[gcc(refs/users/meissner/heads/work042)] Update ChangeLog.meissner.

[Michael Meissner]

https://gcc.gnu.org/g:096175d6a9339fb39d81502f7f1bf6a9d933aec7

commit 096175d6a9339fb39d81502f7f1bf6a9d933aec7
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Tue Mar 23 16:03:02 2021 -0400

    Update ChangeLog.meissner.
    
    gcc/
    2021-03-23  Michael Meissner  <meissner@linux.ibm.com>
    
            * ChangeLog.meissner: Update.

Diff:
---
 gcc/ChangeLog.meissner | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner
index 74cb8436a4f..0ebaf65c19a 100644
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@ -1,3 +1,25 @@
+work042.patch026:
+2021-03-23  Michael Meissner  <meissner@linux.ibm.com>
+
+	PR fortran/96983
+	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Add more
+	debugging for __float128, __ibm128 support.
+	(rs6000_option_override_internal): Do not enable __float128 and
+	__ibm128 support for Fortran.  On Fortran, make the default long
+	double precision to be 128.  Add error messages if the user tries
+	to change the long double type between IBM/IEEE on Fortran.
+	(rs6000_init_libfuncs): Do not enable __ibm128 support if it is
+	disabled.
+	* config/rs6000/rs6000.h (FLOAT128_IBM_P): Do not return true if
+	__ibm128 was disabled for IFmode/ICmode.
+	(TARGET_IBM128): Move this to rs6000.opt.
+	* config/rs6000/rs6000.md (FP iterator): Do not enable IF mode if
+	__ibm128 is disabled.
+	(FLOAT128 iterator): Likewise.
+	* config/rs6000/rs6000.opt (x_TARGET_IBM128): New variables to
+	record whether __ibm128 is supported or not.
+	(TARGET_IBM128): Likewise.
+
 work042.patch025:
 2021-03-19  Michael Meissner  <meissner@linux.ibm.com>