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 #include <asm/system.h>
  11 /* For __swab32 */
  12 #include <asm/byteorder.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 /*
  27  * clear_bit() doesn't provide any barrier for the compiler.
  28  */
  29 #define smp_mb__before_clear_bit()      smp_mb()
  30 #define smp_mb__after_clear_bit()       smp_mb()
  31
  32 #ifdef CONFIG_SUPERH32
  33 static inline unsigned long ffz(unsigned long word)
  34 {
  35         unsigned long result;
  36
  37         __asm__("1:\n\t"
  38                 "shlr   %1\n\t"
  39                 "bt/s   1b\n\t"
  40                 " add   #1, %0"
  41                 : "=r" (result), "=r" (word)
  42                 : "0" (~0L), "1" (word)
  43                 : "t");
  44         return result;
  45 }
  46
  47 /**
  48  * __ffs - find first bit in word.
  49  * @word: The word to search
  50  *
  51  * Undefined if no bit exists, so code should check against 0 first.
  52  */
  53 static inline unsigned long __ffs(unsigned long word)
  54 {
  55         unsigned long result;
  56
  57         __asm__("1:\n\t"
  58                 "shlr   %1\n\t"
  59                 "bf/s   1b\n\t"
  60                 " add   #1, %0"
  61                 : "=r" (result), "=r" (word)
  62                 : "0" (~0L), "1" (word)
  63                 : "t");
  64         return result;
  65 }
  66 #else
  67 static inline unsigned long ffz(unsigned long word)
  68 {
  69         unsigned long result, __d2, __d3;
  70
  71         __asm__("gettr  tr0, %2\n\t"
  72                 "pta    $+32, tr0\n\t"
  73                 "andi   %1, 1, %3\n\t"
  74                 "beq    %3, r63, tr0\n\t"
  75                 "pta    $+4, tr0\n"
  76                 "0:\n\t"
  77                 "shlri.l        %1, 1, %1\n\t"
  78                 "addi   %0, 1, %0\n\t"
  79                 "andi   %1, 1, %3\n\t"
  80                 "beqi   %3, 1, tr0\n"
  81                 "1:\n\t"
  82                 "ptabs  %2, tr0\n\t"
  83                 : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
  84                 : "0" (0L), "1" (word));
  85
  86         return result;
  87 }
  88
  89 #include <asm-generic/bitops/__ffs.h>
  90 #endif
  91
  92 #include <asm-generic/bitops/find.h>
  93 #include <asm-generic/bitops/ffs.h>
  94 #include <asm-generic/bitops/hweight.h>
  95 #include <asm-generic/bitops/lock.h>
  96 #include <asm-generic/bitops/sched.h>
  97 #include <asm-generic/bitops/le.h>
  98 #include <asm-generic/bitops/ext2-atomic.h>
  99 #include <asm-generic/bitops/fls.h>
 100 #include <asm-generic/bitops/__fls.h>
 101 #include <asm-generic/bitops/fls64.h>
 102
 103 #endif /* __KERNEL__ */
 104
 105 #endif /* __ASM_SH_BITOPS_H */