flows-synthesis.md

Yosys Synthesis Flow

This flow is used to get a rough idea of the size of the core, and the length of it's critical timing paths.

It does not target an actual technology, only the internal Yosys Cell representation.

Running the flow:

make synthesise-cmos

Make sure that you have sourced bin/conf.sh to set up the workspace.

Flow outputs:

Flow results are place in work/synthesise/.

• logic-loops.rpt reports any combinatorial loops found in the design.

• synth-cmos.rpt contains longest topological path length and cell count results.

• synth.log contains the log of the entire synthesis run.

Relevant files:

• See the flow/synthesis/ directory.

• Makefile.in contains the make targets used to synthesis the core.

• synth-cmos.tcl is the script which drives Yosys to synthesis the core.