SystemVerilog is the successor language to Verilog. Originally created by Accellera as an extension language to Verilog IEEE Std 1364-2001, SystemVerilog was accepted as an IEEE standard in 2005. In 2009, IEEE merged Verilog (IEEE 1364) into SystemVerilog (IEEE 1800) as a unified language. Like its predecessor, SystemVerilog is supported by many FPGA (Field Programmable Gate Array) vendors and ASIC (Application Specific Integrated Circuit) tool vendors. SystemVerilog was created to enhance HDL design development and has dedicated features for verification.
SystemVerilog consists of 3 main sub-languages:
Design directives : Allows designers to write RTL more concise, explicit, and flags mistakes traditionally not found until synthesis.
Assertions : Used for verification and coverage of protocols and internal sequential signals.