1 //===-- negvdi2.c - Implement __negvdi2 -----------------------------------===//
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 __negvdi2 for the compiler_rt library.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "int_lib.h"
14 
15 // Returns: -a
16 
17 // Effects: aborts if -a overflows
18 
__negvdi2(di_int a)19 COMPILER_RT_ABI di_int __negvdi2(di_int a) {
20   const di_int MIN = (di_int)1 << ((int)(sizeof(di_int) * CHAR_BIT) - 1);
21   if (a == MIN)
22     compilerrt_abort();
23   return -a;
24 }
25