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75 lines
1.9 KiB
Markdown
75 lines
1.9 KiB
Markdown
[< back to index](../doc_index.md)
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# Guide to generated label names
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Many Millfork constructs generate labels.
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Knowing what they mean can be useful when reading the generated assembly code.
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Every generated label is of form `.xx__11111`
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where `11111` is a sequential number and `xx` is the type:
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* `ah` – optimized addition of carry
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* `an` – logical conjunction short-circuiting
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* `bc` – array bounds checking (`-fbounds-checking`)
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* `bo` – boolean type conversions
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* `c8` – constant `#8` for `BIT` when immediate addressing is not available
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* `co` – greater-than comparison
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* `cp` – equality comparison for larger types
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* `dd` – labels renamed by code deduplication
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* `de` – decrement for larger types
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* `do` – beginning of a `do-while` statement
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* `ds` – decimal right shift operation
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* `dv` – division and modulo operations
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* `el` – beginning of the "else" block in an `if` statement
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* `ew` – end of a `while` statement
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* `fi` – end of an `if` statement
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* `fe` – body of an `for` statement over a list
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* `fo` – certain optimized `for` loops
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* `he` – beginning of the body of a `while` statement
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* `in` – increment for larger types
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* `is` – optimized addition of carry using undocumented instructions
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* `lj` – extra labels generated when converting invalid short jumps to long jumps
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* `me` – start of a `for` loop doing bulk memory operations
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* `ms` – bulk memory operations
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* `no` – nonet to word extension caused by the `nonet` operator
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* `od` – end of a `do-while` statement
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* `or` – logical alternative short-circuiting
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* `sx` – sign extension, from a smaller signed type to a larger type
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* `th` – beginning of the "then" block in an `if` statement
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* `to` – end of a `for-to` loop
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* `ur` – a copy due to loop unrolling
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* `wh` – beginning of a `while` statement
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* `xc` – automatically extracted subroutine of commonly repeating code
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