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/*
* 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.dx.dex.code;
import com.android.dx.rop.code.Insn;
import com.android.dx.rop.code.RegOps;
import com.android.dx.rop.code.Rop;
import com.android.dx.rop.code.Rops;
import com.android.dx.rop.code.ThrowingCstInsn;
import com.android.dx.rop.code.RegisterSpec;
import com.android.dx.rop.cst.Constant;
import com.android.dx.rop.cst.CstFieldRef;
import com.android.dx.rop.cst.CstString;
import com.android.dx.rop.cst.CstType;
import com.android.dx.rop.type.Type;
import java.util.HashMap;
/**
* Translator from rop-level {@link Insn} instances to corresponding
* {@link Dop} instances.
*/
public final class RopToDop {
/** {@code non-null;} map from all the common rops to dalvik opcodes */
private static final HashMap<Rop, Dop> MAP;
/**
* This class is uninstantiable.
*/
private RopToDop() {
// This space intentionally left blank.
}
static {
/*
* Note: The choices made here are to pick the optimistically
* smallest Dalvik opcode, and leave it to later processing to
* pessimize.
*/
MAP = new HashMap<Rop, Dop>(400);
MAP.put(Rops.NOP, Dops.NOP);
MAP.put(Rops.MOVE_INT, Dops.MOVE);
MAP.put(Rops.MOVE_LONG, Dops.MOVE_WIDE);
MAP.put(Rops.MOVE_FLOAT, Dops.MOVE);
MAP.put(Rops.MOVE_DOUBLE, Dops.MOVE_WIDE);
MAP.put(Rops.MOVE_OBJECT, Dops.MOVE_OBJECT);
MAP.put(Rops.MOVE_PARAM_INT, Dops.MOVE);
MAP.put(Rops.MOVE_PARAM_LONG, Dops.MOVE_WIDE);
MAP.put(Rops.MOVE_PARAM_FLOAT, Dops.MOVE);
MAP.put(Rops.MOVE_PARAM_DOUBLE, Dops.MOVE_WIDE);
MAP.put(Rops.MOVE_PARAM_OBJECT, Dops.MOVE_OBJECT);
/*
* Note: No entry for MOVE_EXCEPTION, since it varies by
* exception type. (That is, there is no unique instance to
* add to the map.)
*/
MAP.put(Rops.CONST_INT, Dops.CONST_4);
MAP.put(Rops.CONST_LONG, Dops.CONST_WIDE_16);
MAP.put(Rops.CONST_FLOAT, Dops.CONST_4);
MAP.put(Rops.CONST_DOUBLE, Dops.CONST_WIDE_16);
/*
* Note: No entry for CONST_OBJECT, since it needs to turn
* into either CONST_STRING or CONST_CLASS.
*/
/*
* TODO: I think the only case of this is for null, and
* const/4 should cover that.
*/
MAP.put(Rops.CONST_OBJECT_NOTHROW, Dops.CONST_4);
MAP.put(Rops.GOTO, Dops.GOTO);
MAP.put(Rops.IF_EQZ_INT, Dops.IF_EQZ);
MAP.put(Rops.IF_NEZ_INT, Dops.IF_NEZ);
MAP.put(Rops.IF_LTZ_INT, Dops.IF_LTZ);
MAP.put(Rops.IF_GEZ_INT, Dops.IF_GEZ);
MAP.put(Rops.IF_LEZ_INT, Dops.IF_LEZ);
MAP.put(Rops.IF_GTZ_INT, Dops.IF_GTZ);
MAP.put(Rops.IF_EQZ_OBJECT, Dops.IF_EQZ);
MAP.put(Rops.IF_NEZ_OBJECT, Dops.IF_NEZ);
MAP.put(Rops.IF_EQ_INT, Dops.IF_EQ);
MAP.put(Rops.IF_NE_INT, Dops.IF_NE);
MAP.put(Rops.IF_LT_INT, Dops.IF_LT);
MAP.put(Rops.IF_GE_INT, Dops.IF_GE);
MAP.put(Rops.IF_LE_INT, Dops.IF_LE);
MAP.put(Rops.IF_GT_INT, Dops.IF_GT);
MAP.put(Rops.IF_EQ_OBJECT, Dops.IF_EQ);
MAP.put(Rops.IF_NE_OBJECT, Dops.IF_NE);
MAP.put(Rops.SWITCH, Dops.SPARSE_SWITCH);
MAP.put(Rops.ADD_INT, Dops.ADD_INT_2ADDR);
MAP.put(Rops.ADD_LONG, Dops.ADD_LONG_2ADDR);
MAP.put(Rops.ADD_FLOAT, Dops.ADD_FLOAT_2ADDR);
MAP.put(Rops.ADD_DOUBLE, Dops.ADD_DOUBLE_2ADDR);
MAP.put(Rops.SUB_INT, Dops.SUB_INT_2ADDR);
MAP.put(Rops.SUB_LONG, Dops.SUB_LONG_2ADDR);
MAP.put(Rops.SUB_FLOAT, Dops.SUB_FLOAT_2ADDR);
MAP.put(Rops.SUB_DOUBLE, Dops.SUB_DOUBLE_2ADDR);
MAP.put(Rops.MUL_INT, Dops.MUL_INT_2ADDR);
MAP.put(Rops.MUL_LONG, Dops.MUL_LONG_2ADDR);
MAP.put(Rops.MUL_FLOAT, Dops.MUL_FLOAT_2ADDR);
MAP.put(Rops.MUL_DOUBLE, Dops.MUL_DOUBLE_2ADDR);
MAP.put(Rops.DIV_INT, Dops.DIV_INT_2ADDR);
MAP.put(Rops.DIV_LONG, Dops.DIV_LONG_2ADDR);
MAP.put(Rops.DIV_FLOAT, Dops.DIV_FLOAT_2ADDR);
MAP.put(Rops.DIV_DOUBLE, Dops.DIV_DOUBLE_2ADDR);
MAP.put(Rops.REM_INT, Dops.REM_INT_2ADDR);
MAP.put(Rops.REM_LONG, Dops.REM_LONG_2ADDR);
MAP.put(Rops.REM_FLOAT, Dops.REM_FLOAT_2ADDR);
MAP.put(Rops.REM_DOUBLE, Dops.REM_DOUBLE_2ADDR);
MAP.put(Rops.NEG_INT, Dops.NEG_INT);
MAP.put(Rops.NEG_LONG, Dops.NEG_LONG);
MAP.put(Rops.NEG_FLOAT, Dops.NEG_FLOAT);
MAP.put(Rops.NEG_DOUBLE, Dops.NEG_DOUBLE);
MAP.put(Rops.AND_INT, Dops.AND_INT_2ADDR);
MAP.put(Rops.AND_LONG, Dops.AND_LONG_2ADDR);
MAP.put(Rops.OR_INT, Dops.OR_INT_2ADDR);
MAP.put(Rops.OR_LONG, Dops.OR_LONG_2ADDR);
MAP.put(Rops.XOR_INT, Dops.XOR_INT_2ADDR);
MAP.put(Rops.XOR_LONG, Dops.XOR_LONG_2ADDR);
MAP.put(Rops.SHL_INT, Dops.SHL_INT_2ADDR);
MAP.put(Rops.SHL_LONG, Dops.SHL_LONG_2ADDR);
MAP.put(Rops.SHR_INT, Dops.SHR_INT_2ADDR);
MAP.put(Rops.SHR_LONG, Dops.SHR_LONG_2ADDR);
MAP.put(Rops.USHR_INT, Dops.USHR_INT_2ADDR);
MAP.put(Rops.USHR_LONG, Dops.USHR_LONG_2ADDR);
MAP.put(Rops.NOT_INT, Dops.NOT_INT);
MAP.put(Rops.NOT_LONG, Dops.NOT_LONG);
MAP.put(Rops.ADD_CONST_INT, Dops.ADD_INT_LIT8);
// Note: No dalvik ops for other types of add_const.
/*
* Note: No dalvik ops for any type of sub_const; there's a
* *reverse* sub (constant - reg) for ints, though, but that
* should end up getting handled at optimization time.
*/
MAP.put(Rops.MUL_CONST_INT, Dops.MUL_INT_LIT8);
// Note: No dalvik ops for other types of mul_const.
MAP.put(Rops.DIV_CONST_INT, Dops.DIV_INT_LIT8);
// Note: No dalvik ops for other types of div_const.
MAP.put(Rops.REM_CONST_INT, Dops.REM_INT_LIT8);
// Note: No dalvik ops for other types of rem_const.
MAP.put(Rops.AND_CONST_INT, Dops.AND_INT_LIT8);
// Note: No dalvik op for and_const_long.
MAP.put(Rops.OR_CONST_INT, Dops.OR_INT_LIT8);
// Note: No dalvik op for or_const_long.
MAP.put(Rops.XOR_CONST_INT, Dops.XOR_INT_LIT8);
// Note: No dalvik op for xor_const_long.
MAP.put(Rops.SHL_CONST_INT, Dops.SHL_INT_LIT8);
// Note: No dalvik op for shl_const_long.
MAP.put(Rops.SHR_CONST_INT, Dops.SHR_INT_LIT8);
// Note: No dalvik op for shr_const_long.
MAP.put(Rops.USHR_CONST_INT, Dops.USHR_INT_LIT8);
// Note: No dalvik op for shr_const_long.
MAP.put(Rops.CMPL_LONG, Dops.CMP_LONG);
MAP.put(Rops.CMPL_FLOAT, Dops.CMPL_FLOAT);
MAP.put(Rops.CMPL_DOUBLE, Dops.CMPL_DOUBLE);
MAP.put(Rops.CMPG_FLOAT, Dops.CMPG_FLOAT);
MAP.put(Rops.CMPG_DOUBLE, Dops.CMPG_DOUBLE);
MAP.put(Rops.CONV_L2I, Dops.LONG_TO_INT);
MAP.put(Rops.CONV_F2I, Dops.FLOAT_TO_INT);
MAP.put(Rops.CONV_D2I, Dops.DOUBLE_TO_INT);
MAP.put(Rops.CONV_I2L, Dops.INT_TO_LONG);
MAP.put(Rops.CONV_F2L, Dops.FLOAT_TO_LONG);
MAP.put(Rops.CONV_D2L, Dops.DOUBLE_TO_LONG);
MAP.put(Rops.CONV_I2F, Dops.INT_TO_FLOAT);
MAP.put(Rops.CONV_L2F, Dops.LONG_TO_FLOAT);
MAP.put(Rops.CONV_D2F, Dops.DOUBLE_TO_FLOAT);
MAP.put(Rops.CONV_I2D, Dops.INT_TO_DOUBLE);
MAP.put(Rops.CONV_L2D, Dops.LONG_TO_DOUBLE);
MAP.put(Rops.CONV_F2D, Dops.FLOAT_TO_DOUBLE);
MAP.put(Rops.TO_BYTE, Dops.INT_TO_BYTE);
MAP.put(Rops.TO_CHAR, Dops.INT_TO_CHAR);
MAP.put(Rops.TO_SHORT, Dops.INT_TO_SHORT);
MAP.put(Rops.RETURN_VOID, Dops.RETURN_VOID);
MAP.put(Rops.RETURN_INT, Dops.RETURN);
MAP.put(Rops.RETURN_LONG, Dops.RETURN_WIDE);
MAP.put(Rops.RETURN_FLOAT, Dops.RETURN);
MAP.put(Rops.RETURN_DOUBLE, Dops.RETURN_WIDE);
MAP.put(Rops.RETURN_OBJECT, Dops.RETURN_OBJECT);
MAP.put(Rops.ARRAY_LENGTH, Dops.ARRAY_LENGTH);
MAP.put(Rops.THROW, Dops.THROW);
MAP.put(Rops.MONITOR_ENTER, Dops.MONITOR_ENTER);
MAP.put(Rops.MONITOR_EXIT, Dops.MONITOR_EXIT);
MAP.put(Rops.AGET_INT, Dops.AGET);
MAP.put(Rops.AGET_LONG, Dops.AGET_WIDE);
MAP.put(Rops.AGET_FLOAT, Dops.AGET);
MAP.put(Rops.AGET_DOUBLE, Dops.AGET_WIDE);
MAP.put(Rops.AGET_OBJECT, Dops.AGET_OBJECT);
MAP.put(Rops.AGET_BOOLEAN, Dops.AGET_BOOLEAN);
MAP.put(Rops.AGET_BYTE, Dops.AGET_BYTE);
MAP.put(Rops.AGET_CHAR, Dops.AGET_CHAR);
MAP.put(Rops.AGET_SHORT, Dops.AGET_SHORT);
MAP.put(Rops.APUT_INT, Dops.APUT);
MAP.put(Rops.APUT_LONG, Dops.APUT_WIDE);
MAP.put(Rops.APUT_FLOAT, Dops.APUT);
MAP.put(Rops.APUT_DOUBLE, Dops.APUT_WIDE);
MAP.put(Rops.APUT_OBJECT, Dops.APUT_OBJECT);
MAP.put(Rops.APUT_BOOLEAN, Dops.APUT_BOOLEAN);
MAP.put(Rops.APUT_BYTE, Dops.APUT_BYTE);
MAP.put(Rops.APUT_CHAR, Dops.APUT_CHAR);
MAP.put(Rops.APUT_SHORT, Dops.APUT_SHORT);
MAP.put(Rops.NEW_INSTANCE, Dops.NEW_INSTANCE);
MAP.put(Rops.CHECK_CAST, Dops.CHECK_CAST);
MAP.put(Rops.INSTANCE_OF, Dops.INSTANCE_OF);
MAP.put(Rops.GET_FIELD_LONG, Dops.IGET_WIDE);
MAP.put(Rops.GET_FIELD_FLOAT, Dops.IGET);
MAP.put(Rops.GET_FIELD_DOUBLE, Dops.IGET_WIDE);
MAP.put(Rops.GET_FIELD_OBJECT, Dops.IGET_OBJECT);
/*
* Note: No map entries for get_field_* for non-long integral types,
* since they need to be handled specially (see dopFor() below).
*/
MAP.put(Rops.GET_STATIC_LONG, Dops.SGET_WIDE);
MAP.put(Rops.GET_STATIC_FLOAT, Dops.SGET);
MAP.put(Rops.GET_STATIC_DOUBLE, Dops.SGET_WIDE);
MAP.put(Rops.GET_STATIC_OBJECT, Dops.SGET_OBJECT);
/*
* Note: No map entries for get_static* for non-long integral types,
* since they need to be handled specially (see dopFor() below).
*/
MAP.put(Rops.PUT_FIELD_LONG, Dops.IPUT_WIDE);
MAP.put(Rops.PUT_FIELD_FLOAT, Dops.IPUT);
MAP.put(Rops.PUT_FIELD_DOUBLE, Dops.IPUT_WIDE);
MAP.put(Rops.PUT_FIELD_OBJECT, Dops.IPUT_OBJECT);
/*
* Note: No map entries for put_field_* for non-long integral types,
* since they need to be handled specially (see dopFor() below).
*/
MAP.put(Rops.PUT_STATIC_LONG, Dops.SPUT_WIDE);
MAP.put(Rops.PUT_STATIC_FLOAT, Dops.SPUT);
MAP.put(Rops.PUT_STATIC_DOUBLE, Dops.SPUT_WIDE);
MAP.put(Rops.PUT_STATIC_OBJECT, Dops.SPUT_OBJECT);
/*
* Note: No map entries for put_static* for non-long integral types,
* since they need to be handled specially (see dopFor() below).
*/
/*
* Note: No map entries for invoke*, new_array, and
* filled_new_array, since they need to be handled specially
* (see dopFor() below).
*/
}
/**
* Returns the dalvik opcode appropriate for the given register-based
* instruction.
*
* @param insn {@code non-null;} the original instruction
* @return the corresponding dalvik opcode; one of the constants in
* {@link Dops}
*/
public static Dop dopFor(Insn insn) {
Rop rop = insn.getOpcode();
/*
* First, just try looking up the rop in the MAP of easy
* cases.
*/
Dop result = MAP.get(rop);
if (result != null) {
return result;
}
/*
* There was no easy case for the rop, so look up the opcode, and
* do something special for each:
*
* The move_exception, new_array, filled_new_array, and
* invoke* opcodes won't be found in MAP, since they'll each
* have different source and/or result register types / lists.
*
* The get* and put* opcodes for (non-long) integral types
* aren't in the map, since the type signatures aren't
* sufficient to distinguish between the types (the salient
* source or result will always be just "int").
*
* And const instruction need to distinguish between strings and
* classes.
*/
switch (rop.getOpcode()) {
case RegOps.MOVE_EXCEPTION: return Dops.MOVE_EXCEPTION;
case RegOps.INVOKE_STATIC: return Dops.INVOKE_STATIC;
case RegOps.INVOKE_VIRTUAL: return Dops.INVOKE_VIRTUAL;
case RegOps.INVOKE_SUPER: return Dops.INVOKE_SUPER;
case RegOps.INVOKE_DIRECT: return Dops.INVOKE_DIRECT;
case RegOps.INVOKE_INTERFACE: return Dops.INVOKE_INTERFACE;
case RegOps.NEW_ARRAY: return Dops.NEW_ARRAY;
case RegOps.FILLED_NEW_ARRAY: return Dops.FILLED_NEW_ARRAY;
case RegOps.FILL_ARRAY_DATA: return Dops.FILL_ARRAY_DATA;
case RegOps.MOVE_RESULT: {
RegisterSpec resultReg = insn.getResult();
if (resultReg == null) {
return Dops.NOP;
} else {
switch (resultReg.getBasicType()) {
case Type.BT_INT:
case Type.BT_FLOAT:
case Type.BT_BOOLEAN:
case Type.BT_BYTE:
case Type.BT_CHAR:
case Type.BT_SHORT:
return Dops.MOVE_RESULT;
case Type.BT_LONG:
case Type.BT_DOUBLE:
return Dops.MOVE_RESULT_WIDE;
case Type.BT_OBJECT:
return Dops.MOVE_RESULT_OBJECT;
default: {
throw new RuntimeException("Unexpected basic type");
}
}
}
}
case RegOps.GET_FIELD: {
CstFieldRef ref =
(CstFieldRef) ((ThrowingCstInsn) insn).getConstant();
int basicType = ref.getBasicType();
switch (basicType) {
case Type.BT_BOOLEAN: return Dops.IGET_BOOLEAN;
case Type.BT_BYTE: return Dops.IGET_BYTE;
case Type.BT_CHAR: return Dops.IGET_CHAR;
case Type.BT_SHORT: return Dops.IGET_SHORT;
case Type.BT_INT: return Dops.IGET;
}
break;
}
case RegOps.PUT_FIELD: {
CstFieldRef ref =
(CstFieldRef) ((ThrowingCstInsn) insn).getConstant();
int basicType = ref.getBasicType();
switch (basicType) {
case Type.BT_BOOLEAN: return Dops.IPUT_BOOLEAN;
case Type.BT_BYTE: return Dops.IPUT_BYTE;
case Type.BT_CHAR: return Dops.IPUT_CHAR;
case Type.BT_SHORT: return Dops.IPUT_SHORT;
case Type.BT_INT: return Dops.IPUT;
}
break;
}
case RegOps.GET_STATIC: {
CstFieldRef ref =
(CstFieldRef) ((ThrowingCstInsn) insn).getConstant();
int basicType = ref.getBasicType();
switch (basicType) {
case Type.BT_BOOLEAN: return Dops.SGET_BOOLEAN;
case Type.BT_BYTE: return Dops.SGET_BYTE;
case Type.BT_CHAR: return Dops.SGET_CHAR;
case Type.BT_SHORT: return Dops.SGET_SHORT;
case Type.BT_INT: return Dops.SGET;
}
break;
}
case RegOps.PUT_STATIC: {
CstFieldRef ref =
(CstFieldRef) ((ThrowingCstInsn) insn).getConstant();
int basicType = ref.getBasicType();
switch (basicType) {
case Type.BT_BOOLEAN: return Dops.SPUT_BOOLEAN;
case Type.BT_BYTE: return Dops.SPUT_BYTE;
case Type.BT_CHAR: return Dops.SPUT_CHAR;
case Type.BT_SHORT: return Dops.SPUT_SHORT;
case Type.BT_INT: return Dops.SPUT;
}
break;
}
case RegOps.CONST: {
Constant cst = ((ThrowingCstInsn) insn).getConstant();
if (cst instanceof CstType) {
return Dops.CONST_CLASS;
} else if (cst instanceof CstString) {
return Dops.CONST_STRING;
}
break;
}
}
throw new RuntimeException("unknown rop: " + rop);
}
}
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