Intel's $475 million error: the silicon behind the Pentium division bug

505 · Ken Shirriff · Dec. 28, 2024, 7:02 p.m.
Summary
The blog post analyzes the infamous FDIV bug found in Intel's Pentium processor, detailing its origins, the technical flaws in the division algorithm, and the significant fallout for Intel, including the financial impact and the recall of chips. The article delves into the engineering behind the division lookup table, the mathematical underpinnings, and how the bug was discovered and fixed, while also discussing the broader implications of processor reliability in computing.