在“tb” module中,我们定义了“int i”,并定义了一个enum“sports”并声明了一个sports类型的变量“mS”。 将一个int赋值给enum类型(sports)的变量 mS = i; 由于" i "不是enum类型,存在类型不兼容,所以会得到Synopsys - VCS的warnning(不是ERROR哦): Warning-[ENUMASSIGN] I
状态机的enum状态定义 casting功能 展开写一下第二条：比如说现在有一个宽度由参数定义的寄存器 reg [W...
大家可能有点奇怪,这个不兼容类型的赋值到底是warning还是Error,结论就是这个这个enum 值有实际的分配,其实对代码功能没有影响,当作warning也是没有问题的。 为了纠正这种类型不兼容的赋值错误/警告,我们使用$cast将“i”强制转换为enum“mS”:$cast(mS, i); 在这个上下文下,$cast就是作为task调用的。这种动态cas...
36. · Casting · 与C语言中一样,Casting(类型转换)用于将一种类型的数据转换为另一种类型的数据。可以使用强制转换(’)操作更改数据类型。 module casting_data(); int a = 0; shortint b = 0; initial begin $monitor ("%g a = %d b = %h", $time, a , b); #1 a = int'(2.3 * 3.3);...
system verilog中新加了很多幅值语句,虽然都只适用于阻塞幅值,但是在某些场合中非常实用. 下面是一段有意思的代码,覆盖了一些用法. package definitions; typedef enum logic [:] {ADD,SUB,MULT,DIV,SL,SR} opcode_t; typedef enum logic {UNSIGNED, SIGNED} operand_type_t; typedef union packed { logic [:...
1、- SystemVerilog -alias const &= |= = %=- from C / C+-int globals breakshortint enum continuelongint typedef returnByte structures do-whileShortreal unions + - += -= *= /=void casting = = if-elserepeat- Verilog -1995 - System Verilog RTL RTL Netlist设计效率设计效率 testbenchCo...
typedef enum {RED, GREEN,YELLOW} Color; void function do_nothing() endfunction endpackage : ABC import ABC::Color; import ABC::*; // Import everything inside the package 1. 2. 3. 4. 5. 6. 7. 8. 14 $cast的用途是什么 通过$cast可以将值赋给数据类型不同的变量,特别是将基类的句柄赋...
— C data types: int, typedef, struct, union, enum — other data types: bounded queues, logic (0, 1, X, Z) and bit (0, 1), tagged unions for safety — dynamic data types: string, classes, dynamic queues, dynamic arrays, associative arrays including automatic memory management freeing...
enum logic[2:0] {WAIT=3'b001, LOAD=3'b010, DONE=3'b100} states; SystemVerilog also provides several built-in methods for working with enumerated types. These methods allow, for example, incrementing to the next value in a type list, without having to know the name of that next value...
C data types: int, typedef, struct, union, enum ? other data types: bounded queues, logic (0, 1, X, Z) and bit (0, 1), tagged unions ? dynamic data types: string, class, dynamic queues, dynamic arrays, associated arrays including automatic memory management ? dynamic casting and bit...