offset= -1;
  OPT_DoubleConstantOperand(double v) {    value = v;    offset= -1;    if (v == 0.) {       offset = VM_Entrypoints.zeroDoubleField.getOffset() >> 2;    } else if (v == 1.) {       offset = VM_Entrypoints.oneDoubleField.getOffset() >> 2;    }  }