[gcc(refs/users/meissner/heads/work095)] Update ChangeLog.meissner.

[Michael Meissner]

https://gcc.gnu.org/g:0b82940fb9e538c650d7905562637a42b6688743

commit 0b82940fb9e538c650d7905562637a42b6688743
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Thu Jul 28 18:31:22 2022 -0400

    Update ChangeLog.meissner.
    
    2022-07-28   Michael Meissner  <meissner@linux.ibm.com>
    
    gcc/
    
            * ChangeLog.meissner: Update.

Diff:
---
 gcc/ChangeLog.meissner | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/gcc/ChangeLog.meissner b/gcc/ChangeLog.meissner
index 4983749b0a5..e559837a29f 100644
--- a/gcc/ChangeLog.meissner
+++ b/gcc/ChangeLog.meissner
@@ -1,3 +1,37 @@
+==================== work095, patch #12.
+
+Enable using overload built-ins for 128-bit floating point.
+
+2022-07-28   Michael Meissner  <meissner@linux.ibm.com>
+
+gcc/
+
+	* config/rs6000/rs6000-builtin.cc (rs6000_expand_builtin): Remove all
+	of the code that changed KFmode built-in functions into TFmode, since
+	these functions now support overloading between KFmode and TFmode.
+	* config/rs6000/rs6000-c.cc (rs6000_builtin_type_compatible):
+	Don't consider _Float128 and long double under
+	-mabi=ieeelongdouble to be compatible for built-in functions.  Use
+	overloading instead.
+	* config/rs6000/rs6000.md (IFKF): Delete.
+	(IFKF_reg): Delete.
+	(@extenddf<mode>2_fprs): Remove extra test for
+	TARGET_LONG_DOUBLE_128.
+	(@extenddf<mode2>_vsx): Likewise.
+	(extendiftf2): Allow __ibm128 even if _Float128 is not supported.
+	(extendkfif2): New insn.
+	(extendtfkf2): Allow __ibm128 even if _Float128 is not supported.
+	(extendtfif2): Likewise.
+	(trunckfif2): New insn.
+	(trunctfif2): Allow __ibm128 even if _Float128 is not supported.
+	(extendkftf2_internal): Split extend<mode>tf2_internal and
+	extendtf<mode>2_internal into separate insns that handle either
+	conversions between IEEE 128-bit types or between IBM 128-bit types.
+	Set the type and insn length correctly.
+	(extendtfkf2_internal): Likewise.
+	(extendiftf2_internal): Likewise.
+	(extendtfif2_internal): Likewise.
+
 ==================== work095, patch #11.
 
 Make __float128 and __ibm128 use different types from long double.