diff options
Diffstat (limited to 'techlibs/ice40/arith_map.v')
| -rw-r--r-- | techlibs/ice40/arith_map.v | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/techlibs/ice40/arith_map.v b/techlibs/ice40/arith_map.v index 26b24db9e..fe83a8e38 100644 --- a/techlibs/ice40/arith_map.v +++ b/techlibs/ice40/arith_map.v @@ -44,21 +44,35 @@ 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 - \$__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) - ) fadd ( +`ifdef _ABC + \$__ICE40_FULL_ADDER carry ( .A(AA[i]), .B(BB[i]), .CI(C[i]), + .CO(CO[i]), + .O(Y[i]) + ); +`else + SB_CARRY carry ( + .I0(AA[i]), + .I1(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]), - .CO(CO[i]), .O(Y[i]) ); +`endif end endgenerate assign X = AA ^ BB; |