3 ms·
Vector engines really suffer from numerical stability problems, so for certain kinds of problems, you'll get wrong answers (but at least you'll get them fast).
by mmarx 9y ago
Vector engines really suffer from numerical stability problems, so for certain kinds of problems, you'll get wrong answers (but at least you'll get them fast).
- justincormack 9y agoCitation? They are generally IEEE compliant; there can be some differences in denorm handling?
- mmarx 9y agoIEEE compliance only gives you guarantees on individual arithmetic operations. Vector machines take away control over the order in which operations are performed, but floating-point addition is not associative. Changing the order in which the terms of a sum are added may lead to vastly different results, due to, e.g., truncation.