How to maping add and multiplication calculation to FPGA logic element, not DSP unit in AOC environment

One reference example to avoid mapping MACs into the DSPs is the PipeCNN (you can find it on Github). They have wrapped their specific MAC, which is written in VHDL, into an OpenCL function. When you use this MAC function, you can see that it is only using FFs and LUTs, instead of DSPs.