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Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/unicore32/include/asm/bitops.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*/
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#ifndef __UNICORE_BITOPS_H__
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#define __UNICORE_BITOPS_H__
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#define _ASM_GENERIC_BITOPS_FLS_H_
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#define _ASM_GENERIC_BITOPS___FLS_H_
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#define _ASM_GENERIC_BITOPS_FFS_H_
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#define _ASM_GENERIC_BITOPS___FFS_H_
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/*
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* On UNICORE, those functions can be implemented around
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* the cntlz instruction for much better code efficiency.
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*/
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static inline int fls(unsigned int x)
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{
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int ret;
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asm("cntlz\t%0, %1" : "=r" (ret) : "r" (x) : "cc");
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ret = 32 - ret;
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return ret;
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}
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#define __fls(x) (fls(x) - 1)
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#define ffs(x) ({ unsigned long __t = (x); fls(__t & -__t); })
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#define __ffs(x) (ffs(x) - 1)
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#include <asm-generic/bitops.h>
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/* following definitions: to avoid using codes in lib/find_*.c */
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#define find_next_bit find_next_bit
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#define find_next_zero_bit find_next_zero_bit
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#define find_first_bit find_first_bit
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#define find_first_zero_bit find_first_zero_bit
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#include <asm-generic/bitops/find.h>
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#endif /* __UNICORE_BITOPS_H__ */
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