On Tue, Sep 13, 2005 at 11:44:55PM -0400, Kyle Moffett wrote:
> PowerPC was designed 64-bit from the start too! It's just that the
> architecture design group also realized that there would be a demand
> for 32-bit CPUs, and so from the _64-bit_ system, they designed a 32-
> bit system whose entire instruction set would be forward-compatible
> to 64-bit systems when they came out. That's why 32-bit PowerPC
> machine code and 64-bit PowerPC machine code are completely identical
> except that 64-bit CPUs also have a few opcodes to process 64-bit
> data and a few extra kernel-mode registers.
Hmm, so how does that fit with needing both 32 and 64bit libraries on a
ppc system? It seems apple forgot the 64bit part of a library recently
in a security fix, or is that something more to do with their os than
the cpu?
Len Sorensen
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