Where's the function list and instructions

_EINT() is an intrinsic function.  Intrinsics are essentially compiler-specific directives usually used for optimization purposes or readability.  You can find the list of intrinisic functions that CCE supports by searching "intrinsic functions" in the CCE help.  They are also listed in <intrinsics.h> - you'll notice that _EINT() is not in intrinsic.h because it's an IAR-specific directive (another very widely used MSP430 IDE).  The file <in430.h> maps the IAR intrinsic functions to CCE intrinsic functions for those more accustomed to IAR.

Just FYI, this is how I find .h files with ease.  For instance, if I wanted to look at in430.h, I would type " #include <in430.h> " in my code.  Then save the file.  Then look at the outline view (Window -> Show View -> Outline), I think the window is placed on the right by default.  Double click the in430.h in the outline view and the source code should come up.