d6a0aa314c
The definisions of __ffs(), __fls(), and ffs() for tile are almost same as asm-generic/bitops-*.h. The only difference is that it is defined as __always_inline or inline. So this switches to use those headers. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [moved #includes to end]
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/*
|
|
* Copyright 1992, Linus Torvalds.
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef _ASM_TILE_BITOPS_H
|
|
#define _ASM_TILE_BITOPS_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#ifndef _LINUX_BITOPS_H
|
|
#error only <linux/bitops.h> can be included directly
|
|
#endif
|
|
|
|
#ifdef __tilegx__
|
|
#include <asm/bitops_64.h>
|
|
#else
|
|
#include <asm/bitops_32.h>
|
|
#endif
|
|
|
|
/**
|
|
* ffz - find first zero bit in word
|
|
* @word: The word to search
|
|
*
|
|
* Undefined if no zero exists, so code should check against ~0UL first.
|
|
*/
|
|
static inline unsigned long ffz(unsigned long word)
|
|
{
|
|
return __builtin_ctzl(~word);
|
|
}
|
|
|
|
static inline int fls64(__u64 w)
|
|
{
|
|
return (sizeof(__u64) * 8) - __builtin_clzll(w);
|
|
}
|
|
|
|
/**
|
|
* fls - find last set bit in word
|
|
* @x: the word to search
|
|
*
|
|
* This is defined in a similar way as the libc and compiler builtin
|
|
* ffs, but returns the position of the most significant set bit.
|
|
*
|
|
* fls(value) returns 0 if value is 0 or the position of the last
|
|
* set bit if value is nonzero. The last (most significant) bit is
|
|
* at position 32.
|
|
*/
|
|
static inline int fls(int x)
|
|
{
|
|
return fls64((unsigned int) x);
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight32(unsigned int w)
|
|
{
|
|
return __builtin_popcount(w);
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight16(unsigned int w)
|
|
{
|
|
return __builtin_popcount(w & 0xffff);
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight8(unsigned int w)
|
|
{
|
|
return __builtin_popcount(w & 0xff);
|
|
}
|
|
|
|
static inline unsigned long __arch_hweight64(__u64 w)
|
|
{
|
|
return __builtin_popcountll(w);
|
|
}
|
|
|
|
#include <asm-generic/bitops/builtin-__ffs.h>
|
|
#include <asm-generic/bitops/builtin-__fls.h>
|
|
#include <asm-generic/bitops/builtin-ffs.h>
|
|
#include <asm-generic/bitops/const_hweight.h>
|
|
#include <asm-generic/bitops/lock.h>
|
|
#include <asm-generic/bitops/find.h>
|
|
#include <asm-generic/bitops/sched.h>
|
|
#include <asm-generic/bitops/non-atomic.h>
|
|
#include <asm-generic/bitops/le.h>
|
|
|
|
#endif /* _ASM_TILE_BITOPS_H */
|