Add fwft-fifo info to readme

README.md

@@ -24,8 +24,11 @@ A simple counter design in VHDL. The testbench contains various simple propertie
 ### fifo
 A simple synchronous FIFO with various checks for write/read pointers, data and flags.
 
+### fwft_fifo
+A simple synchronous FIFO with first-word fall-through behaviour. Uses fifo as sub-unit. This design serves as an example how to verify designs with sub-units containing formal checks.
+
 ### vai_fifo
-A simple FIFO with valid-accept-interface. Consists of fifo as sub-unit and some glue logic doing fifo<->vai interface conversion. This design serves as an example how to verify designs with sub-units containing formal checks.
+A simple FIFO with valid-accept interface. Consists of fwft_fifo as sub-unit and some glue logic doing fifo<->vai interface conversion. This design serves as an example how to verify designs with sub-units containing formal checks.
 
 ### vai_reg
-A simple register file with VAI (valid-accept-interface) which serves as test design to try formal verification of FSMs.
+A simple register file with VAI (valid-accept interface) which serves as test design to try formal verification of FSMs.