On Wed, Jan 7, 2009 at 2:47 PM, Ian Lance Taylor <i...@google.com> wrote: > 2) Introduce __attribute__ ((aligned (max))). This will be documented > as having the largest value available for any version of the > architecture, and thus in particular it may change if new versions > of the architecture are released. The value will not change based > on command line options which do not change the ABI; that is, if it > is possible to link together two files compiled with different set > of command line options and expect the result to work, then those > command line options must not change the value of this attribute. > The value will be guaranteed to be sufficient to hold any type, > including any vector type. The default will be BIGGEST_ALIGNMENT. > The value for the x86/x86_64 will (presumably) be 256. >
256 isn't big enough. There are 512bit vectors in the future: http://en.wikipedia.org/wiki/Larrabee_(GPU) 1024bit vector isn't impossible either. -- H.J.
