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// SPDX-License-Identifier: GPL-2.0-only
/*
* lib/clz_ctz.c
*
* Copyright (C) 2013 Chanho Min <chanho.min@lge.com>
*
* The functions in this file aren't called directly, but are required by
* GCC builtins such as __builtin_ctz, and therefore they can't be removed
* despite appearing unreferenced in kernel source.
*
* __c[lt]z[sd]i2 can be overridden by linking arch-specific versions.
*/
#include <linux/export.h>
#include <linux/kernel.h>
int __weak __ctzsi2(int val);
int __weak __attribute_const__ __ctzsi2(int val)
{
return __ffs(val);
}
EXPORT_SYMBOL(__ctzsi2);
int __weak __clzsi2(int val);
int __weak __attribute_const__ __clzsi2(int val)
{
return 32 - fls(val);
}
EXPORT_SYMBOL(__clzsi2);
int __weak __clzdi2(u64 val);
int __weak __attribute_const__ __clzdi2(u64 val)
{
return 64 - fls64(val);
}
EXPORT_SYMBOL(__clzdi2);
int __weak __ctzdi2(u64 val);
int __weak __attribute_const__ __ctzdi2(u64 val)
{
return __ffs64(val);
}
EXPORT_SYMBOL(__ctzdi2);
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