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Why we don't have 128-bit CPUs
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this post was submitted on 23 Jun 2024
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Addressing-wise, no we don't have consumer level 128bit CPUs and probably won't ever need them.
Instructions though, SSE had some 128bit ops (OR/XOR, MOVE) and AVX is 128bit vector math. AVX2 is 256bit vector math, AVX512 is- you guessed it 512bit vector math. AltiVec on PPC had 128bit vectors 20 years ago.