diff --git a/.gitmodules b/.gitmodules
index e4ae0c1c16..508f0c1828 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "CryptoPkg/Library/OpensslLib/openssl"]
 	path = CryptoPkg/Library/OpensslLib/openssl
 	url = https://github.com/openssl/openssl
+[submodule "SoftFloat"]
+	path = ArmPkg/Library/ArmSoftFloatLib/berkeley-softfloat-3
+	url = https://github.com/ucb-bar/berkeley-softfloat-3.git
diff --git a/ArmPkg/Library/ArmSoftFloatLib/berkeley-softfloat-3 b/ArmPkg/Library/ArmSoftFloatLib/berkeley-softfloat-3
new file mode 160000
index 0000000000..b64af41c32
--- /dev/null
+++ b/ArmPkg/Library/ArmSoftFloatLib/berkeley-softfloat-3
@@ -0,0 +1 @@
+Subproject commit b64af41c3276f97f0e181920400ee056b9c88037