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      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