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Intel optimizes slimmed-down X86S instruction set — revision 1.2 eliminates 16-bit and 32-bit features
(www.tomshardware.com)
this post was submitted on 25 Sep 2024
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If those instruction sets take up a set place on the processing pipeline, eliminating them could be a huge performance boost. Additionally, the removal of the instruction sets would reduce the size of the chip’s die which could result in shorter signal paths.
I don't have enough hardware knowledge to dispute that, but I have a feeling that's not that easy to gain massive performance boost. If I recall correctly, the biggest Apple's ARM CPU advantage has to do with fixed instruction length whereas x86 is variable. Fixed one gives you an prediction advantage because you exactly know how many instructions are in cache and where are they located - something along this. But let's hope for the better.