diff --git a/src/backend/prelisp.py b/src/backend/prelisp.py
new file mode 100644
index 0000000..f67358b
--- /dev/null
+++ b/src/backend/prelisp.py
@@ -0,0 +1,70 @@
+import sys
+import json
+import importlib
+import os
+
+sys.path.append(os.getcwd())
+
+
+def prelisp(expr, module_name):
+    assert isinstance(module_name, str) and module_name.endswith(".py")
+    module = importlib.import_module(module_name[: -len(".py")])
+    return preprocess(expr, module)[0]
+
+
+def preprocess(expr, env):
+    if isinstance(expr, list):
+        if expr[0] == "unquote":
+            assert len(expr) == 2
+            return expand_macro(expr[1], env), "append"
+        elif expr[0] == 'unquote-splicing':
+            assert len(expr) == 2
+            out = expand_macro(expr[1], env)
+            assert isinstance(out, list)
+            return out, "extend"
+        else:
+            res = []
+            for x in expr:
+                out, mode = preprocess(x, env)
+                if mode == 'append':
+                    res.append(out)
+                else:
+                    res.extend(out)
+            
+            return res, "append"
+    else:
+        return expr, "append"
+
+
+def expand_macro(expr, env):
+    if isinstance(expr, list):
+        fn_name, fn_args = expr[0], expr[1:]
+        fn = getattr(env, fn_name)
+        expr_out = fn(*fn_args)
+        return clean_python_output(expr_out)
+    elif isinstance(expr, str):
+        var = expr
+        expr_out = getattr(env, var)
+        return clean_python_output(expr_out)
+    else:
+        raise Exception("Unknown macro")
+
+
+def clean_python_output(x):
+    return json.loads(json.dumps(x))
+
+
+def main(mod_name):
+    expr = json.load(sys.stdin)
+    print(json.dumps(prelisp(expr, mod_name)))
+
+
+if __name__ == "__main__":
+    import argparse
+
+    parser = argparse.ArgumentParser(description="What the program does")
+    parser.add_argument(
+        "macro_module", help="python file with entry for macro functions"
+    )
+    args = parser.parse_args()
+    main(args.macro_module)
diff --git a/src/backend/tests/prelisp/first.out b/src/backend/tests/prelisp/first.out
new file mode 100644
index 0000000..618f927
--- /dev/null
+++ b/src/backend/tests/prelisp/first.out
@@ -0,0 +1,9 @@
+(c-lisp
+  (define ((error_check void) (res int))
+    (if (gt res 0) (call exit 1))
+    (ret res))
+  (define ((main int))
+    (declare res int)
+    (declare res float)
+    (set res (call error (call print 3)))
+    (ret 0)))
diff --git a/src/backend/tests/prelisp/first.sexp b/src/backend/tests/prelisp/first.sexp
new file mode 100644
index 0000000..a81ff88
--- /dev/null
+++ b/src/backend/tests/prelisp/first.sexp
@@ -0,0 +1,11 @@
+(c-lisp
+    (define ((error_check void) (res int))
+        (if (gt res 0)
+            (call exit 1))
+        (ret res))
+
+    (define ((main int))
+        (declare res ,cudevice)
+        (declare res ,(cudevice2))
+        (set res ,(myError (call print 5)))
+        (ret 0)))
diff --git a/src/backend/tests/prelisp/includes.out b/src/backend/tests/prelisp/includes.out
new file mode 100644
index 0000000..4017b49
--- /dev/null
+++ b/src/backend/tests/prelisp/includes.out
@@ -0,0 +1,7 @@
+(c-lisp
+  (define ((print int) (n int)))
+  (define ((fprint float) (n float)))
+  (define ((main int))
+    (if #t ((call print 1) (call print 2)))
+    (if #f ((call print 0)) ((call print 3)))
+    (ret 0)))
diff --git a/src/backend/tests/prelisp/includes.sexp b/src/backend/tests/prelisp/includes.sexp
new file mode 100644
index 0000000..bd7a037
--- /dev/null
+++ b/src/backend/tests/prelisp/includes.sexp
@@ -0,0 +1,12 @@
+(c-lisp
+    ,@(add_print_includes)
+
+    (define ((main int))
+        (if #t
+            ((call print 1)
+             (call print 2)))
+
+        (if #f
+            ((call print 0))
+            ((call print 3)))
+             (ret 0)))
diff --git a/src/backend/tests/prelisp/macros.py b/src/backend/tests/prelisp/macros.py
new file mode 100644
index 0000000..814b306
--- /dev/null
+++ b/src/backend/tests/prelisp/macros.py
@@ -0,0 +1,40 @@
+cudevice = "int"
+cuptr = ["ptr", "int"]
+
+
+def cudevice2():
+    return "float"
+
+
+def myError(expr):
+    expr[-1] = 3
+    return ("call", "error", expr)
+
+
+def add_print_includes():
+    return [
+        ("define", (("print", "int"), ("n", "int"))),
+        ("define", (("fprint", "float"), ("n", "float"))),
+    ]
+
+
+def init_zeros(c, ldc):
+    out = []
+    for i in range(4):
+        for j in range(4):
+            ln = ("store", ("ptradd", c, ("add", i, ("mul", j, ldc))), 0.0)
+            out.append(ln)
+    return out
+
+
+def store_vals(p, a, b, c, lda, ldb, ldc):
+    out = []
+    for i in range(4):
+        for j in range(4):
+            c_ij = ("ptradd", "c", ("add", i, ("mul", j, "ldc")))
+            a_ip = ("ptradd", "a", ("add", i, ("mul", p, "lda")))
+            b_pj = ("ptradd", "b", ("add", p, ("mul", j, "ldb")))
+            ln = ("store", c_ij, ("fadd", ("load", c_ij), ("fmul", ("load", a_ip), ("load", b_pj))))
+            out.append(ln)
+    
+    return out
diff --git a/src/backend/tests/prelisp/mmult.out b/src/backend/tests/prelisp/mmult.out
new file mode 100644
index 0000000..9b73086
--- /dev/null
+++ b/src/backend/tests/prelisp/mmult.out
@@ -0,0 +1,117 @@
+(c-lisp
+  (define ((__add_dot4x4 void)
+           (k int)
+           (a (ptr float))
+           (lda int)
+           (b (ptr float))
+           (ldb int)
+           (c (ptr float))
+           (ldc int))
+    (store (ptradd c (add 0 (mul 0 ldc))) 0)
+    (store (ptradd c (add 0 (mul 1 ldc))) 0)
+    (store (ptradd c (add 0 (mul 2 ldc))) 0)
+    (store (ptradd c (add 0 (mul 3 ldc))) 0)
+    (store (ptradd c (add 1 (mul 0 ldc))) 0)
+    (store (ptradd c (add 1 (mul 1 ldc))) 0)
+    (store (ptradd c (add 1 (mul 2 ldc))) 0)
+    (store (ptradd c (add 1 (mul 3 ldc))) 0)
+    (store (ptradd c (add 2 (mul 0 ldc))) 0)
+    (store (ptradd c (add 2 (mul 1 ldc))) 0)
+    (store (ptradd c (add 2 (mul 2 ldc))) 0)
+    (store (ptradd c (add 2 (mul 3 ldc))) 0)
+    (store (ptradd c (add 3 (mul 0 ldc))) 0)
+    (store (ptradd c (add 3 (mul 1 ldc))) 0)
+    (store (ptradd c (add 3 (mul 2 ldc))) 0)
+    (store (ptradd c (add 3 (mul 3 ldc))) 0)
+    (for ((set p 0) (lt p k) (set p (add p 1)))
+         (store (ptradd c (add 0 (mul 0 ldc)))
+                (fadd (load (ptradd c (add 0 (mul 0 ldc))))
+                      (fmul (load (ptradd a (add 0 (mul p lda))))
+                            (load (ptradd b (add p (mul 0 ldb)))))))
+         (store (ptradd c (add 0 (mul 1 ldc)))
+                (fadd (load (ptradd c (add 0 (mul 1 ldc))))
+                      (fmul (load (ptradd a (add 0 (mul p lda))))
+                            (load (ptradd b (add p (mul 1 ldb)))))))
+         (store (ptradd c (add 0 (mul 2 ldc)))
+                (fadd (load (ptradd c (add 0 (mul 2 ldc))))
+                      (fmul (load (ptradd a (add 0 (mul p lda))))
+                            (load (ptradd b (add p (mul 2 ldb)))))))
+         (store (ptradd c (add 0 (mul 3 ldc)))
+                (fadd (load (ptradd c (add 0 (mul 3 ldc))))
+                      (fmul (load (ptradd a (add 0 (mul p lda))))
+                            (load (ptradd b (add p (mul 3 ldb)))))))
+         (store (ptradd c (add 1 (mul 0 ldc)))
+                (fadd (load (ptradd c (add 1 (mul 0 ldc))))
+                      (fmul (load (ptradd a (add 1 (mul p lda))))
+                            (load (ptradd b (add p (mul 0 ldb)))))))
+         (store (ptradd c (add 1 (mul 1 ldc)))
+                (fadd (load (ptradd c (add 1 (mul 1 ldc))))
+                      (fmul (load (ptradd a (add 1 (mul p lda))))
+                            (load (ptradd b (add p (mul 1 ldb)))))))
+         (store (ptradd c (add 1 (mul 2 ldc)))
+                (fadd (load (ptradd c (add 1 (mul 2 ldc))))
+                      (fmul (load (ptradd a (add 1 (mul p lda))))
+                            (load (ptradd b (add p (mul 2 ldb)))))))
+         (store (ptradd c (add 1 (mul 3 ldc)))
+                (fadd (load (ptradd c (add 1 (mul 3 ldc))))
+                      (fmul (load (ptradd a (add 1 (mul p lda))))
+                            (load (ptradd b (add p (mul 3 ldb)))))))
+         (store (ptradd c (add 2 (mul 0 ldc)))
+                (fadd (load (ptradd c (add 2 (mul 0 ldc))))
+                      (fmul (load (ptradd a (add 2 (mul p lda))))
+                            (load (ptradd b (add p (mul 0 ldb)))))))
+         (store (ptradd c (add 2 (mul 1 ldc)))
+                (fadd (load (ptradd c (add 2 (mul 1 ldc))))
+                      (fmul (load (ptradd a (add 2 (mul p lda))))
+                            (load (ptradd b (add p (mul 1 ldb)))))))
+         (store (ptradd c (add 2 (mul 2 ldc)))
+                (fadd (load (ptradd c (add 2 (mul 2 ldc))))
+                      (fmul (load (ptradd a (add 2 (mul p lda))))
+                            (load (ptradd b (add p (mul 2 ldb)))))))
+         (store (ptradd c (add 2 (mul 3 ldc)))
+                (fadd (load (ptradd c (add 2 (mul 3 ldc))))
+                      (fmul (load (ptradd a (add 2 (mul p lda))))
+                            (load (ptradd b (add p (mul 3 ldb)))))))
+         (store (ptradd c (add 3 (mul 0 ldc)))
+                (fadd (load (ptradd c (add 3 (mul 0 ldc))))
+                      (fmul (load (ptradd a (add 3 (mul p lda))))
+                            (load (ptradd b (add p (mul 0 ldb)))))))
+         (store (ptradd c (add 3 (mul 1 ldc)))
+                (fadd (load (ptradd c (add 3 (mul 1 ldc))))
+                      (fmul (load (ptradd a (add 3 (mul p lda))))
+                            (load (ptradd b (add p (mul 1 ldb)))))))
+         (store (ptradd c (add 3 (mul 2 ldc)))
+                (fadd (load (ptradd c (add 3 (mul 2 ldc))))
+                      (fmul (load (ptradd a (add 3 (mul p lda))))
+                            (load (ptradd b (add p (mul 2 ldb)))))))
+         (store (ptradd c (add 3 (mul 3 ldc)))
+                (fadd (load (ptradd c (add 3 (mul 3 ldc))))
+                      (fmul (load (ptradd a (add 3 (mul p lda))))
+                            (load (ptradd b (add p (mul 3 ldb))))))))
+    (ret))
+  (define ((__kernel void)
+           (a (ptr float))
+           (b (ptr float))
+           (c (ptr float))
+           (m int)
+           (n int)
+           (k int))
+    (declare i int)
+    (declare j int)
+    (declare lda int)
+    (declare ldb int)
+    (declare ldc int)
+    (set lda m)
+    (set ldb n)
+    (set ldc k)
+    (for ((set j 0) (lt j n) (set j (add j 4)))
+         (for ((set i 0) (lt i m) (set i (add i 4)))
+              (call __add_dot4x4
+                    k
+                    (ptradd a (add i (mul 0 lda)))
+                    lda
+                    (ptradd b (mul j ldb))
+                    ldb
+                    (ptradd c (add i (mul j ldc)))
+                    ldc)))
+    (ret)))
diff --git a/src/backend/tests/prelisp/mmult.sexp b/src/backend/tests/prelisp/mmult.sexp
new file mode 100644
index 0000000..e77ed81
--- /dev/null
+++ b/src/backend/tests/prelisp/mmult.sexp
@@ -0,0 +1,45 @@
+(c-lisp
+    ;; Function to add dot products for a 4x4 block
+    (define ((__add_dot4x4 void)
+            (k int)
+            (a (ptr float))
+            (lda int)
+            (b (ptr float))
+            (ldb int)
+            (c (ptr float))
+            (ldc int))
+
+        ,@(init_zeros c ldc)
+
+        (for ((set p 0) (lt p k) (set p (add p 1)))
+            ,@(store_vals p a b c lda ldb ldc))
+
+        (ret))
+        
+    
+    (define ((__kernel void)
+            (a (ptr float))
+            (b (ptr float))
+            (c (ptr float))
+            (m int)
+            (n int)
+            (k int))
+
+        (declare i int)
+        (declare j int)
+
+        (declare lda int)
+        (declare ldb int)
+        (declare ldc int)
+
+        (set lda m)
+        (set ldb n)
+        (set ldc k)
+
+        (for ((set j 0) (lt j n) (set j (add j 4)))
+            (for ((set i 0) (lt i m) (set i (add i 4)))
+                (call __add_dot4x4 k 
+                    (ptradd a (add i (mul 0 lda))) lda 
+                    (ptradd b (mul j ldb)) ldb
+                    (ptradd c (add i (mul j ldc))) ldc)))
+        (ret)))
diff --git a/src/backend/tests/prelisp/turnt.toml b/src/backend/tests/prelisp/turnt.toml
new file mode 100644
index 0000000..a9a42c9
--- /dev/null
+++ b/src/backend/tests/prelisp/turnt.toml
@@ -0,0 +1 @@
+command = "guile ../../utils/sexp-json.scm < {filename} | python ../../prelisp.py macros.py | guile ../../utils/json-sexp.scm" 
\ No newline at end of file