Jaguar Gpu Debugger

[Orion_]

ok, it has been about 2 months released in private beta now I try a public release

 

here is a little Jaguar GPU Debugger I made to get rid of headaches I had coding on the jaguar gpu ^^

it's far from being complete but it helps debugging the common gpu/dsp code I do, and hopefully will helps you too

the source code are fully included and can be compiled with the free "delphi like" compiler: Lazarus

so you can add any features you want or correct some bugs

 

Enjoy

 

GPU Debugger v0.8 beta, source included

 

[Pocket]

Thanks for releasing it !

[SebRmv]

Thanks for this.

 

Do you emulate the GPU pipeline also?

 

About division, how do you emulate 16.16 division?

What is a 16.16 division?

Do you also emulate that the G_REMAIN does not

necessary contain the remainder but a value

that permits to compute the remainder?

[Orion_]

Do you emulate the GPU pipeline also?

read the readme

I don't emulate that, because it would be a bit complicated to represent in the debugger, plus, the debugging process would be fastidious and a bit strange if it was following the exact pipeline.

 

About division, how do you emulate 16.16 division?

What is a 16.16 division?

Do you also emulate that the G_REMAIN does not

necessary contain the remainder but a value

that permits to compute the remainder?

I don't emulate any of that for the moment

[ray]

excellent stuff man!

 

thanks very much for releasing it!

[Symmetry of TNG]

Asshoot... though I commented on this =)

 

This is just great work man!..

I never got the GPU debugger option to work with my alpine.. so always debugged code in my head.

Now i can use it for something else =)

 

I hope work on this will be continued it is a verry useful tool.

 

THANK Y-O-U! Orion & coworkers for beeing the F-I-R-S-T one to release such a Great! tool for the jaguar scene!

 

/Sym

[SebRmv]

About division, how do you emulate 16.16 division?

What is a 16.16 division?

Do you also emulate that the G_REMAIN does not

necessary contain the remainder but a value

that permits to compute the remainder?

 

I know I can hack myself the code

 

Anyway, it seems that you can emulate the division unit of the GPU/DSP

by doing

 

q = a/b
REMAIN = a%b
if (q & 1) == 0 then REMAIN-=b;

 

For the 16.16 division, it is simply the result of dividing

(a << 16) by b

(48 bits integer for (a << 16))

 

 

[Orion_]

added the v0.8 of the debugger, with G_REMAIN and other stuffs

 

[SebRmv]

I have just tested it. It works even with wine under linux!!

 

This is really a cool app, thank you Orion!

 

I found a bug: ADDC is not correctly emulated.

 

Looking at the source, I think you update the Carry FLAG too early.

(ie before doing the addition !)

 

 

 

[Orion_]

thanks, I will take a look at ADDC

I think you can compile it directly for linux because lazarus is multiplatform

maybe you could add a linux version to the distribution

[SebRmv]

thanks, I will take a look at ADDC

I think you can compile it directly for linux because lazarus is multiplatform

maybe you could add a linux version to the distribution

 

I just quickly tested this morning and I was too lazy to recompile it

but I'll try that.

If I manage to get lazarus working on my PC, I will even try to fix the

problem of ADDC (and probably SUBC too)