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I have been working on this project on and off for about 6 months. I would love feedback on the code, design - whatever!

dsturnbull2049 12y ago
Very concise implementation. I keep thinking there's missing files or at least I'm missing something in my understanding. :) I wrote a 0-operand VM in C a few years ago that used a lot of the same concepts but considerably more code, like 10x at least. I will learn a lot from this.
- tekknolagi 12y ago
  What kinds of files look missing? I'm curious. What is a 0 operand VM? I'd love to see it!
  - chewxy 12y ago
    Using only PUSH and POP I think. i.e a stack machine. also, OP, your code looks great.
    - tekknolagi 12y ago
      Oh interesting. That sounds... complicated. Thanks! It's my first big C project that isn't hideous :D
    - dsturnbull2049 12y ago
      Yeah, a stack machine. https://github.com/dsturnbull/stack_cpu https://github.com/dsturnbull/stack_cpu What I mean by missing files is that it's so clean that at first glance it didn't look like the whole deal :)
      - tekknolagi 12y ago
        Oh well thanks — that's quite a compliment. This is pretty cool!
  - Hytosys 12y ago
    Just for anyone looking for more information: http://en.wikipedia.org/wiki/Instruction_set#Number_of_operands http://en.wikipedia.org/wiki/Instruction_set#Number_of_opera...
    - tekknolagi 12y ago
      Awesome!
- listic 12y ago
  Unfortunately, with the ever-increasing processor-memory gap (the growing discrepancy between processor and memory speeds, also called Memory Wall, if I'm not mistaken), 0-operand, or stack VM's are seeing ever-increasing performance penalties.
ghkbrew 12y ago
Is there a reason for the combination of register-based (logical ops) and stack-based (arithmetic ops) operations? Otherwise fun project.
- tekknolagi 12y ago
  Probably just my sloppiness. Things like OR were implemented while looking at other projects like tinyvm, so it's not perfectly consistent.
zura 12y ago
Nice. Any particular tutorial/article/book you're following?
- tekknolagi 12y ago
  Nope :) Lots of small web resources.
- wsc981 12y ago
  Perhaps, if you're interested in learning to write well-written C code, you might be interested in the book "C Programming: A Modern Approach"[0] by King. Coding style is an important topic in his book. [0]: http://www.amazon.com/Programming-Modern-Approach-2nd-Edition/dp/0393979504 http://www.amazon.com/Programming-Modern-Approach-2nd-Editio...
  - zura 12y ago
    Thank you, seems very interesting. Usually, I only write pure C code when I really have to. Otherwise, I see no reason why someone should restrict "shimself" from using C++.

dsturnbull2049 12y ago

Very concise implementation. I keep thinking there's missing files or at least I'm missing something in my understanding. :) I wrote a 0-operand VM in C a few years ago that used a lot of the same concepts but considerably more code, like 10x at least. I will learn a lot from this.

tekknolagi 12y ago
What kinds of files look missing? I'm curious. What is a 0 operand VM? I'd love to see it!
- chewxy 12y ago
  Using only PUSH and POP I think. i.e a stack machine. also, OP, your code looks great.
  - tekknolagi 12y ago
    Oh interesting. That sounds... complicated. Thanks! It's my first big C project that isn't hideous :D
  - dsturnbull2049 12y ago
    Yeah, a stack machine. https://github.com/dsturnbull/stack_cpu https://github.com/dsturnbull/stack_cpu What I mean by missing files is that it's so clean that at first glance it didn't look like the whole deal :)
    - tekknolagi 12y ago
      Oh well thanks — that's quite a compliment. This is pretty cool!
- Hytosys 12y ago
  Just for anyone looking for more information: http://en.wikipedia.org/wiki/Instruction_set#Number_of_operands http://en.wikipedia.org/wiki/Instruction_set#Number_of_opera...
  - tekknolagi 12y ago
    Awesome!
listic 12y ago
Unfortunately, with the ever-increasing processor-memory gap (the growing discrepancy between processor and memory speeds, also called Memory Wall, if I'm not mistaken), 0-operand, or stack VM's are seeing ever-increasing performance penalties.

ghkbrew 12y ago

Is there a reason for the combination of register-based (logical ops) and stack-based (arithmetic ops) operations? Otherwise fun project.

tekknolagi 12y ago
Probably just my sloppiness. Things like OR were implemented while looking at other projects like tinyvm, so it's not perfectly consistent.

zura 12y ago

Nice. Any particular tutorial/article/book you're following?

tekknolagi 12y ago
Nope :) Lots of small web resources.
wsc981 12y ago
Perhaps, if you're interested in learning to write well-written C code, you might be interested in the book "C Programming: A Modern Approach"[0] by King. Coding style is an important topic in his book. [0]: http://www.amazon.com/Programming-Modern-Approach-2nd-Edition/dp/0393979504 http://www.amazon.com/Programming-Modern-Approach-2nd-Editio...
- zura 12y ago
  Thank you, seems very interesting. Usually, I only write pure C code when I really have to. Otherwise, I see no reason why someone should restrict "shimself" from using C++.