Draft: Prasadar/multi precision

[FrancescoConti]

This pull request introduces support for asymmetric stream data widths and improves parameterization and flexibility across several HWPE-Stream modules. The main changes include the addition of a new module for handling asymmetric stream fencing, updates to existing modules to generalize element widths, and the introduction of a new address generator version. These changes enhance the configurability and capability of the HWPE-Stream infrastructure.

New module and interface enhancements:

• Added new hwpe_stream_fence_asymmetric module to support synchronization between streams of different data widths, facilitating the joining of asymmetric streams. (rtl/basic/hwpe_stream_fence_asymmetric.sv, Bender.yml) [1] [2]
• Updated hwpe_stream_intf_tcdm and hwpe_stream_intf_stream interfaces to include ELEMENT_WIDTH and to generalize STRB_WIDTH calculation, allowing support for arbitrary data and element widths. (rtl/hwpe_stream_interfaces.sv) [1] [2] [3]

Module parameterization and flexibility:

• Modified hwpe_stream_serialize and hwpe_stream_fifo modules to use ELEMENT_WIDTH for calculating strobe widths, improving support for streams with non-byte-sized elements, and added new operational modes and logic for stream/contiguous element handling. (rtl/basic/hwpe_stream_serialize.sv, rtl/fifo/hwpe_stream_fifo.sv) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

Address generator improvements:

• Added a new hwpe_stream_addressgen_v4 module and corresponding control and flag structs to support more advanced address generation patterns. (Bender.yml, rtl/hwpe_stream_package.sv) [1] [2] [3]

These updates collectively make the HWPE-Stream platform more adaptable to a wider range of data widths and memory access patterns, improving its utility for heterogeneous and high-performance streaming applications.