gemmini

This is an incremental release:

• Support for rectangular convolutions
• New Timeloop configurations included in repo
• Area improvements for runtime-configurable dataflows
• Faster build and elaboration times

• Add support for I-BERT, including its I-GELU, layernorm, and softmax variants
• Add new parallelized profiling and data collection scripts
• Support for Chipyard 1.8
• Miscellaneous area, power, perf, and functionality improvements, as well as bug fixes

New features:

• Add support for new "dummy configs" which give cycle-accurate performance results, but which don't guarantee functional correctness of matmul/conv operations
• Optimize area for reservation stations by splitting unified reservation station into separate stations for each instruction type

Bug fixes:

• Fix incorrect assertions from firing when building some non-systolic configs...

• Bump to Chisel 3.5
• Fix bug with depthwise convolutions

• Disable on-demand paging for proxy-kernel workloads, because on-demand paging doesn't work well with large binaries
• Fix compilation errors for large floating-point configs