[libstdc++] [testsuite] xfail dbl from_chars for aarch64 rtems ldbl

[libstdc++] [testsuite] xfail dbl from_chars for aarch64 rtems ldbl

[Alexandre Oliva]

rtems, like vxworks, uses fast-float doubles for from_chars even for
long double, so it loses precision, so expect the long double bits to
fail on aarch64.

Regstrapped on x86_64-linux-gnu, also tested on aarch64-rtems6.  Ok to
install?


for  libstdc++-v3/ChangeLog

	* testsuite/20_util/from_chars/4.cc: Skip long double on
	aarch64-rtems.
---
 libstdc++-v3/testsuite/20_util/from_chars/4.cc |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/testsuite/20_util/from_chars/4.cc b/libstdc++-v3/testsuite/20_util/from_chars/4.cc
index 206e18daeb229..76e07df9d2bf3 100644
--- a/libstdc++-v3/testsuite/20_util/from_chars/4.cc
+++ b/libstdc++-v3/testsuite/20_util/from_chars/4.cc
@@ -18,7 +18,7 @@
 // <charconv> is supported in C++14 as a GNU extension
 // { dg-do run { target c++14 } }
 // { dg-add-options ieee }
-// { dg-additional-options "-DSKIP_LONG_DOUBLE" { target aarch64-*-vxworks* x86_64-*-vxworks* } }
+// { dg-additional-options "-DSKIP_LONG_DOUBLE" { target aarch64-*-rtems* aarch64-*-vxworks* x86_64-*-vxworks* } }
 
 #include <charconv>
 #include <string>

-- 
Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
   Free Software Activist                       GNU Toolchain Engineer
Disinformation flourishes because many people care deeply about injustice
but very few check the facts.  Ask me about <https://stallmansupport.org>

Re: [libstdc++] [testsuite] xfail dbl from_chars for aarch64 rtems ldbl

[Jonathan Wakely]

[-- Attachment #1: Type: text/plain, Size: 1592 bytes --]

On Thu, 15 Jun 2023, 01:49 Alexandre Oliva via Libstdc++, <
libstdc++@gcc.gnu.org> wrote:

>
> rtems, like vxworks, uses fast-float doubles for from_chars even for
> long double, so it loses precision, so expect the long double bits to
> fail on aarch64.
>
> Regstrapped on x86_64-linux-gnu, also tested on aarch64-rtems6.  Ok to
> install?
>

OK, thanks



>
> for  libstdc++-v3/ChangeLog
>
>         * testsuite/20_util/from_chars/4.cc: Skip long double on
>         aarch64-rtems.
> ---
>  libstdc++-v3/testsuite/20_util/from_chars/4.cc |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libstdc++-v3/testsuite/20_util/from_chars/4.cc
> b/libstdc++-v3/testsuite/20_util/from_chars/4.cc
> index 206e18daeb229..76e07df9d2bf3 100644
> --- a/libstdc++-v3/testsuite/20_util/from_chars/4.cc
> +++ b/libstdc++-v3/testsuite/20_util/from_chars/4.cc
> @@ -18,7 +18,7 @@
>  // <charconv> is supported in C++14 as a GNU extension
>  // { dg-do run { target c++14 } }
>  // { dg-add-options ieee }
> -// { dg-additional-options "-DSKIP_LONG_DOUBLE" { target
> aarch64-*-vxworks* x86_64-*-vxworks* } }
> +// { dg-additional-options "-DSKIP_LONG_DOUBLE" { target aarch64-*-rtems*
> aarch64-*-vxworks* x86_64-*-vxworks* } }
>
>  #include <charconv>
>  #include <string>
>
> --
> Alexandre Oliva, happy hacker                https://FSFLA.org/blogs/lxo/
>    Free Software Activist                       GNU Toolchain Engineer
> Disinformation flourishes because many people care deeply about injustice
> but very few check the facts.  Ask me about <https://stallmansupport.org>
>