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* [Bug c++/105578] New: `constexpr` does not work on powerpc
@ 2022-05-12 8:57 liushuyu011 at gmail dot com
2022-05-12 9:27 ` [Bug c++/105578] " pinskia at gcc dot gnu.org
2022-05-12 10:18 ` redi at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: liushuyu011 at gmail dot com @ 2022-05-12 8:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105578
Bug ID: 105578
Summary: `constexpr` does not work on powerpc
Product: gcc
Version: 11.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: liushuyu011 at gmail dot com
Target Milestone: ---
`constexpr` does not work on PowerPC when you use `-mabi=ibmlongdouble`.
Example code (this code snippet is considered well-formed by GCC on other
architectures):
#include <stdint.h>
constexpr long double LD_E =
2.71828182845904523536028747135266249775724709369995;
constexpr long double LD_E_R = 1.0 / LD_E;
GCC will produce an error:
test.c:4:36: error: '(1.0e+0l / 2.71828182845904509079559829842765e+0l)' is not
a constant expression
4 | constexpr long double LD_E_R = 1.0 / LD_E;
| ~~~~^~~~~~
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/105578] `constexpr` does not work on powerpc
2022-05-12 8:57 [Bug c++/105578] New: `constexpr` does not work on powerpc liushuyu011 at gmail dot com
@ 2022-05-12 9:27 ` pinskia at gcc dot gnu.org
2022-05-12 10:18 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-05-12 9:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105578
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
Status|UNCONFIRMED |RESOLVED
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 19779 which I filed over 17 years ago.
*** This bug has been marked as a duplicate of bug 19779 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/105578] `constexpr` does not work on powerpc
2022-05-12 8:57 [Bug c++/105578] New: `constexpr` does not work on powerpc liushuyu011 at gmail dot com
2022-05-12 9:27 ` [Bug c++/105578] " pinskia at gcc dot gnu.org
@ 2022-05-12 10:18 ` redi at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: redi at gcc dot gnu.org @ 2022-05-12 10:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105578
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to shuyu liu from comment #0)
> `constexpr` does not work on PowerPC when you use `-mabi=ibmlongdouble`.
That's a pretty bold claim! **Some** long double arithmetic does not work in
constant expressions.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-05-12 10:18 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-05-12 8:57 [Bug c++/105578] New: `constexpr` does not work on powerpc liushuyu011 at gmail dot com
2022-05-12 9:27 ` [Bug c++/105578] " pinskia at gcc dot gnu.org
2022-05-12 10:18 ` redi at gcc dot gnu.org
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