diff options
Diffstat (limited to 'pm_config.in.h')
| -rw-r--r-- | pm_config.in.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/pm_config.in.h b/pm_config.in.h index 72cb477e..d156127e 100644 --- a/pm_config.in.h +++ b/pm_config.in.h @@ -257,12 +257,17 @@ /* UNALIGNED_OK means it's OK to do unaligned memory access, e.g. loading an 8-byte word from an address that is not a multiple of 8. On some systems, such an access causes a trap and a signal. + + This determination is conservative - There may be cases where unaligned + access is OK and we say here it isn't. + + We know unaligned access is _not_ OK on at least SPARC and some ARM. */ -#if defined(__sparc__) -# define UNALIGNED_OK 0 -#else +#if defined(__x86_64__) | defined(__i486__) | defined(__vax__) # define UNALIGNED_OK 1 +#else +# define UNALIGNED_OK 0 #endif |