Re: [jallib] Large_array update

'Oliver Seitz' via jallib Sun, 13 Dec 2020 09:55:57 -0800

 Hi Rob,
the current lib is already "self-adjusting", you can request any size of array 
between 1 and 2048 bytes. By the help of an optimizing compiler, only the 
requested amout of RAM is assigned.
My new lib can assign any size between 1 and (configurable, my default would be 
14848) bytes, so there's no need to have seperate libs for different size 
ranges.
I've never really used python, but this is a good excuse now to get started. I 
could do it in pascal, no? It runs on almost any platform ;-)
Greets,Kiste
    Am Sonntag, 13. Dezember 2020, 18:05:03 MEZ hat Rob CJ <[email protected]> 
Folgendes geschrieben: 
 
 Hi Kiste,
It would be nice to have larger arrays than only 2k. Maybe we should add 
large_array_4k.jal, large_array_8k.jal, large array_16k.jal. You can generated 
those with your script, right? 
As suggested by Rob Hamerling, it would be nice to have a Python version so you 
can run it both on a Windows machine and a Linux machine.
Kind regards,
Rob
Van: 'Oliver Seitz' via jallib <[email protected]>
Verzonden: zondag 13 december 2020 17:10
Aan: [email protected] <[email protected]>
Onderwerp: Re: [jallib] Large_array update Hi Rob,
I've been optimizing the generated code the last few days, there's not much of 
Matt's left... But the compiled size is in most cases significantly smaller 
(like 1100 words less) and in some cases quite a bit faster (running a test 
program in 66% of the time).
Now I was thinking about the lot of comments and nearly-static parts of the 
code, which is now duplicated in my script. Bash is not very good in outputting 
nearly-identical text to several files, so your suggestion to use another 
language is very much appreciated! :-)
If anyone's interested, this is how the "address decoding" works now:
-- get a value from a large byte array
function large_array_1'get(word in address) return byte is
   var byte data
   
   if LARGE_ARRAY_1_SIZE > 1792 then
      if address >= 1792 then
         data = _large_array_1_byte_8h[address - 1792]
      elsif address >= 1536 then
         data = _large_array_1_byte_7h[address - 1536]
      elsif address >=...
This is what it looks like now:
-- get a value from a large byte array
function large_array_1'get(word in address) return byte is
   var byte data
   var byte address_lo at address+0
   var byte address_hi at address+1
   
   if LARGE_ARRAY_1_SIZE > 1792 then
      case address_hi of
         07 : data = _large_array_1_byte_08_08[address_lo] 
         06 : data = _large_array_1_byte_07_08[address_lo] 
         05 : data = _large_array_1_byte_06_08[address_lo] 
        ...

This example is from the byte/PIC16 library, which is the easiest to do.
Especially the PIC14 libraries with 80-byte arrays are not that easy to decode,
but using a case statement instead of a chain of elsif's justifies the address
calculations.

Greets,Kiste

Am Sonntag, 13. Dezember 2020, 16:23:09 MEZ hat Rob Hamerling
<[email protected]> Folgendes geschrieben:

Hello Kiste

On 09/12/2020 15.29, 'Oliver Seitz' via jallib wrote:

Attached you'll find a bash script which generates the large_array libs,
including the output files adjusted to cover the so-far largest RAM space in a
single array.
Nice feature!
Since bash is not particularly cross-platform, it would be nice to translate it
to Python. I believe there exist 'bash-to-python' scripts which might do the
job.

Regards, Rob.

--
Rob Hamerling, Vianen, NL

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Re: [jallib] Large_array update

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