Viaduct API for a hybrid between generic and full-custom arch

Signed-off-by: gatecat <gatecat@ds0.me>

1 files changed, 35 insertions, 0 deletions

diff --git a/generic/viaduct/example/example_prims.v b/generic/viaduct/example/example_prims.v
new file mode 100644
index 00000000..d2813129
--- /dev/null
+++ b/generic/viaduct/example/example_prims.v
@@ -0,0 +1,35 @@
+module LUT4 #(
+    parameter [15:0] INIT = 0
+) (
+    input [3:0] I,
+    output F
+);
+    wire [7:0] s3 = I[3] ?     INIT[15:8] :     INIT[7:0];
+    wire [3:0] s2 = I[2] ?       s3[ 7:4] :       s3[3:0];
+    wire [1:0] s1 = I[1] ?       s2[ 3:2] :       s2[1:0];
+    assign F = I[0] ? s1[1] : s1[0];
+endmodule
+
+module DFF (
+    input CLK, D,
+    output reg Q
+);
+    initial Q = 1'b0;
+    always @(posedge CLK)
+        Q <= D;
+endmodule
+
+module INBUF (
+    input PAD,
+    output O,
+);
+    assign O = PAD;
+endmodule
+
+module OUTBUF (
+    output PAD,
+    input I,
+);
+    assign PAD = I;
+endmodule
+