LXR linux/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
  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
  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#include <asm-generic/bitops/find.h>
  72
  73#endif /* __ASM_SH_BITOPS_H */
  74