You can look at Nvidia PTX as well as cuda. Ptx is their macro assembler code (still higher level than machine but translated by the chip itself I think). As f

You can look at Nvidia PTX as well as cuda. Ptx is their macro assembler code (still higher level than machine but translated by the chip itself I think). As far as open sourcing the compiler, I suspect that having good documentation about what all the low-level instruction do would be as important if not more important than compiler source code. Just the compiler code wouldn't tell you why they do a given set of operation. Moreover, if a group is designing the chip and compiler together, you may wind-up with a situation where they only know the compiler stuff works, they don't know what happens if you do various other things.