1*0b57cec5SDimitry Andric //===-- negvsi2.c - Implement __negvsi2 -----------------------------------===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file implements __negvsi2 for the compiler_rt library. 10*0b57cec5SDimitry Andric // 11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 12*0b57cec5SDimitry Andric 13*0b57cec5SDimitry Andric #include "int_lib.h" 14*0b57cec5SDimitry Andric 15*0b57cec5SDimitry Andric // Returns: -a 16*0b57cec5SDimitry Andric 17*0b57cec5SDimitry Andric // Effects: aborts if -a overflows 18*0b57cec5SDimitry Andric 19*0b57cec5SDimitry Andric COMPILER_RT_ABI si_int __negvsi2(si_int a) { 20*0b57cec5SDimitry Andric const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT) - 1); 21*0b57cec5SDimitry Andric if (a == MIN) 22*0b57cec5SDimitry Andric compilerrt_abort(); 23*0b57cec5SDimitry Andric return -a; 24*0b57cec5SDimitry Andric } 25