diff options
Diffstat (limited to 'vm_method.c')
| -rw-r--r-- | vm_method.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/vm_method.c b/vm_method.c index fce8add6ef..781f95fdcd 100644 --- a/vm_method.c +++ b/vm_method.c @@ -5,8 +5,13 @@ #ifndef GLOBAL_METHOD_CACHE_SIZE #define GLOBAL_METHOD_CACHE_SIZE 0x800 #endif +#define LSB_ONLY(x) ((x) & ~((x) - 1)) +#define POWOR_OF_2_P(x) ((x) == LSB_ONLY(x)) +#if !POWOR_OF_2_P(GLOBAL_METHOD_CACHE_SIZE) +# error GLOBAL_METHOD_CACHE_SIZE must be power of 2 +#endif #ifndef GLOBAL_METHOD_CACHE_MASK -#define GLOBAL_METHOD_CACHE_MASK 0x7ff +#define GLOBAL_METHOD_CACHE_MASK (GLOBAL_METHOD_CACHE_SIZE-1) #endif #define GLOBAL_METHOD_CACHE_KEY(c,m) ((((c)>>3)^(m))&GLOBAL_METHOD_CACHE_MASK) |