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A bit more on where $lcu comes from

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Eddie Hung 2019-08-09 09:50:47 -07:00
parent 5aef998957
commit acfb672d34
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techlibs/common/simlib.v
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@ -537,6 +537,8 @@ endmodule
// used in binary arithmetic operations. By replacing the ripple
// carry structure used in full-adder blocks, the more significant
// bits of the sum can be expected to be computed more quickly.
// Typically created during `techmap` of $alu cells
// (see the "_90_alu" rule in +/techmap.v)
module \$lcu (P, G, CI, CO);
parameter WIDTH = 1;