arch/nds32/include/asm/swab.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 // Copyright (C) 2005-2017 Andes Technology Corporation
   3
   4 #ifndef __NDS32_SWAB_H__
   5 #define __NDS32_SWAB_H__
   6
   7 #include <linux/types.h>
   8 #include <linux/compiler.h>
   9
  10 static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
  11 {
  12         __asm__("wsbh   %0, %0\n\t"     /* word swap byte within halfword */
  13                 "rotri  %0, %0, #16\n"
  14                 :"=r"(x)
  15                 :"0"(x));
  16         return x;
  17 }
  18
  19 static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
  20 {
  21         __asm__("wsbh   %0, %0\n"       /* word swap byte within halfword */
  22                 :"=r"(x)
  23                 :"0"(x));
  24         return x;
  25 }
  26
  27 #define __arch_swab32(x) ___arch__swab32(x)
  28 #define __arch_swab16(x) ___arch__swab16(x)
  29
  30 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
  31 #define __BYTEORDER_HAS_U64__
  32 #define __SWAB_64_THRU_32__
  33 #endif
  34
  35 #endif /* __NDS32_SWAB_H__ */