1 files changed, 54 insertions, 0 deletions
diff --git a/ice40/pack_tests/place_constr.v b/ice40/pack_tests/place_constr.v
new file mode 100644
index 00000000..f915a203
--- /dev/null
+++ b/ice40/pack_tests/place_constr.v
@@ -0,0 +1,54 @@
+module top(input clk, cen, rst, ina, inb, output outa, outb, outc, outd);
+
+wire temp0, temp1;
+
+(* BEL="1_1_lc0" *)
+SB_LUT4 #(
+    .LUT_INIT(2'b01)
+) lut0 (
+    .I3(),
+    .I2(),
+    .I1(),
+    .I0(ina),
+    .O(temp0)
+);
+
+
+(* BEL="1_3_lc0" *)
+SB_LUT4 #(
+    .LUT_INIT(2'b01)
+) lut1 (
+    .I3(),
+    .I2(),
+    .I1(),
+    .I0(inb),
+    .O(temp1)
+);
+
+(* BEL="1_1_lc0" *)
+SB_DFF ff0 (
+    .C(clk),
+    .D(temp1),
+    .Q(outa)
+);
+
+
+(* BEL="1_1_lc7" *)
+SB_DFF ff1 (
+    .C(clk),
+    .D(inb),
+    .Q(outb)
+);
+
+
+(* BEL="1_6_lc7" *)
+SB_DFF ff2 (
+    .C(clk),
+    .D(temp1),
+    .Q(outc)
+);
+
+
+assign outd = 1'b0;
+
+endmodule