1 //===-- absvsi2.c - Implement __absvsi2 -----------------------------------===//
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 __absvsi2 for the compiler_rt library.
11 //===----------------------------------------------------------------------===//
15 // Returns: absolute value
17 // Effects: aborts if abs(x) < 0
19 COMPILER_RT_ABI si_int __absvsi2(si_int a) {
20 const int N = (int)(sizeof(si_int) * CHAR_BIT);
21 if (a == ((si_int)1 << (N - 1)))
23 const si_int t = a >> (N - 1);