From 2358320f5168edd691882bba0f759d82308291d6 Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Tue, 31 Dec 2019 18:29:37 -0800 Subject: Cleanup ice40 boxes --- techlibs/ice40/abc9_u.box | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) (limited to 'techlibs/ice40/abc9_u.box') diff --git a/techlibs/ice40/abc9_u.box b/techlibs/ice40/abc9_u.box index f00e247b8..48a51463e 100644 --- a/techlibs/ice40/abc9_u.box +++ b/techlibs/ice40/abc9_u.box @@ -1,13 +1,18 @@ # From https://github.com/cliffordwolf/icestorm/blob/be0bca0/icefuzz/timings_up5k.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 -1231 1205 1285 874 874 -675 609 - - 278 +# Box 1 : $__ICE40_CARRY_WRAPPER (private cell used to preserve +# SB_LUT4+SB_CARRY) +# Outputs: O, CO +# (Exception: carry chain input/output must be the +# last input and output and the entire bus has been +# moved there overriding the otherwise +# alphabetical ordering) +# name ID w/b ins outs +$__ICE40_CARRY_WRAPPER 1 1 5 2 +#A B I0 I3 CI +1231 1205 1285 874 874 # O +675 609 - - 278 # CO -- cgit v1.2.3