bitstr_t
register bitstr_t *_name = (name); \
bitstr_t _lb; \
register bitstr_t *_name = (name); \
bitstr_t _lb; \
(bitstr_t *)calloc((size_t)bitstr_size(nbits), sizeof(bitstr_t))
register bitstr_t *_name = (name); \
register bitstr_t *_name = (name); \