Re: Best video card/driver for shading supprot



Wolfgang Draxinger <wdraxinger@xxxxxxxxxxxxxxxx> writes:

> fungus wrote:
>
> >
> http://www.delphi3d.net/hardware/extsupport.php?extension=GL_ARB_shading_language_100
> >
> > A 9800 can do it no problem, but I'm not sure
> > it's the "best".
>
> However only limited (no loops and conditional code).

I have one it works most often, the drivers have been alot better the
last years, but programming it is problematic due to "no loops and
conditional code" in hardware and a restricted number of instructions
means that the code will be unrolled and the number of instructions
will be to large and software emulated.

Stuff like noise3() can't be used, it's a pain and I'm thinking of buying
a new one, Nvidia seems to have catched up the performance.

Do the newer ATI cards have branching and loops?

/Dan
.



Relevant Pages

  • Re: "Mastering C Pointers"....
    ... > Memory is just a big array of bytes again. ... > (If you're not totally familiar with loops in general, ... My point was that for and while loops compile down to ... > organize this enormous stream of instructions ...
    (comp.lang.c)
  • Re: randomized white noise = white noise?
    ... due to 4 brne and 16 ldd 2-cycle instructions) but still is fast ... 20 MHz would give about 125000 loops per second max. ...
    (sci.electronics.design)
  • Re: Please help me understand my code
    ... It just happens to often be used with loops (at least ... "CONTINUE is a dummy statement which gives rise to no instructions ... number that can be referred to in transfers which are desired ... to become, in the object program, transfers to the indexing ...
    (comp.lang.fortran)
  • Re: Loading single word to a xmm register
    ... and consequently allows alot more parrallelism in numeric ... loops. ... they give you alot better control of how the memory ... as well as provide special prefetch instructions ...
    (alt.lang.asm)