laforge has submitted this change. ( https://gerrit.osmocom.org/c/osmo-pcu/+/33118 )

Change subject: pcu_utils.h: Replace software based bitcount impl with gcc builtin ......................................................................

pcu_utils.h: Replace software based bitcount impl with gcc builtin

The cast for different types it's not really needed, simply use the unsigned long long version to make sure we don't drop 1s, in any case __builtin_popcountll() will be quicker than what we used to have.

Change-Id: I80ae72d34d53564fc3da1601ee48c8b2ffe79735 --- M src/pcu_utils.h 1 file changed, 15 insertions(+), 9 deletions(-)

Approvals: laforge: Looks good to me, approved fixeria: Looks good to me, but someone else must approve Jenkins Builder: Verified

diff --git a/src/pcu_utils.h b/src/pcu_utils.h index a6beab0..0be37e9 100644 --- a/src/pcu_utils.h +++ b/src/pcu_utils.h @@ -67,17 +67,10 @@ 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

static inline uint8_t pcu_lsb(uint8_t x) {