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16 lines
436 B
16 lines
436 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_ |
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#define _ASM_GENERIC_BITOPS_BUILTIN___FLS_H_ |
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/** |
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* __fls - find last (most-significant) set bit in a long word |
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* @word: the word to search |
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* |
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* Undefined if no set bit exists, so code should check against 0 first. |
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*/ |
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static __always_inline unsigned long __fls(unsigned long word) |
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{ |
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return (sizeof(word) * 8) - 1 - __builtin_clzl(word); |
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} |
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#endif
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