Peter Klausler 4daa33f6d1 [flang][runtime] Use __float128 where possible & needed in runtime ...

On targets with __float128 available and distinct from long double,
use it to support more kind=16 entry points.  This affects mostly
x86-64 targets.  This means that more runtime entry points are
defined for lowering to call.

Delete Common/long-double.h and its LONG_DOUBLE macro in favor of
testing the standard macro LDBL_MANT_DIG.

Differential Revision: https://reviews.llvm.org/D127025

2022-06-05 09:16:57 -07:00

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