Lennart Sorensen wrote:
ia64 also wasn't an extension on an existing 32bit design the way sparc,
ppc, mips and x86_64 have done.
yeah, the only differene here is that x86_64 performs a hell of a lot
better in 99% of cases where a 32 bit compile performs next to a 64 bit
compile. In the case of the other architectures the 64 bit modes are
extensions of sorts, used for scientific and/or large calculations which
benefit from 64-bit datatypes and transactions.
Is the alpha also pure 64bit?
Alpha was designed 64-bit from the start. DEC did a lot of neat things
with the design of that processor -- it's a shame it went the way of the
dodo when ia64 was proposed.
Of course mips is extra fun in having two 32bit formats and one 64bit
format.
Fun stuff. Another good architecture that bit the ia64 bug and got
stung.
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