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/*
* EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
*
* S390 version
* Copyright IBM Corp. 1999
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _EBCDIC_H
#define _EBCDIC_H
#ifndef _S390_TYPES_H
#include <types.h>
#endif
extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */
extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */
extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */
extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */
extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */
static inline void
codepage_convert(const __u8 *codepage, volatile __u8 * addr, unsigned long nr)
{
if (nr-- <= 0)
return;
asm volatile(
" bras 1,1f\n"
" tr 0(1,%0),0(%2)\n"
"0: tr 0(256,%0),0(%2)\n"
" la %0,256(%0)\n"
"1: ahi %1,-256\n"
" jnm 0b\n"
" ex %1,0(1)"
: "+&a" (addr), "+&a" (nr)
: "a" (codepage) : "cc", "memory", "1");
}
#define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
#define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
#define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
#define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
#define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
#define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
#endif