Since this is the first time that you've all had to support an
optional vector ISA extension (for real) on the platform
Can SSSE3 (and SSE3) be assumed when compiling 64-bit code, or do
we really need to handle the 64-bit, SSE2-only case?
I am not aware of any announcement from Apple on this subject. You
might contact DTS. There are x86_64 CPUs in production that do not
support SSSE3 out there, so it's best to be conservative. I'm not
aware of any that don't support SSE3 that do support x86_64.
As a practical matter, if you are going to the trouble to separate
out code for 32-bit, it seems like the natural thing to me to
separate it out for 64-bit too.
Ian
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