# From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_hx8k.txt

# NB: Inputs/Outputs must be ordered alphabetically

# Inputs: CI I0 I1
# Outputs: CO
SB_CARRY 1 1 3 1
126 259 231

# Inputs: I0 I1 I2 I3
# Outputs: O
SB_LUT4 2 0 4 1
449 400 379 316