| module opt_share_test( | |
| input [15:0] a, | |
| input [15:0] b, | |
| input [15:0] c, | |
| input [15:0] d, | |
| input [2:0] sel, | |
| output reg [15:0] res | |
| ); | |
| always @* begin | |
| case(sel) | |
| 0: res = a + d; | |
| 1: res = a - b; | |
| 2: res = b; | |
| 3: res = b - c; | |
| 4: res = b - a; | |
| 5: res = c; | |
| 6: res = a - c; | |
| default: res = 16'bx; | |
| endcase | |
| end | |
| endmodule |