vector_add example - Not using DSP blocks

Hello Everyone,

I am trying to analyze the resource usage of opencl "vector_add.cl" example.

aoc -c vector_add.cl -report

+--------------------------------------------------------------------+

; Estimated Resource Usage Summary ;

+----------------------------------------+---------------------------+

; Resource + Usage ;

+----------------------------------------+---------------------------+

; Logic utilization ; 17% ;

; ALUTs ; 12% ;

; Dedicated logic registers ; 7% ;

; Memory blocks ; 12% ;

; DSP blocks ; 0% ;

+----------------------------------------+---------------------------;

From this report, it is not using any of the DSP blocks available in FPGA. How to use DSP blocks?

Thanks

Pavan