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30 lines
864 B
30 lines
864 B
7 months ago
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//===-- absvti2.c - Implement __absvdi2 -----------------------------------===//
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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 __absvti2 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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#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 __absvti2(ti_int a) {
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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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