forked from OSchip/llvm-project
30 lines
782 B
C
30 lines
782 B
C
//===-- absvsi2.c - Implement __absvsi2 -----------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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#include "int_lib.h"
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#include <stdlib.h>
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// Returns: absolute value
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// Effects: aborts if abs(x) < 0
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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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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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