> -----Ursprüngliche Nachricht----- > Von: "Eric Engler" <[EMAIL PROTECTED]> > Gesendet: 17.12.06 18:22:45 > An: [email protected] > Betreff: Re: [DotGNU] Has the CVM interprerter code been rolled into libjit?
> > > I'd like one program that can convert a file of CIL instructions to a > >file > > > of CVM instructions (this wouldn't be platform specific). > > >The cvm interpreter is not tied to libjit. It's an either jit or cvm. The > >CIL instructions > >depend much on the metadata in the CIL files and so does the generated > >code. > >The tool would have to create a file with all the metadata in the CIL file > >and only the instruction streams replaced by cvm code. > > Ok, I think I understand now. This task seems like it must be close to the > JVM bytecode generation option, which also has to wrap up the metadata and > generate an instruction stream suitable for interpretation? > right > How does the CVM stream compare to a bytecode stream in terms of suitability > to be interpreted? > The cvm bytecode is optimized for interptation with help of the verifier. To interpret the il bytecode a lot checks would have to be done at runtime to handle different cases which is allready done using the cvm bytecode. > Perhaps the question of CVM vs. Bytecode should hinge on which set of libs > are the most suitable? > > Since the PNET libs are written in C, instead of C#, the connection between > the interpreter and the libs is made at the native code level, instead of > the IL level, so this may present a more efficient runtime. A lib written in > C# and compiled to IL has to be interpreted at runtime (assuming no JIT), > along with the user code, thereby causing slower execution speed. > The runtime libs are a mixture of native functions and methods implemented in IL. In fact only a small part handling very basic tasks are done in C. > A Java set of libs is probably similar to the IL model where the libs exist > as bytecode that must be interpreted at runtime. Klaus _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066 _______________________________________________ Developers mailing list [email protected] http://dotgnu.org/mailman/listinfo/developers
