LXR linux/arch/sh/include/asm/bitops.h

   1#ifndef __ASM_SH_BITOPS_H
   2#define __ASM_SH_BITOPS_H
   3
   4#ifdef __KERNEL__
   5
   6#ifndef _LINUX_BITOPS_H
   7#error only <linux/bitops.h> can be included directly
   8#endif
   9
  10/* For __swab32 */
  11#include <asm/byteorder.h>
  12#include <asm/barrier.h>
  13
  14#ifdef CONFIG_GUSA_RB
  15#include <asm/bitops-grb.h>
  16#elif defined(CONFIG_CPU_SH2A)
  17#include <asm-generic/bitops/atomic.h>
  18#include <asm/bitops-op32.h>
  19#elif defined(CONFIG_CPU_SH4A)
  20#include <asm/bitops-llsc.h>
  21#else
  22#include <asm-generic/bitops/atomic.h>
  23#include <asm-generic/bitops/non-atomic.h>
  24#endif
  25
  26#ifdef CONFIG_SUPERH32
  27static inline unsigned long ffz(unsigned long word)
  28{
  29        unsigned long result;
  30
  31        __asm__("1:\n\t"
  32                "shlr   %1\n\t"
  33                "bt/s   1b\n\t"
  34                " add   #1, %0"
  35                : "=r" (result), "=r" (word)
  36                : "0" (~0L), "1" (word)
  37                : "t");
  38        return result;
  39}
  40
  41/**
  42 * __ffs - find first bit in word.
  43 * @word: The word to search
  44 *
  45 * Undefined if no bit exists, so code should check against 0 first.
  46 */
  47static inline unsigned long __ffs(unsigned long word)
  48{
  49        unsigned long result;
  50
  51        __asm__("1:\n\t"
  52                "shlr   %1\n\t"
  53                "bf/s   1b\n\t"
  54                " add   #1, %0"
  55                : "=r" (result), "=r" (word)
  56                : "0" (~0L), "1" (word)
  57                : "t");
  58        return result;
  59}
  60#else
  61static inline unsigned long ffz(unsigned long word)
  62{
  63        unsigned long result, __d2, __d3;
  64
  65        __asm__("gettr  tr0, %2\n\t"
  66                "pta    $+32, tr0\n\t"
  67                "andi   %1, 1, %3\n\t"
  68                "beq    %3, r63, tr0\n\t"
  69                "pta    $+4, tr0\n"
  70                "0:\n\t"
  71                "shlri.l        %1, 1, %1\n\t"
  72                "addi   %0, 1, %0\n\t"
  73                "andi   %1, 1, %3\n\t"
  74                "beqi   %3, 1, tr0\n"
  75                "1:\n\t"
  76                "ptabs  %2, tr0\n\t"
  77                : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
  78                : "0" (0L), "1" (word));
  79
  80        return result;
  81}
  82
  83#include <asm-generic/bitops/__ffs.h>
  84#endif
  85
  86#include <asm-generic/bitops/find.h>
  87#include <asm-generic/bitops/ffs.h>
  88#include <asm-generic/bitops/hweight.h>
  89#include <asm-generic/bitops/lock.h>
  90#include <asm-generic/bitops/sched.h>
  91#include <asm-generic/bitops/le.h>
  92#include <asm-generic/bitops/ext2-atomic.h>
  93#include <asm-generic/bitops/fls.h>
  94#include <asm-generic/bitops/__fls.h>
  95#include <asm-generic/bitops/fls64.h>
  96
  97#endif /* __KERNEL__ */
  98
  99#endif /* __ASM_SH_BITOPS_H */
 100