diff options
| author | Björn-Egil Dahlberg <[email protected]> | 2012-11-14 15:47:37 +0100 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2012-11-21 17:42:27 +0100 |
| commit | c519fd567d661d7d75a678455b2e9651ba3b421d (patch) | |
| tree | 033d8ba00fef9c534a44579a51b3e4e4e540d942 | |
| parent | 87004cf5c70a528bb34fee9c629257c494a3f61a (diff) | |
| download | otp-c519fd567d661d7d75a678455b2e9651ba3b421d.tar.gz otp-c519fd567d661d7d75a678455b2e9651ba3b421d.tar.bz2 otp-c519fd567d661d7d75a678455b2e9651ba3b421d.zip | |
erts: Don't let zero be considered a power of two
| -rw-r--r-- | erts/emulator/sys/common/erl_mseg.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/erts/emulator/sys/common/erl_mseg.c b/erts/emulator/sys/common/erl_mseg.c index 5fff8e5ed7..84830d91ec 100644 --- a/erts/emulator/sys/common/erl_mseg.c +++ b/erts/emulator/sys/common/erl_mseg.c @@ -68,7 +68,7 @@ #define ALIGNED_CEILING(X) ALIGNED_FLOOR((X) + INV_ALIGNED_MASK) #define MAP_IS_ALIGNED(X) (((UWord)(X) & (MSEG_ALIGNED_SIZE - 1)) == 0) -#define IS_2POW(X) (((X) & ((X) - 1)) == 0) +#define IS_2POW(X) ((X) && !((X) & ((X) - 1))) static ERTS_INLINE Uint ceil_2pow(Uint x) { int i = 1 << (4 + (sizeof(Uint) != 4 ? 1 : 0)); x--; |