44 lines
899 B
C
44 lines
899 B
C
|
// 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 __ctzsi2(int val)
|
||
|
|
{
|
||
|
|
return __ffs(val);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(__ctzsi2);
|
||
|
|
|
||
|
|
int __weak __clzsi2(int val);
|
||
|
|
int __weak __clzsi2(int val)
|
||
|
|
{
|
||
|
|
return 32 - fls(val);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(__clzsi2);
|
||
|
|
|
||
|
|
int __weak __clzdi2(u64 val);
|
||
|
|
int __weak __clzdi2(u64 val)
|
||
|
|
{
|
||
|
|
return 64 - fls64(val);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(__clzdi2);
|
||
|
|
|
||
|
|
int __weak __ctzdi2(u64 val);
|
||
|
|
int __weak __ctzdi2(u64 val)
|
||
|
|
{
|
||
|
|
return __ffs64(val);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(__ctzdi2);
|