What is the difference between blocking and nonblocking statements in verilog

In verilog, we have two types of assignment operators i.e. blocking (=) and non- blocking (<=). These two have theirs special usages – Here are the differences

1. behavior  –

The blocking statements are as similar as any sequential programming language. In short, they execute sequentially.

The non-blocking statements are executed concurrently; it means if five statements are written together then it would depend on the simulator to execute which statement first. Ideally all the statements should execute at the same time.

1. Synthesis –

The blocking statements infer simple “connection OR wire” during the synthesis,

Non-blocking statements infer Flop/latch.

1. Usage -

The blocking statements are used normally for combinational logic implementation OR whenever the synchronization/sequence required between the assignments,

Non blocking statements are used for sequential implementation