The NoC primitives are missing cocotb tests. Old code by @wallento is available at imphil/optimsoc@32162b1 and can potentially be used as starting point.

Description

We should introduce a global clock error for improving accuracy of timing statistics. Overall, the idea is to make the following code global:

t1 = clock_read();
t2 = clock_read();

clock_error = (t2 - t1);

References

https://github.com/nanvix/microkernel/blob/deb1ebe3b5e94b49eac87997b5d93f902348b5af/src/kernel/noc/active.c#L1055

Interface

We are not using the nodes interface, thus we should drop it.

Description

Currently, to signal errors, some functions return a negative error code and others return -1 and set the errno variable to indicate the error.

We should rely on one and only one approach to signal the errors, otherwise caos will follow.

Therefore, we should gradually fix the code to signal errors through the errno variable, since it is the standard for Unix systems.

Description

We should support several flavors for software division, such as unsigned division long long division, and so on.

Complete the following lists with missing operations

32-bit Integer

• long division
• long module
• unsigned long division
• unsigned long module

64-bit Integer

• long long division
• long long module