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__ (
  22                 "   lrvg %0,%1"
  23                 : "=d" (result) : "m" (*x) );
  24         return result;
  25 }
  26
  27 static __inline__ __u64 ___arch__swab64(__u64 x)
  28 {
  29         __u64 result;
  30
  31         __asm__ __volatile__ (
  32                 "   lrvgr %0,%1"
  33                 : "=d" (result) : "d" (x) );
  34         return result;
  35 }
  36
  37 static __inline__ void ___arch__swab64s(__u64 *x)
  38 {
  39         *x = ___arch__swab64p(x);
  40 }
  41 #endif /* __s390x__ */
  42
  43 static __inline__ __u32 ___arch__swab32p(const __u32 *x)
  44 {
  45         __u32 result;
  46
  47         __asm__ __volatile__ (
  48 #ifndef __s390x__
  49                 "        icm   %0,8,3(%1)\n"
  50                 "        icm   %0,4,2(%1)\n"
  51                 "        icm   %0,2,1(%1)\n"
  52                 "        ic    %0,0(%1)"
  53                 : "=&d" (result) : "a" (x), "m" (*x) : "cc" );
  54 #else /* __s390x__ */
  55                 "   lrv  %0,%1"
  56                 : "=d" (result) : "m" (*x) );
  57 #endif /* __s390x__ */
  58         return result;
  59 }
  60
  61 static __inline__ __u32 ___arch__swab32(__u32 x)
  62 {
  63 #ifndef __s390x__
  64         return ___arch__swab32p(&x);
  65 #else /* __s390x__ */
  66         __u32 result;
  67
  68         __asm__ __volatile__ (
  69                 "   lrvr  %0,%1"
  70                 : "=d" (result) : "d" (x) );
  71         return result;
  72 #endif /* __s390x__ */
  73 }
  74
  75 static __inline__ void ___arch__swab32s(__u32 *x)
  76 {
  77         *x = ___arch__swab32p(x);
  78 }
  79
  80 static __inline__ __u16 ___arch__swab16p(const __u16 *x)
  81 {
  82         __u16 result;
  83
  84         __asm__ __volatile__ (
  85 #ifndef __s390x__
  86                 "        icm   %0,2,1(%1)\n"
  87                 "        ic    %0,0(%1)\n"
  88                 : "=&d" (result) : "a" (x), "m" (*x) : "cc" );
  89 #else /* __s390x__ */
  90                 "   lrvh %0,%1"
  91                 : "=d" (result) : "m" (*x) );
  92 #endif /* __s390x__ */
  93         return result;
  94 }
  95
  96 static __inline__ __u16 ___arch__swab16(__u16 x)
  97 {
  98         return ___arch__swab16p(&x);
  99 }
 100
 101 static __inline__ void ___arch__swab16s(__u16 *x)
 102 {
 103         *x = ___arch__swab16p(x);
 104 }
 105
 106 #ifdef __s390x__
 107 #define __arch__swab64(x) ___arch__swab64(x)
 108 #define __arch__swab64p(x) ___arch__swab64p(x)
 109 #define __arch__swab64s(x) ___arch__swab64s(x)
 110 #endif /* __s390x__ */
 111 #define __arch__swab32(x) ___arch__swab32(x)
 112 #define __arch__swab16(x) ___arch__swab16(x)
 113 #define __arch__swab32p(x) ___arch__swab32p(x)
 114 #define __arch__swab16p(x) ___arch__swab16p(x)
 115 #define __arch__swab32s(x) ___arch__swab32s(x)
 116 #define __arch__swab16s(x) ___arch__swab16s(x)
 117
 118 #ifndef __s390x__
 119 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
 120 #  define __BYTEORDER_HAS_U64__
 121 #  define __SWAB_64_THRU_32__
 122 #endif
 123 #else /* __s390x__ */
 124 #define __BYTEORDER_HAS_U64__
 125 #endif /* __s390x__ */
 126
 127 #endif /* __GNUC__ */
 128
 129 #include <linux/byteorder/big_endian.h>
 130
 131 #endif /* _S390_BYTEORDER_H */