add release notes for ffp-model and ffp-exception-behavior
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index ba3937d..831ef32 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -66,6 +66,13 @@
attack for x86 architecture through automatic probing of each page of
allocated stack.
+- -ffp-exception-behavior={ignore,maytrap,strict} allows the user to specify
+ the floating-point exception behavior. The default setting is ``ignore``.
+
+- -ffp-model={precise,strict,fast} provides the user an umbrella option to
+ simplify access to the many single purpose floating point options. The default
+ setting is ``precise``.
+
Deprecated Compiler Flags
-------------------------
