1*3cab2bb3Spatrick //===-- absvdi2.c - Implement __absvdi2 -----------------------------------===// 2*3cab2bb3Spatrick // 3*3cab2bb3Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*3cab2bb3Spatrick // See https://llvm.org/LICENSE.txt for license information. 5*3cab2bb3Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*3cab2bb3Spatrick // 7*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 8*3cab2bb3Spatrick // 9*3cab2bb3Spatrick // This file implements __absvdi2 for the compiler_rt library. 10*3cab2bb3Spatrick // 11*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 12*3cab2bb3Spatrick 13*3cab2bb3Spatrick #include "int_lib.h" 14*3cab2bb3Spatrick 15*3cab2bb3Spatrick // Returns: absolute value 16*3cab2bb3Spatrick 17*3cab2bb3Spatrick // Effects: aborts if abs(x) < 0 18*3cab2bb3Spatrick __absvdi2(di_int a)19*3cab2bb3SpatrickCOMPILER_RT_ABI di_int __absvdi2(di_int a) { 20*3cab2bb3Spatrick const int N = (int)(sizeof(di_int) * CHAR_BIT); 21*3cab2bb3Spatrick if (a == ((di_int)1 << (N - 1))) 22*3cab2bb3Spatrick compilerrt_abort(); 23*3cab2bb3Spatrick const di_int t = a >> (N - 1); 24*3cab2bb3Spatrick return (a ^ t) - t; 25*3cab2bb3Spatrick } 26