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061a5e4ac3
The inline assembly uses the ahi instruction to decrement and test whether more than 256 bytes are left for conversion. But the nr variable passed is of type unsigned long. Therefore use aghi. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reported-by: Jens Remus <jremus@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
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*
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* S390 version
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* Copyright IBM Corp. 1999
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef _EBCDIC_H
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#define _EBCDIC_H
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#include <linux/types.h>
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extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
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extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */
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extern __u8 _ascebc[256]; /* ASCII -> EBCDIC conversion table */
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extern __u8 _ebcasc[256]; /* EBCDIC -> ASCII conversion table */
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extern __u8 _ebc_tolower[256]; /* EBCDIC -> lowercase */
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extern __u8 _ebc_toupper[256]; /* EBCDIC -> uppercase */
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static inline void
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codepage_convert(const __u8 *codepage, volatile char *addr, unsigned long nr)
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{
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if (!nr--)
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return;
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asm volatile(
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" j 2f\n"
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"0: tr 0(1,%0),0(%2)\n"
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"1: tr 0(256,%0),0(%2)\n"
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" la %0,256(%0)\n"
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"2: aghi %1,-256\n"
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" jnm 1b\n"
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" exrl %1,0b"
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: "+&a" (addr), "+&a" (nr)
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: "a" (codepage) : "cc", "memory");
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}
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#define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
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#define EBCASC(addr,nr) codepage_convert(_ebcasc, addr, nr)
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#define ASCEBC_500(addr,nr) codepage_convert(_ascebc_500, addr, nr)
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#define EBCASC_500(addr,nr) codepage_convert(_ebcasc_500, addr, nr)
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#define EBC_TOLOWER(addr,nr) codepage_convert(_ebc_tolower, addr, nr)
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#define EBC_TOUPPER(addr,nr) codepage_convert(_ebc_toupper, addr, nr)
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#endif
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