Examples with RegisterSpec com.android.dx.rop.code.RegisterSpec used on opensource projects

Example 1 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class RopToDop method dopFor.

/**
     * 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;
    }
    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);
}

Example 2 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class Form35c method wordCount.

/**
     * Gets the number of words required for the given register list, where
     * category-2 values count as two words. Return {@code -1} if the
     * list requires more than five words or contains registers that need
     * more than a nibble to identify them.
     *
     * @param regs {@code non-null;} the register list in question
     * @return {@code >= -1;} the number of words required, or {@code -1}
     * if the list couldn't possibly fit in this format
     */
private static int wordCount(RegisterSpecList regs) {
    int sz = regs.size();
    if (sz > MAX_NUM_OPS) {
        // It can't possibly fit.
        return -1;
    }
    int result = 0;
    for (int i = 0; i < sz; i++) {
        RegisterSpec one = regs.get(i);
        result += one.getCategory();
        /*
             * The check below adds (category - 1) to the register, to
             * account for the fact that the second half of a
             * category-2 register has to be represented explicitly in
             * the result.
             */
        if (!unsignedFitsInNibble(one.getReg() + one.getCategory() - 1)) {
            return -1;
        }
    }
    return (result <= MAX_NUM_OPS) ? result : -1;
}

Example 3 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class Form35c method explicitize.

/**
     * Returns a register list which is equivalent to the given one,
     * except that it splits category-2 registers into two explicit
     * entries. This returns the original list if no modification is
     * required
     *
     * @param orig {@code non-null;} the original list
     * @return {@code non-null;} the list with the described transformation
     */
private static RegisterSpecList explicitize(RegisterSpecList orig) {
    int wordCount = wordCount(orig);
    int sz = orig.size();
    if (wordCount == sz) {
        return orig;
    }
    RegisterSpecList result = new RegisterSpecList(wordCount);
    int wordAt = 0;
    for (int i = 0; i < sz; i++) {
        RegisterSpec one = orig.get(i);
        result.set(wordAt, one);
        if (one.getCategory() == 2) {
            result.set(wordAt + 1, RegisterSpec.make(one.getReg() + 1, Type.VOID));
            wordAt += 2;
        } else {
            wordAt++;
        }
    }
    result.setImmutable();
    return result;
}

Example 4 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class HighRegisterPrefix method listingString0.

/** {@inheritDoc} */
@Override
protected String listingString0(boolean noteIndices) {
    RegisterSpecList registers = getRegisters();
    int sz = registers.size();
    StringBuffer sb = new StringBuffer(100);
    for (int i = 0, outAt = 0; i < sz; i++) {
        RegisterSpec src = registers.get(i);
        SimpleInsn insn = moveInsnFor(src, outAt);
        if (i != 0) {
            sb.append('\n');
        }
        sb.append(insn.listingString0(noteIndices));
        outAt += src.getCategory();
    }
    return sb.toString();
}

Example 5 with RegisterSpec

use of com.android.dx.rop.code.RegisterSpec in project buck by facebook.

the class InsnFormat method isRegListSequential.

/**
     * Helper method to determine if a list of registers are sequential,
     * including degenerate cases for empty or single-element lists.
     *
     * @param list {@code non-null;} the list of registers
     * @return {@code true} iff the list is sequentially ordered
     */
protected static boolean isRegListSequential(RegisterSpecList list) {
    int sz = list.size();
    if (sz < 2) {
        return true;
    }
    int first = list.get(0).getReg();
    int next = first;
    for (int i = 0; i < sz; i++) {
        RegisterSpec one = list.get(i);
        if (one.getReg() != next) {
            return false;
        }
        next += one.getCategory();
    }
    return true;
}