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