| # From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_hx8k.txt | |
| # NB: Inputs/Outputs must be ordered alphabetically | |
| # (with exceptions for carry in/out) | |
| # Inputs: A B I0 I3 CI | |
| # Outputs: O CO | |
| # (NB: carry chain input/output must be last | |
| # input/output and have been moved there | |
| # overriding the alphabetical ordering) | |
| $__ICE40_CARRY_WRAPPER 1 1 5 2 | |
| 400 379 449 316 316 | |
| 259 231 - - 126 |