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69 lines
5.2 KiB
ReStructuredText
69 lines
5.2 KiB
ReStructuredText
TODO
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====
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For next release
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^^^^^^^^^^^^^^^^
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- string.find should return index of found character + carry set if found, carry clear if not found. (fix cx16assem, it uses current behavior. Also fix docs!)
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- if char in "string" should fall back to string.find if string is longer than... 16?
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...
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Need help with
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^^^^^^^^^^^^^^
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- c128 target: various machine specific things (free zp locations, how banking works, getting the floating point routines working, ...)
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- other targets such as Atari 800XL: all required details about the machine, I have no clue whatsoever
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- see the Porting Guide in the documentation for this.
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Blocked by an official Commander-x16 r39 release
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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- simplify cx16.joystick_get2() once this cx16 rom issue is resolved: https://github.com/commanderx16/x16-rom/issues/203
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(I hope this will be included into the r39 roms when they get released)
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Future Things and Ideas
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^^^^^^^^^^^^^^^^^^^^^^^
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- nameInAssemblyCode() should search smarter
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- Typecastexpression.isSimple: make it 'expression.isSimple' rather than always false. (this breaks some things atm)
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- IdentifierReference: fix equality to also include position. CallGraph can then also only store IdentifierRef instead of pair(ident, position) as keys.
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- Fix: don't report as recursion if code assigns address of its own subroutine to something, rather than calling it
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- allow "xxx" * constexpr (where constexpr is not a number literal, now gives expression error not same type)
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- can we promise a left-to-right function call argument evaluation? without sacrificing performance
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- unify FunctioncallExpression + FunctioncallStatement and PipeExpression + Pipe statement, may require moving Expression/Statement into interfaces instead of abstract base classes
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- for the pipe operator: recognise a placeholder (``?`` or ``%`` or ``_``) in a non-unary function call to allow things as ``4 |> mkword(?, $44) |> print_uw``
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- make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as ``v_``
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then we can get rid of the instruction lists in the machinedefinitions as well?
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- make it possible to inline non-asmsub routines that just contain a single statement (return, functioncall, assignment)
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but this requires all identifiers in the inlined expression to be changed to fully scoped names
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- simplifyConditionalExpression() should not split expression if it still results in stack-based evaluation
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- simplifyConditionalExpression() sometimes introduces needless assignment to r9 tempvar
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- consider adding McCarthy evaluation to shortcircuit and and or expressions. First do ifs by splitting them up? Then do expressions that compute a value?
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- use more of Result<> and Either<> to handle errors/ nulls better?
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- rethink the whole "isAugmentable" business. Because the way this is determined, should always also be exactly mirrorred in the AugmentableAssignmentAsmGen or you'll get a crash at code gen time.
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- can we get rid of pieces of asmgen.AssignmentAsmGen by just reusing the AugmentableAssignment ? generated code should not suffer
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- c64: make the graphics.BITMAP_ADDRESS configurable (VIC banking)
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- optimize several inner loops in gfx2 even further?
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- add modes 2 and 3 to gfx2 (lowres 4 color and 16 color)?
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- add a flood fill routine to gfx2?
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- add a diskio.f_seek() routine for the Cx16 that uses its seek dos api?
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- make it possible for diskio to read and write from more than one file at the same time (= use multiple io channels)?
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- fix problems in c128 target
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- add (u)word array type (or modifier?) that puts the array into memory as 2 separate byte-arrays 1 for LSB 1 for MSB -> allows for word arrays of length 256
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- [problematic due to 64tass:] add a compiler option to not remove unused subroutines. this allows for building library programs. But this won't work with 64tass's .proc ...
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Perhaps replace all uses of .proc/.pend by .block/.bend will fix that?
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(but we lose the optimizing aspect of the assembler where it strips out unused code.
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There's not really a dynamic switch possible as all assembly lib code is static and uses one or the other)
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- get rid of all TODO's in the code ;)
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More optimization ideas
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^^^^^^^^^^^^^^^^^^^^^^^
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- translateFunctioncall() in BuiltinFunctionsAsmGen: should be able to assign parameters to a builtin function directly from register(s), this will make the use of a builtin function in a pipe expression more efficient without using a temporary variable
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- translateNormalAssignment() -> better code gen for assigning boolean comparison expressions
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- when a for loop's loopvariable isn't referenced in the body, and the iterations are known, replace the loop by a repeatloop
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- automatically convert if statements that test for multiple values (if X==1 or X==2..) to if X in [1,2,..] statements, instead of just a warning.
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- rewrite expression tree evaluation such that it doesn't use an eval stack but flatten the tree into linear code that uses a fixed number of predetermined value 'variables'?
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- this removes the need for the BinExprSplitter? (which is problematic and very limited now)
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and perhaps as well the assignment splitting in BeforeAsmAstChanger too
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- introduce byte-index operator to avoid index multiplications in loops over arrays? see github issue #4
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