[Bug 253313] lib/msun: hypotl(3) mishandles subnormal numbers

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253313

--- Comment #3 from commit-hook at FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=d3338f3355a612cf385632291f46c5777bba8d18

commit d3338f3355a612cf385632291f46c5777bba8d18
Author:     Dimitry Andric <dim at FreeBSD.org>
AuthorDate: 2021-02-10 22:28:43 +0000
Commit:     Dimitry Andric <dim at FreeBSD.org>
CommitDate: 2021-02-10 22:28:43 +0000

    Fix incorrect hypotl(3) result with subnormal numbers

    This adjusts the factor used to scale the subnormal numbers, so it
    becomes the right value after adjusting its exponent. Thanks to Steve
    Kargl for finding the most elegant fix.

    Also enable the hypot tests, and add a test case for this bug.

    PR:             253313
    MFC after:      1 week

 contrib/netbsd-tests/lib/libm/t_hypot.c | 20 ++++++++++++++++++++
 lib/msun/src/e_hypotl.c                 |  2 +-
 lib/msun/tests/Makefile                 |  1 +
 3 files changed, 22 insertions(+), 1 deletion(-)

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