A - S3L array handle describing a parallel array of size ma (1D case) or ma x na (2D) case. A contains the input signal that will be convolved.
B - S3L array handle describing a parallel array that contains the convolution filter.
C - S3L array handle describing a parallel array in which the convolved signal is stored. Its length must be at least ma+mb-1 (1D case) or ma+mb-1 x na+nb-1 (2D case).