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1//===-- ffssi2.c - Implement __ffssi2 -------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements __ffssi2 for the compiler_rt library.10//11//===----------------------------------------------------------------------===//12 13#include "int_lib.h"14 15// Returns: the index of the least significant 1-bit in a, or16// the value zero if a is zero. The least significant bit is index one.17 18COMPILER_RT_ABI int __ffssi2(si_int a) {19 if (a == 0) {20 return 0;21 }22 return ctzsi(a) + 1;23}24