[PATCH] Allow other languages to change long double format on PowerPC

[PATCH] Allow other languages to change long double format on PowerPC

[Michael Meissner]

Allow other languages to change long double format on PowerPC.

With Fortran adding support for changing the long double format, this
patch removes the code that only allowed C/C++ to change the long double
format for GLIBC 2.32 and later without a warning.

I have bootstraped the compiler with this change and there where no
regressesion.  In addition, I have applied it to the power-ieee128 branch where
the work is being done to add support for both types of 128-bit floating point
on PowerPC.  If I build a compiler from that branch, I can change the 128-bit
floating point format at compile time.

Can I check this patch into the trunk GCC compiler?

gcc/
2022-01-12  Michael Meissner  <meissner@the-meissners.org>

	* config/rs6000/rs6000.c (rs6000_option_override_internal): Remove
	checks for only C/C++ front ends before allowing the long double
	format to change without a warning.
---
 gcc/config/rs6000/rs6000.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 319182e94d9..0e3481c8327 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -4221,13 +4221,11 @@ rs6000_option_override_internal (bool global_init_p)
       if (rs6000_ieeequad != TARGET_IEEEQUAD_DEFAULT && TARGET_LONG_DOUBLE_128)
 	{
 	  /* Determine if the user can change the default long double type at
-	     compilation time.  Only C and C++ support this, and you need GLIBC
-	     2.32 or newer.  Only issue one warning.  */
+	     compilation time.  You need GLIBC 2.32 or newer to be able to
+	     change the long double type.  Only issue one warning.  */
 	  static bool warned_change_long_double;
 
-	  if (!warned_change_long_double
-	      && (!glibc_supports_ieee_128bit ()
-		  || (!lang_GNU_C () && !lang_GNU_CXX ())))
+	  if (!warned_change_long_double && !glibc_supports_ieee_128bit ())
 	    {
 	      warned_change_long_double = true;
 	      if (TARGET_IEEEQUAD)
-- 
2.33.1


-- 
Michael Meissner, IBM
PO Box 98, Ayer, Massachusetts, USA, 01432
email: meissner@linux.ibm.com

Re: [PATCH] Allow other languages to change long double format on PowerPC

[Jakub Jelinek]

On Wed, Jan 12, 2022 at 12:46:16PM -0500, Michael Meissner via Gcc-patches wrote:
> Allow other languages to change long double format on PowerPC.
> 
> With Fortran adding support for changing the long double format, this
> patch removes the code that only allowed C/C++ to change the long double
> format for GLIBC 2.32 and later without a warning.
> 
> I have bootstraped the compiler with this change and there where no
> regressesion.  In addition, I have applied it to the power-ieee128 branch where
> the work is being done to add support for both types of 128-bit floating point
> on PowerPC.  If I build a compiler from that branch, I can change the 128-bit
> floating point format at compile time.
> 
> Can I check this patch into the trunk GCC compiler?
> 
> gcc/
> 2022-01-12  Michael Meissner  <meissner@the-meissners.org>
> 
> 	* config/rs6000/rs6000.c (rs6000_option_override_internal): Remove
> 	checks for only C/C++ front ends before allowing the long double
> 	format to change without a warning.

This is already on the trunk, I've merged the power-ieee128 branch changes
into trunk yesterday (r12-6491 through r12-6508 commits inclusive).
This patch in particular as r12-6503-g7d8011fa00fca283003c84e23a8ca66286f83dfa.

	Jakub

Re: [PATCH] Allow other languages to change long double format on PowerPC

[Michael Meissner]

On Wed, Jan 12, 2022 at 06:50:04PM +0100, Jakub Jelinek wrote:
> On Wed, Jan 12, 2022 at 12:46:16PM -0500, Michael Meissner via Gcc-patches wrote:
> > Allow other languages to change long double format on PowerPC.
> > 
> > With Fortran adding support for changing the long double format, this
> > patch removes the code that only allowed C/C++ to change the long double
> > format for GLIBC 2.32 and later without a warning.
> > 
> > I have bootstraped the compiler with this change and there where no
> > regressesion.  In addition, I have applied it to the power-ieee128 branch where
> > the work is being done to add support for both types of 128-bit floating point
> > on PowerPC.  If I build a compiler from that branch, I can change the 128-bit
> > floating point format at compile time.
> > 
> > Can I check this patch into the trunk GCC compiler?
> > 
> > gcc/
> > 2022-01-12  Michael Meissner  <meissner@the-meissners.org>
> > 
> > 	* config/rs6000/rs6000.c (rs6000_option_override_internal): Remove
> > 	checks for only C/C++ front ends before allowing the long double
> > 	format to change without a warning.
> 
> This is already on the trunk, I've merged the power-ieee128 branch changes
> into trunk yesterday (r12-6491 through r12-6508 commits inclusive).
> This patch in particular as r12-6503-g7d8011fa00fca283003c84e23a8ca66286f83dfa.

Thanks.  I didn't notice that the patches had been merged into the trunk.

-- 
Michael Meissner, IBM
PO Box 98, Ayer, Massachusetts, USA, 01432
email: meissner@linux.ibm.com