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# Untitled

a guest Feb 20th, 2019 73 Never
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1. reg [7:0] a;
2. reg signed [7:0] b;
3. reg [7:0] c;
4. reg signed [7:0] d;
5.
6. initial begin
7.   a =  -8'd69 ;
8.   b =  -8'd69 ;
9.   c =  -8'd69 ;
10.   d =  -8'd69 ;
11.   #10ns;
12.   a = a/2     ;
13.   b = b/2     ;
14.   #10ns;
15.   \$display("a      : %8b, %d", a, a);
16.   \$display("b      : %8b, %d", b, b);
17.   \$display("c >>>1 : %8b, %d", c>>>1, c>>>1);
18.   \$display("d >>>1 : %8b, %d", d>>>1, d>>>1);
19. end
20.
21. a      : 01011101,  93
22. b      : 11011110,  -34
23. c >>>1 : 01011101,  93
24. d >>>1 : 11011101,  -35
25.
26. //Declare the reg as signed and divide by a signed value
27. reg signed [7:0] myReg;
28. assign result = myReg/2;
29.
30. //Use system functions
31. assign result = \$signed(myReg)/2;
32.
33. reg signed [7:0] a;
34. reg [7:0] b;
35.
36. initial
37. begin
38. result = a;            //Signed
39. result = a * a;        //Signed
40. result = a * 10;       //Signed
41. result = \$unsigned(a); //Unsigned
42. result = a[0];         //Unsigned
43. result = a[7:0];       //Unsigned
44. result = {a,a};        //Unsigned
45. result = 10{a};        //Unsigned
46. result = a + b;        //Unsigned
47. result = a * b;        //Unsigned
48. end
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