tests: Add unit tests for mulu64 and muls64

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

2 files changed, 75 insertions, 1 deletions

diff --git a/tests/Makefile b/tests/Makefile
index a2d62b8596..567e36e777 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -54,6 +54,8 @@ check-unit-y += tests/test-xbzrle$(EXESUF)
 gcov-files-test-xbzrle-y = xbzrle.c
 check-unit-y += tests/test-cutils$(EXESUF)
 gcov-files-test-cutils-y += util/cutils.c
+check-unit-y += tests/test-mul64$(EXESUF)
+gcov-files-test-mul64-y = util/host-utils.c
 
 check-block-$(CONFIG_POSIX) += tests/qemu-iotests-quick.sh
 
@@ -82,7 +84,7 @@ test-obj-y = tests/check-qint.o tests/check-qstring.o tests/check-qdict.o \
 	tests/test-string-input-visitor.o tests/test-qmp-output-visitor.o \
 	tests/test-qmp-input-visitor.o tests/test-qmp-input-strict.o \
 	tests/test-qmp-commands.o tests/test-visitor-serialization.o \
-	tests/test-x86-cpuid.o
+	tests/test-x86-cpuid.o tests/test-mul64.o
 
 test-qapi-obj-y = tests/test-qapi-visit.o tests/test-qapi-types.o
 
@@ -124,6 +126,8 @@ tests/test-qmp-input-strict$(EXESUF): tests/test-qmp-input-strict.o $(test-qapi-
 tests/test-qmp-commands$(EXESUF): tests/test-qmp-commands.o tests/test-qmp-marshal.o $(test-qapi-obj-y) qapi-types.o qapi-visit.o libqemuutil.a libqemustub.a
 tests/test-visitor-serialization$(EXESUF): tests/test-visitor-serialization.o $(test-qapi-obj-y) libqemuutil.a libqemustub.a
 
+tests/test-mul64$(EXESUF): tests/test-mul64.o libqemuutil.a
+
 tests/rtc-test$(EXESUF): tests/rtc-test.o
 tests/m48t59-test$(EXESUF): tests/m48t59-test.o
 tests/fdc-test$(EXESUF): tests/fdc-test.o
diff --git a/tests/test-mul64.c b/tests/test-mul64.c
new file mode 100644
index 0000000000..a0a17f7775
--- /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();
+}