💻Intel's 8087 Chip Dropped Floating-Point Times by 99%
Your old PC just got 100x faster at math
TL;DR
Intel's 8087 chip, introduced in 1980, slashed floating-point operation times by 99%. It used CORDIC and polynomial approximation for speed and accuracy, making it a game-changer for early PCs and beyond.
Intel's 8087 chip, introduced in 1980, cut floating-point operation times by 99%, computing a tangent in 90 microseconds instead of 13,000 on the 8086. This was a massive leap for early PCs, making complex calculations feasible. The chip's CORDIC algorithm and polynomial approximation ensured both speed and accuracy, setting a new standard for floating-point performance. The 8087's impact extended beyond PCs to calculators and graphics, proving its versatility and longevity.
Key Points
8087 chip introduced in 1980, cut floating-point times by 99%.
CORDIC algorithm breaks down angles into special angles for fast rotation.
Special angles precomputed and stored in a table for quick access.
Padé approximant used for remaining small angles, very accurate.
8087 chip's datapath performs floating-point calculations on 80-bit values.
Why It Matters
If you're running legacy systems or studying computer history, the 8087's impact on floating-point performance is crucial. It enabled complex calculations in early PCs, calculators, and graphics, fundamentally changing how we handle math in computing.
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