1353358Sdim//===-- negvsi2.c - Implement __negvsi2 -----------------------------------===//
2353358Sdim//
3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4353358Sdim// See https://llvm.org/LICENSE.txt for license information.
5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6353358Sdim//
7353358Sdim//===----------------------------------------------------------------------===//
8353358Sdim//
9353358Sdim// This file implements __negvsi2 for the compiler_rt library.
10353358Sdim//
11353358Sdim//===----------------------------------------------------------------------===//
12276789Sdim
13276789Sdim#include "int_lib.h"
14276789Sdim
15353358Sdim// Returns: -a
16276789Sdim
17353358Sdim// Effects: aborts if -a overflows
18276789Sdim
19353358SdimCOMPILER_RT_ABI si_int __negvsi2(si_int a) {
20353358Sdim  const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT) - 1);
21353358Sdim  if (a == MIN)
22353358Sdim    compilerrt_abort();
23353358Sdim  return -a;
24276789Sdim}
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