61f2e7b0f4
minix bit operations are only used by minix filesystem and useless by other modules. Because byte order of inode and block bitmaps is different on each architecture like below: m68k: big-endian 16bit indexed bitmaps h8300, microblaze, s390, sparc, m68knommu: big-endian 32 or 64bit indexed bitmaps m32r, mips, sh, xtensa: big-endian 32 or 64bit indexed bitmaps for big-endian mode little-endian bitmaps for little-endian mode Others: little-endian bitmaps In order to move minix bit operations from asm/bitops.h to architecture independent code in minix filesystem, this provides two config options. CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k. CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which use native byte order bitmaps (h8300, microblaze, s390, sparc, m68knommu, m32r, mips, sh, xtensa). The architectures which always use little-endian bitmaps do not select these options. Finally, we can remove minix bit operations from asm/bitops.h for all architectures. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Greg Ungerer <gerg@uclinux.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Michal Simek <monstr@monstr.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Hirokazu Takata <takata@linux-m32r.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/*
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* Copyright 1992, Linus Torvalds.
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_BITOPS_H
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#define _ASM_TILE_BITOPS_H
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#include <linux/types.h>
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#ifndef _LINUX_BITOPS_H
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#error only <linux/bitops.h> can be included directly
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#endif
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#ifdef __tilegx__
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#include <asm/bitops_64.h>
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#else
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#include <asm/bitops_32.h>
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#endif
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/**
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* __ffs - find first set bit in 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 inline unsigned long __ffs(unsigned long word)
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{
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return __builtin_ctzl(word);
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}
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/**
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* ffz - find first zero bit in word
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* @word: The word to search
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*
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* Undefined if no zero exists, so code should check against ~0UL first.
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*/
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static inline unsigned long ffz(unsigned long word)
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{
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return __builtin_ctzl(~word);
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}
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/**
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* __fls - find last set bit in 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 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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/**
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* ffs - find first set bit in word
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* @x: the word to search
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*
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* This is defined the same way as the libc and compiler builtin ffs
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* routines, therefore differs in spirit from the other bitops.
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*
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* ffs(value) returns 0 if value is 0 or the position of the first
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* set bit if value is nonzero. The first (least significant) bit
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* is at position 1.
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*/
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static inline int ffs(int x)
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{
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return __builtin_ffs(x);
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}
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/**
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* fls - find last set bit in word
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* @x: the word to search
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*
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* This is defined in a similar way as the libc and compiler builtin
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* ffs, but returns the position of the most significant set bit.
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*
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* fls(value) returns 0 if value is 0 or the position of the last
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* set bit if value is nonzero. The last (most significant) bit is
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* at position 32.
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*/
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static inline int fls(int x)
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{
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return (sizeof(int) * 8) - __builtin_clz(x);
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}
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static inline int fls64(__u64 w)
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{
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return (sizeof(__u64) * 8) - __builtin_clzll(w);
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}
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static inline unsigned int __arch_hweight32(unsigned int w)
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{
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return __builtin_popcount(w);
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}
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static inline unsigned int __arch_hweight16(unsigned int w)
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{
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return __builtin_popcount(w & 0xffff);
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}
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static inline unsigned int __arch_hweight8(unsigned int w)
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{
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return __builtin_popcount(w & 0xff);
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}
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static inline unsigned long __arch_hweight64(__u64 w)
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{
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return __builtin_popcountll(w);
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}
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#include <asm-generic/bitops/const_hweight.h>
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#include <asm-generic/bitops/lock.h>
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#include <asm-generic/bitops/find.h>
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#include <asm-generic/bitops/sched.h>
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#include <asm-generic/bitops/le.h>
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#endif /* _ASM_TILE_BITOPS_H */
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