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-rw-r--r--tests/test-bitops.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/tests/test-bitops.c b/tests/test-bitops.c
new file mode 100644
index 0000000000..4e713e4e00
--- /dev/null
+++ b/tests/test-bitops.c
@@ -0,0 +1,75 @@
+/*
+ * Test bitops routines
+ *
+ * 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/bitops.h"
+
+typedef struct {
+ uint32_t value;
+ int start;
+ int length;
+ int32_t result;
+} S32Test;
+
+typedef struct {
+ uint64_t value;
+ int start;
+ int length;
+ int64_t result;
+} S64Test;
+
+static const S32Test test_s32_data[] = {
+ { 0x38463983, 4, 4, -8 },
+ { 0x38463983, 12, 8, 0x63 },
+ { 0x38463983, 0, 32, 0x38463983 },
+};
+
+static const S64Test test_s64_data[] = {
+ { 0x8459826734967223, 60, 4, -8 },
+ { 0x8459826734967223, 0, 64, 0x8459826734967223 },
+};
+
+static void test_sextract32(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(test_s32_data); i++) {
+ const S32Test *test = &test_s32_data[i];
+ int32_t r = sextract32(test->value, test->start, test->length);
+
+ g_assert_cmpint(r, ==, test->result);
+ }
+}
+
+static void test_sextract64(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(test_s32_data); i++) {
+ const S32Test *test = &test_s32_data[i];
+ int64_t r = sextract64(test->value, test->start, test->length);
+
+ g_assert_cmpint(r, ==, test->result);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(test_s64_data); i++) {
+ const S64Test *test = &test_s64_data[i];
+ int64_t r = sextract64(test->value, test->start, test->length);
+
+ g_assert_cmpint(r, ==, test->result);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ g_test_init(&argc, &argv, NULL);
+ g_test_add_func("/bitops/sextract32", test_sextract32);
+ g_test_add_func("/bitops/sextract64", test_sextract64);
+ return g_test_run();
+}