1 files changed, 78 insertions, 0 deletions
diff --git a/test/Unit/subvti3_test.c b/test/Unit/subvti3_test.c
new file mode 100644
index 000000000000..11d81750f0c3
--- /dev/null
+++ b/test/Unit/subvti3_test.c
@@ -0,0 +1,78 @@
+//===-- subvti3_test.c - Test __subvti3 -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __subvti3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if __x86_64
+
+#include "int_lib.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+// Returns: a - b
+
+// Effects: aborts if a - b overflows
+
+ti_int __subvti3(ti_int a, ti_int b);
+
+int test__subvti3(ti_int a, ti_int b)
+{
+    ti_int x = __subvti3(a, b);
+    ti_int expected = a - b;
+    if (x != expected)
+    {
+        twords at;
+        at.all = a;
+        twords bt;
+        bt.all = b;
+        twords xt;
+        xt.all = x;
+        twords expectedt;
+        expectedt.all = expected;
+        printf("error in test__subvsi3(0x%.16llX%.16llX, 0x%.16llX%.16llX) = "
+               "0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
+               at.s.high, at.s.low, bt.s.high, bt.s.low, xt.s.high, xt.s.low,
+               expectedt.s.high, expectedt.s.low);
+    }
+    return x != expected;
+}
+
+#endif
+
+int main()
+{
+#if __x86_64
+//     test__subvti3(make_ti(0x8000000000000000LL, 0), 1);  // should abort
+//     test__subvti3(0, make_ti(0x8000000000000000LL, 0));  // should abort
+//     test__subvti3(1, make_ti(0x8000000000000000LL, 0));  // should abort
+//     test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), -1);  // should abort
+//     test__subvti3(-2, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL));  // should abort
+
+    if (test__subvti3(make_ti(0x8000000000000000LL, 0), -1))
+        return 1;
+    if (test__subvti3(make_ti(0x8000000000000000LL, 0), 0))
+        return 1;
+    if (test__subvti3(-1, make_ti(0x8000000000000000LL, 0)))
+        return 1;
+    if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 1))
+        return 1;
+    if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 0))
+        return 1;
+    if (test__subvti3(1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
+        return 1;
+    if (test__subvti3(0, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
+        return 1;
+    if (test__subvti3(-1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
+        return 1;
+
+#endif
+    return 0;
+}