include/asm-s390/byteorder.h

   1 #ifndef _S390_BYTEORDER_H
   2 #define _S390_BYTEORDER_H
   3
   4 /*
   5  *  include/asm-s390/byteorder.h
   6  *
   7  *  S390 version
   8  *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   9  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
  10  */
  11
  12 #include <asm/types.h>
  13
  14 #ifdef __GNUC__
  15
  16 #ifdef __s390x__
  17 static inline __u64 ___arch__swab64p(const __u64 *x)
  18 {
  19         __u64 result;
  20
  21         asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
  22         return result;
  23 }
  24
  25 static inline __u64 ___arch__swab64(__u64 x)
  26 {
  27         __u64 result;
  28
  29         asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
  30         return result;
  31 }
  32
  33 static inline void ___arch__swab64s(__u64 *x)
  34 {
  35         *x = ___arch__swab64p(x);
  36 }
  37 #endif /* __s390x__ */
  38
  39 static inline __u32 ___arch__swab32p(const __u32 *x)
  40 {
  41         __u32 result;
  42
  43         asm volatile(
  44 #ifndef __s390x__
  45                 "       icm     %0,8,3(%1)\n"
  46                 "       icm     %0,4,2(%1)\n"
  47                 "       icm     %0,2,1(%1)\n"
  48                 "       ic      %0,0(%1)"
  49                 : "=&d" (result) : "a" (x), "m" (*x) : "cc");
  50 #else /* __s390x__ */
  51                 "       lrv     %0,%1"
  52                 : "=d" (result) : "m" (*x));
  53 #endif /* __s390x__ */
  54         return result;
  55 }
  56
  57 static inline __u32 ___arch__swab32(__u32 x)
  58 {
  59 #ifndef __s390x__
  60         return ___arch__swab32p(&x);
  61 #else /* __s390x__ */
  62         __u32 result;
  63
  64         asm volatile("lrvr  %0,%1" : "=d" (result) : "d" (x));
  65         return result;
  66 #endif /* __s390x__ */
  67 }
  68
  69 static __inline__ void ___arch__swab32s(__u32 *x)
  70 {
  71         *x = ___arch__swab32p(x);
  72 }
  73
  74 static __inline__ __u16 ___arch__swab16p(const __u16 *x)
  75 {
  76         __u16 result;
  77
  78         asm volatile(
  79 #ifndef __s390x__
  80                 "       icm     %0,2,1(%1)\n"
  81                 "       ic      %0,0(%1)\n"
  82                 : "=&d" (result) : "a" (x), "m" (*x) : "cc");
  83 #else /* __s390x__ */
  84                 "       lrvh    %0,%1"
  85                 : "=d" (result) : "m" (*x));
  86 #endif /* __s390x__ */
  87         return result;
  88 }
  89
  90 static __inline__ __u16 ___arch__swab16(__u16 x)
  91 {
  92         return ___arch__swab16p(&x);
  93 }
  94
  95 static __inline__ void ___arch__swab16s(__u16 *x)
  96 {
  97         *x = ___arch__swab16p(x);
  98 }
  99
 100 #ifdef __s390x__
 101 #define __arch__swab64(x) ___arch__swab64(x)
 102 #define __arch__swab64p(x) ___arch__swab64p(x)
 103 #define __arch__swab64s(x) ___arch__swab64s(x)
 104 #endif /* __s390x__ */
 105 #define __arch__swab32(x) ___arch__swab32(x)
 106 #define __arch__swab16(x) ___arch__swab16(x)
 107 #define __arch__swab32p(x) ___arch__swab32p(x)
 108 #define __arch__swab16p(x) ___arch__swab16p(x)
 109 #define __arch__swab32s(x) ___arch__swab32s(x)
 110 #define __arch__swab16s(x) ___arch__swab16s(x)
 111
 112 #ifndef __s390x__
 113 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
 114 #  define __BYTEORDER_HAS_U64__
 115 #  define __SWAB_64_THRU_32__
 116 #endif
 117 #else /* __s390x__ */
 118 #define __BYTEORDER_HAS_U64__
 119 #endif /* __s390x__ */
 120
 121 #endif /* __GNUC__ */
 122
 123 #include <linux/byteorder/big_endian.h>
 124
 125 #endif /* _S390_BYTEORDER_H */