1 //===-- negvsi2.c - Implement __negvsi2 -----------------------------------===//
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
7 //===----------------------------------------------------------------------===//
9 // This file implements __negvsi2 for the compiler_rt library.
11 //===----------------------------------------------------------------------===//
17 // Effects: aborts if -a overflows
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);