[1/3] wined3d: Constant load optimisations

[Stefan Dösinger]

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Am 20.08.2011 um 22:28 schrieb Henri Verbeet:

> On 20 August 2011 18:46, Norbert Lataille <nlataill at gmail.com> wrote:
>> Performance gains (for parts 1/2/3) on WoW:
>> http://norbert.lataille.free.fr/constants.html
>> Results for 3dmark06, X3: http://norbert.lataille.free.fr/perf.html
>> (line: Constants).
>> 
> Do you have those in a reasonable format as well?
The graphs are nice to click through them, but the plain numbers would be nice too. The difference looks roughly like the GLSL-ARB shader performance difference.

My impression was that the drivers already set unused constants to -1. Sure, we declare all 256 constants, but unless indirect addressing is used the driver eliminates those that aren't read. Unfortunately I don't know which driver I used to test that, maybe it was OSX.
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