AI Engine APIs provide access methods to
read and write data from data memory, streaming data ports, and cascade streaming
ports which can be used by AI Engine kernels. For
additional details on the window and stream APIs, see Window and Streaming Data API in the
AI
Engine Tools and Flows User Guide (UG1076). In the following
example, the window readincr (window_readincr_v<8>(din)) API is used to read a
window of complex int16 data into the data vector. Similarly, readincr_v<8>(cin) is used to read a sample of
int16 data from the cin stream. writeincr(cas_out, v) is used to write data to a
cascade stream output.
void func(input_window<cint16> *din,
input_stream<int16> *cin,
output_stream<cacc48> *cas_out){
aie::vector<cint16,8> data=window_readincr_v<8>(din);
aie::vector<int16,8> coef=readincr_v<8>(cin);
aie::accum<cacc48,4> v;
…
writeincr(cas_out, v);
}