diff --git a/.gitmodules b/.gitmodules
index c07a19fe0..266587377 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -26,3 +26,6 @@
 [submodule "addins/riscv-arch-test"]
 	path = addins/riscv-arch-test
 	url = https://github.com/riscv-non-isa/riscv-arch-test
+[submodule "addins/branch-predictor-simulator"]
+	path = addins/branch-predictor-simulator
+	url = https://github.com/ross144/branch-predictor-simulator
diff --git a/addins/branch-predictor-simulator b/addins/branch-predictor-simulator
new file mode 160000
index 000000000..3e424e902
--- /dev/null
+++ b/addins/branch-predictor-simulator
@@ -0,0 +1 @@
+Subproject commit 3e424e902f2088d0c9f482f3900ab780affb6350