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
  27 static 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  */
  47 static 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
  61 static 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 */