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by brucehoult
612 days ago
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31x4 = 124 bytes :-) The Zero register doesn't have to physically exist, and we're talking about 32 bit CPUs e.g. Pi Pico 2 here, right. Ok, 128 bytes if you add in the PC. Except for RV32E -- as seen in the very popular $0.10 CH32V003 -- which has 15x4 = 60 bytes of GPRs, plus the PC. Plus usually a few CSRs on practical CPUs, though Zicsr is an extension so you don't have to have it. |
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