1276789Sdim/* ===-- absvti2.c - Implement __absvdi2 -----------------------------------===
2276789Sdim *
3276789Sdim *                     The LLVM Compiler Infrastructure
4276789Sdim *
5276789Sdim * This file is dual licensed under the MIT and the University of Illinois Open
6276789Sdim * Source Licenses. See LICENSE.TXT for details.
7276789Sdim *
8276789Sdim * ===----------------------------------------------------------------------===
9276789Sdim *
10276789Sdim * This file implements __absvti2 for the compiler_rt library.
11276789Sdim *
12276789Sdim * ===----------------------------------------------------------------------===
13276789Sdim */
14276789Sdim
15276789Sdim#include "int_lib.h"
16276789Sdim
17276789Sdim#ifdef CRT_HAS_128BIT
18276789Sdim
19276789Sdim/* Returns: absolute value */
20276789Sdim
21276789Sdim/* Effects: aborts if abs(x) < 0 */
22276789Sdim
23276789SdimCOMPILER_RT_ABI ti_int
24276789Sdim__absvti2(ti_int a)
25276789Sdim{
26276789Sdim    const int N = (int)(sizeof(ti_int) * CHAR_BIT);
27276789Sdim    if (a == ((ti_int)1 << (N-1)))
28276789Sdim        compilerrt_abort();
29276789Sdim    const ti_int s = a >> (N - 1);
30276789Sdim    return (a ^ s) - s;
31276789Sdim}
32276789Sdim
33276789Sdim#endif /* CRT_HAS_128BIT */
34276789Sdim
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