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some script fixes and izx0 image format

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Irmen de Jong committed 2026-08-09 12:26:59 +02:00
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docs/source/todo.rst
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@@ -55,7 +55,8 @@ Romable (%option romable)
IR/VM
^^^^^
- make long shifts with values >= 32 consistent across targets: virtual wraps the shift count mod 32 (``5 << 33`` becomes ``5 << 1`` = 10), but qemu68k saturates to 0. uword shifts with values > 15 are an error. Pick one behavior and apply uniformly (also affects the ``examples/test.p8`` bit-shift tests, which currently have to omit 33 for long to stay target-agnostic).
- encode indexed scaling into IR (so that m68k codegen can use scale factor addressing) see ideas/scaled-indexing-IR.md
- make long shifts with values >= 32 consistent across targets: virtual wraps the shift count mod 32 (``5 << 33`` becomes ``5 << 1`` = 10), but qemu68k saturates to 0. uword shifts with values > 15 are an error.
- maybe change all branch instructions to have 2 exits (label if branch condition true, and label if false) instead of 1, and get rid of the implicit "next code chunk" link between chunks.
- implement more TODOs in AssignmentGen?
- add more optimizations in IRPeepholeOptimizer?