forked from OSchip/llvm-project
29 lines
806 B
C
29 lines
806 B
C
/* ===-- ffssi2.c - Implement __ffssi2 -------------------------------------===
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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 __ffssi2 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: the index of the least significant 1-bit in a, or
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* the value zero if a is zero. The least significant bit is index one.
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*/
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COMPILER_RT_ABI si_int
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__ffssi2(si_int a)
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{
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if (a == 0)
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{
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return 0;
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}
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return __builtin_ctz(a) + 1;
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}
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