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

# NB: Box inputs/outputs must each be in the same order
#     as their corresponding module definition
#     (with exceptions detailed below)

# Box 1 : $__ICE40_CARRY_WRAPPER (private cell used to preserve
#                                 SB_LUT4+SB_CARRY)
#   (Exception: carry chain input/output must be the
#        last input and output and the entire bus has been
#        moved there overriding the otherwise
#        alphabetical ordering)
# name                 ID  w/b ins outs
$__ICE40_CARRY_WRAPPER 1   1   5   2
#A  B   I0  I3  CI
400 379 449 316 316 # O
259 231 -   -   126 # CO