1 files changed, 57 insertions, 0 deletions
diff --git a/test/builtins/Unit/modsi3_test.c b/test/builtins/Unit/modsi3_test.c
new file mode 100644
index 0000000000000..52ec9a0ae36b3
--- /dev/null
+++ b/test/builtins/Unit/modsi3_test.c
@@ -0,0 +1,57 @@
+/* ===-- modsi3_test.c - Test __modsi3 -------------------------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file tests __modsi3 for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+#include <stdio.h>
+
+/* Returns: a % b */
+
+si_int __modsi3(si_int a, si_int b);
+
+int test__modsi3(si_int a, si_int b, si_int expected) {
+    si_int x = __modsi3(a, b);
+    if (x != expected)
+        fprintf(stderr, "error in __modsi3: %d %% %d = %d, expected %d\n",
+               a, b, x, expected);
+    return x != expected;
+}
+
+int main() {
+    if (test__modsi3(0, 1, 0))
+        return 1;
+    if (test__modsi3(0, -1, 0))
+        return 1;
+
+    if (test__modsi3(5, 3, 2))
+        return 1;
+    if (test__modsi3(5, -3, 2))
+        return 1;
+    if (test__modsi3(-5, 3, -2))
+        return 1;
+    if (test__modsi3(-5, -3, -2))
+        return 1;
+
+    if (test__modsi3(0x80000000, 1, 0x0))
+        return 1;
+    if (test__modsi3(0x80000000, 2, 0x0))
+        return 1;
+    if (test__modsi3(0x80000000, -2, 0x0))
+        return 1;
+    if (test__modsi3(0x80000000, 3, -2))
+        return 1;
+    if (test__modsi3(0x80000000, -3, -2))
+        return 1;
+
+    return 0;
+}