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| author | Eddie Hung <eddie@fpgeh.com> | 2019-08-19 10:07:27 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-08-19 10:07:27 -0700 |
| commit | 2f4e0a5388c58726ec8b3d073e3ebc51897fd13c (patch) | |
| tree | bb5f6bb14eb4bd83a7e302b7e4666c716234beee /techlibs/ice40/arith_map.v | |
| parent | e301440a0bae76dcff159c77274c91aad40021c0 (diff) | |
| parent | 98a54353b7d893752d856b3726853d4921c6aa1f (diff) | |
| download | yosys-2f4e0a5388c58726ec8b3d073e3ebc51897fd13c.tar.gz yosys-2f4e0a5388c58726ec8b3d073e3ebc51897fd13c.tar.bz2 yosys-2f4e0a5388c58726ec8b3d073e3ebc51897fd13c.zip | |
Merge remote-tracking branch 'origin/master' into xaig_dff
Diffstat (limited to 'techlibs/ice40/arith_map.v')
| -rw-r--r-- | techlibs/ice40/arith_map.v | 30 |
1 files changed, 8 insertions, 22 deletions
diff --git a/techlibs/ice40/arith_map.v b/techlibs/ice40/arith_map.v index fe83a8e38..26b24db9e 100644 --- a/techlibs/ice40/arith_map.v +++ b/techlibs/ice40/arith_map.v @@ -44,35 +44,21 @@ 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 -`ifdef _ABC - \$__ICE40_FULL_ADDER carry ( + \$__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 ( .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; |