[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [WIP PATCH 02/16] tools/libxl: Tiny optimization of libxl__mac_is_default()
This should result in fewer branch instructions and a small performance gain. Signed-off-by: Elliott Mitchell <ehem+xen@xxxxxxx> --- tools/libs/light/libxl_internal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/libs/light/libxl_internal.c b/tools/libs/light/libxl_internal.c index 32b8788b59..b4b2eb4deb 100644 --- a/tools/libs/light/libxl_internal.c +++ b/tools/libs/light/libxl_internal.c @@ -346,8 +346,8 @@ _hidden int libxl__compare_macs(const libxl_mac *a, const libxl_mac *b) _hidden int libxl__mac_is_default(const libxl_mac *mac) { - return (!(*mac)[0] && !(*mac)[1] && !(*mac)[2] && - !(*mac)[3] && !(*mac)[4] && !(*mac)[5]); + return !((*mac)[0] | (*mac)[1] | (*mac)[2] | + (*mac)[3] | (*mac)[4] | (*mac)[5]); } _hidden int libxl__init_recursive_mutex(libxl_ctx *ctx, pthread_mutex_t *lock) -- -- (\___(\___(\______ --=> 8-) EHM <=-- ______/)___/)___/) \BS ( | ehem+sigmsg@xxxxxxx PGP 87145445 | ) / \_CS\ | _____ -O #include <stddisclaimer.h> O- _____ | / _/ 8A19\___\_|_/58D2 7E3D DDF4 7BA6 <-PGP-> 41D1 B375 37D0 8714\_|_/___/5445
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