this post was submitted on 22 Nov 2023
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Do today chips still have die space for old instruction set? (alien.top)
submitted 11 months ago by [email protected] to c/[email protected]
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This is just a nitpicking question. Do Intel chips still have some space/transistors dedicated to SSE3? If they do, why can't they implement SSE3 by other, more powerful instrutions (like AVX) to save die space?

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[–] [email protected] 1 points 11 months ago

why can't they implement SSE3 by other, more powerful instrutions (like AVX)

In short, the instruction semantics are slightly different, so they don't do exactly the same thing. But it's likely that the execution unit hardware is re-used for those.