FileDocCategorySizeDatePackage
Form35c.javaAPI DocAndroid 1.5 API5963Wed May 06 22:41:02 BST 2009com.android.dx.dex.code.form

Form35c

public final class Form35c extends com.android.dx.dex.code.InsnFormat
Instruction format 35c. See the instruction format spec for details.

Fields Summary
public static final com.android.dx.dex.code.InsnFormat
THE_ONE
non-null; unique instance of this class
private static final int
MAX_NUM_OPS
Maximal number of operands
Constructors Summary
private Form35c()
Constructs an instance. This class is not publicly instantiable. Use {@link #THE_ONE}.


                     
      
        // This space intentionally left blank.
Methods Summary
public intcodeSize()
{@inheritDoc}

        return 3;
private static com.android.dx.rop.code.RegisterSpecListexplicitize(com.android.dx.rop.code.RegisterSpecList orig)
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 non-null; the original list
return
non-null; the list with the described transformation

        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;
public java.lang.StringinsnArgString(com.android.dx.dex.code.DalvInsn insn)
{@inheritDoc}

        RegisterSpecList regs = explicitize(insn.getRegisters());
        return regListString(regs) + ", " + cstString(insn);
public java.lang.StringinsnCommentString(com.android.dx.dex.code.DalvInsn insn, boolean noteIndices)
{@inheritDoc}

        if (noteIndices) {
            return cstComment(insn);
        } else {
            return "";
        }
public booleanisCompatible(com.android.dx.dex.code.DalvInsn insn)
{@inheritDoc}

        if (!(insn instanceof CstInsn)) {
            return false;
        }

        CstInsn ci = (CstInsn) insn;
        int cpi = ci.getIndex();

        if (! unsignedFitsInShort(cpi)) {
            return false;
        }

        Constant cst = ci.getConstant();
        if (!((cst instanceof CstMethodRef) ||
              (cst instanceof CstType))) {
            return false;
        }

        RegisterSpecList regs = ci.getRegisters();
        return (wordCount(regs) >= 0);
public com.android.dx.dex.code.InsnFormatnextUp()
{@inheritDoc}

        return Form3rc.THE_ONE;
private static intwordCount(com.android.dx.rop.code.RegisterSpecList regs)
Gets the number of words required for the given register list, where category-2 values count as two words. Return -1 if the list requires more than five words or contains registers that need more than a nibble to identify them.

param
regs non-null; the register list in question
return
>= -1; the number of words required, or -1 if the list couldn't possibly fit in this format

        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;
public voidwriteTo(com.android.dx.util.AnnotatedOutput out, com.android.dx.dex.code.DalvInsn insn)
{@inheritDoc}

        int cpi = ((CstInsn) insn).getIndex();
        RegisterSpecList regs = explicitize(insn.getRegisters());
        int sz = regs.size();
        int r0 = (sz > 0) ? regs.get(0).getReg() : 0;
        int r1 = (sz > 1) ? regs.get(1).getReg() : 0;
        int r2 = (sz > 2) ? regs.get(2).getReg() : 0;
        int r3 = (sz > 3) ? regs.get(3).getReg() : 0;
        int r4 = (sz > 4) ? regs.get(4).getReg() : 0;

        write(out,
              opcodeUnit(insn, 
                         makeByte(r4, sz)), // encode the fifth operand here
              (short) cpi,
              codeUnit(r0, r1, r2, r3));