1/* Copyright (c) 2002, 2005, 2006, 2007 Marek Michalkiewicz 2 All rights reserved. 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions are met: 6 7 * Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 * Redistributions in binary form must reproduce the above copyright 10 notice, this list of conditions and the following disclaimer in 11 the documentation and/or other materials provided with the 12 distribution. 13 * Neither the name of the copyright holders nor the names of 14 contributors may be used to endorse or promote products derived 15 from this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 POSSIBILITY OF SUCH DAMAGE. */ 28 29/* $Id: memcpy_P.S 2503 2016-02-07 22:59:47Z joerg_wunsch $ */ 30 31 32 33#if !defined(__AVR_TINY__) 34 35#if !defined(__DOXYGEN__) 36 37#include "macros.inc" 38 39#define dest_hi r25 40#define dest_lo r24 41#define src_hi r23 42#define src_lo r22 43#define len_hi r21 44#define len_lo r20 45 46 ASSEMBLY_CLIB_SECTION 47 .global _U(memcpy_P) 48 .type _U(memcpy_P), @function 49_U(memcpy_P): 50 X_movw ZL, src_lo 51 X_movw XL, dest_lo 52#if OPTIMIZE_SPEED 53; 17 words, (14 + len * 9 - (len & 1)) cycles 54 sbrs len_lo, 0 55 rjmp .L_memcpy_P_start 56 rjmp .L_memcpy_P_odd 57.L_memcpy_P_loop: 58 X_lpm r0, Z+ 59 st X+, r0 60.L_memcpy_P_odd: 61 X_lpm r0, Z+ 62 st X+, r0 63.L_memcpy_P_start: 64 subi len_lo, lo8(2) 65 sbci len_hi, hi8(2) 66#else 67; 12 words, (13 + len * 11) cycles 68 rjmp .L_memcpy_P_start 69.L_memcpy_P_loop: 70 X_lpm r0, Z+ 71 st X+, r0 72.L_memcpy_P_start: 73 subi len_lo, lo8(1) 74 sbci len_hi, hi8(1) 75#endif 76 brcc .L_memcpy_P_loop 77; return dest (unchanged) 78 ret 79.L_memcpy_P_end: 80 .size _U(memcpy_P), .L_memcpy_P_end - _U(memcpy_P) 81 82#endif /* not __DOXYGEN__ */ 83 84#endif /* !defined(__AVR_TINY__) */ 85