"TMS320C55x DSP Library DSPLIB Programmer's Reference"

iirlatBenchmarks(preliminary)Cycles † Core: nx * (5 + 8 * nbiq)Overhead: 68Code size(in bytes)154† Assumes all data is in on-chip dual-access RAM and that there is no bus conflict due to twiddletable reads and instruction fetches (provided linker command file reflects those conditions).iirlatFunctionLattice Inverse (IIR) Filterushort oflag = iirlat (DATA *x, DATA *h, DATA *r, DATA *pbuffer, int nx, int nh)Argumentsx [nx]h[nh]r[nx]Pointer to real input vector of nx real elements in normalorder:x[0]x[1]..x[nx–2]x[nx–1]Pointer to lattice coefficient vector of size nh in normalorder with the first element zero-padded:0h[0]h[1]..h[nh–2]h[nh–1]Pointer to output vector of nx real elements. In-placecomputation (r = x) is allowed.r[0]r[1]..r[nx–2]r[nx–1]Function Descriptions4-61