1 files changed, 12 insertions, 0 deletions
diff --git a/techlibs/ice40/abc.v b/techlibs/ice40/abc.v
new file mode 100644
index 000000000..e2a54a42c
--- /dev/null
+++ b/techlibs/ice40/abc.v
@@ -0,0 +1,12 @@
+(* abc_box_id = 1 *)
+module SB_CARRY (output CO, input CI, I0, I1);
+	assign CO = (I0 && I1) || ((I0 || I1) && CI);
+endmodule
+
+(* abc_box_id = 2 *)
+module SB_LUT4 (output O, input I0, I1, I2, I3);
+	parameter [15:0] LUT_INIT = 0;
+	// Indicate this is a black-box
+	assign O = 1'b0;
+endmodule
+