endian_machdep.h revision 1.3
1 /* $NetBSD: endian_machdep.h,v 1.3 2013/05/23 21:39:49 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #ifndef _BYTE_ORDER 29 # error Define MIPS target CPU endian-ness in port-specific header file. 30 #endif 31 32 #ifdef _LOCORE 33 34 /* 35 * Endian-independent assembly-code aliases for unaligned memory accesses. 36 */ 37 #if _BYTE_ORDER == _LITTLE_ENDIAN 38 # define LWHI lwr 39 # define LWLO lwl 40 # define SWHI swr 41 # define SWLO swl 42 # if SZREG == 4 43 # define REG_LHI lwr 44 # define REG_LLO lwl 45 # define REG_SHI swr 46 # define REG_SLO swl 47 # else 48 # define REG_LHI ldr 49 # define REG_LLO ldl 50 # define REG_SHI sdr 51 # define REG_SLO sdl 52 # endif 53 #endif 54 55 #if _BYTE_ORDER == _BIG_ENDIAN 56 # define LWHI lwl 57 # define LWLO lwr 58 # define SWHI swl 59 # define SWLO swr 60 # if SZREG == 4 61 # define REG_LHI lwl 62 # define REG_LLO lwr 63 # define REG_SHI swl 64 # define REG_SLO swr 65 # else 66 # define REG_LHI ldl 67 # define REG_LLO ldr 68 # define REG_SHI sdl 69 # define REG_SLO sdr 70 # endif 71 #endif 72 73 #endif /* LOCORE */ 74
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