patch-2.3.99-pre8 linux/include/asm-s390/ebcdic.h

• Lines: 52
• Date: Fri May 12 11:41:44 2000
• Orig file: v2.3.99-pre7/linux/include/asm-s390/ebcdic.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre7/linux/include/asm-s390/ebcdic.h linux/include/asm-s390/ebcdic.h
@@ -0,0 +1,51 @@
+/*
+ *  include/asm-s390/ebcdic.h
+ *    EBCDIC -> ASCII, ASCII -> EBCDIC conversion routines.
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky <[email protected]>
+ */
+
+#ifndef _EBCDIC_H
+#define _EBCDIC_H
+
+#ifndef _S390_TYPES_H
+#include <types.h>
+#endif
+
+extern __u8 _ascebc[];   /* ASCII -> EBCDIC conversion table */
+extern __u8 _ebcasc[];   /* EBCDIC -> ASCII conversion table */
+extern __u8 _ebc_tolower[]; /* EBCDIC -> lowercase */
+extern __u8 _ebc_toupper[]; /* EBCDIC -> uppercase */
+
+extern __inline__ 
+void codepage_convert(const __u8 *codepage, volatile __u8 * addr, int nr)
+{
+        static const __u16 tr_op[] = { 0xDC00, 0x1000,0x3000 };
+        __asm__ __volatile__(
+                "   lr    1,%0\n"
+                "   lr    2,%1\n"
+                "   lr    3,%2\n"
+                "   ahi   2,-256\n"
+                "   jm    1f\n"
+                "0: tr    0(256,1),0(3)\n"
+                "   ahi   1,256\n"
+                "   ahi   2,-256\n"
+                "   jp    0b\n"
+                "1: ahi   2,255\n"
+                "   jm    2f\n"
+                "   ex    2,%3\n"
+                "2:"
+                : /* no output */ 
+                : "a" (addr), "d" (nr), "a" (codepage), "m" (tr_op[0])
+                : "cc", "memory", "1", "2", "3" );
+}
+
+#define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr)
+#define EBCASC(addr,nr) codepage_convert(_ebcasc, 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
+