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SubjectRe: SSE related security hole
>> Ummm...last I knew, fxrstor is *expensive*. The fninit/xor regs setup
>> is likely *very* much faster. Someone should check this before we
>> sacrifice 100 cycles needlessly or something.
> most probably yes, fxrestor needs to read ram, pxor also takes some
> icache and bytecode ram but it sounds like it will be faster.
> Maybe we could also interleave the pxor with the xorps, since they uses
> different parts of the cpu, Honza?

You almost certainly should. The reason I suggested FXRSTOR is that it
would initialize the entire FPU, including any state that future
processors may add, thus reducing the likelihood of any funnies in the

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