commonlib: Add GCD function
Implement a simple GCD function.
BUG=b:307790895
TEST=emerge-geralt coreboot
TEST=make tests/commonlib/bsd/gcd-test
Change-Id: I21819cda4299b3809b8ca7a95cbdc6a87e4b3481
Signed-off-by: Yidi Lin <yidilin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78798
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/tests/commonlib/bsd/gcd-test.c b/tests/commonlib/bsd/gcd-test.c
new file mode 100644
index 0000000..13fad86
--- /dev/null
+++ b/tests/commonlib/bsd/gcd-test.c
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <commonlib/bsd/gcd.h>
+#include <tests/test.h>
+
+static void test_gcd32(void **state)
+{
+ assert_int_equal(gcd32(17, 11), 1);
+ assert_int_equal(gcd32(64, 36), 4);
+ assert_int_equal(gcd32(90, 123), 3);
+ assert_int_equal(gcd32(65536, 339584), 128);
+ assert_int_equal(gcd32(1, 1), 1);
+ assert_int_equal(gcd32(1, 123), 1);
+ assert_int_equal(gcd32(123, 1), 1);
+ assert_int_equal(gcd32(1, UINT32_MAX), 1);
+ assert_int_equal(gcd32(UINT32_MAX, 1), 1);
+ assert_int_equal(gcd32(UINT32_MAX, UINT32_MAX), UINT32_MAX);
+}
+
+int main(void)
+{
+ const struct CMUnitTest tests[] = {
+ cmocka_unit_test(test_gcd32),
+ };
+
+ return cb_run_group_tests(tests, NULL, NULL);
+}