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Background: Due to current qemu 6.2 doesn't support float128, this cause some POSIX APIs(e.g. double difftime()..) return a wrong value, this issue can be reproduced by open_posix_testsuit difftime case[1]. The qemu upstream has already supported ppc64 float128, but need to update to qemu 7.0 or later. We backport the commits[2] from upstream to support that in qemu-ppc64 6.2.0. [1] difftime test case: https://github.com/linux-test-project/ltp/tree/master/testcases/open_posix_testsuite/conformance/interfaces/difftime [2] commits link: LINK: https://git.qemu.org/?p=qemu.git;a=commit;h=149a48f6e6ccedfa01307d45884aa480f5bf77c5 https://git.qemu.org/?p=qemu.git;a=commit;h=ba11446c40903b9d97fb75a078d43fee6444d3b6 https://git.qemu.org/?p=qemu.git;a=commit;h=bead3c9b0ff8efd652afb27923d8ab4458b3bbd9 https://git.qemu.org/?p=qemu.git;a=commit;h=10cc964030fca459591d9353571f3b1b4e1b5aec https://git.qemu.org/?p=qemu.git;a=commit;h=e706d4455b8d54252b11fc504c56df060151cb89 https://git.qemu.org/?p=qemu.git;a=commit;h=941298ecd7e3103d3789d2dd87dd0f119e81c69e https://git.qemu.org/?p=qemu.git;a=commit;h=4edf55698fc2ea30903657c63ed95db0d5548943 https://git.qemu.org/?p=qemu.git;a=commit;h=c07f82416cb7973c64d1e21c09957182b4b033dc https://git.qemu.org/?p=qemu.git;a=commit;h=e4052bb773cc829a27786d68caa22f28cff19d39 https://git.qemu.org/?p=qemu.git;a=commit;h=ffdaff8e9c698061f57a6b1827570562c5a1c909 https://git.qemu.org/?p=qemu.git;a=commit;h=201fc774e0e1cc76ec23b595968004a7b14fb6e8 https://git.qemu.org/?p=qemu.git;a=commit;h=c5df1898a147c232f0502cda5dac8df6074070fc https://git.qemu.org/?p=qemu.git;a=commit;h=38d4914c5065e14f0969161274793ded448f067f https://git.qemu.org/?p=qemu.git;a=commit;h=caf6f9b568479bea6f6d97798be670f21641a006 https://git.qemu.org/?p=qemu.git;a=commit;h=25ee608d79c1890c0f4e8c495ec8629d5712de45 https://git.qemu.org/?p=qemu.git;a=commit;h=19f0862dd8fa6510b2f5b3aff4859363602cd0cf https://git.qemu.org/?p=qemu.git;a=commit;h=5f1470b091007f24035d6d33149df49a6dd61682 https://git.qemu.org/?p=qemu.git;a=commit;h=17868d81e0074905b2c1e414af6618570e8059eb https://git.qemu.org/?p=qemu.git;a=commit;h=9193eaa901c54dbff4a91ea0b12a99e0135dbca1 https://git.qemu.org/?p=qemu.git;a=commit;h=e4318ab2e423c4caf9a88a4e99b5e234096b81a9 https://git.qemu.org/?p=qemu.git;a=commit;h=3bb1aed246d7b59ceee625a82628f7369d492a8f (From OE-Core rev: 5ed94b1d155a7d5597358a93c65dfe98ac07ea15) Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com> Signed-off-by: Steve Sakoman <steve@sakoman.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>