“随着综合工具的进步,已经不需要讨论if-else 和case的区别了,两者可以等同 ” “Verilog 2001标准(IEEE 1364-2001)第132页: The case item expressions shall be evaluated and compared in the exact order in which they are given. 指出了case是串行有优先级。又: Apart from syntax, the case statement di...
The code snippet below shows the general syntax for the case statement in verilog. case(<variable>)<value1> :begin// This branch executes when <variable> = <value1>end<value2> :begin// This branch executes when <variable> = <value2>enddefault:begin// This branch executes in all other ...
4. Conditional、 Case statement 常见用法1 case(sig)1'b0:beginresult=0;end1'b1:beginresult=flaga;end1'bx,1'bz:beginresult=flaga?'bx:0;enddefaultresult='bx;endcasecase(sig)1'bz:begin$display("signal is floating");end1'bx:begin$display("signal is unknown");enddefault:begin$display("s...
S,En)//2001, 2005 syntax;或@(D or S or En)beginif(En==1)Y=0;//En=1时,输出为0else//En=0时,选择器工作case(S)2’d0:Y=D[0];2’d1:Y=D[1];2’d2:Y=D[2];2’d3:Y=D[3];endcaseendendmodule
The case item expressions shall be evaluated and compared in the exact order in which they are given.指出了case是串行有优先级。又: CODE: Apart from syntax, the case statement differs from the multiway if-else-if construct in two important ways: a) The conditional expressions in the if-else...
I want to make ELU function in the verilog-A code, but it shows syntax error continuously. But the Verilog-A document says that this is the correct syntax, so I would like to ask you what should I fix. module myVerilogAmodel(d, g, s); ...
This code is proper in syntax and could be synthesized too. But in this way, I couldn't insert the default part of case statement in the loop. What I wanna express is like below case(ctrl) 0 : out <= 0; 1 : out <= 1; 2 : out <= 2; 3 : out <= 3; 4 : out <=...
When the number of the nesting grows, it becomes difficult to understand the if else statement. The verilog case statement, comes handy in such cases. We will first look at the usage of the case statement and then learn about its syntax and variations. ...
Syntax A Verilogcasestatement starts with thecasekeyword and ends with theendcasekeyword. The expression within parantheses will be evaluated exactly once and is compared with the list of alternatives in the order they are written and the statements for which the alternative matches the given expres...