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-rw-r--r--techlibs/ecp5/abc_5g.box5
-rw-r--r--techlibs/xilinx/abc_xc7.box5
2 files changed, 6 insertions, 4 deletions
diff --git a/techlibs/ecp5/abc_5g.box b/techlibs/ecp5/abc_5g.box
index 15e26b5d5..5309aca87 100644
--- a/techlibs/ecp5/abc_5g.box
+++ b/techlibs/ecp5/abc_5g.box
@@ -4,8 +4,9 @@
# Box 1 : CCU2C (2xCARRY + 2xLUT4)
# Outputs: S0, S1, COUT
# (NB: carry chain input/output must be last
-# input/output and have been moved there
-# overriding the alphabetical ordering)
+# input/output and bus has been moved
+# there overriding the otherwise
+# alphabetical ordering)
# name ID w/b ins outs
CCU2C 1 1 9 3
diff --git a/techlibs/xilinx/abc_xc7.box b/techlibs/xilinx/abc_xc7.box
index 96966a71c..6dd71d758 100644
--- a/techlibs/xilinx/abc_xc7.box
+++ b/techlibs/xilinx/abc_xc7.box
@@ -18,8 +18,9 @@ MUXF8 2 1 3 1
# Inputs: CYINIT DI0 DI1 DI2 DI3 S0 S1 S2 S3 CI
# Outputs: O0 O1 O2 O3 CO0 CO1 CO2 CO3
# (NB: carry chain input/output must be last
-# input/output and have been moved there
-# overriding the alphabetical ordering)
+# input/output and the entire bus has been
+# moved there overriding the otherwise
+# alphabetical ordering)
CARRY4 3 1 10 8
482 - - - - 223 - - - 222
598 407 - - - 400 205 - - 334