From b1787615514f84c83c27d08011427e90c9bd0f4a Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Fri, 24 Jan 2020 11:59:48 -0800 Subject: ice40: reduce ABC9 internal fanout warnings with a param for CI->I3 --- techlibs/ice40/arith_map.v | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'techlibs/ice40/arith_map.v') diff --git a/techlibs/ice40/arith_map.v b/techlibs/ice40/arith_map.v index 00a07247b..ed4140e44 100644 --- a/techlibs/ice40/arith_map.v +++ b/techlibs/ice40/arith_map.v @@ -49,13 +49,14 @@ module _80_ice40_alu (A, B, CI, BI, X, Y, CO); // A[1]: 1100 1100 1100 1100 // A[2]: 1111 0000 1111 0000 // A[3]: 1111 1111 0000 0000 - .LUT(16'b 0110_1001_1001_0110) + .LUT(16'b 0110_1001_1001_0110), + .I3_IS_CI(1'b1) ) carry ( .A(AA[i]), .B(BB[i]), .CI(C[i]), .I0(1'b0), - .I3(C[i]), + .I3(1'bx), .CO(CO[i]), .O(Y[i]) ); -- cgit v1.2.3