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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] 1 points 10 months ago

A lot of x86 ISA is in the micro and PAL codes. Only the most frequent and performance-limiting ones are on-core for modern x86.

x86 is a huge set, so "very few" is a relative term ;-)

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