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From: "gcc at cookiesoft dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/99810] New: Wrong const evaluation of 64-bit division
Date: Mon, 29 Mar 2021 07:52:31 +0000 [thread overview]
Message-ID: <bug-99810-4@http.gcc.gnu.org/bugzilla/> (raw)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99810
Bug ID: 99810
Summary: Wrong const evaluation of 64-bit division
Product: gcc
Version: 10.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc at cookiesoft dot de
Target Milestone: ---
Host: x86_64
Target: arm
The following code produces a different result on arm and x86_64:
https://gcc.godbolt.org/z/PPvoscdWa
```
#include <inttypes.h>
#include <stdio.h>
int main() {
printf("%" PRId64 "\n", -62135769600000000 / 1000000);
}
```
ARM: -2006227456 (FFFF FFFF 886B 6600)
X86: -62135769600 (FFFF FFF1 886B 6600)
No single warning is given and I of course would like to see the x86 output,
because that's the right one ;)
next reply other threads:[~2021-03-29 7:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-29 7:52 gcc at cookiesoft dot de [this message]
2021-03-29 8:01 ` [Bug c/99810] " jakub at gcc dot gnu.org
2021-03-29 8:06 ` rguenth at gcc dot gnu.org
2021-03-29 8:07 ` gcc at cookiesoft dot de
2021-03-29 8:14 ` jakub at gcc dot gnu.org
2021-03-29 8:18 ` gcc at cookiesoft dot de
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