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1//===-- absvsi2.c - Implement __absvsi2 -----------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements __absvsi2 for the compiler_rt library.10//11//===----------------------------------------------------------------------===//12 13#include "int_lib.h"14 15// Returns: absolute value16 17// Effects: aborts if abs(x) < 018 19COMPILER_RT_ABI si_int __absvsi2(si_int a) {20 const int N = (int)(sizeof(si_int) * CHAR_BIT);21 if (a == ((si_int)((su_int)1 << (N - 1))))22 compilerrt_abort();23 const si_int t = a >> (N - 1);24 return (a ^ t) - t;25}26