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 
__negvti2(ti_int a)21 COMPILER_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