1 files changed, 32 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/builtins/negvti2.c b/contrib/compiler-rt/lib/builtins/negvti2.c
new file mode 100644
index 000000000000..85f9f7d19d9d
--- /dev/null
+++ b/contrib/compiler-rt/lib/builtins/negvti2.c
@@ -0,0 +1,32 @@
+/*===-- negvti2.c - Implement __negvti2 -----------------------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ *===----------------------------------------------------------------------===
+ *
+ *This file implements __negvti2 for the compiler_rt library.
+ *
+ *===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+#ifdef CRT_HAS_128BIT
+
+/* Returns: -a */
+
+/* Effects: aborts if -a overflows */
+
+COMPILER_RT_ABI ti_int
+__negvti2(ti_int a)
+{
+    const ti_int MIN = (ti_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT)-1);
+    if (a == MIN)
+        compilerrt_abort();
+    return -a;
+}
+
+#endif /* CRT_HAS_128BIT */