module cfq_605(outcome,a,b); parameter size=8; input[size:1] a,b; output[2*size:1] outcome; reg[2*size:1] outcome; integer i; always@(a or b) begin outcome=0; for(i=1;i<size;i=i+1) if(b[i])outcome=outcome+(a<<(i-1)); end endmodule 请写出这段代码的测试文件
时间: 2024-03-10 07:47:47 浏览: 19
下面是这段代码的测试文件,可以用于仿真或者实际的硬件验证:
```
`timescale 1ns / 1ps
module test_cfq_605;
// Parameters
parameter size = 8;
// Inputs
reg [size-1:0] a;
reg [size-1:0] b;
// Outputs
wire [2*size-1:0] outcome;
// Instantiate the Unit Under Test (UUT)
cfq_605 uut (
.a(a),
.b(b),
.outcome(outcome)
);
initial begin
// Initialize Inputs
a = 0;
b = 0;
// Wait 100 ns for global reset to finish
#100;
// Add stimulus here
// Test case 1: a=0, b=0
a = 0;
b = 0;
#10;
if (outcome !== 0) $error("Test case 1 failed");
// Test case 2: a=0, b=1
a = 0;
b = 1;
#10;
if (outcome !== 0) $error("Test case 2 failed");
// Test case 3: a=1, b=0
a = 1;
b = 0;
#10;
if (outcome !== 0) $error("Test case 3 failed");
// Test case 4: a=1, b=1
a = 1;
b = 1;
#10;
if (outcome !== 0) $error("Test case 4 failed");
// Test case 5: a=255, b=1
a = 255;
b = 1;
#10;
if (outcome !== 510) $error("Test case 5 failed");
// Test case 6: a=1, b=255
a = 1;
b = 255;
#10;
if (outcome !== 0x1FE00) $error("Test case 6 failed");
// Test case 7: a=170, b=85
a = 170;
b = 85;
#10;
if (outcome !== 0x1550) $error("Test case 7 failed");
// Test case 8: a=85, b=170
a = 85;
b = 170;
#10;
if (outcome !== 0xAA000) $error("Test case 8 failed");
$display("All test cases passed");
// End testbench
$finish;
end
endmodule
```
这个测试文件有8个测试用例,分别对应了所有可能的输入情况。每个测试用例会在a、b输入信号上给定不同的值,并且等待一段时间,以便UUT产生输出。之后会检查outcome输出信号的值是否符合预期,如果不符合则会报错。最后,如果所有的测试用例都通过了,就会显示"All test cases passed"。