Can anyone tell me how many registers are in the core i7 with the nehalem architecture? And explain a little to me the registers work in this architecture?
I found only MOB register functionalities, nothing more.
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The MOB isn't registers. https://www.realworldtech.com/nehalem/ David Kanter's deep-dive covers that and more in detail. The regs work the same as in earlier P6 (so see Kanter's https://www.realworldtech.com/merom/5/), with a retirement register file for that state, and tracking live values in the ROB. See also Agner Fog's microarch PDF on, https://agner.org/optimize/. (And maybe other links in https://stackoverflow.com/tags/x86/info in general, like https://uops.info/. https://en.wikichip.org/wiki/intel/microarchitectures/nehalem_(client) doesn't have much of anything on that old uarch.) – Peter Cordes Nov 13 '22 at 21:18