Inputs Not Equal including X and Z (simulation only) // < ... Less-than // <= ... Less-than or Equal // > ... Greater-than // >= ... Greater-than or Equal 复制/拼接运算符: // The following operators either concatenates several bits into a bus or replicate // a bit or ...
1) 单目运算符(unary operator):可以带一个操作数,操作数放在运算符的右边。2) 二目运算符(binary operator):可以带二个操作数,操作数放在运算符的两边。3) 三目运算符(ternary operator):可以带三个操作,这三个操作数用三目运算符分隔开。见下例:...
不能处理的数据是没有用的,在数字电路和计算机系统中总是需要一些形式的计算,让我们来看看Verilog中的一些运算符,这些运算符可以使综合工具实现相应的硬件元素。 Verilog算术运算符 仿真文件 module des; reg [7:0] data1; reg [7:0] data2; initial begin data1 = 45; data2 = 9; $display ("Add + ...
从例子中可以看出整个Verilog HDL程序是嵌套在module和 endmodule 声明语句里的。 例[3.1.2]:module compare ( equal,a,b ); output equal; //声明输出信号equal input [1:0] a,b; //声明输入信号a,b assign equal=(a==b)?1:0; /*如果a、b 两个输入信号相等,输出为1。否则为0*/ endmodule 这个...
You may use case-equality operator (===) or case-inequality operator (!==) to match including X and Z and will always have a known value. OperatorDescription a === b a equal to b, including x and z a !== b a not equal to b, including x and z a == b a equal to b, ...
3.3.8.缩减运算符(reduction operator)栗子:reg [3:0] B; reg C; C = &B; //相当于: C =( (B[0]&B[1]) & B[2] ) & B[3]; 3.3.9.优先级别略3.3.10.关键词略3.4 赋值语句和块语句3.4.1 赋值语句两种赋值方式:非阻塞(Non_Blocking)赋值方式( 如 b <= a; ) 块结束后才完成赋值...
*单目运算符(unary operator):可以带一个操作数,操作数放在运算符的右边。 *二目运算符(binary operator):可以带二个操作数,操作数放在运算符的两边。 *三目运算符(ternary operator):可以带三个操作,这三个操作数用三目运算符分隔开。 见下例:
VLSI Design - Verilog Introduction - Verilog is a HARDWARE DESCRIPTION LANGUAGE (HDL). It is a language used for describing a digital system like a network switch or a microprocessor or a memory or a flip−flop. It means, by using a HDL we can describe
11、x10 x01xxSlide taken direct from Eric HoffmanNumbers in VerilogGeneral format is: Examples:4b1101 / this is a 4-bit binary number equal to 1310h2e7 / this is a 10-bit wide number specified in hexAvailable bases:d = decimal (please only use in test benches)h = hex (use this fr...
=lastname)$display("firstname = %s is NOT EQUAL to lastname = %s",firstname,lastname);// string comparison : check if length of firstname < or > length of lastnameif(firstname<lastname)$display("firstname = %s is LESS THAN to lastname = %s",firstname,lastname);if(firstname>...