That way lies madness
That way lies madness
Posted Apr 3, 2012 20:49 UTC (Tue) by ibukanov (subscriber, #3942)In reply to: That way lies madness by Richard_J_Neill
Parent article: The x32 system call ABI
> Given that x86 accesses memory 32-bits at a time anyway,
On modern CPU memory is addressed internally by cache lines that are typically 16-32-64 bytes in size. On x86 the byte access is just as fast as 32-bit access. Moreover, misaligned access to 32-bit values is allowed and is not costly as long as the variable does not cross the cache line boundary.