By default, the register name is based on the signal name in the RTL, plus the _reg suffix.
For example, for a signal defined as follows in VHDL and Verilog, the instance name
generated during the elaboration is
VHDL: signal wbDataForInputReg : std_logic; Verilog: reg wbDataForInputReg;
The following figure shows the schematic of the register, and its pins. It is possible to define a constraint on the register instance or its pins.
Figure 1. Single-Bit Register in Elaborated Design