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-rw-r--r--techlibs/ice40/abc_u.box14
1 files changed, 5 insertions, 9 deletions
diff --git a/techlibs/ice40/abc_u.box b/techlibs/ice40/abc_u.box
index f44deabc4..42d666051 100644
--- a/techlibs/ice40/abc_u.box
+++ b/techlibs/ice40/abc_u.box
@@ -3,15 +3,11 @@
# NB: Inputs/Outputs must be ordered alphabetically
# (with exceptions for carry in/out)
-# Inputs: I0 I1 CI
-# Outputs: CO
+# Inputs: A B CI
+# Outputs: O CO
# (NB: carry chain input/output must be last
# input/output and have been moved there
# overriding the alphabetical ordering)
-SB_CARRY 1 1 3 1
-675 609 278
-
-# Inputs: I0 I1 I2 I3
-# Outputs: O
-SB_LUT4 2 1 4 1
-1285 1231 1205 874
+$__ICE40_FULL_ADDER 1 1 3 2
+1231 1205 874
+675 609 278