1 files changed, 37 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/ucmpti2.c b/compiler-rt/lib/builtins/ucmpti2.c
new file mode 100644
index 000000000000..4eb6655b05af
--- /dev/null
+++ b/compiler-rt/lib/builtins/ucmpti2.c
@@ -0,0 +1,37 @@
+//===-- ucmpti2.c - Implement __ucmpti2 -----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __ucmpti2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+#ifdef CRT_HAS_128BIT
+
+// Returns:  if (a <  b) returns 0
+//           if (a == b) returns 1
+//           if (a >  b) returns 2
+
+COMPILER_RT_ABI si_int __ucmpti2(tu_int a, tu_int b) {
+  utwords x;
+  x.all = a;
+  utwords y;
+  y.all = b;
+  if (x.s.high < y.s.high)
+    return 0;
+  if (x.s.high > y.s.high)
+    return 2;
+  if (x.s.low < y.s.low)
+    return 0;
+  if (x.s.low > y.s.low)
+    return 2;
+  return 1;
+}
+
+#endif // CRT_HAS_128BIT