diff options
Diffstat (limited to 'dx/src/com/android/dx/dex/code/form/Form41c.java')
-rw-r--r-- | dx/src/com/android/dx/dex/code/form/Form41c.java | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/dx/src/com/android/dx/dex/code/form/Form41c.java b/dx/src/com/android/dx/dex/code/form/Form41c.java new file mode 100644 index 0000000..24067bc --- /dev/null +++ b/dx/src/com/android/dx/dex/code/form/Form41c.java @@ -0,0 +1,144 @@ +/* + * Copyright (C) 2010 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.dx.dex.code.form; + +import com.android.dx.dex.code.CstInsn; +import com.android.dx.dex.code.DalvInsn; +import com.android.dx.dex.code.InsnFormat; +import com.android.dx.rop.code.RegisterSpec; +import com.android.dx.rop.code.RegisterSpecList; +import com.android.dx.rop.cst.Constant; +import com.android.dx.rop.cst.CstFieldRef; +import com.android.dx.rop.cst.CstType; +import com.android.dx.util.AnnotatedOutput; + +import java.util.BitSet; + +/** + * Instruction format {@code 41c}. See the instruction format spec + * for details. + */ +public final class Form41c extends InsnFormat { + /** {@code non-null;} unique instance of this class */ + public static final InsnFormat THE_ONE = new Form41c(); + + /** + * Constructs an instance. This class is not publicly + * instantiable. Use {@link #THE_ONE}. + */ + private Form41c() { + // 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 4; + } + + /** {@inheritDoc} */ + @Override + public boolean isCompatible(DalvInsn insn) { + if (! ALLOW_EXTENDED_OPCODES) { + return false; + } + + 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 (!unsignedFitsInShort(reg.getReg())) { + return false; + } + + CstInsn ci = (CstInsn) insn; + Constant cst = ci.getConstant(); + + return (cst instanceof CstType) || + (cst instanceof CstFieldRef); + } + + /** {@inheritDoc} */ + @Override + public BitSet compatibleRegs(DalvInsn insn) { + RegisterSpecList regs = insn.getRegisters(); + int sz = regs.size(); + BitSet bits = new BitSet(sz); + boolean compat = unsignedFitsInByte(regs.get(0).getReg()); + + if (sz == 1) { + bits.set(0, compat); + } else { + if (regs.get(0).getReg() == regs.get(1).getReg()) { + bits.set(0, compat); + bits.set(1, compat); + } + } + + return bits; + } + + /** {@inheritDoc} */ + @Override + public void writeTo(AnnotatedOutput out, DalvInsn insn) { + RegisterSpecList regs = insn.getRegisters(); + int cpi = ((CstInsn) insn).getIndex(); + + write(out, opcodeUnit(insn), cpi, (short) regs.get(0).getReg()); + } +} |