arch/sh/include/asm/bitops.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_BITOPS_H
   3 #define __ASM_SH_BITOPS_H
   4
   5 #ifndef _LINUX_BITOPS_H
   6 #error only <linux/bitops.h> can be included directly
   7 #endif
   8
   9 /* For __swab32 */
  10 #include <asm/byteorder.h>
  11 #include <asm/barrier.h>
  12
  13 #ifdef CONFIG_GUSA_RB
  14 #include <asm/bitops-grb.h>
  15 #elif defined(CONFIG_CPU_SH2A)
  16 #include <asm-generic/bitops/atomic.h>
  17 #include <asm/bitops-op32.h>
  18 #elif defined(CONFIG_CPU_SH4A)
  19 #include <asm/bitops-llsc.h>
  20 #elif defined(CONFIG_CPU_J2) && defined(CONFIG_SMP)
  21 #include <asm/bitops-cas.h>
  22 #else
  23 #include <asm-generic/bitops/atomic.h>
  24 #include <asm-generic/bitops/non-atomic.h>
  25 #endif
  26
  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
  61 #include <asm-generic/bitops/ffs.h>
  62 #include <asm-generic/bitops/hweight.h>
  63 #include <asm-generic/bitops/lock.h>
  64 #include <asm-generic/bitops/sched.h>
  65 #include <asm-generic/bitops/ext2-atomic.h>
  66 #include <asm-generic/bitops/fls.h>
  67 #include <asm-generic/bitops/__fls.h>
  68 #include <asm-generic/bitops/fls64.h>
  69
  70 #include <asm-generic/bitops/le.h>
  71
  72 #endif /* __ASM_SH_BITOPS_H */