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-rw-r--r--sysdeps/s390/bits/string.h231
1 files changed, 231 insertions, 0 deletions
diff --git a/sysdeps/s390/bits/string.h b/sysdeps/s390/bits/string.h
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+++ b/sysdeps/s390/bits/string.h
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+/* Optimized, inlined string functions. S/390 version.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _STRING_H
+# error "Never use <bits/string.h> directly; include <string.h> instead."
+#endif
+
+/* The s390 processors can access unaligned multi-byte variables. */
+#define _STRING_ARCH_unaligned 1
+
+/* We only provide optimizations if the user selects them and if
+ GNU CC is used. */
+#if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \
+ && defined __GNUC__ && __GNUC__ >= 2
+
+#ifndef __STRING_INLINE
+# ifdef __cplusplus
+# define __STRING_INLINE inline
+# else
+# define __STRING_INLINE extern __inline
+# endif
+#endif
+
+#define _HAVE_STRING_ARCH_strlen 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE size_t
+strlen (__const char *__str)
+{
+ char *__ptr, *__tmp;
+
+ __ptr = (char *) 0;
+ __tmp = (char *) __str;
+ __asm__ __volatile__ (" la 0,0\n"
+ "0: srst %0,%1\n"
+ " jo 0b\n"
+ : "+&a" (__ptr), "+&a" (__tmp) :
+ : "cc", "0" );
+ return (size_t) (__ptr - __str);
+}
+#endif
+
+/* Copy SRC to DEST. */
+#define _HAVE_STRING_ARCH_strcpy 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE char *
+strcpy (char *__dest, __const char *__src)
+{
+ char *tmp = __dest;
+
+ __asm__ __volatile__ (" la 0,0\n"
+ "0: mvst %0,%1\n"
+ " jo 0b"
+ : "+&a" (__dest), "+&a" (__src) :
+ : "cc", "memory", "0" );
+ return tmp;
+}
+#endif
+
+#define _HAVE_STRING_ARCH_strncpy 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE char *
+strncpy (char *__dest, __const char *__src, size_t __n)
+{
+ char *__ret = __dest;
+ char *__ptr;
+ size_t __diff;
+
+ if (__n > 0) {
+ __diff = (size_t) (__dest - __src);
+ __ptr = (char *) __src;
+ __asm__ __volatile__ (" j 1f\n"
+ "0: la %0,1(%0)\n"
+ "1: icm 0,1,0(%0)\n"
+ " stc 0,0(%2,%0)\n"
+ " jz 3f\n"
+#if defined(__s390x__)
+ " brctg %1,0b\n"
+#else
+ " brct %1,0b\n"
+#endif
+ " j 4f\n"
+ "2: la %0,1(%0)\n"
+ " stc 0,0(%2,%0)\n"
+#if defined(__s390x__)
+ "3: brctg %1,2b\n"
+#else
+ "3: brct %1,2b\n"
+#endif
+ "4:"
+ : "+&a" (__ptr), "+&a" (__n) : "a" (__diff)
+ : "cc", "0" );
+ }
+ return __ret;
+}
+#endif
+
+/* Append SRC onto DEST. */
+#define _HAVE_STRING_ARCH_strcat 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE char *
+strcat(char *__dest, const char *__src)
+{
+ char *__ret = __dest;
+ char *__ptr, *__tmp;
+
+ /* Move __ptr to the end of __dest. */
+ __ptr = (char *) 0;
+ __tmp = __dest;
+ __asm__ __volatile__ (" la 0,0\n"
+ "0: srst %0,%1\n"
+ " jo 0b\n"
+ : "+&a" (__ptr), "+&a" (__tmp) :
+ : "cc", "0" );
+
+ /* Now do the copy. */
+ __asm__ __volatile__ (" la 0,0\n"
+ "0: mvst %0,%1\n"
+ " jo 0b"
+ : "+&a" (__ptr), "+&a" (__src) :
+ : "cc", "0" );
+ return __ret;
+}
+#endif
+
+/* Append no more than N characters from SRC onto DEST. */
+#define _HAVE_STRING_ARCH_strncat 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE char *
+strncat (char *__dest, __const char *__src, size_t __n)
+{
+ char *__ret = __dest;
+ char *__ptr, *__tmp;
+ size_t __diff;
+
+ if (__n > 0) {
+ /* Move __ptr to the end of __dest. */
+ __ptr = (char *) 0;
+ __tmp = __dest;
+ __asm__ __volatile__ (" la 0,0\n"
+ "0: srst %0,%1\n"
+ " jo 0b\n"
+ : "+&a" (__ptr), "+&a" (__tmp) :
+ : "cc", "0" );
+
+ __diff = (size_t) (__ptr - __src);
+ __tmp = (char *) __src;
+ __asm__ __volatile__ (" j 1f\n"
+ "0: la %0,1(%0)\n"
+ "1: icm 0,1,0(%0)\n"
+ " stc 0,0(%2,%0)\n"
+ " jz 2f\n"
+#if defined(__s390x__)
+ " brctg %1,0b\n"
+#else
+ " brct %1,0b\n"
+#endif
+ " slr 0,0\n"
+ " stc 0,1(%2,%0)\n"
+ "2:"
+ : "+&a" (__tmp), "+&a" (__n) : "a" (__diff)
+ : "cc", "0" );
+
+ }
+ return __ret;
+}
+#endif
+
+/* Search N bytes of S for C. */
+#define _HAVE_STRING_ARCH_memchr 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE void *
+memchr (__const void *__str, int __c, size_t __n)
+{
+ char *__ptr, *__tmp;
+
+ __tmp = (char *) __str;
+ __ptr = (char *) __tmp + __n;
+ __asm__ __volatile__ (" lhi 0,0xff\n"
+ " nr 0,%2\n"
+ "0: srst %0,%1\n"
+ " jo 0b\n"
+ " brc 13,1f\n"
+ " la %0,0\n"
+ "1:"
+ : "+&a" (__ptr), "+&a" (__tmp) : "d" (__c)
+ : "cc", "0" );
+ return __ptr;
+}
+#endif
+
+/* Search N bytes of S for C. */
+#define _HAVE_STRING_ARCH_memchr 1
+#ifndef _FORCE_INLINES
+__STRING_INLINE int
+strcmp (__const char *__s1, __const char *__s2)
+{
+ char *__p1, *__p2;
+ int __ret;
+
+ __p1 = (char *) __s1;
+ __p2 = (char *) __s2;
+ __asm__ __volatile__ (" slr 0,0\n"
+ "0: clst %1,%2\n"
+ " jo 0b\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (__ret), "+&a" (__p1), "+&a" (__p2) :
+ : "cc", "0" );
+ __ret = (__ret == 0) ? 0 : (__ret == 1) ? -1 : 1;
+ return __ret;
+}
+#endif
+
+#endif /* Use string inlines && GNU CC. */
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