Maximum ammount of local variables in cg shaders ?
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From: Skybuck Flying on 24 Oct 2009 01:00 Hello, I have a few questions about local variables in cg shaders... I read arb_fragment_program and arb_fragment_program2 specification which is about the assembly side of things... There seem to be about 64 temporarely registers available or so... However so far it seems it's possible to use many more local variables in cg/cgfx shaders ? For now I wonder what will happen if there are for example 1000 local variables in a shader all "active" at the same time ? Is this possible ? If so how is it implemented ? Does the gpu have some kind of stack where excessive temporarely variables are pushed onto, and popped off as needed ? Or is there simply some kind of "temporarely variable limitation in cg shaders" ? So far I have already noticed one limitation: loop indexes only go to 4096... Bye, Skybuck. |