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