From 458a208c44f70a9848f1e8e2e91f28ce3641c48f Mon Sep 17 00:00:00 2001 From: Patrik Gustavsson Date: Thu, 13 Aug 2020 13:41:05 +0200 Subject: MLBEDSW-2570 Avoid usage of NHCWB16 for some cases Avoid usage of NHCWB16 when Stack/Pack/Concat is performed in axis 3, and the "concat start" of each slice to be combined is not a multiple of 16. Signed-off-by: Patrik Gustavsson Change-Id: If3f7b4a3424be3c86fc2dc48e8649ce4c4f49485 --- ethosu/vela/graph_optimiser.py | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'ethosu/vela/graph_optimiser.py') diff --git a/ethosu/vela/graph_optimiser.py b/ethosu/vela/graph_optimiser.py index 582924c4..3fe703e1 100644 --- a/ethosu/vela/graph_optimiser.py +++ b/ethosu/vela/graph_optimiser.py @@ -69,6 +69,16 @@ def rewrite_concat(tens, arch): tens.ops.append(new_op) assert tens.shape[axis] == offset + # If axis = 3, NHCWB16 can only be used in the output if all the concat_start's are a multiple of 16, + # 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 == 3: + for op in tens.ops: + if op.attrs["concat_start"] % 16 != 0: + tens.avoid_NHCWB16 = True + break + return tens -- cgit v1.2.1