| //===-- absvti2.c - Implement __absvdi2 -----------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements __absvti2 for the compiler_rt library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "int_lib.h" |
| |
| #ifdef CRT_HAS_128BIT |
| |
| // Returns: absolute value |
| |
| // Effects: aborts if abs(x) < 0 |
| |
| COMPILER_RT_ABI ti_int __absvti2(ti_int a) { |
| const int N = (int)(sizeof(ti_int) * CHAR_BIT); |
| if (a == (ti_int)((tu_int)1 << (N - 1))) |
| compilerrt_abort(); |
| const ti_int s = a >> (N - 1); |
| return (a ^ s) - s; |
| } |
| |
| #endif // CRT_HAS_128BIT |
