Mitchell Horne
bbfbc439f2
Fix printf(3) output of long doubles on RISC-V ...
When the RISC-V port was initially committed to FreeBSD, GCC would
generate 64-bit long doubles, and the definitions in _fpmath.h reflected
that. This was changed to 128-bit in GCC later that year [1], but the
definitions were never updated, despite the documented workaround. This
causes printf(3) and friends to interpret only the low 64-bits of a long
double in ldtoa, thereby printing incorrect values.
Update the definitions now that both clang and GCC generate 128-bit long
doubles.
[1] 54b21fc5aehttps://reviews.freebsd.org/D25420
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bbfbc439f2