- Registers are inferred and reported during HDL synthesis.
- The number of Registers inferred during HDL synthesis might not precisely equal the number of Flip-Flop primitives in the Design Summary section.
- The number of Flip-Flop primitives depends on the following processes:
- Absorption of Registers into DSP blocks or block RAM components
- Register duplication
- Removal of constant or equivalent Flip-Flops