Very strange. I'd almost say that you'd discovered a bug in perl or the underlying C-libraries that was causing the double precision (64-bit) NV value to be transitioned through a single precision (32-bit) float whilst being formatted.

If the values were always being manipulated as doubles, this shouldn't happen.

It could be a that the IEEE rounding mode isn't being set (correctly?).

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: RFC: Large Floating Point Numbers - Rounding Errors by BrowserUk
in thread RFC: Large Floating Point Numbers - Rounding Errors by GAVollink

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