1//===-- negvsi2.c - Implement __negvsi2 -----------------------------------===// 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 __negvsi2 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 si_int __negvsi2(si_int a) { 20 const si_int MIN = 21 (si_int)((su_int)1 << ((int)(sizeof(si_int) * CHAR_BIT) - 1)); 22 if (a == MIN) 23 compilerrt_abort(); 24 return -a; 25} 26