Gustafnot

Reproducibility is an orthogonal issue to Posits vs IEEE754.

Most developers prefer speed over reproducibility, and are encouraged to use denormal-to-zeros, fast-math optimizations, fused MAC, approximated square root function and whatever else is available to achieve results.

The IEEE754 standard provides a guarantee for deterministic results, and many multi-precision and interval arithmetic libraries depend on this guarantee to be true to function properly.

IEEE754 defines unique -infinity and +infinity values, and any "new and improved" standard that breaks this axiom is just incompatible with all existing floating-point libraries written in the last +30 years.

"These claims pander to Ignorance and Wishful Thinking." Kahan (main author of IEEE754) on Posits claims.

He will keep failing to replace IEEE floating point as long as he insists on making NEGATIVE infinity the same as POSITIVE infinity.

Also, IEEE 754 floating point standard guarantees the results of addition, subtraction, multiplication, division, and square root to be the exact correctly rounded value, ie a deterministic result, contrary to what he says.