vstack.push(IntItem.createConst((short) v.getValue()));
vstack.push(ifac.createIConst((short) v.getValue()));
    public final void visit_i2s() {        final IntItem v = vstack.popInt();        if (v.isConstant()) {            vstack.push(IntItem.createConst((short) v.getValue()));        } else {            v.load(eContext);            final Register r = v.getRegister();            os.writeMOVSX(r, r, WORDSIZE);            vstack.push(v);        }    }