This patch has been around for quite some time. It isn't critical for enabling IEEE 128-bit long double, but it improves code generation for float128 on power10.
I haven't received a reply for this patch: | Date: Sun, 15 Nov 2020 23:50:51 -0500 | Subject: [PATCH 1/2] Power10: Add IEEE 128-bit xsmaxcqp and xsmincqp support. | Message-ID: <20201116045051.ga3...@ibm-toto.the-meissners.org> | https://gcc.gnu.org/pipermail/gcc-patches/2020-November/559166.html -- Michael Meissner, IBM IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797