Optimize Neon™ SUB operator by squashing execution window

Resolves: COMPMID-5462
Change-Id: I2c7151c8faf4016cc33592fff04d492d7cbc8fd6
Signed-off-by: Jakub Sujak <jakub.sujak@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/8366
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gunes Bayir <gunes.bayir@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/cpu/operators/CpuSub.h b/src/cpu/operators/CpuSub.h
index 025c928..d463d1e 100644
--- a/src/cpu/operators/CpuSub.h
+++ b/src/cpu/operators/CpuSub.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Arm Limited.
+ * Copyright (c) 2021-2022 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -60,6 +60,9 @@
      * @return a status
      */
     static Status validate(const ITensorInfo *src0, const ITensorInfo *src1, const ITensorInfo *dst, ConvertPolicy policy, const ActivationLayerInfo &act_info = ActivationLayerInfo());
+
+    // Inherited methods overridden:
+    void run(ITensorPack &tensors) override;
 };
 } // namespace cpu
 } // namespace arm_compute