From 0f9490212577314f144adc8432125c81ec7bad2b Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Mon, 30 Nov 2015 11:41:12 +0100 Subject: Added tests/simple/graphtest.v --- tests/simple/graphtest.v | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 tests/simple/graphtest.v (limited to 'tests') diff --git a/tests/simple/graphtest.v b/tests/simple/graphtest.v new file mode 100644 index 00000000..74788dbb --- /dev/null +++ b/tests/simple/graphtest.v @@ -0,0 +1,34 @@ +module graphtest (A,B,X,Y,Z); + +input [3:0] A; +input [3:0] B; +output reg [3:0] X; +output [9:0] Y; +output [7:0] Z; + +wire [4:0] t; + +assign t[4] = 1'b0; // Constant connects to wire +assign t[2:0] = A[2:0] & { 2'b10, B[3]}; // Concatenation of intermediate wire +assign t[3] = A[2] ^ B[3]; // Bitwise-XOR + +// assign Y[2:0] = 3'b111; +// assign Y[6:3] = A; +// assign Y[9:7] = t[0:2]; +assign Y = {3'b111, A, t[2:0]}; // Direct assignment of concatenation + +assign Z[0] = 1'b0; // Constant connects to PO +assign Z[1] = t[3]; // Intermediate sig connects to PO +assign Z[3:2] = A[2:1]; // PI connects to PO +assign Z[7:4] = {1'b0, B[2:0]}; // Concat of CV and PI connect to PO + +always @* begin + if (A == 4'b1111) begin // All-Const at port (eq) + X = B; + end + else begin + X = 4'b0000; // All-Const at port (mux) + end +end + +endmodule -- cgit v1.2.3