root/arch/sh/include/asm/bitops.h

INCLUDED FROM

DEFINITIONS

1. ffz
2. __ffs
3. ffz

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_BITOPS_H
   3 #define __ASM_SH_BITOPS_H
   4 
   5 #ifdef __KERNEL__
   6 
   7 #ifndef _LINUX_BITOPS_H
   8 #error only <linux/bitops.h> can be included directly
   9 #endif
  10 
  11 /* For __swab32 */
  12 #include <asm/byteorder.h>
  13 #include <asm/barrier.h>
  14 
  15 #ifdef CONFIG_GUSA_RB
  16 #include <asm/bitops-grb.h>
  17 #elif defined(CONFIG_CPU_SH2A)
  18 #include <asm-generic/bitops/atomic.h>
  19 #include <asm/bitops-op32.h>
  20 #elif defined(CONFIG_CPU_SH4A)
  21 #include <asm/bitops-llsc.h>
  22 #elif defined(CONFIG_CPU_J2) && defined(CONFIG_SMP)
  23 #include <asm/bitops-cas.h>
  24 #else
  25 #include <asm-generic/bitops/atomic.h>
  26 #include <asm-generic/bitops/non-atomic.h>
  27 #endif
  28 
  29 #ifdef CONFIG_SUPERH32
  30 static inline unsigned long ffz(unsigned long word)
  31 {
  32         unsigned long result;
  33 
  34         __asm__("1:\n\t"
  35                 "shlr   %1\n\t"
  36                 "bt/s   1b\n\t"
  37                 " add   #1, %0"
  38                 : "=r" (result), "=r" (word)
  39                 : "0" (~0L), "1" (word)
  40                 : "t");
  41         return result;
  42 }
  43 
  44 /**
  45  * __ffs - find first bit in word.
  46  * @word: The word to search
  47  *
  48  * Undefined if no bit exists, so code should check against 0 first.
  49  */
  50 static inline unsigned long __ffs(unsigned long word)
  51 {
  52         unsigned long result;
  53 
  54         __asm__("1:\n\t"
  55                 "shlr   %1\n\t"
  56                 "bf/s   1b\n\t"
  57                 " add   #1, %0"
  58                 : "=r" (result), "=r" (word)
  59                 : "0" (~0L), "1" (word)
  60                 : "t");
  61         return result;
  62 }
  63 #else
  64 static inline unsigned long ffz(unsigned long word)
  65 {
  66         unsigned long result, __d2, __d3;
  67 
  68         __asm__("gettr  tr0, %2\n\t"
  69                 "pta    $+32, tr0\n\t"
  70                 "andi   %1, 1, %3\n\t"
  71                 "beq    %3, r63, tr0\n\t"
  72                 "pta    $+4, tr0\n"
  73                 "0:\n\t"
  74                 "shlri.l        %1, 1, %1\n\t"
  75                 "addi   %0, 1, %0\n\t"
  76                 "andi   %1, 1, %3\n\t"
  77                 "beqi   %3, 1, tr0\n"
  78                 "1:\n\t"
  79                 "ptabs  %2, tr0\n\t"
  80                 : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
  81                 : "0" (0L), "1" (word));
  82 
  83         return result;
  84 }
  85 
  86 #include <asm-generic/bitops/__ffs.h>
  87 #endif
  88 
  89 #include <asm-generic/bitops/find.h>
  90 #include <asm-generic/bitops/ffs.h>
  91 #include <asm-generic/bitops/hweight.h>
  92 #include <asm-generic/bitops/lock.h>
  93 #include <asm-generic/bitops/sched.h>
  94 #include <asm-generic/bitops/le.h>
  95 #include <asm-generic/bitops/ext2-atomic.h>
  96 #include <asm-generic/bitops/fls.h>
  97 #include <asm-generic/bitops/__fls.h>
  98 #include <asm-generic/bitops/fls64.h>
  99 
 100 #endif /* __KERNEL__ */
 101 
 102 #endif /* __ASM_SH_BITOPS_H */