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
19COMPILER_RT_ABI di_int __negvdi2(di_int a) {
20 const di_int MIN =
21 (di_int)((du_int)1 << ((int)(sizeof(di_int) * CHAR_BIT) - 1));
22 if (a == MIN)
23 compilerrt_abort();
24 return -a;
25}
26

source code of compiler-rt/lib/builtins/negvdi2.c