[Bug libgcc/66382] POWER8 Vector optimized implementation of __float128 (IEEE754 128-bit Binary Floating Point)

[munroesj at us dot ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66382

--- Comment #2 from Steven Munroe <munroesj at us dot ibm.com> ---
What is the issue? You want to configure __float128 without also configuring
altivec/VMX/VSX?

The PowerPC 64-bit ABI is defined to pass __float128 values in 128-bit vector
registers and return _float128 values in VR2.

How parameters are passed is independent of the computation.