LXR linux-bk/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__
  17static __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
  27static __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
  37static __inline__ void ___arch__swab64s(__u64 *x)
  38{
  39        *x = ___arch__swab64p(x);
  40}
  41#endif /* __s390x__ */
  42
  43static __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
  61static __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
  75static __inline__ void ___arch__swab32s(__u32 *x)
  76{
  77        *x = ___arch__swab32p(x);
  78}
  79
  80static __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
  96static __inline__ __u16 ___arch__swab16(__u16 x)
  97{
  98        return ___arch__swab16p(&x);
  99}
 100
 101static __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 */
 132