------------- normal 3T ---------------

yosys> stat -liberty ./nem_liberty/nem_basic_yosys.lib

14. Printing statistics.

=== c880_nem ===

   Number of wires:                328
   Number of wire bits:            328
   Number of public wires:          86
   Number of public wire bits:      86
   Number of ports:                 86
   Number of port bits:             86
   Number of memories:               0
   Number of memory bits:            0
   Number of processes:              0
   Number of cells:                268
     and_3T                         30
     inv_3T                         14
     nand_3T                       119
     nor_3T                         77
     or_3T                           2
     xnor_3T                        13
     xor_3T                         13

   Chip area for module '\c880_nem': 900000.000000
     of which used for sequential elements: 0.000000 (0.00%)

------------- 4T ---------------

yosys> stat -liberty ./nem_liberty/nem_basic_yosys_extended.lib

14. Printing statistics.

=== c880_nem ===

   Number of wires:                316
   Number of wire bits:            316
   Number of public wires:          86
   Number of public wire bits:      86
   Number of ports:                 86
   Number of port bits:             86
   Number of memories:               0
   Number of memory bits:            0
   Number of processes:              0
   Number of cells:                256
     and_4T                        120
     and_not_4T                     13
     inv_3T                          2
     nand_4T                         1
     or_4T                          82
     or_not_4T                       5
     xnor_4T                        12
     xor_4T                         21

   Chip area for module '\c880_nem': 368912.000000
     of which used for sequential elements: 0.000000 (0.00%)

------------- Muxig ---------------
------------- Stats ---------------
Area 3T: 900000.000000
Area 4T: 368912.000000
Ratio 4T->3T: .40990222222222222222%
Area MUX: 
Ratio MUX->3T: %