1 files changed, 62 insertions, 0 deletions
diff --git a/test/Unit/parityti2_test.c b/test/Unit/parityti2_test.c
new file mode 100644
index 000000000..7f0a946cd
--- /dev/null
+++ b/test/Unit/parityti2_test.c
@@ -0,0 +1,62 @@
+//===-- parityti2_test.c - Test __parityti2 -------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __parityti2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if __x86_64
+
+#include "int_lib.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+// Returns: 1 if number of bits is odd else returns 0
+
+si_int __parityti2(ti_int a);
+
+int naive_parity(ti_int a)
+{
+    int r = 0;
+    for (; a; a = a & (a - 1))
+        r = ~r;
+    return r & 1;
+}
+
+int test__parityti2(ti_int a)
+{
+    si_int x = __parityti2(a);
+    si_int expected = naive_parity(a);
+    if (x != expected)
+    {
+        twords at;
+        at.all = a;
+        printf("error in __parityti2(0x%.16llX%.16llX) = %d, expected %d\n",
+               at.high, at.low, x, expected);
+    }
+    return x != expected;
+}
+
+char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
+char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
+
+#endif
+
+int main()
+{
+#if __x86_64
+    int i;
+    for (i = 0; i < 10000; ++i)
+        if (test__parityti2(((ti_int)rand() << 96) + ((ti_int)rand() << 64) +
+                            ((ti_int)rand() << 32) + rand()))
+            return 1;
+
+#endif
+   return 0;
+}