[gcc(refs/users/meissner/heads/work223-float)] Update ChangeLog.*

[Michael Meissner]

https://gcc.gnu.org/g:f000ffaa08b57319a98da3a3a734891ce984eb58

commit f000ffaa08b57319a98da3a3a734891ce984eb58
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Wed Nov 5 23:10:34 2025 -0500

    Update ChangeLog.*

Diff:
---
 gcc/ChangeLog.float             | 12 ++++++++++++
 libstdc++-v3/ChangeLog.meissner | 11 +----------
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/gcc/ChangeLog.float b/gcc/ChangeLog.float
index 375382ed68e0..525551ab0e24 100644
--- a/gcc/ChangeLog.float
+++ b/gcc/ChangeLog.float
@@ -1,3 +1,15 @@
+==================== Branch work223-float, patch #327 ====================
+
+Note that __bfloat16 and _Float16 are defined in libgcc.
+
+2025-11-05  Michael Meissner  <meissner@linux.ibm.com>
+
+gcc/
+
+	* config/rs6000/rs6000-modes.df (BFmode): Initially define format as 0.
+	* config/rs6000/rs6000.cc (rs6000_libgcc_floating_mode_supported_p):
+	Return true for HFmode and BFmode if -mfloat16.
+
 ==================== Branch work223-float, patch #326 ====================
 
 Document -mfloat16.
diff --git a/libstdc++-v3/ChangeLog.meissner b/libstdc++-v3/ChangeLog.meissner
index 1e13edb48fc1..f24771d05dc8 100644
--- a/libstdc++-v3/ChangeLog.meissner
+++ b/libstdc++-v3/ChangeLog.meissner
@@ -1,13 +1,4 @@
-==================== Branch work223-float, patch #319 ====================
-
-Fix __bfloat16 signalling NaN support on PowerPC.
-
-2025-10-31  Michael Meissner  <meissner@linux.ibm.com>
-
-libstdc++-v3/
-
-	* include/limits (__bfloat16 signaling_NaN): Use __builtin_nansf and
-	convert it to __bfloat16 instead of using __builtin_nansf16b.
+==================== Branch work223-float, patch #319 was reverted ====================
 
 ==================== Branch work223, baseline ====================