diff options
| author | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-06-13 20:59:15 +0000 |
|---|---|---|
| committer | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-06-13 20:59:15 +0000 |
| commit | 7d7f932c01b560eeaf9aae975898ab360e86a8ea (patch) | |
| tree | cbe430cf815888e54ca03d695d90c0080af272a0 /translate.c | |
| parent | 8f5e92b24d534e308859bb23b11efbed0858f52e (diff) | |
use a compiler builtin (which uses processor instructions) for this operation
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@33933 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'translate.c')
| -rw-r--r-- | translate.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/translate.c b/translate.c index 6bb313871..256130c82 100644 --- a/translate.c +++ b/translate.c @@ -74,13 +74,15 @@ static struct translator_path tr_matrix[MAX_FORMAT][MAX_FORMAT]; */ /*! \brief returns the index of the lowest bit set */ -static int powerof(int d) +static force_inline int powerof(unsigned int d) { - int x; - for (x = 0; x < MAX_FORMAT; x++) - if ((1 << x) & d) - return x; - ast_log(LOG_WARNING, "Powerof %d: No power??\n", d); + int x = ffs(d); + + if (x) + return x - 1; + + ast_log(LOG_WARNING, "No bits set? %d\n", d); + return -1; } |