diff options
Diffstat (limited to 'techlibs/ice40/arith_map.v')
| -rw-r--r-- | techlibs/ice40/arith_map.v | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/techlibs/ice40/arith_map.v b/techlibs/ice40/arith_map.v index 4449fdc1b..ed4140e44 100644 --- a/techlibs/ice40/arith_map.v +++ b/techlibs/ice40/arith_map.v @@ -44,23 +44,20 @@ module _80_ice40_alu (A, B, CI, BI, X, Y, CO); genvar i; generate for (i = 0; i < Y_WIDTH; i = i + 1) begin:slice - SB_CARRY carry ( - .I0(AA[i]), - .I1(BB[i]), + \$__ICE40_CARRY_WRAPPER #( + // A[0]: 1010 1010 1010 1010 + // 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), + .I3_IS_CI(1'b1) + ) carry ( + .A(AA[i]), + .B(BB[i]), .CI(C[i]), - .CO(CO[i]) - ); - SB_LUT4 #( - // I0: 1010 1010 1010 1010 - // I1: 1100 1100 1100 1100 - // I2: 1111 0000 1111 0000 - // I3: 1111 1111 0000 0000 - .LUT_INIT(16'b 0110_1001_1001_0110) - ) adder ( .I0(1'b0), - .I1(AA[i]), - .I2(BB[i]), - .I3(C[i]), + .I3(1'bx), + .CO(CO[i]), .O(Y[i]) ); end endgenerate |