include/asm-mips/byteorder.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1996, 99, 2003 by Ralf Baechle
   7  */
   8 #ifndef _ASM_BYTEORDER_H
   9 #define _ASM_BYTEORDER_H
  10
  11 #include <asm/types.h>
  12
  13 #ifdef __GNUC__
  14
  15 #ifdef CONFIG_CPU_MIPSR2
  16
  17 static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
  18 {
  19         __asm__(
  20         "       wsbh    %0, %1                  \n"
  21         : "=r" (x)
  22         : "r" (x));
  23
  24         return x;
  25 }
  26 #define __arch__swab16(x)       ___arch__swab16(x)
  27
  28 static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
  29 {
  30         __asm__(
  31         "       wsbh    %0, %1                  \n"
  32         "       rotr    %0, %0, 16              \n"
  33         : "=r" (x)
  34         : "r" (x));
  35
  36         return x;
  37 }
  38 #define __arch__swab32(x)       ___arch__swab32(x)
  39
  40 #ifdef CONFIG_CPU_MIPS64_R2
  41
  42 static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
  43 {
  44         __asm__(
  45         "       dsbh    %0, %1                  \n"
  46         "       dshd    %0, %0                  \n"
  47         "       drotr   %0, %0, 32              \n"
  48         : "=r" (x)
  49         : "r" (x));
  50
  51         return x;
  52 }
  53
  54 #define __arch__swab64(x)       ___arch__swab64(x)
  55
  56 #endif /* CONFIG_CPU_MIPS64_R2 */
  57
  58 #endif /* CONFIG_CPU_MIPSR2 */
  59
  60 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
  61 #  define __BYTEORDER_HAS_U64__
  62 #  define __SWAB_64_THRU_32__
  63 #endif
  64
  65 #endif /* __GNUC__ */
  66
  67 #if defined(__MIPSEB__)
  68 #  include <linux/byteorder/big_endian.h>
  69 #elif defined(__MIPSEL__)
  70 #  include <linux/byteorder/little_endian.h>
  71 #else
  72 #  error "MIPS, but neither __MIPSEB__, nor __MIPSEL__???"
  73 #endif
  74
  75 #endif /* _ASM_BYTEORDER_H */