Thanks, my mistake was searching exclusively for Intel micro-architecture. It'd be interesting to see if there are further similar die breakdowns for other micr

Thanks, my mistake was searching exclusively for Intel micro-architecture. It'd be interesting to see if there are further similar die breakdowns for other micro-architectures around, trawling through conference proceedings likely to yield better results than a quick Google. Just skimming through hot chips as it has a publicly accessible archive (those AMD die breakdowns come from ISSCC which isn't so easily accessible). The decoder is certainly a reasonable fraction of the core area, though as a fraction of total chip area it's still not too much as other units in core are of similar size or larger size (Floating point/SIMD, branch prediction, load/store, L2) plus all of the uncore stuff (L3 in particular). Really we need a similar die shot of a big arm core to compare its decoder size too. Hotchips 2019 has a highlighted die plot of an N1 with different blocks coloured but sadly it doesn't provide a key as to which block is what colour.