Using functions declared in xs1.h from C/C++ code

[mculibrk]

There are some nice functions declared in the XS1.H header but all of them are wrapped in the #ifdef __XC__ block so directly including xs1.h from a C/C++ file is useless.

What is the correct way to enable usage of functions declared there from a C/C++ file? To "rewrite" the header file is no problem but I suppose some library should be included in the link (or other funny things), right?
(as I found no obvious library specified in the makefiles/settings)

Any hints?

regards,
mculibrk

[lilltroll]

I wish the same, to aviod rewriting the functions as inline asm myself. It would be easier if it was maintained more central.

But until that happens, use inline asm.

[Folknology]

I presume the contents of xsi are the equiv of gcc builtins for XC.

I too would like to see these accessibly from C/C++. I have also requested to see intrinsics documentation so that we can add architectural functionality from XS1 into C which already exists in the LLVM backend, there are ways we can expose this functionality.

Still waiting on a response

regards
Al

[japus]

I needed that too for my project (have a look at the multicore embedded robot) and used a workaround.

Create a XC-file (from which you can use all XC functions and include that in your regular C file. Like this you hide all XC operations inside other operations.

A small example to send a value over a channel.

Code: Select all

void sendOverChan(chanend c, int val){
c <: val;
}

You can use chanends in C by including the <xccompat.h> header file.

If you need more examples, in my code there is a XCwrapper file wich does only this kind of stuff.

Hope it helps...

Jasper