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Diffstat (limited to 'techlibs/ice40/abc9_model.v')
| -rw-r--r-- | techlibs/ice40/abc9_model.v | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/techlibs/ice40/abc9_model.v b/techlibs/ice40/abc9_model.v new file mode 100644 index 000000000..a5e5f4372 --- /dev/null +++ b/techlibs/ice40/abc9_model.v @@ -0,0 +1,29 @@ +(* abc9_box_id = 1, lib_whitebox *) +module \$__ICE40_CARRY_WRAPPER ( + (* abc9_carry *) + output CO, + output O, + input A, B, + (* abc9_carry *) + input CI, + input I0, I3 +); + parameter LUT = 0; + parameter I3_IS_CI = 0; + wire I3_OR_CI = I3_IS_CI ? CI : I3; + SB_CARRY carry ( + .I0(A), + .I1(B), + .CI(CI), + .CO(CO) + ); + SB_LUT4 #( + .LUT_INIT(LUT) + ) adder ( + .I0(I0), + .I1(A), + .I2(B), + .I3(I3_OR_CI), + .O(O) + ); +endmodule |