861b5ae7cd
Introduce little-endian bit operations to the big-endian architectures which do not have native little-endian bit operations and the little-endian architectures. (alpha, avr32, blackfin, cris, frv, h8300, ia64, m32r, mips, mn10300, parisc, sh, sparc, tile, x86, xtensa) These architectures can just include generic implementation (asm-generic/bitops/le.h). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <willy@debian.org> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
#ifndef __ASM_SH_BITOPS_H
|
|
#define __ASM_SH_BITOPS_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef _LINUX_BITOPS_H
|
|
#error only <linux/bitops.h> can be included directly
|
|
#endif
|
|
|
|
#include <asm/system.h>
|
|
/* For __swab32 */
|
|
#include <asm/byteorder.h>
|
|
|
|
#ifdef CONFIG_GUSA_RB
|
|
#include <asm/bitops-grb.h>
|
|
#elif defined(CONFIG_CPU_SH2A)
|
|
#include <asm-generic/bitops/atomic.h>
|
|
#include <asm/bitops-op32.h>
|
|
#elif defined(CONFIG_CPU_SH4A)
|
|
#include <asm/bitops-llsc.h>
|
|
#else
|
|
#include <asm-generic/bitops/atomic.h>
|
|
#include <asm-generic/bitops/non-atomic.h>
|
|
#endif
|
|
|
|
/*
|
|
* clear_bit() doesn't provide any barrier for the compiler.
|
|
*/
|
|
#define smp_mb__before_clear_bit() smp_mb()
|
|
#define smp_mb__after_clear_bit() smp_mb()
|
|
|
|
#ifdef CONFIG_SUPERH32
|
|
static inline unsigned long ffz(unsigned long word)
|
|
{
|
|
unsigned long result;
|
|
|
|
__asm__("1:\n\t"
|
|
"shlr %1\n\t"
|
|
"bt/s 1b\n\t"
|
|
" add #1, %0"
|
|
: "=r" (result), "=r" (word)
|
|
: "0" (~0L), "1" (word)
|
|
: "t");
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* __ffs - find first bit in word.
|
|
* @word: The word to search
|
|
*
|
|
* Undefined if no bit exists, so code should check against 0 first.
|
|
*/
|
|
static inline unsigned long __ffs(unsigned long word)
|
|
{
|
|
unsigned long result;
|
|
|
|
__asm__("1:\n\t"
|
|
"shlr %1\n\t"
|
|
"bf/s 1b\n\t"
|
|
" add #1, %0"
|
|
: "=r" (result), "=r" (word)
|
|
: "0" (~0L), "1" (word)
|
|
: "t");
|
|
return result;
|
|
}
|
|
#else
|
|
static inline unsigned long ffz(unsigned long word)
|
|
{
|
|
unsigned long result, __d2, __d3;
|
|
|
|
__asm__("gettr tr0, %2\n\t"
|
|
"pta $+32, tr0\n\t"
|
|
"andi %1, 1, %3\n\t"
|
|
"beq %3, r63, tr0\n\t"
|
|
"pta $+4, tr0\n"
|
|
"0:\n\t"
|
|
"shlri.l %1, 1, %1\n\t"
|
|
"addi %0, 1, %0\n\t"
|
|
"andi %1, 1, %3\n\t"
|
|
"beqi %3, 1, tr0\n"
|
|
"1:\n\t"
|
|
"ptabs %2, tr0\n\t"
|
|
: "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
|
|
: "0" (0L), "1" (word));
|
|
|
|
return result;
|
|
}
|
|
|
|
#include <asm-generic/bitops/__ffs.h>
|
|
#endif
|
|
|
|
#include <asm-generic/bitops/find.h>
|
|
#include <asm-generic/bitops/ffs.h>
|
|
#include <asm-generic/bitops/hweight.h>
|
|
#include <asm-generic/bitops/lock.h>
|
|
#include <asm-generic/bitops/sched.h>
|
|
#include <asm-generic/bitops/le.h>
|
|
#include <asm-generic/bitops/ext2-non-atomic.h>
|
|
#include <asm-generic/bitops/ext2-atomic.h>
|
|
#include <asm-generic/bitops/minix.h>
|
|
#include <asm-generic/bitops/fls.h>
|
|
#include <asm-generic/bitops/__fls.h>
|
|
#include <asm-generic/bitops/fls64.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __ASM_SH_BITOPS_H */
|