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 19 COMPILER_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