bcopy.s revision 1.9
1 1.9 martin /* $NetBSD: bcopy.s,v 1.9 2008/04/28 20:23:13 martin Exp $ */ 2 1.3 is 3 1.3 is /*- 4 1.4 is * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 1.1 is * All rights reserved. 6 1.1 is * 7 1.3 is * This code is derived from software contributed to The NetBSD Foundation 8 1.3 is * by Ignatios Souvatzis. 9 1.3 is * 10 1.1 is * Redistribution and use in source and binary forms, with or without 11 1.1 is * modification, are permitted provided that the following conditions 12 1.1 is * are met: 13 1.1 is * 1. Redistributions of source code must retain the above copyright 14 1.1 is * notice, this list of conditions and the following disclaimer. 15 1.1 is * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 is * notice, this list of conditions and the following disclaimer in the 17 1.1 is * documentation and/or other materials provided with the distribution. 18 1.1 is * 19 1.3 is * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3 is * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3 is * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3 is * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3 is * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3 is * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3 is * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3 is * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3 is * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3 is * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3 is * POSSIBILITY OF SUCH DAMAGE. 30 1.3 is */ 31 1.3 is 32 1.3 is /* 33 1.1 is * Small but possibly slow bcopy/memcpy combo. 34 1.1 is */ 35 1.3 is 36 1.5 is #include <machine/asm.h> 37 1.5 is 38 1.1 is .text 39 1.1 is .even 40 1.1 is 41 1.8 is ENTRY_NOPROFILE(memmove) 42 1.5 is ENTRY_NOPROFILE(memcpy) 43 1.6 is movel %sp@(4),%a0 44 1.6 is movel %sp@(8),%a1 45 1.1 is jra Lcpy 46 1.5 is 47 1.5 is ENTRY_NOPROFILE(bcopy) 48 1.6 is movel %sp@(4),%a1 49 1.6 is movel %sp@(8),%a0 50 1.1 is Lcpy: 51 1.6 is movel %sp@(12),%d0 52 1.1 is jeq L1 53 1.7 mhitch cmpl %a1,%a0 54 1.1 is jcc L3 55 1.1 is L4: 56 1.6 is moveb %a1@+,%a0@+ 57 1.6 is subql #1,%d0 58 1.1 is jne L4 59 1.1 is rts 60 1.1 is L3: 61 1.7 mhitch addl %d0,%a1 62 1.7 mhitch addl %d0,%a0 63 1.1 is L9: 64 1.6 is moveb %a1@-,%a0@- 65 1.6 is subql #1,%d0 66 1.1 is jne L9 67 1.1 is L1: 68 1.1 is rts 69
Indexes created Wed Oct 15 16:09:53 GMT 2025