Home | History | Annotate | Line # | Download | only in common 
      1 /* The common simulator framework for GDB, the GNU Debugger.
      2 
      3    Copyright 2002-2024 Free Software Foundation, Inc.
      4 
      5    Contributed by Andrew Cagney and Red Hat.
      6 
      7    This file is part of GDB.
      8 
      9    This program is free software; you can redistribute it and/or modify
     10    it under the terms of the GNU General Public License as published by
     11    the Free Software Foundation; either version 3 of the License, or
     12    (at your option) any later version.
     13 
     14    This program is distributed in the hope that it will be useful,
     15    but WITHOUT ANY WARRANTY; without even the implied warranty of
     16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     17    GNU General Public License for more details.
     18 
     19    You should have received a copy of the GNU General Public License
     20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     21 
     22 
     23 #ifndef _SIM_ENDIAN_C_
     24 #define _SIM_ENDIAN_C_
     25 
     26 /* This must come before any other includes.  */
     27 #include "defs.h"
     28 
     29 #include "bfd.h"
     30 
     31 #include "sim-basics.h"
     32 #include "sim-assert.h"
     33 
     34 
     35 #if !defined(_SWAP_1)
     36 #define _SWAP_1(SET,RAW) SET (RAW)
     37 #endif
     38 
     39 #if !defined(_SWAP_2) && (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE) && defined(htons)
     40 #define _SWAP_2(SET,RAW) SET htons (RAW)
     41 #endif
     42 
     43 #ifndef	_SWAP_2
     44 #define _SWAP_2(SET,RAW) SET (((RAW) >> 8) | ((RAW) << 8))
     45 #endif
     46 
     47 #if !defined(_SWAP_4) && (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE) && defined(htonl)
     48 #define _SWAP_4(SET,RAW) SET htonl (RAW)
     49 #endif
     50 
     51 #ifndef _SWAP_4
     52 #define	_SWAP_4(SET,RAW) SET (((RAW) << 24) | (((RAW) & 0xff00) << 8) | (((RAW) & 0xff0000) >> 8) | ((RAW) >> 24))
     53 #endif
     54 
     55 #ifndef _SWAP_8
     56 #define _SWAP_8(SET,RAW) \
     57   union { unsigned_8 dword; unsigned_4 words[2]; } in, out; \
     58   in.dword = RAW; \
     59   _SWAP_4 (out.words[0] =, in.words[1]); \
     60   _SWAP_4 (out.words[1] =, in.words[0]); \
     61   SET out.dword;
     62 #endif
     63 
     64 #ifndef _SWAP_16
     65 #define _SWAP_16(SET,RAW) \
     66   union { unsigned_16 word; unsigned_4 words[4]; } in, out; \
     67   in.word = (RAW); \
     68   _SWAP_4 (out.words[0] =, in.words[3]); \
     69   _SWAP_4 (out.words[1] =, in.words[2]); \
     70   _SWAP_4 (out.words[2] =, in.words[1]); \
     71   _SWAP_4 (out.words[3] =, in.words[0]); \
     72   SET out.word;
     73 #endif
     74 
     75 
     76 #define N 1
     77 #include "sim-n-endian.h"
     78 #undef N
     79 
     80 #define N 2
     81 #include "sim-n-endian.h"
     82 #undef N
     83 
     84 #define N 4
     85 #include "sim-n-endian.h"
     86 #undef N
     87 
     88 #define N 8
     89 #include "sim-n-endian.h"
     90 #undef N
     91 
     92 #define N 16
     93 #include "sim-n-endian.h"
     94 #undef N
     95 
     96 
     97 INLINE_SIM_ENDIAN\
     98 (unsigned_8)
     99 sim_endian_split_16 (unsigned_16 word, int w)
    100 {
    101   if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
    102     {
    103       return word.a[1 - w];
    104     }
    105   else
    106     {
    107       return word.a[w];
    108     }
    109 }
    110 
    111 
    112 INLINE_SIM_ENDIAN\
    113 (unsigned_16)
    114 sim_endian_join_16 (unsigned_8 h, unsigned_8 l)
    115 
    116 {
    117   unsigned_16 word;
    118   if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
    119     {
    120       word.a[0] = l;
    121       word.a[1] = h;
    122     }
    123   else
    124     {
    125       word.a[0] = h;
    126       word.a[1] = l;
    127     }
    128   return word;
    129 }
    130 
    131 
    132 
    133 #endif /* _SIM_ENDIAN_C_ */
    134