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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 dual licensed under the MIT and the University of Illinois Open |
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* Source Licenses. 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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*/ |
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#include "int_lib.h" |
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#ifdef CRT_HAS_128BIT |
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/* Returns: absolute value */ |
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/* Effects: aborts if abs(x) < 0 */ |
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COMPILER_RT_ABI 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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compilerrt_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 /* CRT_HAS_128BIT */ |
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