202405031100 Understanding How Your CPU Thinks

• Two most important skills for a developer
  • Break problems into smaller problems
  • Communication (with people and with the computer)
• Talked about pipelining
  • increases µops throughput
  • think about doing multiple loads of laundry in washer and dryer
  • f# nice
  • this point was a little off from my understanding of schedulers and the term "pipelining" specifically.
• Caches and different memory locations: registers, L1, L2, L3, RAM, DISK etc.
• Don't use 0V–1.3V and 3.7V-6.3V anymore for memory and heat efficiency. They've shrunk those voltages and tolerances.
• Got into machine code and micro-ops for assembly
  • Importantly, the op and params and everything are all encoded.
  • This is why ARM ops have variable bit sized parameters. They're all encoded into 32 bit instructions, so the specifics of the encoded instructions/params might change the available bits for parameter store.
• Showed the circuit for a 4 bit adder, arbitrarily chainable for higher bits, 32/64.
  • youtube videos:
    • domino computing by standupmaths
    • water computer steve mould
  • how to do multiplication
    • f# "Freestylecoding.Math" bit math lib
    • interesting idea of returning division with remainder as tuple with /% operator
  • least significant first importance for e.g. base conversions
• some talk about knowing the complexity of things like conversions and math helps with loops and hot spots