From: Paul Zimmermann <Paul.Zimmermann@inria.fr>
To: newlib@sourceware.org
Subject: regression in tgamma?
Date: Tue, 15 Dec 2020 14:35:31 +0100 [thread overview]
Message-ID: <mwk0tjur8c.fsf@tomate.loria.fr> (raw)
Hi,
while updating my comparison from Newlib 3.3.0 to Newlib 4.0.0, I found a
regression in tgamma on x86_64/Linux:
$ cat test3.c
#include <stdio.h>
#include <math.h>
#ifdef NEWLIB
int errno;
int* __errno () { return &errno; }
#endif
int main()
{
double x = -0x1.53f198fe3b278p+7, y;
y = tgamma (x);
printf ("x=%a y=%a\n", x, y);
}
Newlib 3.3.0:
$ gcc -DNEWLIB -no-pie test3.c /localdisk/zimmerma/newlib-3.3.0/libm.a; ./a.out
x=-0x1.53f198fe3b278p+7 y=0x1.fd6d312572d9cp-1015
Newlib 4.0.0:
$ gcc -DNEWLIB -no-pie test3.c /localdisk/zimmerma/newlib-4.0.0/libm.a; ./a.out
x=-0x1.53f198fe3b278p+7 y=0x1p+0
Please can someone confirm?
Best regards,
Paul
next reply other threads:[~2020-12-15 13:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-15 13:35 Paul Zimmermann [this message]
2020-12-15 17:11 ` Jeff Johnston
2020-12-16 6:36 ` Paul Zimmermann
2020-12-16 13:48 Paul Zimmermann
2020-12-16 20:31 ` Jeff Johnston
2020-12-17 7:29 ` Paul Zimmermann
2020-12-17 16:13 ` Keith Packard
2020-12-17 18:27 ` Jeff Johnston
2020-12-17 19:16 ` Keith Packard
2020-12-17 21:28 ` Jeff Johnston
2020-12-18 6:36 ` Paul Zimmermann
2020-12-18 8:42 ` Corinna Vinschen
2020-12-18 8:54 ` Paul Zimmermann
2020-12-18 9:07 ` Corinna Vinschen
2020-12-18 17:42 ` Jeff Johnston
2020-12-18 8:37 ` Paul Zimmermann
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