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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/98577] Wrong "count_rate" values with int32 and real32 if the "count" argument is int64.
Date: Fri, 08 Jan 2021 16:12:55 +0000 [thread overview]
Message-ID: <bug-98577-4-ncqF5HRx8n@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-98577-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98577
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|WONTFIX |INVALID
--- Comment #14 from kargl at gcc dot gnu.org ---
(In reply to Chinoune from comment #12)
> First example:
>
> $ ifort bug_gcc_tic.f90 -o test.x
> $ ./test.x
> count(int_32):
> count_rate(int32) = 10000
> count_rate(int64) = 10000
> count_rate(real32) = 10000.00
> count_rate(real64) = 10000.0000000000
> count(int_64):
> count_rate(int32) = 1000000
> count_rate(int64) = 1000000
> count_rate(real32) = 1000000.
> count_rate(real64) = 1000000.00000000
>
> Unlike gfortran, count_rate with ifort depends only on the precision of the
> first argument of system_clock. It doesn't mixup.
That is not required by the Fortran Standard, but conforms because
COUNT and COUNT_RATE are processor-dependent.
I also took the opportunity to look at the Intel Fortran documentation at
https://software.intel.com/content/www/us/en/develop/documentation/fortran-compiler-oneapi-dev-guide-and-reference/top/language-reference/a-to-z-reference/s-1/system-clock.html
dated 4 dec 2020. Note, the following hightlighted sentence on
that page:
"All integer arguments used must have the same integer kind parameter."
That is not required by Fortran Standard. Why would Intel require
compatible kind type parameters? Your program in comment #0 does
meet the requirements placed on system_clock() by Intel.
next prev parent reply other threads:[~2021-01-08 16:12 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-07 4:12 [Bug fortran/98577] New: " mehdi.chinoune at hotmail dot com
2021-01-07 11:36 ` [Bug fortran/98577] " anlauf at gcc dot gnu.org
2021-01-07 13:03 ` mehdi.chinoune at hotmail dot com
2021-01-07 16:32 ` kargl at gcc dot gnu.org
2021-01-07 17:28 ` mehdi.chinoune at hotmail dot com
2021-01-07 18:01 ` sgk at troutmask dot apl.washington.edu
2021-01-07 18:49 ` mehdi.chinoune at hotmail dot com
2021-01-07 18:56 ` mehdi.chinoune at hotmail dot com
2021-01-07 20:27 ` sgk at troutmask dot apl.washington.edu
2021-01-07 20:37 ` kargl at gcc dot gnu.org
2021-01-08 6:18 ` mehdi.chinoune at hotmail dot com
2021-01-08 7:21 ` kargl at gcc dot gnu.org
2021-01-08 8:04 ` mehdi.chinoune at hotmail dot com
2021-01-08 8:27 ` mehdi.chinoune at hotmail dot com
2021-01-08 16:12 ` kargl at gcc dot gnu.org [this message]
2021-01-08 16:42 ` mehdi.chinoune at hotmail dot com
2021-01-08 16:59 ` kargl at gcc dot gnu.org
2021-01-08 18:43 ` mehdi.chinoune at hotmail dot com
2021-01-08 18:55 ` sgk at troutmask dot apl.washington.edu
2021-01-08 19:19 ` sgk at troutmask dot apl.washington.edu
2021-01-09 2:34 ` mehdi.chinoune at hotmail dot com
2021-01-09 3:43 ` kargl at gcc dot gnu.org
2021-01-09 9:00 ` tkoenig at gcc dot gnu.org
2023-05-14 16:01 ` mehdi.chinoune at hotmail dot com
2023-05-14 16:37 ` tkoenig at gcc dot gnu.org
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