PowerPC For Dummies: A simplified guide to understanding the PowerPC Instruction Set
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(06-23-2021, 09:07 AM)WhatisLoaf Wrote: Nice work! Assembly can be really tricky to wrap your head around when learning it for the first time.
I skimmed the page and I'd say there are a few things I would change:

- Under "Operation Terms", it's not the last bit that is checked, it's all of them. E.g. (011 AND 101) gives 001
- The definition of or OR should be "if at least one of the values is TRUE, the result is TRUE"
- ori does not load into the lower 16 bits, it OR's the lower 16 bits. E.g. if r1 contains 0xFFFFFFFF FFFF0000 and you do "ori r1, r1, 0xFFFF you'll get 0xFFFFFFFF FFFFFFFF

In general, you won't ever need most of these instructions, so I wouldn't worry to much if you don't understand all of them (I personally barely know maybe half of them)

Thanks!
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RE: PowerPC For Dummies: A simplified guide to understanding the PowerPC Instruction Set - by JimmyKazakhstan - 06-23-2021, 04:04 PM

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