taskmain();// fork join_any block1fork #5$display("THREAD 1 %0t",$time);#25$display("THREAD 2 %0t",$time);join_anydev_state();$display("After task call %0t",$time);#100$finish;endtask taskdev_state();// fork joi
除了常见的module、interface、class、task以及function等等,另外,begin-endblock和fork-joinblock也是一个scope(这里的fork-joinblock包括fork-join、fork-join_any和fork-join_none),如下示例,在匿名块中也可以声明变量,该变量只在当前匿名块或者其内部嵌套的scope中是可见的: `timescale1ns/1nsmoduletest;inta =1;...
function不能具有时间控制语句,如@#fork joinwait function无法启动task,因为允许task消耗模拟时间。 ANSI-C style declaration moduletb;// There are two ways to call the function:initialbegin// 1. Call function and assign value to a variable, and then use variableints = sum(3,4);$display("sum(...
Function & Task Function cannot have timing event (time-controlled statements like @, #, fork join or wait) and cannot call a task since tasks are allowed to consume simulation time in SystemVerilog. Latest changes have allowed functions to use fork…join and use timing event inside fork bloc...
、fork-join_any、wait、wait_order 或 expect 的语句。 无论任务是否包含时间控制语句,函数都不得启用这些任务。 函数可以启用 细粒度 进程控制方法来暂停自身或其它进程。 声明示例: function logic [15:0] myfunc1(int x, int y); endfunction function logic [15:0] myfunc2; input int x; input int...
变量在module、program、interface、checker内,且在task、function、process外定义:static lifetime 变量在static task、static function、block内定义:default static lifetime 变量在static task、static function、block内定义,但变量加上automatic修饰符:lifetime of the call or block(随用随生成) 变量在automatic task...
...line17和line19~line23分别定义了SystemVerilog function,前缀sv_指明这是SystemVerilog语言编写的function line25~line29定义了SystemVerilog...task,前缀sv_指明这是SystemVerilog语言编写的task。...line31~line33是SystemVerilog DPI的关键,使用关键字“export”使指定的function或task对于C语言可见,并且其名称...
A function cannot be time consuming and hence cannot call a task. In verilog it was never possible to call a time cosuming task from a function. But this problem is solved in SystemVerilog and a function can call task with the use of *fork joinnone* (A system verilog ...
9.6 fork...join9.7 进程执行线程9.8 进程控制9.8.1 wait fork9.8.2 disable fork9.9 精细的进程控制第十章 任务与函数10.1 简介(一般信息)10.2 任务10.3 函数10.3.1 返回值与void函数10.3.2 丢弃函数返回值10.4 任务与函数的参数传递10.4.1 通过值传递10.4.2 通过引用传递10.4.3 缺省参数值10.4.4 通过名字...
task send(int j);//int j 为automatic 变量,每次call send 均会为j分配新的存储空间 fork begin $display("Driving port %0d",j); #1; end join_none endtask end endprogram 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.