1*0b57cec5SDimitry Andric //===-- absvti2.c - Implement __absvdi2 -----------------------------------===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file implements __absvti2 for the compiler_rt library. 10*0b57cec5SDimitry Andric // 11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 12*0b57cec5SDimitry Andric 13*0b57cec5SDimitry Andric #include "int_lib.h" 14*0b57cec5SDimitry Andric 15*0b57cec5SDimitry Andric #ifdef CRT_HAS_128BIT 16*0b57cec5SDimitry Andric 17*0b57cec5SDimitry Andric // Returns: absolute value 18*0b57cec5SDimitry Andric 19*0b57cec5SDimitry Andric // Effects: aborts if abs(x) < 0 20*0b57cec5SDimitry Andric 21*0b57cec5SDimitry Andric COMPILER_RT_ABI ti_int __absvti2(ti_int a) { 22*0b57cec5SDimitry Andric const int N = (int)(sizeof(ti_int) * CHAR_BIT); 23*0b57cec5SDimitry Andric if (a == ((ti_int)1 << (N - 1))) 24*0b57cec5SDimitry Andric compilerrt_abort(); 25*0b57cec5SDimitry Andric const ti_int s = a >> (N - 1); 26*0b57cec5SDimitry Andric return (a ^ s) - s; 27*0b57cec5SDimitry Andric } 28*0b57cec5SDimitry Andric 29*0b57cec5SDimitry Andric #endif // CRT_HAS_128BIT 30