[gcc(refs/users/meissner/heads/work097)] Revert patch.

[Michael Meissner <meissner@gcc.gnu.org>]

https://gcc.gnu.org/g:3dfe6754647f527dbe49bdbc1e34c065276ad537

commit 3dfe6754647f527dbe49bdbc1e34c065276ad537
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu Aug 11 22:39:09 2022 -0400

    Revert patch.
    
    2022-08-11   Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            Revert patches.
            * config/rs6000/rs6000-builtin.cc (rs6000_init_builtins): Always use the
            _Float128 type for __float128.  Don't use the long double type.
            * ChangeLog.meissner: Update.

Diff:
---
 gcc/ChangeLog.meissner              | 11 +----------
 gcc/config/rs6000/rs6000-builtin.cc |  8 ++++----
 2 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner
index 2e6a3764991..4ae59e38377 100644
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@ -1,13 +1,4 @@
-==================== work097, patch008
-
-Make __float128 use the _Float128 type.
-
-2022-08-11   Michael Meissner  <meissner@linux.ibm.com>
-
-gcc/
-
-	* config/rs6000/rs6000-builtin.cc (rs6000_init_builtins): Always use the
-	_Float128 type for __float128.  Don't use the long double type.
+==================== work097, patch008 was reverted
 
 ==================== work097, patch007
 
diff --git a/gcc/config/rs6000/rs6000-builtin.cc b/gcc/config/rs6000/rs6000-builtin.cc
index 1cc97fa49b3..e34a8f0cebf 100644
--- a/gcc/config/rs6000/rs6000-builtin.cc
+++ b/gcc/config/rs6000/rs6000-builtin.cc
@@ -733,10 +733,10 @@ rs6000_init_builtins (void)
 
   if (TARGET_FLOAT128_TYPE)
     {
-      /* Always make the type used by __float128 to be the same as the
-	 _Float128 type.  The C23 standard will want long double to be a
-	 different type than _Float128, so don't use the long double type.  */
-      ieee128_float_type_node = float128_type_node;
+      if (TARGET_IEEEQUAD && TARGET_LONG_DOUBLE_128)
+	ieee128_float_type_node = long_double_type_node;
+      else
+	ieee128_float_type_node = float128_type_node;
       t = build_qualified_type (ieee128_float_type_node, TYPE_QUAL_CONST);
       lang_hooks.types.register_builtin_type (ieee128_float_type_node,
 					      "__ieee128");