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AR# 55196: Vivado Synthesis - What features are not supported for DSP48 inference?
Vivado Synthesis - What features are not supported for DSP48 inference?
This answer record explains the features that are currently not supported by Vivado Synthesis for DSP48 inference.
The following features are not supported by Vivado Synthesis during DSP48 inference:
A SIMD mode that allows users to do multiple parallel operations which are to be inferred into one DSP48 slice.
Inferring Incremental count values greater than 1 (such as 2,3,4) into a DSP48 primitive. Currently, incremental count by 1 does get inferred into a DSP48 primitive. This problem is fixed in the 2014.3 release.