If the number of multipliers in your design exceeds the number
of dedicated multipliers in the selected Stratix device, you may redirect
the mapping to other resources rather than selecting a larger device.
DSP block inferencing is turned on by default. One way to control
DSP inferencing is through the extract_mac attribute. When Precision Synthesis
comes to a MAC (multiply accumulate) function, the default is to map a
multiplier to a DSP block. If the attribute is set to FALSE then Precision
Synthesis will map it to a logic element.
Another way to control DSP inferencing is to use the dedicated_mult attribute. This attribute assigns a DSP function to a DSP block.
Another way to control DSP inferencing is to use the dedicated_mult attribute. This attribute assigns a DSP function to a DSP block.
ON maps the multiplier to a DSP block.
OFF maps the multiplier to LPMs that are implemented in LEs (Logic Elements).
LCELL maps to LEs.
AUTO is the default and maps to LPMs;Quartus chooses the implementation.
OFF maps the multiplier to LPMs that are implemented in LEs (Logic Elements).
LCELL maps to LEs.
AUTO is the default and maps to LPMs;Quartus chooses the implementation.