[PATCH 0/2] Power10 IEEE 128-bit min, max, cmove

[Michael Meissner <meissner@linux.ibm.com>]

These two patches add support for the XSMAXCQP, XSMINCQP, XSCMP{EQ,GT,GE}QP
instructions in the Power10.  These instructions allow the compiler to generate
minimum, maxmimum, and conditional move support for IEEE 128-bit floating point
type.

I have posted versions of these patches before, going back to at least the June
time frame.  Because I wanted to focus on getting support in the library to
allow long double to be configured as IEEE 128-bit on little endian PowerPC
server systems, I haven't reposted these patches in awhile.  While the other
patches are more important, it would be nice to get these patches into GCC 11.

In these patches, I attempted to address various comments from the previous
times I posted the patches.

There are 2 patches in this set.  The first adds the min/max support if
-ffast-math is used.  The second adds conditional move support, and it enables
the min/max to be generated more often.

I have done bootstrap compilers on both little endian power9 systems and big
endian power8 system many time.  I would like to commit these patches to the
master branch.

-- 
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.ibm.com, phone: +1 (978) 899-4797