diff options
Diffstat (limited to 'src/pcu_utils.h')
| -rw-r--r-- | src/pcu_utils.h | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/src/pcu_utils.h b/src/pcu_utils.h index e1a8572a..540f7049 100644 --- a/src/pcu_utils.h +++ b/src/pcu_utils.h @@ -10,10 +10,6 @@ * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #pragma once #ifdef __cplusplus @@ -71,23 +67,25 @@ static inline unsigned fn_next_block(unsigned fn) return fn % GSM_MAX_FN; } -#ifdef __cplusplus -template <typename T> -inline unsigned int pcu_bitcount(T x) +inline unsigned int pcu_bitcount(unsigned long long x) { - unsigned int count = 0; - for (count = 0; x; count += 1) - x &= x - 1; - - return count; + return __builtin_popcountll(x); } -#endif +/* Trim all 1 bits except the Least Significat Bit, which is kept. + * equivalent of (1 << ffs(u)) / 2 + */ static inline uint8_t pcu_lsb(uint8_t x) { return x & -x; } +#define RFN_MODULUS 42432 +static inline uint16_t fn2rfn(uint32_t fn) +{ + return fn % RFN_MODULUS; +} + /* Used to store a C++ class in a llist used by C code */ struct llist_item { struct llist_head list; /* item used by llist */ |