[glibc] added pair of inputs for hypotf in binary32

[glibc] added pair of inputs for hypotf in binary32

[Paul Zimmermann]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cf7ffdd8a5f6da55397e10b3860062944312824c

commit cf7ffdd8a5f6da55397e10b3860062944312824c
Author: Paul Zimmermann <Paul.Zimmermann@inria.fr>
Date:   Sun Feb 12 08:01:18 2023 +0100

    added pair of inputs for hypotf in binary32
    
    This pair yields an error of 1 ulp in binary32, whereas the current
    maximal known error for hypotf on x86_64 is zero:
    
    Checking hypot with glibc-2.37
    hypot 0 -1 -0x1.003222p-20,-0x1.6a2d58p-32 [0.501] 0.500001 0.500000001392678
    libm gives 0x1.003224p-20
    mpfr gives 0x1.003222p-20
    
    See https://sourceware.org/pipermail/libc-alpha/2023-February/145432.html
    and https://sourceware.org/pipermail/libc-alpha/2023-February/145442.html
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

Diff:
---
 math/auto-libm-test-in | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in
index 393d9fcfaa..c400cafb4b 100644
--- a/math/auto-libm-test-in
+++ b/math/auto-libm-test-in
@@ -5773,6 +5773,8 @@ hypot 0x1p-16384 0x1p-16446
 hypot 0x1p-16383 0x1p-16494
 
 hypot -0x1.fa7deap+0 0x1.a761bab383ac8p+0
+# the following inputs yield an error of 1 ulp on x86_64 in binary32
+hypot -0x1.003222p-20 -0x1.6a2d58p-32
 
 j0 -1.0
 j0 0.0