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Altera_Forum
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11 years ago

Multiplication by constant

Hi all. Just found out that Quartus does not instantiate hard block multiplier if multiplication is done by a constant. Even if i define multstyle = "dsp", why?
Altera_Forum's avatar
Altera_Forum
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11 years ago

If the constant value is 2^n, then the result is simply a bitshift.

Similarly, if it has just a couple of bits set, it may be easier just to create an adder.