diff options
Diffstat (limited to 'techlibs/ice40/abc9_lp.box')
| -rw-r--r-- | techlibs/ice40/abc9_lp.box | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/techlibs/ice40/abc9_lp.box b/techlibs/ice40/abc9_lp.box index 473e92fe9..71986a67b 100644 --- a/techlibs/ice40/abc9_lp.box +++ b/techlibs/ice40/abc9_lp.box @@ -1,13 +1,17 @@ # From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_lp8k.txt -# NB: Inputs/Outputs must be ordered alphabetically -# (with exceptions for carry in/out) +# NB: Box inputs/outputs must each be in the same order +# as their corresponding module definition +# (with exceptions detailed below) -# 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 -589 558 661 465 465 -675 609 - - 186 +# 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 +589 558 661 465 465 # O +675 609 - - 186 # CO |