A convolutional accelerator (112) includes a feature line buffer, a kernel buffer, a multiply-accumulate cluster, and iteration control circuitry (114). The convolutional accelerator (112), in operation, convolves a kernel with a streaming feature data tensor. The convolving includes decomposing the kernel into a plurality of sub-kernels and iteratively convolving the sub-kernels with respective sub-tensors of the streamed feature data tensor. The iteration control circuitry (114), in operation, defines respective windows of the streamed feature data tensors, the windows corresponding to the sub-tensors.