Add comment to xc7 box

2019-06-22 14:28:24 -07:00 · 2019-06-22 14:28:24 -07:00 · 792d0670c3
parent 63182ed57d
commit 792d0670c3
1 changed files with 3 additions and 0 deletions
--- a/techlibs/xilinx/abc_xc7.box
+++ b/techlibs/xilinx/abc_xc7.box
@ -1,5 +1,8 @@
 # Max delays from https://github.com/SymbiFlow/prjxray-db/blob/34ea6eb08a63d21ec16264ad37a0a7b142ff6031/artix7/timings/CLBLL_L.sdf

+# NB: Inputs/Outputs must be ordered alphabetically
+#     (with exceptions for carry in/out)
+
 # F7BMUX slower than F7AMUX
 # Inputs: I0 I1 S0
 # Outputs: O