diff options
| author | Eddie Hung <eddie@fpgeh.com> | 2019-12-31 18:29:37 -0800 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-12-31 18:29:37 -0800 |
| commit | 2358320f5168edd691882bba0f759d82308291d6 (patch) | |
| tree | 13969f24cfa0003abf7da17b9180ca114cf2d123 /techlibs/ice40/abc9_u.box | |
| parent | b2046a2114add3d24c0affd9d885b7ee320dba27 (diff) | |
| download | yosys-2358320f5168edd691882bba0f759d82308291d6.tar.gz yosys-2358320f5168edd691882bba0f759d82308291d6.tar.bz2 yosys-2358320f5168edd691882bba0f759d82308291d6.zip | |
Cleanup ice40 boxes
Diffstat (limited to 'techlibs/ice40/abc9_u.box')
| -rw-r--r-- | techlibs/ice40/abc9_u.box | 25 |
1 files changed, 15 insertions, 10 deletions
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 |