- Oklahoma (/ˌoʊkləˈhoʊmə/ OH-klə-HOH-mə; Choctaw: Oklahumma, pronounced [oklahómma]), is a landlocked state in the South Central, Southern, and Southwestern regions of the United States. It borders Texas to the southwest, Kansas to the north, Missouri to the northeast, Arkansas to the southeast, New Mexico to the west, and Colorado to the northwest. Partially in the western extreme of the Upland South, it is the 20th-most extensive and the 28th-most populous of the 50 United States. Its residents are known as Oklahomans, and its capital and largest city is Oklahoma City.
- Reverse-engineering a carry-lookahead adder in the Pentium (righto.com)
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.
