aboutsummaryrefslogtreecommitdiff
path: root/sim/cr16/endian.c
blob: 3cf2f2220dae4d17dbc673d6728a7d7aa7797059 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
/* Simulation code for the CR16 processor.
   Copyright (C) 2008-2015 Free Software Foundation, Inc.
   Contributed by M Ranga Swami Reddy <MR.Swami.Reddy@nsc.com>

   This file is part of GDB, the GNU debugger.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program. If not, see <http://www.gnu.org/licenses/>.  */


/* If we're being compiled as a .c file, rather than being included in
   cr16_sim.h, then ENDIAN_INLINE won't be defined yet.  */

#ifndef ENDIAN_INLINE
#define NO_ENDIAN_INLINE
#include "cr16_sim.h"
#define ENDIAN_INLINE
#endif

ENDIAN_INLINE uint16
get_word (uint8 *x)
{
  return *(uint16 *)x;
}

ENDIAN_INLINE uint32
get_longword (uint8 *x)
{
  return (((uint32) *(uint16 *)x) << 16) | ((uint32) *(uint16 *)(x+2));
}

ENDIAN_INLINE int64
get_longlong (uint8 *x)
{
  uint32 top = get_longword (x);
  uint32 bottom = get_longword (x+4);
  return (((int64)top)<<32) | (int64)bottom;
}

ENDIAN_INLINE void
write_word (uint8 *addr, uint16 data)
{
  addr[1] = (data >> 8) & 0xff;
  addr[0] = data & 0xff;

}

ENDIAN_INLINE void
write_longword (uint8 *addr, uint32 data)
{
  *(uint16 *)(addr + 2) = (uint16)(data >> 16);
  *(uint16 *)(addr) = (uint16)data;
}

ENDIAN_INLINE void
write_longlong (uint8 *addr, int64 data)
{
  write_longword (addr+4, (uint32)(data >> 32));
  write_longword (addr, (uint32)data);
}