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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/107370] long double precision is wrong in ARM 64
Date: Mon, 24 Oct 2022 15:19:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107370

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I get the following output from ubuntu 1804's gcc and the trunk of gcc from
20220808:

ubuntu@ubuntu:~/src/upstream-gcc\# ~/upstream-gcc/bin/gcc t54.c -O2
ubuntu@ubuntu:~/src/upstream-gcc\# ./a.out
1.4142135623730950488

trunk gcc:
.LC1:
        .word   325511829
        .word   -922176773
        .word   -429395012
        .word   1073703433

ubuntu gcc:
.LC0:
        .word   325511829
        .word   3372790523
        .word   3865572284
        .word   1073703433

Both of these are the same, just unsigned vs signed output.

As far as I can tell, this is not a GCC issue. It might be a binutils issue=
 or
a glibc issue with printf.=