tests: Add unit tests for mulu64 and muls64

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/tests/test-mul64.c b/tests/test-mul64.c
new file mode 100644
index 0000000..a0a17f7
--- /dev/null
+++ b/tests/test-mul64.c
@@ -0,0 +1,70 @@
+/*
+ * Test 64x64 -> 128 multiply subroutines
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+
+#include <glib.h>
+#include <stdint.h>
+#include "qemu/host-utils.h"
+#include "qemu/osdep.h"
+
+
+typedef struct {
+    uint64_t a, b;
+    uint64_t rh, rl;
+} Test;
+
+static const Test test_u_data[] = {
+    { 1, 1, 0, 1 },
+    { 10000, 10000, 0, 100000000 },
+    { 0xffffffffffffffffULL, 2, 1, 0xfffffffffffffffeULL },
+    { 0xffffffffffffffffULL, 0xffffffffffffffffULL,
+      0xfffffffffffffffeULL, 0x0000000000000001ULL },
+    { 0x1122334455667788ull, 0x8877665544332211ull,
+      0x092228fb777ae38full, 0x0a3e963337c60008ull },
+};
+
+static const Test test_s_data[] = {
+    { 1, 1, 0, 1 },
+    { 1, -1, -1, -1 },
+    { -10, -10, 0, 100 },
+    { 10000, 10000, 0, 100000000 },
+    { -1, 2, -1, -2 },
+    { 0x1122334455667788ULL, 0x1122334455667788ULL,
+      0x01258f60bbc2975cULL, 0x1eace4a3c82fb840ULL },
+};
+
+static void test_u(void)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(test_u_data); ++i) {
+        uint64_t rl, rh;
+        mulu64(&rl, &rh, test_u_data[i].a, test_u_data[i].b);
+        g_assert_cmpuint(rl, ==, test_u_data[i].rl);
+        g_assert_cmpuint(rh, ==, test_u_data[i].rh);
+    }
+}
+
+static void test_s(void)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(test_s_data); ++i) {
+        uint64_t rl, rh;
+        muls64(&rl, &rh, test_s_data[i].a, test_s_data[i].b);
+        g_assert_cmpuint(rl, ==, test_s_data[i].rl);
+        g_assert_cmpint(rh, ==, test_s_data[i].rh);
+    }
+}
+
+int main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+    g_test_add_func("/host-utils/mulu64", test_u);
+    g_test_add_func("/host-utils/muls64", test_s);
+    return g_test_run();
+}