SVM_SELECTOR_DB_SHIFT
#define SVM_SELECTOR_DB_MASK (1 << SVM_SELECTOR_DB_SHIFT)
var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
#define SVM_SELECTOR_DB_MASK (1 << SVM_SELECTOR_DB_SHIFT)