1 files changed, 82 insertions, 0 deletions
diff --git a/test/Unit/ctzti2_test.c b/test/Unit/ctzti2_test.c
new file mode 100644
index 000000000..cbad510e4
--- /dev/null
+++ b/test/Unit/ctzti2_test.c
@@ -0,0 +1,82 @@
+//===-- ctzti2_test.c - Test __ctzti2 -------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __ctzti2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#if __x86_64
+
+#include "int_lib.h"
+#include <stdio.h>
+
+// Returns: the number of trailing 0-bits
+
+// Precondition: a != 0
+
+si_int __ctzti2(ti_int a);
+
+int test__ctzti2(ti_int a, si_int expected)
+{
+    si_int x = __ctzti2(a);
+    if (x != expected)
+    {
+        twords at;
+        at.all = a;
+        printf("error in __ctzti2(0x%llX%.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};
+
+#endif
+
+int main()
+{
+#if __x86_64
+    if (test__ctzti2(0x00000001, 0))
+        return 1;
+    if (test__ctzti2(0x00000002, 1))
+        return 1;
+    if (test__ctzti2(0x00000003, 0))
+        return 1;
+    if (test__ctzti2(0x00000004, 2))
+        return 1;
+    if (test__ctzti2(0x00000005, 0))
+        return 1;
+    if (test__ctzti2(0x0000000A, 1))
+        return 1;
+    if (test__ctzti2(0x10000000, 28))
+        return 1;
+    if (test__ctzti2(0x20000000, 29))
+        return 1;
+    if (test__ctzti2(0x60000000, 29))
+        return 1;
+    if (test__ctzti2(0x80000000uLL, 31))
+        return 1;
+    if (test__ctzti2(0x0000050000000000uLL, 40))
+        return 1;
+    if (test__ctzti2(0x0200080000000000uLL, 43))
+        return 1;
+    if (test__ctzti2(0x7200000000000000uLL, 57))
+        return 1;
+    if (test__ctzti2(0x8000000000000000uLL, 63))
+        return 1;
+    if (test__ctzti2(make_ti(0x00000000A0000000LL, 0x0000000000000000LL), 93))
+        return 1;
+    if (test__ctzti2(make_ti(0xF000000000000000LL, 0x0000000000000000LL), 124))
+        return 1;
+    if (test__ctzti2(make_ti(0x8000000000000000LL, 0x0000000000000000LL), 127))
+        return 1;
+#endif
+
+   return 0;
+}