diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1af3c9c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.DS_store
+a.out
+build
+target
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b4c921d
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "hash/cpu/src/zikkurat-algebra"]
+	path = hash/cpu/src/zikkurat-algebra
+	url = https://github.com/faulhornlabs/zikkurat-algebra
+[submodule "hash/cpu/src/HorizenLabs-poseidon2"]
+	path = hash/cpu/src/HorizenLabs-poseidon2
+	url = https://github.com/HorizenLabs/poseidon2
diff --git a/hash/cpu/src/HorizenLabs-poseidon2 b/hash/cpu/src/HorizenLabs-poseidon2
new file mode 160000
index 0000000..bb476b9
--- /dev/null
+++ b/hash/cpu/src/HorizenLabs-poseidon2
@@ -0,0 +1 @@
+Subproject commit bb476b9ca38198cf5092487283c8b8c5d4317c4e
diff --git a/hash/cpu/src/README.md b/hash/cpu/src/README.md
new file mode 100644
index 0000000..e8e462f
--- /dev/null
+++ b/hash/cpu/src/README.md
@@ -0,0 +1,2 @@
+
+Sources for various third-party libraries we benchmark, added as git submodules.
diff --git a/hash/cpu/src/zikkurat-algebra b/hash/cpu/src/zikkurat-algebra
new file mode 160000
index 0000000..e2b0fde
--- /dev/null
+++ b/hash/cpu/src/zikkurat-algebra
@@ -0,0 +1 @@
+Subproject commit e2b0fde371dad9a8be2085ca809d08e11bf4eba9