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-rw-r--r--ethosu/vela/graph_optimiser.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/ethosu/vela/graph_optimiser.py b/ethosu/vela/graph_optimiser.py
index f6b03f67..e5fbc25f 100644
--- a/ethosu/vela/graph_optimiser.py
+++ b/ethosu/vela/graph_optimiser.py
@@ -103,7 +103,7 @@ def rewrite_concat(tens, arch):
# multiple of 16. This as, it is only then the address offset for the ofm, for all operations, will be 16 byte
# aligned. For other values of axis the address offsets will be 16 byte aligned, as they are all based on c = 0
# and those addresses are always 16 byte aligned due to the NHCWB16 format.
- if axis == (len(tens.shape) - 1):
+ if axis == -1 or axis == (len(tens.shape) - 1):
for op in tens.ops:
if op.attrs["concat_start"] % 16 != 0:
tens.avoid_NHCWB16 = True