false;
+                }
+                break;
+            }
+            default: {
+                return false;
+            }
+        }
+
+        if (!unsignedFitsInByte(reg.getReg())) {
+            return false;
+        }
+
+        CstInsn ci = (CstInsn) insn;
+        Constant cst = ci.getConstant();
+
+        return ((cst instanceof CstType) ||
+                (cst instanceof CstFieldRef) ||
+                (cst instanceof CstString));
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public InsnFormat nextUp() {
+        return null;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public void writeTo(AnnotatedOutput out, DalvInsn insn) {
+        RegisterSpecList regs = insn.getRegisters();
+        int cpi = ((CstInsn) insn).getIndex();
+
+        write(out,
+                opcodeUnit(insn, regs.get(0).getReg()),
+                (short) cpi,
+                (short) (cpi >> 16));
+    }
+}