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Altera_Forum
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11 years ago

Variable Precision DSP in Arria V Devices

hey folks, I am new to altera stuff. I am porting my design from xilinx devices to altera devices. In that process am facing problems with DSPs porting. I am not finding dsp in altera similar...
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Altera_Forum
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11 years ago

Finally I found solution. If we don't register multiplier output, it infers adder also into dsp.

with the following code.

wire [35:0] mul_out = ((mul_a_in[17:0]) * (mul_b_in[17:0]));

assign adder_out = $signed(add_c_in[35:0] + mul_out);

it can do (36 bit + (18 x 18)).