INVALID_FIELD
*src_field = INVALID_FIELD;
u16 prev_src_field = INVALID_FIELD, prev_dst_field = INVALID_FIELD;
u16 src_field = INVALID_FIELD;
u16 dst_field = INVALID_FIELD;
(dst_field != INVALID_FIELD ||
prev_dst_field != INVALID_FIELD) &&
C(INVALID_FIELD, "Invalid field"), \