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Re: PATCH: IA64 floating-point types
Jim Wilson <wilson@specifixinc.com> writes:
...
> On Linux, where long double is __float80, I think the only possible
> operations that can work with __float128 are load/store. This is
> because linux has no support for 128 bit FP types. However, this
> assumes it is implemented correctly, which it isn't, because we can't
> have both 80 and 128 bit FP types at the same time, so the question is
> moot.
I am working on a patch which removes this limitation. It turns out
to be easier than you might think - currently the only change to
language-independent code is the addition of "extendxftf2" and
"trunctfxf2" patterns. (The changes to the ia64 back end are
extensive, but mostly search-and-replace.)
It does seem to me that __float80 and "long double" should be the same
type on ia64-linux. I am not sure why Mark did it differently. Maybe
the psABI has something to say about this.
zw