- Addition is harder than you’d expect, at least for a computer. Computers use multiple types of adder circuits with different tradeoffs of size versus speed. In this article, I reverse-engineer an 8-bit adder in the Pentium’s floating point unit. This adder turns out to be a carry-lookahead adder, in particular, a type known as “Kogge-Stone.“1 In this article, I’ll explain how a carry-lookahead adder works and I’ll show how the Pentium implemented it. Warning: lots of Boolean logic ahead.
- Baring, Washington (Wikipedia)
Baring is an unincorporated community and census-designated place (CDP) in King County, Washington, United States. The population was 255 at the 2020 census, up from 220 at the 2010 census. It is located on U.S. Highway 2 about 23 miles (37 km) west of Stevens Pass, along a very flat and straight three-mile section of highway that has been dubbed the “Baring Straight” (a play on the Bering Strait between Alaska and Russia), since US-2 is otherwise hilly and curvy through the mountains. The settlement was first known as “Salmon”, but by 1909 it was known as Baring.