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kernel/linux-rt-4.4.41/arch/sh/include/asm/bitops.h 2.26 KB
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  #ifndef __ASM_SH_BITOPS_H
  #define __ASM_SH_BITOPS_H
  
  #ifdef __KERNEL__
  
  #ifndef _LINUX_BITOPS_H
  #error only <linux/bitops.h> can be included directly
  #endif
  
  /* For __swab32 */
  #include <asm/byteorder.h>
  #include <asm/barrier.h>
  
  #ifdef CONFIG_GUSA_RB
  #include <asm/bitops-grb.h>
  #elif defined(CONFIG_CPU_SH2A)
  #include <asm-generic/bitops/atomic.h>
  #include <asm/bitops-op32.h>
  #elif defined(CONFIG_CPU_SH4A)
  #include <asm/bitops-llsc.h>
  #else
  #include <asm-generic/bitops/atomic.h>
  #include <asm-generic/bitops/non-atomic.h>
  #endif
  
  #ifdef CONFIG_SUPERH32
  static inline unsigned long ffz(unsigned long word)
  {
  	unsigned long result;
  
  	__asm__("1:
  \t"
  		"shlr	%1
  \t"
  		"bt/s	1b
  \t"
  		" add	#1, %0"
  		: "=r" (result), "=r" (word)
  		: "0" (~0L), "1" (word)
  		: "t");
  	return result;
  }
  
  /**
   * __ffs - find first bit in word.
   * @word: The word to search
   *
   * Undefined if no bit exists, so code should check against 0 first.
   */
  static inline unsigned long __ffs(unsigned long word)
  {
  	unsigned long result;
  
  	__asm__("1:
  \t"
  		"shlr	%1
  \t"
  		"bf/s	1b
  \t"
  		" add	#1, %0"
  		: "=r" (result), "=r" (word)
  		: "0" (~0L), "1" (word)
  		: "t");
  	return result;
  }
  #else
  static inline unsigned long ffz(unsigned long word)
  {
  	unsigned long result, __d2, __d3;
  
          __asm__("gettr  tr0, %2
  \t"
                  "pta    $+32, tr0
  \t"
                  "andi   %1, 1, %3
  \t"
                  "beq    %3, r63, tr0
  \t"
                  "pta    $+4, tr0
  "
                  "0:
  \t"
                  "shlri.l        %1, 1, %1
  \t"
                  "addi   %0, 1, %0
  \t"
                  "andi   %1, 1, %3
  \t"
                  "beqi   %3, 1, tr0
  "
                  "1:
  \t"
                  "ptabs  %2, tr0
  \t"
                  : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3)
                  : "0" (0L), "1" (word));
  
  	return result;
  }
  
  #include <asm-generic/bitops/__ffs.h>
  #endif
  
  #include <asm-generic/bitops/find.h>
  #include <asm-generic/bitops/ffs.h>
  #include <asm-generic/bitops/hweight.h>
  #include <asm-generic/bitops/lock.h>
  #include <asm-generic/bitops/sched.h>
  #include <asm-generic/bitops/le.h>
  #include <asm-generic/bitops/ext2-atomic.h>
  #include <asm-generic/bitops/fls.h>
  #include <asm-generic/bitops/__fls.h>
  #include <asm-generic/bitops/fls64.h>
  
  #endif /* __KERNEL__ */
  
  #endif /* __ASM_SH_BITOPS_H */