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 19 COMPILER_RT_ABI si_int __negvsi2(si_int a) { 20 const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT) - 1); 21 if (a == MIN) 22 compilerrt_abort(); 23 return -a; 24 } 25