forked from OSchip/llvm-project
24 lines
787 B
C
24 lines
787 B
C
//===-- ffssi2.c - Implement __ffssi2 -------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements __ffssi2 for the compiler_rt library.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "int_lib.h"
|
|
|
|
// Returns: the index of the least significant 1-bit in a, or
|
|
// the value zero if a is zero. The least significant bit is index one.
|
|
|
|
COMPILER_RT_ABI si_int __ffssi2(si_int a) {
|
|
if (a == 0) {
|
|
return 0;
|
|
}
|
|
return __builtin_ctz(a) + 1;
|
|
}
|