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| author | Eddie Hung <eddie@fpgeh.com> | 2019-08-20 11:57:52 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-08-20 11:57:52 -0700 |
| commit | d9fe4cccbf3cc03fa57b177fd13c6e900a2134f7 (patch) | |
| tree | aceb37b755f6b112e754bbdd50f0a4a6a6ee111d /techlibs/ice40/arith_map.v | |
| parent | 297a9802122817e143b1e4b87fd0d4e357606a72 (diff) | |
| parent | 3f4886e7a3ff14578b9c6d614efd360478e5886e (diff) | |
| download | yosys-d9fe4cccbf3cc03fa57b177fd13c6e900a2134f7.tar.gz yosys-d9fe4cccbf3cc03fa57b177fd13c6e900a2134f7.tar.bz2 yosys-d9fe4cccbf3cc03fa57b177fd13c6e900a2134f7.zip | |
Merge remote-tracking branch 'origin/master' into eddie/synth_xilinx
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; |