Talk:Binary recompiler

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DRI introduced a *binary* translator or a *source* translator?

Source-to-source compiler#XLT86 claims that XLT86 translated 8080 assembler language to 8086 assembler language, not 8080 machine code to 8086 machine code. This manual for XLT86 says the same thing.

Did Digital Research also have a binary-to-binary translator, or are the references speaking of a binary-to-binary translator from DRI confused? Guy Harris (talk) 21:04, 5 January 2018 (UTC)

XLT86 was an optimizing source-to-source translator, not high-level to high-level, but from assembly code to assembly code. Since there is (almost) a one-to-one correlation between assembly language and actually executable machine code, the sources are somewhat misleading in regard to the nomenclature when they talk about binary recompilation, but not totally confused either.

One can think of binary recompilation through XLT86 as a batch process involving a disassembler, the source-to-source translator and an assembler. Disassemblers and assemblers were also available in various forms from Digital Research.

Also, XLT86 was not a straight-forward translator carrying out only transliterations, but it performed global data flow analysis and was applying various optimizations. The multi-pass translator translated the input into some binary in-memory structure representing the program graph. This is even closer to binary recompilation, except for that the output was, again, human-readable assembly code rather than a binary image.

In summary, the references could have been more clear about it, but nevertheless XLT86 set the groundwork for binary recompilation as well.

--Matthiaspaul (talk) 20:19, 22 January 2020 (UTC)