diff options
Diffstat (limited to 'techlibs/ice40/arith_map.v')
| -rw-r--r-- | techlibs/ice40/arith_map.v | 37 |
1 files changed, 15 insertions, 22 deletions
diff --git a/techlibs/ice40/arith_map.v b/techlibs/ice40/arith_map.v index eefc375dd..4449fdc1b 100644 --- a/techlibs/ice40/arith_map.v +++ b/techlibs/ice40/arith_map.v @@ -44,32 +44,25 @@ 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_LUT carry_lut ( + 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]), - .CI(C[i]), - .CO(CO[i]), + .I3(C[i]), .O(Y[i]) ); -// 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]), -// .O(Y[i]) -// ); end endgenerate assign X = AA ^ BB; |