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57 lines
3.5 KiB
ReStructuredText
57 lines
3.5 KiB
ReStructuredText
TODO
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====
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For next compiler release (7.6)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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see if the 16 bit repeat code can be optimized on 65c02 a bit more as well, like the 8 bit
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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
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^^^^^^
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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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- fix the asm-labels problem (github issue #62)
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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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- get rid of all TODO's in the code
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- improve testability further, add more tests
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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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- add a switch to not create the globals-initialization logic, but instead create a smaller program (that can only run once though)
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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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- [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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More code optimization ideas
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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- if a for loop's loopvariable isn't referenced in the body, replace 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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- byte typed expressions should be evaluated in the accumulator where possible, without (temp)var
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for instance value = otherbyte >> 1 --> lda otherbite ; lsr a; sta value
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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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- introduce byte-index operator to avoid index multiplications in loops over arrays? see github issue #4
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