1//===-- negvti2.c - Implement __negvti2 -----------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements __negvti2 for the compiler_rt library.
10//
11//===----------------------------------------------------------------------===//
12
13#include "int_lib.h"
14
15#ifdef CRT_HAS_128BIT
16
17// Returns: -a
18
19// Effects: aborts if -a overflows
20
21COMPILER_RT_ABI ti_int __negvti2(ti_int a) {
22  const ti_int MIN = (ti_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT) - 1);
23  if (a == MIN)
24    compilerrt_abort();
25  return -a;
26}
27
28#endif // CRT_HAS_128BIT
29