Which calculators had no known bugs?

[[kby]]

(11-20-2020 11:23 AM)Thomas Okken Wrote:  

(11-20-2020 09:34 AM)Paul Dale Wrote:  My guess would be that \( e^{y log x} \) is used.

Exactly. See this HP Journal issue, specifically, the sidebar titled "The New Accuracy: Making 2^3 = 8*" on pages 16-17. The improved accuracy was achieved by avoiding rounding on the intermediate results.

Contents of the article aside, there is more than just avoiding intermediate round-off in allowing negative bases. That can’t be done with a logarithm-based algorithm regardless of the accuracy.-kby