On 9/8/25 8:11 AM, Matthias Kretz wrote:
Andrew Pinski [Friday, 5 September 2025, 22:57:02 CEST]:
It seems that Clang and GCC disagree on mangling 80-Bit long double:
https://compiler-explorer.com/z/W1d64PjrP
I like Clang's interpretation of
https://itanium-cxx-abi.github.io/cxx-abi/
abi.html#mangle.float better.
"corresponding to the internal representation" But interpretations
seems valid since there is no mention of the padding bits.
I think GCC is better because it includes the full padding bits.
I interpret "internal representation" to say that not the decimal value is
printed but rather the bits in memory that make up the floating-point value.
And padding bits don't contribute to that value.
I wrote "like" above. I have no idea about the wording intent. But using the
shorter mangling, and a mangling that is the same on 32- and 64-bit seems
preferable. Which is why I "like" it more.
I agree. Can you address that in this patch as well?
Jason
