Re: [AD] Patch for performance issues in i386 blitters

[Robert J Ohannessian <ohannessian@xxxxxxxxxx>]

Eric Botcazou wrote:
> A consistent 0% change for me, both under DOS and Linux. I guess my gfx card
> is the bottleneck on my system!

Or the bus speed (PCI?).

> An interesting thing: the following modification
>
> -   movw BMP_SEG(%edx), %es       /* select segment */
> +   movl BMP_SEG(%edx), %es       /* select segment */
>
> doesn't actually save any byte, because GAS is smart enough to automatically
> convert the former into the latter.


Cool.


> Bob, if you're still ok with it, I think you can commit the patch.

I'll do it some time this week (unless you get to it first).
I also wanted to add some code to check if the source or dest bitmaps 
are memory bitmaps, and thus we can save the calls to READ|WRITE_BANK 
altogether.