diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -57,6 +57,10 @@
 Non-comprehensive list of changes in this release
 -------------------------------------------------
 
+- For the ARM target, C-language intrinsics are now provided for the full Arm
+  v8.1-M MVE instruction set. ``<arm_mve.h>`` supports the complete API defined
+  in the Arm C Language Extensions.
+
 
 New Compiler Flags
 ------------------
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -72,6 +72,9 @@
 
 During this release ...
 
+* Implemented C-language intrinsics for the full Arm v8.1-M MVE instruction
+  set. ``<arm_mve.h>`` now supports the complete API defined in the Arm C
+  Language Extensions.
 
 Changes to the MIPS Target
 --------------------------