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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  #ifndef _ASM_X86_SWAB_H
       3  #define _ASM_X86_SWAB_H
       4  
       5  #include <linux/types.h>
       6  
       7  
       8  static __inline__  __u32 __arch_swab32(__u32 val)
       9  {
      10  	__asm__("bswapl %0" : "=r" (val) : "0" (val));
      11  	return val;
      12  }
      13  #define __arch_swab32 __arch_swab32
      14  
      15  static __inline__  __u64 __arch_swab64(__u64 val)
      16  {
      17  #ifdef __i386__
      18  	union {
      19  		struct {
      20  			__u32 a;
      21  			__u32 b;
      22  		} s;
      23  		__u64 u;
      24  	} v;
      25  	v.u = val;
      26  	__asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
      27  	    : "=r" (v.s.a), "=r" (v.s.b)
      28  	    : "0" (v.s.a), "1" (v.s.b));
      29  	return v.u;
      30  #else /* __i386__ */
      31  	__asm__("bswapq %0" : "=r" (val) : "0" (val));
      32  	return val;
      33  #endif
      34  }
      35  #define __arch_swab64 __arch_swab64
      36  
      37  #endif /* _ASM_X86_SWAB_H */