/** {@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);
}
/** {@inheritDoc} */
@Override
public void writeTo(AnnotatedOutput out, DalvInsn insn) {
RegisterSpecList regs = insn.getRegisters();
int offset = ((TargetInsn) insn).getTargetOffset();
write(out, opcodeUnit(insn, regs.get(0).getReg()), (short) offset, (short) (offset >> 16));
}
/** {@inheritDoc} */
@Override
public boolean isCompatible(DalvInsn insn) {
RegisterSpecList regs = insn.getRegisters();
return (insn instanceof TargetInsn)
&& (regs.size() == 1)
&& unsignedFitsInByte(regs.get(0).getReg());
}
/** {@inheritDoc} */
@Override
public boolean isCompatible(DalvInsn insn) {
if (!((insn instanceof TargetInsn) && (insn.getRegisters().size() == 0))) {
return false;
}
TargetInsn ti = (TargetInsn) insn;
return ti.hasTargetOffset() ? branchFits(ti) : true;
}
/** {@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;
int cpi = ci.getIndex();
if (!unsignedFitsInShort(cpi)) {
return false;
}
Constant cst = ci.getConstant();
return (cst instanceof CstType) || (cst instanceof CstFieldRef) || (cst instanceof CstString);
}
/** {@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 String insnArgString(DalvInsn insn) {
RegisterSpecList regs = insn.getRegisters();
return regs.get(0).regString() + ", " + cstString(insn);
}