diff options
Diffstat (limited to 'lib/igt_aux.h')
| -rw-r--r-- | lib/igt_aux.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/igt_aux.h b/lib/igt_aux.h index ef89faa9..192c3ad8 100644 --- a/lib/igt_aux.h +++ b/lib/igt_aux.h @@ -287,4 +287,10 @@ void igt_lsof(const char *dpath); #define is_power_of_two(x) (((x) & ((x)-1)) == 0) +#define igt_fls(x) ((x) ? __builtin_choose_expr(sizeof(x) == 8, \ + 64 - __builtin_clzll(x), \ + 32 - __builtin_clz(x)) : 0) + +#define roundup_power_of_two(x) ((x) != 0 ? 1 << igt_fls((x) - 1) : 0) + #endif /* IGT_AUX_H */ |