"TMS320C55x DSP Library DSPLIB Programmer's Reference"

convolCIFFT – NOSCALEFFT Size Cycles † Code Size (in bytes)8 139 32516 246 32532 477 32564 996 325128 2171 325256 4818 325512 10729 3251024 23808 325† 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).convolFunctionConvolutionushort oflag = convol (DATA *x, DATA *h, DATA *r, ushort nr, ushort nh)Argumentsx[nr+nh–1]h[nh]r[nr]Pointer to input vector of nr + nh – 1 real elements.Pointer to input vector of nh real elements.Pointer to output vector of nr real elements.nrNumber of elements in vector r. In-place computation(r = x) is allowed (see Description section for comment).nh Number of elements in vector h.oflagOverflow error flag (returned value) If oflag = 1, a 32-bit data overflow occurred in an intermediateor final result.If oflag = 0, a 32-bit overflow has not occurred.Function Descriptions4-23