/* Copyright (c) 2002, 2007 Marek Michalkiewicz 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. * Neither the name of the copyright holders nor the names of contributors may 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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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. */ /* $Id$ */ #if !defined(__DOXYGEN__) #include "asmdef.h" #define dest_hi r25 #define dest_lo r24 #define src_hi r23 #define src_lo r22 #define val_lo r20 #define len_hi r19 #define len_lo r18 #define ret_hi r25 #define ret_lo r24 #if defined(Lprogmem) && !defined(__AVR_TINY__) # define memccpy memccpy_P # define LOAD X_lpm #else # define LOAD ld #endif ENTRY memccpy X_movw ZL, src_lo X_movw XL, dest_lo .L_memccpy_loop: subi len_lo, lo8(1) sbci len_hi, hi8(1) brcs .L_memccpy_notfound LOAD __tmp_reg__, Z+ st X+, __tmp_reg__ cp __tmp_reg__, val_lo brne .L_memccpy_loop X_movw ret_lo, XL ret .L_memccpy_notfound: clr ret_lo clr ret_hi ret ENDFUNC #endif /* not __DOXYGEN__ */