Z80 timing

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By Bengalack

Paladin (711)

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12-02-2022, 20:39

theNestruo wrote:

However, I did some internal improvements to support SjASMPlus alternative syntax and fake instructions, and I think that code can be used to support simple user-defined macros.
If re-defining those macros in your settings.json is acceptable (like this line, for example), please open a github issue (or this thread, or an email, etc.) with a couple example macros and I'll take a look at it!

Nice :-) Very interesting. I typically have a set of standard macros, so, for me, this is nothing that necessarily needs to be dynamically/automatically added. I would benefit from a little custom section in such a file :)

By santiontanon

Paragon (1732)

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13-02-2022, 00:54

sounds good!! detecting a "function" is tricky (as some times blocks of code have more than one "ret" statement), but I'll just add some heuristic to try to detect functions automatically as well as possible. I'll try to have it for the next version Smile

By aoineko

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13-02-2022, 01:39

Nice \o/
In the context of assembly code generated by SDCC, it is very easy to detect functions because their label ends with a double "::".
For the code written directly in assembler, it is certainly much more complicated.

By theNestruo

Champion (398)

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13-02-2022, 08:59

Bengalack wrote:
theNestruo wrote:

However, I did some internal improvements to support SjASMPlus alternative syntax and fake instructions, and I think that code can be used to support simple user-defined macros.
If re-defining those macros in your settings.json is acceptable (like this line, for example), please open a github issue (or this thread, or an email, etc.) with a couple example macros and I'll take a look at it!

Nice :-) Very interesting. I typically have a set of standard macros, so, for me, this is nothing that necessarily needs to be dynamically/automatically added. I would benefit from a little custom section in such a file :)

Please send me a couple of macros and a short fragment of code using them so I can envision how to incorporate them and do some tests ^_^

By Bengalack

Paladin (711)

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13-02-2022, 10:16

By santiontanon

Paragon (1732)

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15-02-2022, 05:07

As I was saying before, I think that for small functions, an editor plugin might be easier. But if you want to count function timings for all functions in your code-base. I just added a new flag to MDL that expands the source file table summaries. Before, it would only print size/timing info at the source-file level, but I just added a flag to try to autodetect functions (very simple for now) and output info for them.

The latest development version is here: https://github.com/santiontanon/mdlz80optimizer/releases/tag...

And you can try this doing:

java -jar mdl.jar my-assembler-main.asm -sft-functions -sft timing.tsv

Also, if you are using a particular assembler that has extensions beyond standard z80 syntax (sjasm, sjasmplus, aasmxs, tniasm, pasmo, sdasz, etc.) remember to add the "-dialect" flag (e.g. "-dialect sdcc", or "-dialect tniasm"), or MDL will not parse the code correctly. Without the "-sft-functions", it will only give you information at the individual source-file level (plus included binaries if you also use the "+bin" flag). But anyway, that's enough, MDL has 1 million flags, and some times even I don't remember them all hahaha

By aoineko

Paladin (803)

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15-02-2022, 23:22

I tried java -jar mdl.jar mycode.asm -sft-functions -sft timing.tsv -cpu z80msx -dialect sdasz80 with your new version but the generated timing.tsv only contain 1 function while my code contain 7.
Any idea?

Here is the timing.tsv content:

source file (.function name)	self size	total size	accum t-states
game_pawn.asm	2392	2392	15753/15598
game_pawn.asm.s__INITIALIZED	1972		12959/12824
game_pawn.asm._GamePawn_Draw	331		2221/2201

By santiontanon

Paragon (1732)

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15-02-2022, 23:47

Thanks for checking it out! Smile

And yeah, that can happen. As I mentioned, "function identification" is very simple right now (it just looks for a block of code that starts in a label, and ends in a "ret" or an unconditional jump to a label in another file). It needs to be improved, but it's a start haha. Would you mind sharing an example of one of the functions that was not detected? that would help me improve the function identification code Smile

By aoineko

Paladin (803)

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16-02-2022, 01:02

Here is my test code: https://wtools.io/paste-code/b92D
The functions are:

_GamePawn_Initialize
_GamePawn_SetPosition
_GamePawn_SetAction
_GamePawn_Update
_GamePawn_Draw
_GamePawn_SetTargetPosition
_GamePawn_InitializePhysics

As I said, for the SDCC case, the function detection could be very simple because function label are the only global label (with double "::").

By santiontanon

Paragon (1732)

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16-02-2022, 01:03

Great! thanks! I'll take a closer look at this example and see if I can improve the detection! Indeed, in the SDCC case, it should be easy, I'll add a special case for that! Smile

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