forked from OSchip/llvm-project
29 lines
824 B
C
29 lines
824 B
C
/* ===-- absvsi2.c - Implement __absvsi2 -----------------------------------===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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* ===----------------------------------------------------------------------===
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*
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* This file implements __absvsi2 for the compiler_rt library.
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*
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* ===----------------------------------------------------------------------===
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*/
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#include "int_lib.h"
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/* Returns: absolute value */
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/* Effects: aborts if abs(x) < 0 */
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COMPILER_RT_ABI si_int
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__absvsi2(si_int a)
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{
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const int N = (int)(sizeof(si_int) * CHAR_BIT);
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if (a == (1 << (N-1)))
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compilerrt_abort();
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const si_int t = a >> (N - 1);
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return (a ^ t) - t;
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}
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