1 files changed, 139 insertions, 0 deletions
diff --git a/tests/unit/test-shift128.c b/tests/unit/test-shift128.c
new file mode 100644
index 0000000000..f3ff736e5c
--- /dev/null
+++ b/tests/unit/test-shift128.c
@@ -0,0 +1,139 @@
+/*
+ * Test unsigned left and right shift
+ *
+ * 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 "qemu/osdep.h"
+#include "qemu/host-utils.h"
+
+typedef struct {
+    uint64_t low;
+    uint64_t high;
+    uint64_t rlow;
+    uint64_t rhigh;
+    int32_t shift;
+    bool overflow;
+} test_data;
+
+static const test_data test_ltable[] = {
+    { 0x4C7ULL, 0x0ULL, 0x00000000000004C7ULL,
+      0x0000000000000000ULL,   0, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000002ULL,
+      0x0000000000000000ULL,   1, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000004ULL,
+      0x0000000000000000ULL,   2, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000010ULL,
+      0x0000000000000000ULL,   4, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000100ULL,
+      0x0000000000000000ULL,   8, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000010000ULL,
+      0x0000000000000000ULL,  16, false },
+    { 0x001ULL, 0x0ULL, 0x0000000080000000ULL,
+      0x0000000000000000ULL,  31, false },
+    { 0x001ULL, 0x0ULL, 0x0000200000000000ULL,
+      0x0000000000000000ULL,  45, false },
+    { 0x001ULL, 0x0ULL, 0x1000000000000000ULL,
+      0x0000000000000000ULL,  60, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x0000000000000001ULL,  64, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x0000000000010000ULL,  80, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x8000000000000000ULL, 127, false },
+    { 0x000ULL, 0x1ULL, 0x0000000000000000ULL,
+      0x0000000000000000ULL,  64,  true },
+    { 0x008ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x0000000000000008ULL,  64, false },
+    { 0x008ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x8000000000000000ULL, 124, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x4000000000000000ULL, 126, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x8000000000000000ULL, 127, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000001ULL,
+      0x0000000000000000ULL, 128,  false },
+    { 0x000ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x0000000000000000ULL, 200, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x0000000000000100ULL, 200,  false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x8000000000000000ULL,  -1, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x8000000000000000ULL, INT32_MAX, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x4000000000000000ULL,  -2, false },
+    { 0x001ULL, 0x0ULL, 0x0000000000000000ULL,
+      0x4000000000000000ULL, INT32_MAX - 1, false },
+    { 0x8888888888888888ULL, 0x9999999999999999ULL,
+      0x8000000000000000ULL, 0x9888888888888888ULL, 60, true },
+    { 0x8888888888888888ULL, 0x9999999999999999ULL,
+      0x0000000000000000ULL, 0x8888888888888888ULL, 64, true },
+};
+
+static const test_data test_rtable[] = {
+    { 0x00000000000004C7ULL, 0x0ULL, 0x00000000000004C7ULL, 0x0ULL,  0, false },
+    { 0x0800000000000000ULL, 0x0ULL, 0x0400000000000000ULL, 0x0ULL,  1, false },
+    { 0x0800000000000000ULL, 0x0ULL, 0x0200000000000000ULL, 0x0ULL,  2, false },
+    { 0x0800000000000000ULL, 0x0ULL, 0x0008000000000000ULL, 0x0ULL,  8, false },
+    { 0x0800000000000000ULL, 0x0ULL, 0x0000080000000000ULL, 0x0ULL, 16, false },
+    { 0x0800000000000000ULL, 0x0ULL, 0x0000000008000000ULL, 0x0ULL, 32, false },
+    { 0x8000000000000000ULL, 0x0ULL, 0x0000000000000001ULL, 0x0ULL, 63, false },
+    { 0x8000000000000000ULL, 0x0ULL, 0x0000000000000000ULL, 0x0ULL, 64, false },
+    { 0x0000000000000000ULL, 0x8000000000000000ULL,
+      0x0000000000000000ULL, 0x8000000000000000ULL, 128, false },
+    { 0x0000000000000000ULL, 0x8000000000000000ULL,
+      0x0080000000000000ULL, 0x0000000000000000ULL, 200, false },
+    { 0x0000000000000000ULL, 0x0000000000000000ULL,
+      0x0000000000000000ULL, 0x0000000000000000ULL, 200, false },
+    { 0x0000000000000000ULL, 0x8000000000000000ULL,
+      0x0000000000000000ULL, 0x0000000000000080ULL, -200, false },
+    { 0x8000000000000000ULL, 0x8000000000000000ULL,
+      0x0000000080000000ULL, 0x0000000080000000ULL, 32, false },
+    { 0x0800000000000000ULL, 0x0800000000000000ULL,
+      0x0800000000000000ULL, 0x0000000000000000ULL, 64, false },
+    { 0x0800000000000000ULL, 0x0800000000000000ULL,
+      0x0008000000000000ULL, 0x0000000000000000ULL, 72, false },
+    { 0x8000000000000000ULL, 0x8000000000000000ULL,
+      0x0000000000000001ULL, 0x0000000000000000ULL, 127, false },
+    { 0x0000000000000000ULL, 0x8000000000000000ULL,
+      0x0000000000000001ULL, 0x0000000000000000ULL, -1, false },
+    { 0x0000000000000000ULL, 0x8000000000000000ULL,
+      0x0000000000000002ULL, 0x0000000000000000ULL, -2, false },
+};
+
+static void test_lshift(void)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(test_ltable); ++i) {
+        bool overflow = false;
+        test_data tmp = test_ltable[i];
+        ulshift(&tmp.low, &tmp.high, tmp.shift, &overflow);
+        g_assert_cmpuint(tmp.low, ==, tmp.rlow);
+        g_assert_cmpuint(tmp.high, ==, tmp.rhigh);
+        g_assert_cmpuint(tmp.overflow, ==, overflow);
+    }
+}
+
+static void test_rshift(void)
+{
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(test_rtable); ++i) {
+        test_data tmp = test_rtable[i];
+        urshift(&tmp.low, &tmp.high, tmp.shift);
+        g_assert_cmpuint(tmp.low, ==, tmp.rlow);
+        g_assert_cmpuint(tmp.high, ==, tmp.rhigh);
+    }
+}
+
+int main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+    g_test_add_func("/host-utils/test_lshift", test_lshift);
+    g_test_add_func("/host-utils/test_rshift", test_rshift);
+    return g_test_run();
+}