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I'm planning on going back to 8-bit branching. 16-bit br cells incur a non-negligible penalty and, while at first 64 words (128 bytes forward or backward) seemed a bit limiting, I now don't see why one would ever construct such a big branch. It would be un-forthy. Also, I looked at using BC instead of IY to hold IP and the transition would be a lot easier with 8-bit branching. In this commit, all I do is add overflow checks in IF. The mechanic below doesn't change. I'll give myself some time to think it over so that I avoid yet another back and forth.
12 lines
428 B
Plaintext
12 lines
428 B
Plaintext
Branching
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Branching in Collapse OS is limited to 8-bit. This represents
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64 word references forward or backward. While this might seem
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a bit tight at first, having this limit saves us a non-
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negligible amount of resource usage.
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The reasoning behind this intentional limit is that huge
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branches are generally a indicator that a logic ought to be
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simplified. So here's one more constraint for you to help you
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towards simplicity.
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