1//===-- absvti2.c - Implement __absvdi2 -----------------------------------===// 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 __absvti2 for the compiler_rt library. 10// 11//===----------------------------------------------------------------------===// 12 13#include "int_lib.h" 14 15#ifdef CRT_HAS_128BIT 16 17// Returns: absolute value 18 19// Effects: aborts if abs(x) < 0 20 21COMPILER_RT_ABI ti_int __absvti2(ti_int a) { 22 const int N = (int)(sizeof(ti_int) * CHAR_BIT); 23 if (a == ((ti_int)1 << (N - 1))) 24 compilerrt_abort(); 25 const ti_int s = a >> (N - 1); 26 return (a ^ s) - s; 27} 28 29#endif // CRT_HAS_128BIT 30