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jak-project/docs/progress-notes/jak1/decompiler_changelog.md

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Version 1

  • Fixed bug where eliminated moves would appear in output in the first condition of a function as (set! a a).
  • Improved expression building immediately before the condition of if/cond
  • Recognize (new 'global 'pair <a> <b>) as (cons <a> <b>)
  • Remove useless (set! <a> #f)
  • Remove useless (set! <a> <b>) and eliminate useless temporaries created by these.
  • Remove useless set!s sometimes appearing around functions (set! <a> (some-function ...)) when the result is unused, but moved into a different register.
  • Recognize (break!) (GOAL breakpoint)
  • Support (new 'process ...)

Version 2

  • Expressions like (set! (-> a b) (-> c d)) are much less likely to have fake temporaries.
  • Many more useless set!s will be removed
  • Stores into arrays are supported
  • Fixed bug where unused/eliminated temporaries would sometimes be used as the result of a block

Version 3

  • Normal use of the process pointer will now show up as pp. Weird use will still be weird.
  • (method-of-object ...) will now be recognized
  • Accessing the address of a variable element of an inline array is supported in some cases. More examples are needed before all work. But for example: (&-> v0-0 stack (-> v0-0 allocated-length)) where stack is an uint8 :dynamic.
  • Cleaned up unneeded casts floating point constant 0.0.
  • Support for fmin/fmax
  • Fixed a bug where integer abs appeared instead of fabs.
  • Some support for float -> integer conversions, but it is not 100% yet.
  • Eliminate inserted coloring moves for function arguments that use mtc1.
  • Support for >= for signed numbers.

Version 4

  • Fix bug in decoding of vdiv, vsqrt, and vrsqrt instructions
  • Support for virtual method calls (may not recognize 100% of cases yet)
  • Support for "weird" new calls
  • Fixed a few "update from stack NYI" errors
  • Array access recognized in more cases with power of two stride.
  • Support for getting the address of something in an inline array with a stride that's not 1 or a power of 2.
  • Fixed a bug in unscrambling coloring moves which sometimes caused the wrong values to be used.
  • Improved nested cond rewriting to eliminate temporaries in more cases when used as a value
  • Support zero? and nonzero? which are evaluated to GOAL booleans.
  • Fix bug where method calls that "passed through" a0 from the caller were not recognized.