10b57cec5SDimitry Andric //===-- negvti2.c - Implement __negvti2 -----------------------------------===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file implements __negvti2 for the compiler_rt library. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 120b57cec5SDimitry Andric 130b57cec5SDimitry Andric #include "int_lib.h" 140b57cec5SDimitry Andric 150b57cec5SDimitry Andric #ifdef CRT_HAS_128BIT 160b57cec5SDimitry Andric 170b57cec5SDimitry Andric // Returns: -a 180b57cec5SDimitry Andric 190b57cec5SDimitry Andric // Effects: aborts if -a overflows 200b57cec5SDimitry Andric __negvti2(ti_int a)210b57cec5SDimitry AndricCOMPILER_RT_ABI ti_int __negvti2(ti_int a) { 22*5f757f3fSDimitry Andric const ti_int MIN = (tu_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT) - 1); 230b57cec5SDimitry Andric if (a == MIN) 240b57cec5SDimitry Andric compilerrt_abort(); 250b57cec5SDimitry Andric return -a; 260b57cec5SDimitry Andric } 270b57cec5SDimitry Andric 280b57cec5SDimitry Andric #endif // CRT_HAS_128BIT 29