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Hi! As there's lot of silence about this topic I want to reopen it a little. I've done some research and I noticed that ulv.q corrupts FPU registers (as we all know) in this way: ulv.q C000 --> $f0 ulv.q R000 --> $f0 ulv.q C010 --> $f1 ulv.q R001 --> $f1 ... I've tested to registers R500 so it seems...

Just another quick tip, dont use sceCtrlReadBufferPositive, use sceCtrlPeekBufferPositive (prior caps thread to 60fps) also dont wait for a vblank, rather just setup another thread, or a timer callback that only renders at the desired framerate, that way you dont stall the cpu for stupid things suc...

Of course! Every polygon gets clipped at the near and far plane. Have you realised that fog in some computer games? It's just to avoid the user to see the objects disappear or get sliced at the far plane. The near plane is not a problem, just maintain your camera away from objects. If you do shadowi...

Just decompile using
psp-objdump -d youbinary.elf > decompiled.txt

And search for 0890B8F0 in your listing. Will see something like:

XXXXXXXX: jal <label>
XXXXXXXX: something
0890B8F0: something

label is the function which is failing, so check it

Hope it helps

I use OpenGL, don't use GU, but there's one moment when you define your projection matrix (gluPerspective). So the near plane should be far enough and the far plane close enough. Pushing the near plane a little away should avoid Z fighting. You can paste your code if you want more info. Rendering tr...

Sorry for reopening this post, but I can't find anything in google about this. Where did you exactly find out the register corruption? I'm interested in this. But if I don't use Matrix 0 shoul'd be any problem, isn't it? After some tests on a FAT PSP I notices some bugs related to some register corr...

Don't know how I solved all my problems. I'll explain a little bit so if someone wants to implement something similar. Also I'll upload the game source when I finish it! I use stb_vorbis, which allows you to specify a buffer for all temp data. I allocate a temp buffer on the stack and I use it. The ...

Thanks!!! This answers all my questions. I've decided to use stb_vorbis, which is a vorbis decoder implementation that you can choose to use malloc or it's own allocator in a custom buffer. Now I have a little problem. I have a temp buffer for reading raw files, this buffer is in the main memory and...

Hi everybody! I'm trying to decode OGG vorbis on the ME processor using the mediaengine.prx that a great coder posted here. I'm facin some problems because of the malloc / free functions that ogg vorbis uses. I had some crashes at malloc_lock function I guess because malloc wasn't written to be shar...

I'll try the noreorder later, but I don't know for sure if I need to place nops after comparisions. I don't get at all what push and pop statements do, but anyway I'll give a try. The label problem I solved this way. My code has a lot of C comparisions with early out: if (dist> radius) return 0; I t...

Already done, but dead code removal seems to apply even with no optimization. Another think that GCC does is: vcmp.s ... nop bvt 0, label nop gcc changes the above code to vcmp.s ... bvt 0, label nop nop This is weird, isn't it? And is it necesary to add nop before a vcmp or i can compare and branch...

I didn't know that, none of my assembler teachers told me. The fact is that inline assembly is weird, it could be better to use pure assembly functions. Where can I find Gcc calling conventions for PSP MIPS? And how can I know the offset of each struct element? Because gcc optimizations can pack or ...

Anything is welcome! But my problem is that Gcc doesn't do well with inline assembly. Now I have: int returnvalue = 0; asm code.... bvt 0, exit_block_ c code... returnvalue = 1; exit_block_&#58; return returnvalue; This should work, as it returns a zero when jumping with the assembly code and re...

It removes too!
The problem are not the labels. The problems is that gcc removes absolutely everything after a return instruction, as it assumes I can't jump over a return.
It doesn't understand that the instruction bvt is a jump instruction!

Hi! I've got a problem with gcc. My code block: __asm__ volatile &#40; "vcmp.s GT, S000, S200\n" "bvt 0, return_block_\n" "nop\n" &#41;; ...... return 1; __asm__ __volatile__ &#40;"return_block_&#58;\n"&#41;; return 0; &#125; GCC compla...

Can I, instead of using psplink which gives me so much pain, create a prx module like exceptionHandler one with a wrapper for those functions?
Will this work?

Thanks for everything
David

Can anyone point to some app source which makes use of this at least?

Thanks again

Hi everybody! I'm having a problem with the psp hardware profiler. If I call any of these functions: pspDebugProfilerClear, pspDebugProfilerEnable, pspDebugProfilerDisable The PSP crashes with some load/store exception. I've put just a pspDebugProfilerClear which should'n give any problem (it just e...

I think this has nothing to do with the error.
The error is within the tfm and dot functions. And it's almost impossible to avoid using ulv.q function, because aligning data in the stack is quite complicated!

Hello I have a problem. I'm implementing some functions in VFPU hardware but this function: PURE_INLINE void dMULTIPLY0_331_ &#40;dReal* vout, const dReal* mat, const dReal* v&#41; &#123; __asm__ volatile &#40; "ulv.q R000, 0+ %1\n" "ulv.q R001, 16+ %1\n" "ul...

Hi all!
I've found some bugs in pspgl and solved. Do you know how to sumbit changes to svn? Who is the admin of the svn??

Thanks!