/* Copyright (c) 2009 Xilinx, Inc. All rights reserved.
|
/* Copyright (c) 2009 Xilinx, Inc. All rights reserved.
|
|
|
Redistribution and use in source and binary forms, with or without
|
Redistribution and use in source and binary forms, with or without
|
modification, are permitted provided that the following conditions are
|
modification, are permitted provided that the following conditions are
|
met:
|
met:
|
|
|
1. Redistributions source code must retain the above copyright notice,
|
1. Redistributions source code must retain the above copyright notice,
|
this list of conditions and the following disclaimer.
|
this list of conditions and the following disclaimer.
|
|
|
2. Redistributions in binary form must reproduce the above copyright
|
2. Redistributions in binary form must reproduce the above copyright
|
notice, this list of conditions and the following disclaimer in the
|
notice, this list of conditions and the following disclaimer in the
|
documentation and/or other materials provided with the distribution.
|
documentation and/or other materials provided with the distribution.
|
|
|
3. Neither the name of Xilinx nor the names of its contributors may be
|
3. Neither the name of Xilinx nor the names of its contributors may be
|
used to endorse or promote products derived from this software without
|
used to endorse or promote products derived from this software without
|
specific prior written permission.
|
specific prior written permission.
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
|
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
FUNCTION
|
FUNCTION
|
<<strcpy>>---copy string
|
<<strcpy>>---copy string
|
|
|
INDEX
|
INDEX
|
strcpy
|
strcpy
|
|
|
ANSI_SYNOPSIS
|
ANSI_SYNOPSIS
|
#include <string.h>
|
#include <string.h>
|
char *strcpy(char *<[dst]>, const char *<[src]>);
|
char *strcpy(char *<[dst]>, const char *<[src]>);
|
|
|
TRAD_SYNOPSIS
|
TRAD_SYNOPSIS
|
#include <string.h>
|
#include <string.h>
|
char *strcpy(<[dst]>, <[src]>)
|
char *strcpy(<[dst]>, <[src]>)
|
char *<[dst]>;
|
char *<[dst]>;
|
char *<[src]>;
|
char *<[src]>;
|
|
|
DESCRIPTION
|
DESCRIPTION
|
<<strcpy>> copies the string pointed to by <[src]>
|
<<strcpy>> copies the string pointed to by <[src]>
|
(including the terminating null character) to the array
|
(including the terminating null character) to the array
|
pointed to by <[dst]>.
|
pointed to by <[dst]>.
|
|
|
RETURNS
|
RETURNS
|
This function returns the initial value of <[dst]>.
|
This function returns the initial value of <[dst]>.
|
|
|
PORTABILITY
|
PORTABILITY
|
<<strcpy>> is ANSI C.
|
<<strcpy>> is ANSI C.
|
|
|
<<strcpy>> requires no supporting OS subroutines.
|
<<strcpy>> requires no supporting OS subroutines.
|
|
|
QUICKREF
|
QUICKREF
|
strcpy ansi pure
|
strcpy ansi pure
|
*/
|
*/
|
|
|
#include <string.h>
|
#include <string.h>
|
#include <limits.h>
|
#include <limits.h>
|
|
|
/*SUPPRESS 560*/
|
/*SUPPRESS 560*/
|
/*SUPPRESS 530*/
|
/*SUPPRESS 530*/
|
|
|
/* Nonzero if either X or Y is not aligned on a "long" boundary. */
|
/* Nonzero if either X or Y is not aligned on a "long" boundary. */
|
#define UNALIGNED(X, Y) \
|
#define UNALIGNED(X, Y) \
|
(((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1)))
|
(((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1)))
|
|
|
#if LONG_MAX == 2147483647L
|
#if LONG_MAX == 2147483647L
|
#define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
|
#define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
|
#else
|
#else
|
#if LONG_MAX == 9223372036854775807L
|
#if LONG_MAX == 9223372036854775807L
|
/* Nonzero if X (a long int) contains a NULL byte. */
|
/* Nonzero if X (a long int) contains a NULL byte. */
|
#define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080)
|
#define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080)
|
#else
|
#else
|
#error long int is not a 32bit or 64bit type.
|
#error long int is not a 32bit or 64bit type.
|
#endif
|
#endif
|
#endif
|
#endif
|
|
|
#ifndef DETECTNULL
|
#ifndef DETECTNULL
|
#error long int is not a 32bit or 64bit byte
|
#error long int is not a 32bit or 64bit byte
|
#endif
|
#endif
|
|
|
char*
|
char*
|
_DEFUN (strcpy, (dst0, src0),
|
_DEFUN (strcpy, (dst0, src0),
|
char *dst0 _AND
|
char *dst0 _AND
|
_CONST char *src0)
|
_CONST char *src0)
|
{
|
{
|
|
|
#ifndef HAVE_HW_PCMP
|
#ifndef HAVE_HW_PCMP
|
|
|
#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
|
#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
|
char *s = dst0;
|
char *s = dst0;
|
|
|
while (*dst0++ = *src0++)
|
while (*dst0++ = *src0++)
|
;
|
;
|
|
|
return s;
|
return s;
|
#else
|
#else
|
char *dst = dst0;
|
char *dst = dst0;
|
_CONST char *src = src0;
|
_CONST char *src = src0;
|
long *aligned_dst;
|
long *aligned_dst;
|
_CONST long *aligned_src;
|
_CONST long *aligned_src;
|
|
|
/* If SRC or DEST is unaligned, then copy bytes. */
|
/* If SRC or DEST is unaligned, then copy bytes. */
|
if (!UNALIGNED (src, dst))
|
if (!UNALIGNED (src, dst))
|
{
|
{
|
aligned_dst = (long*)dst;
|
aligned_dst = (long*)dst;
|
aligned_src = (long*)src;
|
aligned_src = (long*)src;
|
|
|
/* SRC and DEST are both "long int" aligned, try to do "long int"
|
/* SRC and DEST are both "long int" aligned, try to do "long int"
|
sized copies. */
|
sized copies. */
|
while (!DETECTNULL(*aligned_src))
|
while (!DETECTNULL(*aligned_src))
|
{
|
{
|
*aligned_dst++ = *aligned_src++;
|
*aligned_dst++ = *aligned_src++;
|
}
|
}
|
|
|
dst = (char*)aligned_dst;
|
dst = (char*)aligned_dst;
|
src = (char*)aligned_src;
|
src = (char*)aligned_src;
|
}
|
}
|
|
|
while (*dst++ = *src++)
|
while (*dst++ = *src++)
|
;
|
;
|
return dst0;
|
return dst0;
|
#endif /* not PREFER_SIZE_OVER_SPEED */
|
#endif /* not PREFER_SIZE_OVER_SPEED */
|
|
|
#else
|
#else
|
|
|
asm volatile (" \
|
asm volatile (" \
|
or r9, r0, r0 /* Index register */ \n\
|
or r9, r0, r0 /* Index register */ \n\
|
check_alignment: \n\
|
check_alignment: \n\
|
andi r3, r5, 3 \n\
|
andi r3, r5, 3 \n\
|
andi r4, r6, 3 \n\
|
andi r4, r6, 3 \n\
|
bnei r3, try_align_args \n\
|
bnei r3, try_align_args \n\
|
bnei r4, regular_strcpy /* At this point we dont have a choice */ \n\
|
bnei r4, regular_strcpy /* At this point we dont have a choice */ \n\
|
cpy_loop: \n\
|
cpy_loop: \n\
|
lw r3, r6, r9 \n\
|
lw r3, r6, r9 \n\
|
pcmpbf r4, r0, r3 \n\
|
pcmpbf r4, r0, r3 \n\
|
bnei r4, cpy_bytes /* If r4 != 0, then null present within string */\n\
|
bnei r4, cpy_bytes /* If r4 != 0, then null present within string */\n\
|
sw r3, r5, r9 \n\
|
sw r3, r5, r9 \n\
|
brid cpy_loop \n\
|
brid cpy_loop \n\
|
addik r9, r9, 4 \n\
|
addik r9, r9, 4 \n\
|
cpy_bytes: \n\
|
cpy_bytes: \n\
|
lbu r3, r6, r9 \n\
|
lbu r3, r6, r9 \n\
|
sb r3, r5, r9 \n\
|
sb r3, r5, r9 \n\
|
addik r4, r4, -1 \n\
|
addik r4, r4, -1 \n\
|
bneid r4, cpy_bytes \n\
|
bneid r4, cpy_bytes \n\
|
addik r9, r9, 1 /* delay slot */\n\
|
addik r9, r9, 1 /* delay slot */\n\
|
cpy_null: \n\
|
cpy_null: \n\
|
rtsd r15, 8 \n\
|
rtsd r15, 8 \n\
|
or r3, r0, r5 /* Return strcpy result */\n\
|
or r3, r0, r5 /* Return strcpy result */\n\
|
try_align_args: \n\
|
try_align_args: \n\
|
xor r7, r4, r3 \n\
|
xor r7, r4, r3 \n\
|
bnei r7, regular_strcpy /* cannot align args */\n\
|
bnei r7, regular_strcpy /* cannot align args */\n\
|
rsubik r10, r3, 4 /* Number of initial bytes to align */\n\
|
rsubik r10, r3, 4 /* Number of initial bytes to align */\n\
|
align_loop: \n\
|
align_loop: \n\
|
lbu r3, r6, r9 \n\
|
lbu r3, r6, r9 \n\
|
sb r3, r5, r9 \n\
|
sb r3, r5, r9 \n\
|
beqid r3, end_cpy /* Break if we have seen null character */\n\
|
beqid r3, end_cpy /* Break if we have seen null character */\n\
|
addik r10, r10, -1 \n\
|
addik r10, r10, -1 \n\
|
bneid r10, align_loop \n\
|
bneid r10, align_loop \n\
|
addik r9, r9, 1 \n\
|
addik r9, r9, 1 \n\
|
bri cpy_loop \n\
|
bri cpy_loop \n\
|
regular_strcpy: \n\
|
regular_strcpy: \n\
|
lbu r3, r6, r9 \n\
|
lbu r3, r6, r9 \n\
|
sb r3, r5, r9 \n\
|
sb r3, r5, r9 \n\
|
bneid r3, regular_strcpy \n\
|
bneid r3, regular_strcpy \n\
|
addik r9, r9, 1 \n\
|
addik r9, r9, 1 \n\
|
end_cpy: \n\
|
end_cpy: \n\
|
rtsd r15, 8 \n\
|
rtsd r15, 8 \n\
|
or r3, r0, r5 /* Return strcpy result */");
|
or r3, r0, r5 /* Return strcpy result */");
|
#endif /* ! HAVE_HW_PCMP */
|
#endif /* ! HAVE_HW_PCMP */
|
}
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
