Added

• Hardware support for:
  • Vector slide instructions (vslideup, vslide1up, vfslide1up, vslidedown, vslide1down, vfslide1down)
• Software implementation of a integer 2D convolution kernel
• CI job to check the conv2d execution on Ara

Fixed

• Removed dependency to a specific gcc g++ version in Makefile
• Arithmetic and memory vector instructions with vl == 0 are considered as a NOP
• Increment bit width of the vector length type (vlen_t), accounting for vectors whose length is VLMAX
• Fix vector length calculation for the MaskB operand, which depends on vsew
• Fix typo on the vrf_pnt updating logic at the Mask Unit
• Update README to highlight dependency with Spike
• Update Bender's link dependency to the public CVA6 repository
• Retrigger the compile module if the ModelSim compilation did not succeed

Changed

• The encoding.h in the common Ara runtime is now a copy from the encoding.h in the Spike submodule