Add support for vector floating-point division and square-root instructions

[mp-17]

Currently, Ara supports the most important FP operations to run a matmul kernel. All the other vector floating-point instructions still need to be added.

Note: Some of them, namely:

• vfclass
• vfdiv
• vfsqrt

are not implemented due to issues with the FPU (fpnew) when operating in vectorial (SIMD) mode. Once these problems are solved, the corresponding instructions will be added as well.

[suehtamacv]

Is there a corresponding issue in the fpnew repo? As far as I know, this is not an issue with Ara, but rather on how the fpnew handles the vector execution of those instructions.

[mp-17]

This is a reference to the synch issue that affects vfdiv in fpnew: https://github.com/pulp-platform/fpnew/issues/45 We will add the new issue for vfclass soon; I have opened an issue here as well just as a reminder, as the implementation of these instructions in Ara is stalled by the issues in fpnew

[Xavier2979]

Currently, Ara supports the most important FP operations to run a matmul kernel. All the other vector floating-point instructions still need to be added.

Note: Some of them, namely:

• vfclass
• vfdiv
• vfsqrt

are not implemented due to issues with the FPU (fpnew) when operating in vectorial (SIMD) mode. Once these problems are solved, the corresponding instructions will be added as well.

[mp-17]

Due to a delay in updating the FPU, these instructions were delayed as well. We are merging them now with PR https://github.com/pulp-platform/ara/pull/100.