From: Paul Zimmermann <Paul.Zimmermann@inria.fr>
To: musl@lists.openwall.com
Subject: [musl] issue with acoshf
Date: Fri, 05 Feb 2021 08:18:02 +0100 [thread overview]
Message-ID: <mwim77oudx.fsf@tomate.loria.fr> (raw)
Hi,
while updating to my comparison of the accuracy of mathematical functions [1],
I have noticed an issue with acoshf in musl-1.2.2:
$ cat test_acosh_musl.c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int
main (int argc, char *argv[])
{
float x = -0x1.1e6ae8p+5;
float y;
y = acoshf (x);
printf ("x=%a y=%a\n", x, y);
}
With gcc I get NaN as expected:
$ gcc -fno-builtin test_acosh_musl.c -lm
$ ./a.out
x=-0x1.1e6ae8p+5 y=-nan
With musl-1.2.2 I get -0x1.2f63acp+3:
$ gcc -fno-builtin test_acosh_musl.c $FILES
$ ./a.out
x=-0x1.1e6ae8p+5 y=-0x1.2f63acp+3
Please can someone confirm?
Best regards,
Paul
[1] https://members.loria.fr/PZimmermann/papers/accuracy.pdf
next reply other threads:[~2021-02-05 7:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 7:18 Paul Zimmermann [this message]
2021-02-05 16:44 ` Rich Felker
2021-02-06 6:45 ` Paul Zimmermann
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