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

## 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.
remove useless sets (#252) 2021-02-11 14:35:28 -05:00			`## 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)
fix 2021-02-11 16:13:03 -05:00			- 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`
[Decompiler] Misc fixes for gkernel/math (#257) * more cases * some work on math and floating point stuff * some decompiling for fun 2021-02-13 11:32:52 -05:00
			`## 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`.
[Decompiler] More fixes for gkernel (#261) * fix bugs and more address of support * support for zero checks * fix tests 2021-02-14 18:50:45 -05:00			- 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.