https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106165
Vincent Lefèvre <vincent-gcc at vinc17 dot net> changed:
What |Removed |Added
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CC| |vincent-gcc at vinc17 dot net
--- Comment #6 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to xeioex from comment #5)
> My question is more practical. For example while
> `-fexcess-precision=standard` fixes the problem in GCC. But, I am left with
> the same problem regarding other compilers.
The need for -fexcess-precision=standard is due to a "bug" in GCC (more
precisely, a non-conformance issue with the ISO C standard). If the other
compilers conform to the C standard by default, you won't have to do anything.
Note that even with -fexcess-precision=standard, you get double rounding, i.e.
a first rounding to extended precision, then a second rounding to double
precision. This is allowed by the C standard, but may break some algorithms or
give results different from platforms with a single rounding.
