代码 moduletop_module(input[2:0]a,input[2:0]b,output[2:0]out_or_bitwise,outputout_or_logic...
Bitwise operators Verilog operators "&" ("and") and "|" ("or") can be applied to a bus. That allows to "gate" all the individual signals of a bus together. wire [7:0] my_bus; // these 2 statements are equivalent wire my_bus_is_all_1s = (my_bus==8'hFF); wire my_bus_is...
modulebitwise(); reg[3:0]rega,regb,regc; reg[3:0]num; initialbegin rega=4'b1001; regb=4'b1010; regc=4'b11x0; end initialfork #10num=rega&0;// num=0000 #20num=rega®b;// num=1000 #30num=rega|regb;// num=1011 ...
A_Bus 与!B_Bus 的结果同为 0. 如果任意一个操作数包含 x,结果也为 x.!x 结果为 x. 4. 位运算符(Bitwise Operator) 按位操作符有:~(一元非),&(二元与),|(二元或),^(二元异或)及~^和 ^~(二元 异或非). 这些操作符在输入操作数的对应位上按位操作,并产生向量结果.如果操作数长度不相 等, ...
按位操作符按位操作符module bitwise (); reg 3: 0 rega, regb, regc; reg 3: 0 num; initial begin rega = 4b1001; regb = 4b1010; regc = 4b11x0; end initial fork #10 num = rega & 0; 6、 / num = 0000 #20 num = rega & regb; / num = 1000 #30 num = rega | regb;...
Bitwise Operators The bitwise operators evaluate to integer values. Each operator combines a bit in one operand with the correspondingbit in the other operand to calculate a result according to these logic tables. Bitwise Operator Application & a&b | a|b ^ a^b ^~, ~^ a ^~ b, a~^...
modulebitwise_xor(out,i0,i1); //参数声明语句。参数可以重新定义 parameterN=32;//缺省的总线位宽为32位 //端口声明语句 output[N-1:0]out; input[N-1:0]i0,i1; //声明一个临时循环变量。 //该变量只用于生成块的循环计算。 //Verilog仿真时该变量在设计中并不存在 genvarj; //用一个单循环生...
• 最长可以是1023个字符 • 标识符区分大小写,sel和SEL是不同的标 识符 • 模块、端口和实例的名字都是标识符 • module MUX2_1 (out, a, b, sel); • output out; Verilog标识 符 文字规则—标识符(identifiers) • 有效标识符举例: • shift_reg_a • busa_index • _bus3 •...
refer to the Setting Global Constraints and Options section of the Design Constraints chapter. Introduction Complex circuits are commonly designed using a top down methodology. Various specification levels are required at each stage of the design process. As an example, at the architectural level, a...
第06讲 Verilog-HDL语法——第4部分 操作符