Pure and Context Tasks and Functions SystemVerilog DPI

1 pure , context tasks , functions

1.1 pure functions

1.1.1 properties of pure functions


1.2 context tasks , functions

1.2.1 properties of context tasks , functions

pure , context tasks , functions
pure functions

a function results solely depends on value of input arguments no side effects called pure function.

properties of pure functions


an imported task can never declared pure.

context tasks , functions

an imported task or function calls exported tasks or functions or accesses systemverilog data objects other actual arguments called context task or function.

properties of context tasks , functions

1) context imported task or function can access (read or write) systemverilog data object calling (pli/vpi) or calling export task or function. therefore, call context task or function barrier systemverilog compiler optimization.