34 lines
812 B
C
34 lines
812 B
C
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//===-- absvti2.c - Implement __absvdi2 -----------------------------------===//
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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 __absvti2 for the compiler_rt library.
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//
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//===----------------------------------------------------------------------===//
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#if __x86_64
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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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ti_int
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__absvti2(ti_int a)
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{
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const int N = (int)(sizeof(ti_int) * CHAR_BIT);
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if (a == ((ti_int)1 << (N-1)))
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abort();
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const ti_int s = a >> (N - 1);
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return (a ^ s) - s;
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}
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#endif
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