1 files changed, 24 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/negvsi2.c b/compiler-rt/lib/builtins/negvsi2.c
new file mode 100644
index 000000000000..cccdee6dc5e5
--- /dev/null
+++ b/compiler-rt/lib/builtins/negvsi2.c
@@ -0,0 +1,24 @@
+//===-- negvsi2.c - Implement __negvsi2 -----------------------------------===//
+//
+// 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 __negvsi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: -a
+
+// Effects: aborts if -a overflows
+
+COMPILER_RT_ABI si_int __negvsi2(si_int a) {
+  const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT) - 1);
+  if (a == MIN)
+    compilerrt_abort();
+  return -a;
+}