class就是相对于verilog更高级别的抽象,因为verilog太过关注细节,不利于验证和建模。 随着SystemVerilog中class的引入,这一切都变了。 class包括变量(类属性,properties)和子程序(类方法,methods)。 SystemVerilog中的类方法一般就是SystemVerilog task(可能消耗时间)/function(不能消耗时间)。 简言之,类属性和类方法定...
class就是相对于verilog更高级别的抽象,因为verilog太过关注细节,不利于验证和建模。 随着SystemVerilog中class的引入,这一切都变了。 class包括变量(类属性,properties)和子程序(类方法,methods)。 SystemVerilog中的类方法一般就是SystemVerilog task(可能消耗时间)/function(不能消耗时间)。 简言之,类属性和类方法定...
注2:导入函数的上下文是该函数定义所在的位置,比如$unit、模块、program或者package; 1使用格式:2import"DPI-C"context task call_sv(bit[31:0] data); 3.1.3 vcs仿真时添加编译option: +vc C/C++ source files; (1) +vc选项后面跟的源文件必须是.c后缀; (2) 注意现在如果使用+vc选项,vcs log中会报w...
Tasks and functions may be declared as automatic. Variables declared in anautomatictask, function, or block arelocal in scope, default tothe lifetime of the call or block, andare initialized on each entry to the call or block. An automatic block is one in which declarations are automatic by...
class MyTest; ... virtual task body(); // some statements pre_err_callback(); err_inj_seq(); post_err_callback(); // more statements endtask virtual task pre_err_callback(); // Empty callback endtask virtual task post_err_callback(); // Empty callback endtask endclass class ...
8 class function_calling_task; 9 10 task have_delay(); 11 begin 12 #100; 13 $display("\n",$realtime, "\tI am a task.\n"); 14 end 15 endtask 16 17 function will_call_delayed_task(); 18 begin 19 fork 20 have_delay(); // Call the task from function 21 join_none; 22...
When you declare a class in a package, the package name becomes a prefix to the class name (it could useful to isolate different class/functions/task/etc.. that have the same but serve different functions): Now there are two definitions of class A, one called P::A and the other called...
We offen call this abstract virtual class as base objects. Code : virtual class 1programclass_virtual;2// Virtual class for body of any driver3virtualclassverif;4// This starts all the threads5virtualtaskstartSim();6endtask7// This stops all the threads8virtualtaskstopSim();9endtask10//...
虽然仿真器保证了导出task的返回值,但对于导入task,DPI另一侧必须确保返回正确的值。对导入task的调用与对SV原生task的调用是无法区分的。同样,对代码中的导出task的调用与对非SV task的调用是无法区分的。如果导出的task本身是禁用的目标,则当导出task返回时,其父项导入的task不被视为处于disable状态。在这种情况下...
31.21 Class Variables31.22 Structure/Union31.23 Named Events (supersedes IEEE 1364-2001 26.6.11)31.24 Task, Function Declaration (supersedes IEEE 1364-2001 26.6.18)31.25 Alias Statement31.25.1 Examples31.26 Frames (supersedes IEEE 1364-2001 26.6.20)31.27 Threads31.28 tf call (supersedes IEEE 1364-...