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 10 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] 0 points 10 months ago

No, no CPU has seperate FPUs for SSE & AVX - it's compiled to the same set of uOps by microcode.

Recent x86 CPUs go as far as implementing x87 in the 128b FPU too.