2013-07-09 Sabrina Ni <sabrina@andestech.com>
* libc/machine/nds32/Makefile.am (lib_a_SOURCES): Add abort.c, memcpy.S,
memset.S, strcmp.S, and strcpy.S.
* libc/machine/nds32/Makefile.in: Regenerated.
* libc/machine/nds32/{abort.c, memcpy.S, memset.S, strcmp.S, strcpy.S}: New.
This commit is contained in:
Jeff Johnston
parent
bdf683b1c8
commit
f9a17f68c4
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@ -1,3 +1,11 @@
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2013-07-09 Sabrina Ni <sabrina@andestech.com>
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* libc/machine/nds32/Makefile.am (lib_a_SOURCES): Add abort.c, memcpy.S,
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memset.S, strcmp.S, and strcpy.S.
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* libc/machine/nds32/Makefile.in: Regenerated.
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* libc/machine/nds32/{abort.c, memcpy.S, memset.S, strcmp.S, strcpy.S}:
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New.
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2013-07-09 Sabrina Ni <sabrina@andestech.com>
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* configure.host (machine_dir, syscall_dir, newlib_cflags):
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@ -8,7 +8,7 @@ AM_CCASFLAGS = $(INCLUDES)
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noinst_LIBRARIES = lib.a
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lib_a_SOURCES = setjmp.S
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lib_a_SOURCES = abort.c memcpy.S memset.S setjmp.S strcmp.S strcpy.S
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lib_a_CCASFLAGS=$(AM_CCASFLAGS)
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lib_a_CFLAGS = $(AM_CFLAGS)
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@ -69,7 +69,9 @@ LIBRARIES = $(noinst_LIBRARIES)
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ARFLAGS = cru
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lib_a_AR = $(AR) $(ARFLAGS)
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lib_a_LIBADD =
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am_lib_a_OBJECTS = lib_a-setjmp.$(OBJEXT)
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am_lib_a_OBJECTS = lib_a-abort.$(OBJEXT) lib_a-memcpy.$(OBJEXT) \
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lib_a-memset.$(OBJEXT) lib_a-setjmp.$(OBJEXT) \
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lib_a-strcmp.$(OBJEXT) lib_a-strcpy.$(OBJEXT)
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lib_a_OBJECTS = $(am_lib_a_OBJECTS)
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DEFAULT_INCLUDES = -I.@am__isrc@
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depcomp =
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@ -195,7 +197,7 @@ AUTOMAKE_OPTIONS = cygnus
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INCLUDES = $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)
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AM_CCASFLAGS = $(INCLUDES)
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noinst_LIBRARIES = lib.a
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lib_a_SOURCES = setjmp.S
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lib_a_SOURCES = abort.c memcpy.S memset.S setjmp.S strcmp.S strcpy.S
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lib_a_CCASFLAGS = $(AM_CCASFLAGS)
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lib_a_CFLAGS = $(AM_CFLAGS)
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ACLOCAL_AMFLAGS = -I ../../.. -I ../../../..
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@ -203,7 +205,7 @@ CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
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all: all-am
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.SUFFIXES:
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.SUFFIXES: .S .o .obj
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.SUFFIXES: .S .c .o .obj
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am--refresh: Makefile
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@:
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$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(am__configure_deps)
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@ -258,12 +260,48 @@ distclean-compile:
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.S.obj:
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$(CPPASCOMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
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lib_a-memcpy.o: memcpy.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-memcpy.o `test -f 'memcpy.S' || echo '$(srcdir)/'`memcpy.S
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lib_a-memcpy.obj: memcpy.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-memcpy.obj `if test -f 'memcpy.S'; then $(CYGPATH_W) 'memcpy.S'; else $(CYGPATH_W) '$(srcdir)/memcpy.S'; fi`
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lib_a-memset.o: memset.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-memset.o `test -f 'memset.S' || echo '$(srcdir)/'`memset.S
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lib_a-memset.obj: memset.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-memset.obj `if test -f 'memset.S'; then $(CYGPATH_W) 'memset.S'; else $(CYGPATH_W) '$(srcdir)/memset.S'; fi`
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lib_a-setjmp.o: setjmp.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-setjmp.o `test -f 'setjmp.S' || echo '$(srcdir)/'`setjmp.S
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lib_a-setjmp.obj: setjmp.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-setjmp.obj `if test -f 'setjmp.S'; then $(CYGPATH_W) 'setjmp.S'; else $(CYGPATH_W) '$(srcdir)/setjmp.S'; fi`
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lib_a-strcmp.o: strcmp.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-strcmp.o `test -f 'strcmp.S' || echo '$(srcdir)/'`strcmp.S
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lib_a-strcmp.obj: strcmp.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-strcmp.obj `if test -f 'strcmp.S'; then $(CYGPATH_W) 'strcmp.S'; else $(CYGPATH_W) '$(srcdir)/strcmp.S'; fi`
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lib_a-strcpy.o: strcpy.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-strcpy.o `test -f 'strcpy.S' || echo '$(srcdir)/'`strcpy.S
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lib_a-strcpy.obj: strcpy.S
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$(CCAS) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CCASFLAGS) $(CCASFLAGS) -c -o lib_a-strcpy.obj `if test -f 'strcpy.S'; then $(CYGPATH_W) 'strcpy.S'; else $(CYGPATH_W) '$(srcdir)/strcpy.S'; fi`
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.c.o:
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$(COMPILE) -c $<
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.c.obj:
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$(COMPILE) -c `$(CYGPATH_W) '$<'`
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lib_a-abort.o: abort.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-abort.o `test -f 'abort.c' || echo '$(srcdir)/'`abort.c
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lib_a-abort.obj: abort.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-abort.obj `if test -f 'abort.c'; then $(CYGPATH_W) 'abort.c'; else $(CYGPATH_W) '$(srcdir)/abort.c'; fi`
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ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
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list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
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unique=`for i in $$list; do \
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@ -0,0 +1,42 @@
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/*
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FUNCTION
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<<abort>>---abnormal termination of a program
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INDEX
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abort
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ANSI_SYNOPSIS
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#include <stdlib.h>
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void abort(void);
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TRAD_SYNOPSIS
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#include <stdlib.h>
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void abort();
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DESCRIPTION
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Use <<abort>> to signal that your program has detected a condition it
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cannot deal with. Normally, <<abort>> ends your program's execution.
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In general implementation, <<abort>> raises the exception <<SIGABRT>>.
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But for nds32 target, currently it is not necessary for MCU platform.
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We can just call <<_exit>> to terminate program.
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RETURNS
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<<abort>> does not return to its caller.
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PORTABILITY
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ANSI C requires <<abort>>.
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Supporting OS subroutines required: <<_exit>>.
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*/
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#include <unistd.h>
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_VOID
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_DEFUN_VOID (abort)
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{
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while (1)
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{
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_exit (1);
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}
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}
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@ -0,0 +1,77 @@
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/*
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Copyright (c) 2013 Andes Technology Corporation.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
|
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modification, are permitted provided that the following conditions are met:
|
||||
|
||||
Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
|
||||
Redistributions in binary form must reproduce the above copyright
|
||||
notice, this list of conditions and the following disclaimer in the
|
||||
documentation and/or other materials provided with the distribution.
|
||||
|
||||
The name of the company may not be used to endorse or promote
|
||||
products derived from this software without specific prior written
|
||||
permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
|
||||
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
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|
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Function:
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memcpy - copy memory regions
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Syntax:
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void *memcpy(void *s1, const void *s2, size_t n);
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Description:
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The memcpy function copies n characters from the object pointed to
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by s2 into the object pointed to by s1. If copying takes place
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between objects that overlap, the behavior is undefined.
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Return value:
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The memcpy function returns the value of s1.
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*/
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.text
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.align 2
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.globl memcpy
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.type memcpy, @function
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memcpy:
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/* Corner cases. If *s1 equals *s2
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or size_t is zero, just go return. */
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beq $r0, $r1, .Lend_memcpy
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beqz $r2, .Lend_memcpy
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/* Keep *s1 as return value.
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Set $r3 as how many words to copy.
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Set $r2 as how many bytes are less than a word. */
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move $r5, $r0
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srli $r3, $r2, 2
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andi $r2, $r2, 3
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beqz $r3, .Lbyte_copy
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.Lword_copy:
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/* Do the word copy $r3 times. Then, do the byte copy $r2 times. */
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lmw.bim $r4, [$r1], $r4, 0
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addi $r3, $r3, -1
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smw.bim $r4, [$r5], $r4, 0
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bnez $r3, .Lword_copy /* Loop again ? */
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beqz $r2, .Lend_memcpy /* Fall THRU or go return ? */
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.Lbyte_copy:
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/* Do the byte copy $r2 times. */
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lbi.bi $r4, [$r1], 1
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addi $r2, $r2, -1
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sbi.bi $r4, [$r5], 1
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bnez $r2, .Lbyte_copy /* Loop again ? */
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.Lend_memcpy:
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ret
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.size memcpy, .-memcpy
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@ -0,0 +1,80 @@
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/*
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Copyright (c) 2013 Andes Technology Corporation.
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All rights reserved.
|
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|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
|
||||
Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
|
||||
Redistributions in binary form must reproduce the above copyright
|
||||
notice, this list of conditions and the following disclaimer in the
|
||||
documentation and/or other materials provided with the distribution.
|
||||
|
||||
The name of the company may not be used to endorse or promote
|
||||
products derived from this software without specific prior written
|
||||
permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
|
||||
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
|
||||
Function:
|
||||
memset - fill memory with a constant byte
|
||||
Syntax:
|
||||
void *memset(void *s, int c, size_t n);
|
||||
Description:
|
||||
The memset function copies the value of c (converted to an unsigned char)
|
||||
into each of the first n characters of the object pointed to by s.
|
||||
Return value:
|
||||
The memset function returns the value of s.
|
||||
*/
|
||||
.text
|
||||
.align 2
|
||||
.globl memset
|
||||
.type memset, @function
|
||||
memset:
|
||||
/* Corner case. If n is zero, just go return. */
|
||||
beqz $r2, .Lend_memset
|
||||
|
||||
/* Keep $r0 as return value.
|
||||
Set $r4 as how many words to copy.
|
||||
Set $r2 as how many bytes are less than a word. */
|
||||
move $r5, $r0
|
||||
srli $r4, $r2, 2
|
||||
andi $r2, $r2, 3
|
||||
beqz $r4, .Lbyte_set
|
||||
|
||||
/* Set $r1 a word-size pattern composed of the value of c
|
||||
(converted to an unsigned char). Convert ??????ab to abababab. */
|
||||
andi $r1, $r1, 0xff /* Set $r1 = 000000ab. */
|
||||
slli $r3, $r1, 8 /* Set $r3 = 0000ab00. */
|
||||
or $r1, $r1, $r3 /* Set $r1 = 0000abab. */
|
||||
slli $r3, $r1, 16 /* Set $r3 = abab0000. */
|
||||
or $r1, $r1, $r3 /* Set $r1 = abababab. */
|
||||
|
||||
.Lword_set:
|
||||
/* Do the word set $r4 times. Then, do the byte set $r2 times. */
|
||||
addi $r4, $r4, -1
|
||||
smw.bim $r1, [$r5], $r1 /* Set a word-size. */
|
||||
bnez $r4, .Lword_set /* Loop again ? */
|
||||
beqz $r2, .Lend_memset /* Fall THRU or go return ? */
|
||||
|
||||
.Lbyte_set:
|
||||
/* Do the byte set $r2 times. */
|
||||
addi $r2, $r2, -1
|
||||
sbi.p $r1, [$r5], 1 /* Set a byte-size. */
|
||||
bnez $r2, .Lbyte_set /* Loop again ? */
|
||||
|
||||
.Lend_memset:
|
||||
ret
|
||||
.size memset, .-memset
|
||||
|
|
@ -0,0 +1,96 @@
|
|||
/*
|
||||
Copyright (c) 2013 Andes Technology Corporation.
|
||||
All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
|
||||
Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
|
||||
Redistributions in binary form must reproduce the above copyright
|
||||
notice, this list of conditions and the following disclaimer in the
|
||||
documentation and/or other materials provided with the distribution.
|
||||
|
||||
The name of the company may not be used to endorse or promote
|
||||
products derived from this software without specific prior written
|
||||
permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
|
||||
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
|
||||
Function:
|
||||
strcmp - compare two strings.
|
||||
Syntax:
|
||||
int strcmp(const char *s1, const char *s2);
|
||||
Description:
|
||||
This function compares the two strings s1 and s2. It returns an
|
||||
integer less than, equal to, or greater than zero if s1 is found,
|
||||
respectively, to be less than, to match, or be greater than s2.
|
||||
Return value:
|
||||
strcmp returns an integer less than, equal to, or greater than
|
||||
zero if s1 (or the first n bytes thereof) is found, respectively,
|
||||
to be less than, to match, or be greater than s2.
|
||||
*/
|
||||
.text
|
||||
.align 2
|
||||
.globl strcmp
|
||||
.type strcmp, @function
|
||||
strcmp:
|
||||
/* If s1 or s2 are unaligned, then compare bytes. */
|
||||
or $r5, $r1, $r0
|
||||
andi $r5, $r5, #3
|
||||
bnez $r5, .Lbyte_mode
|
||||
|
||||
/* If s1 and s2 are word-aligned, compare them a word at a time. */
|
||||
lwi $r5, [$r0+(0)]
|
||||
lwi $r3, [$r1+(0)]
|
||||
bne $r5, $r3, .Lbyte_mode /* A difference was detected, so
|
||||
search bytewise. */
|
||||
|
||||
/* It's more efficient to set bit mask outside the word_mode loop. */
|
||||
sethi $r4, hi20(0xFEFEFEFF) /* Set $r4 as -0x01010101. */
|
||||
ori $r4, $r4, lo12(0xFEFEFEFF)
|
||||
sethi $r2, hi20(0x80808080)
|
||||
ori $r2, $r2, lo12(0x80808080)
|
||||
b .Ldetect_null
|
||||
|
||||
.align 2
|
||||
.Lword_mode:
|
||||
lmw.aim $r5, [$r0], $r5
|
||||
lmw.aim $r3, [$r1], $r3
|
||||
bne $r5, $r3, .Lbyte_mode
|
||||
|
||||
.Ldetect_null:
|
||||
/* #define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
|
||||
DETECTNULL returns nonzero if (long)X contains a NULL byte. */
|
||||
nor $r3, $r5, $r5 /* r3 = ~(X) */
|
||||
add $r5, $r5, $r4 /* r2 = ((X) - 0x01010101) */
|
||||
and $r5, $r5, $r3 /* r2 = ~(X) & ((X) - 0x01010101) */
|
||||
and $r5, $r5, $r2 /* r2= r2 & 0x80808080 */
|
||||
beqz $r5, .Lword_mode /* No NULL byte, compare next word. */
|
||||
|
||||
/* To get here, *a1 == *a2, thus if we find a null in *a1,
|
||||
then the strings must be equal, so return zero. */
|
||||
movi $r0, #0
|
||||
ret
|
||||
|
||||
.Lbyte_mode:
|
||||
/* Byte-mode compare. */
|
||||
lbi.bi $r5, [$r0], #1
|
||||
lbi.bi $r3, [$r1], #1
|
||||
bne $r5, $r3, 1f /* Mismatch, done. */
|
||||
bnez $r5, .Lbyte_mode
|
||||
1:
|
||||
sub $r0, $r5, $r3
|
||||
ret
|
||||
.size strcmp, .-strcmp
|
||||
|
|
@ -0,0 +1,76 @@
|
|||
/*
|
||||
Copyright (c) 2013 Andes Technology Corporation.
|
||||
All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are met:
|
||||
|
||||
Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
|
||||
Redistributions in binary form must reproduce the above copyright
|
||||
notice, this list of conditions and the following disclaimer in the
|
||||
documentation and/or other materials provided with the distribution.
|
||||
|
||||
The name of the company may not be used to endorse or promote
|
||||
products derived from this software without specific prior written
|
||||
permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
|
||||
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||||
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||||
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||||
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
|
||||
Function:
|
||||
strcpy - copy a string.
|
||||
Syntax:
|
||||
char *strcpy(char *dest, const char *src);
|
||||
Description:
|
||||
This function copies the string pointed to by src into the array
|
||||
point to by dest (include the teminating null character).
|
||||
Return value:
|
||||
strcpy returns the dest as given.
|
||||
*/
|
||||
.text
|
||||
.align 2
|
||||
.globl strcpy
|
||||
.type strcpy, @function
|
||||
strcpy:
|
||||
move $r3, $r0 /* Keep r0 as reture value. */
|
||||
/* If SRC or DEST is unaligned, then copy bytes. */
|
||||
or $r2, $r1, $r0
|
||||
andi $r2, $r2, #3
|
||||
bnez $r2, .Lbyte_mode
|
||||
|
||||
.Lword_mode:
|
||||
/* SRC and DEST are both "long int" aligned, try to do "long int"
|
||||
sized copies. */
|
||||
/* #define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
|
||||
DETECTNULL returns nonzero if (long)X contains a NULL byte. */
|
||||
lwi $r2, [$r1+(0)] /* r2 is X */
|
||||
sethi $r4, hi20(0xFEFEFEFF)
|
||||
ori $r4, $r4, lo12(0xFEFEFEFF)
|
||||
add $r4, $r2, $r4 /* r4 = ((X) - 0x01010101) */
|
||||
nor $r5, $r2, $r2 /* r5 = ~(X) */
|
||||
and $r4, $r5, $r4 /* r4 = ~(X) & ((X) - 0x01010101) */
|
||||
sethi $r5, hi20(0x80808080)
|
||||
ori $r5, $r5, lo12(0x80808080)
|
||||
and $r4, $r4, $r5 /* r4 = r4 & 0x80808080 */
|
||||
bnez $r4, .Lbyte_mode /* Contains a NULL byte. */
|
||||
swi.bi $r2, [$r3], #4
|
||||
addi $r1, $r1, #4
|
||||
b .Lword_mode
|
||||
|
||||
.Lbyte_mode:
|
||||
lbi.bi $r4, [$r1], #1 /* r4 <- *src++ */
|
||||
sbi.bi $r4, [$r3], #1 /* r4 -> *dest++ */
|
||||
bnez $r4, .Lbyte_mode
|
||||
ret
|
||||
.size strcpy, .-strcpy
|
||||
Loading…
Reference in New Issue