Add changelog.

Signed-off-by: Matthias Schulz <mschulz@hilscher.com>
diff --git a/ChangeLog.d/gcm-large-tables.txt b/ChangeLog.d/gcm-large-tables.txt
new file mode 100644
index 0000000..84f9c14
--- /dev/null
+++ b/ChangeLog.d/gcm-large-tables.txt
@@ -0,0 +1,4 @@
+Features
+    * Add support for 8-bit GCM tables for Shoup's algorithm to speedup GCM
+      operations when hardware accelerated AES is not present (27-34% on 64-bit
+      Intel, 125-127% on ARMv7)