prog8/docs/source/todo.rst

====
TODO
====

- fix imageviewer only showing first image
- fix errors in comparison changes
- add cx16 vload()

- optimize several inner loops in gfx2
- hoist all variable declarations up to the subroutine scope *before* even the constant folding takes place (to avoid undefined symbol errors when referring to a variable from another nested scope in the subroutine)
- optimize swap of two memread values with index, using the same pointer expression/variable, like swap(@(ptr+1), @(ptr+2))
- add a flood fill routine to gfx2?
- add modes 2 and 3 to gfx2 (lowres 4 color and 16 color) ?
- add a f_seek() routine for the Cx16 that uses its seek dos api?
- refactor the asmgen into their own submodule?
- refactor the compiler optimizers into their own submodule?
- optimizer: detect variables that are written but never read - mark those as unused too and remove them, such as uword unused = memory("unused222", 20) - also remove the memory slab allocation
- add a compiler option to not remove unused subroutines. this allows for building library programs
- make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as ``v_``
- option to load the built-in library files from a directory instead of the embedded ones (for easier library development/debugging)
- c64: make the graphics.BITMAP_ADDRESS configurable (VIC banking)
- some support for recursive subroutines?
    - via %option recursive?: allocate all params and local vars on estack, don't allow nested subroutines, can begin by first not allowing any local variables just fixing the parameters
    - Or via a special recursive call operation that copies the current values of all local vars (including arguments) to the stack, replaces the arguments, jsr subroutine, and after returning copy the stack back to the local variables
- get rid of all other TODO's in the code ;-)

More optimizations
^^^^^^^^^^^^^^^^^^

Add more compiler optimizations to the existing ones.

- further optimize assignment codegeneration, such as the following:
- rewrite expression code generator to not use eval stack but a fixed number of predetermined value 'variables' (1 per nesting level?)
- binexpr splitting (beware self-referencing expressions and asm code ballooning though)
- more optimizations on the language AST level
- more optimizations on the final assembly source level


Misc
^^^^

Several ideas were discussed on my reddit post
https://www.reddit.com/r/programming/comments/alhj59/creating_a_programming_language_and_cross/
new docs 2018-08-06 01:35:43 +00:00			`====`
			`TODO`
			`====`

improve word '<', word (u)word '<=' , uword '>=' codegen 2021-03-16 17:15:47 +00:00			`- fix imageviewer only showing first image`
			`- fix errors in comparison changes`
todo 2021-03-13 23:00:45 +00:00			`- add cx16 vload()`
additional optimization to the bresenham line routines 2021-03-10 17:49:40 +00:00
version 2021-03-06 22:07:30 +00:00			`- optimize several inner loops in gfx2`
fixed invalid removal of string tag from memory() 2021-02-16 22:58:31 +00:00			`- hoist all variable declarations up to the subroutine scope before even the constant folding takes place (to avoid undefined symbol errors when referring to a variable from another nested scope in the subroutine)`
todo 2021-02-07 18:08:47 +00:00			`- optimize swap of two memread values with index, using the same pointer expression/variable, like swap(@(ptr+1), @(ptr+2))`
			`- add a flood fill routine to gfx2?`
version 2021-03-06 22:07:30 +00:00			`- add modes 2 and 3 to gfx2 (lowres 4 color and 16 color) ?`
optimize pointer var access if var is already on zeropage 2021-01-16 17:09:47 +00:00			`- add a f_seek() routine for the Cx16 that uses its seek dos api?`
reducing dependencies 2021-02-20 16:33:45 +00:00			`- refactor the asmgen into their own submodule?`
			`- refactor the compiler optimizers into their own submodule?`
clearer naming 2021-01-07 00:25:50 +00:00			`- optimizer: detect variables that are written but never read - mark those as unused too and remove them, such as uword unused = memory("unused222", 20) - also remove the memory slab allocation`
fixed missing code for certain memread expressions when casted to uword 2021-01-19 23:28:54 +00:00			`- add a compiler option to not remove unused subroutines. this allows for building library programs`
added 'align_word' and 'align_page' block options to control block start address alignment in the assembler 2021-02-21 00:24:44 +00:00			- make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as ``v_``
proper error message for arrays that are declared too big 2020-08-18 12:47:52 +00:00			`- option to load the built-in library files from a directory instead of the embedded ones (for easier library development/debugging)`
todos 2021-02-15 03:41:33 +00:00			`- c64: make the graphics.BITMAP_ADDRESS configurable (VIC banking)`
todos and version 2020-11-10 21:44:48 +00:00			`- some support for recursive subroutines?`
			`- via %option recursive?: allocate all params and local vars on estack, don't allow nested subroutines, can begin by first not allowing any local variables just fixing the parameters`
			`- Or via a special recursive call operation that copies the current values of all local vars (including arguments) to the stack, replaces the arguments, jsr subroutine, and after returning copy the stack back to the local variables`
refactoring 2020-10-22 21:41:16 +00:00			`- get rid of all other TODO's in the code ;-)`
tweak error reporting, expanded lines and circles example 2020-03-21 23:43:46 +00:00
doc 2019-01-24 01:43:25 +00:00			`More optimizations`
			`^^^^^^^^^^^^^^^^^^`

			`Add more compiler optimizations to the existing ones.`

added codengeration for assigment of array of values to a struct variable (all members at once) 2020-10-02 20:37:52 +00:00			`- further optimize assignment codegeneration, such as the following:`
todos 2021-02-15 03:41:33 +00:00			`- rewrite expression code generator to not use eval stack but a fixed number of predetermined value 'variables' (1 per nesting level?)`
added codengeration for assigment of array of values to a struct variable (all members at once) 2020-10-02 20:37:52 +00:00			`- binexpr splitting (beware self-referencing expressions and asm code ballooning though)`
fix warnings about unreachable code 2020-03-24 21:37:42 +00:00			`- more optimizations on the language AST level`
			`- more optimizations on the final assembly source level`
doc 2019-01-24 01:43:25 +00:00
Expressions can now be split over multiple lines. Fixed datatype of len(). 2019-01-26 16:32:26 +00:00
fix some optimizations of loops, added some conditional branch optimizations 2019-01-27 18:14:58 +00:00			`Misc`
			`^^^^`

info 2019-08-11 16:21:15 +00:00			`Several ideas were discussed on my reddit post`
			`https://www.reddit.com/r/programming/comments/alhj59/creating_a_programming_language_and_cross/`