Implement missing PTX instruction in ZLUDA for 32 bit PhysX

[vosen]

Expected outcome:
We can parse every instruction in 32 bit PhysX PTX. We won't be able to compile because some implicit conversions will fail.

Comments:

• We should already support all instructions used by PhysX with the excpetion of tex. and texref data type. Implementing those two should be enough. tex. can load from a texref object or a 64 bit integer. We should either support only 64 bit integer and add implicit conversion from texref to 64 bit handle or support texrefs and 64 bit through two separate instructions and figure out which variant it is in a compiler pass. Old ZLUDA used to do the former for rerasons I don't remember anymore