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19.6 Defining cross coverage....................................................................................................... 569
19.7 Specifying coverage options................................................................................................578
19.8 Predefined coverage methods .............................................................................................. 582
19.9 Predefined coverage system tasks and system functions..................................................... 585
19.10 Organization of option and type_option members .............................................................. 585
19.11 Coverage computation ......................................................................................................... 586
20. Utility system tasks and system functions ...................................................................................... 591
20.1 General................................................................................................................................. 591
20.2 Simulation control system tasks .......................................................................................... 592
20.3 Simulation time system functions........................................................................................ 592
20.4 Timescale system tasks........................................................................................................ 594
20.5 Conversion functions ........................................................................................................... 597
20.6 Data query functions............................................................................................................ 598
20.7 Array query functions .......................................................................................................... 600
20.8 Math functions ..................................................................................................................... 603
20.9 Bit vector system functions.................................................................................................. 604
20.10 Severity tasks ....................................................................................................................... 605
20.11 Elaboration system tasks...................................................................................................... 606
20.12 Assertion control system tasks............................................................................................. 608
20.13 Sampled value system functions.......................................................................................... 614
20.14 Coverage system functions .................................................................................................. 615
20.15 Probabilistic distribution functions......................................................................................615
20.16 Stochastic analysis tasks and functions ............................................................................... 617
20.17 Programmable logic array modeling system tasks .............................................................. 619
20.18 Miscellaneous tasks and functions....................................................................................... 623
21. Input/output system tasks and system functions.............................................................................624
21.1 General................................................................................................................................. 624
21.2 Display system tasks............................................................................................................ 624
21.3 File input/output system tasks and system functions........................................................... 635
21.4 Loading memory array data from a file ............................................................................... 645
21.5 Writing memory array data to a file..................................................................................... 649
21.6 Command line input............................................................................................................. 650
21.7 Value change dump (VCD) files ......................................................................................... 653
22. Compiler directives......................................................................................................................... 674
22.1 General.....................................................................................................................
...
......... 674
22.2 Overview ............................................................................................................................. 674
22.3 `resetall................................................................................................................................. 674
22.4 `include ................................................................................................................................ 675
22.5 `define, `undef, and `undefineall .........................................................................................675
22.6 `ifdef, `else, `elsif, `endif, `ifndef ........................................................................................ 681
22.7 `timescale............................................................................................................................. 684
22.8 `default_nettype ................................................................................................................... 685
22.9 `unconnected_drive and `nounconnected_drive .................................................................. 686
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