sim/cr16/endian.c

   1 /* Simulation code for the CR16 processor.
   2    Copyright (C) 2008-2015 Free Software Foundation, Inc.
   3    Contributed by M Ranga Swami Reddy <MR.Swami.Reddy@nsc.com>
   4
   5    This file is part of GDB, the GNU debugger.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program. If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 /* If we're being compiled as a .c file, rather than being included in
  22    cr16_sim.h, then ENDIAN_INLINE won't be defined yet.  */
  23
  24 #ifndef ENDIAN_INLINE
  25 #define NO_ENDIAN_INLINE
  26 #include "cr16_sim.h"
  27 #define ENDIAN_INLINE
  28 #endif
  29
  30 ENDIAN_INLINE uint16
  31 get_word (uint8 *x)
  32 {
  33   return *(uint16 *)x;
  34 }
  35
  36 ENDIAN_INLINE uint32
  37 get_longword (uint8 *x)
  38 {
  39   return (((uint32) *(uint16 *)x) << 16) | ((uint32) *(uint16 *)(x+2));
  40 }
  41
  42 ENDIAN_INLINE int64
  43 get_longlong (uint8 *x)
  44 {
  45   uint32 top = get_longword (x);
  46   uint32 bottom = get_longword (x+4);
  47   return (((int64)top)<<32) | (int64)bottom;
  48 }
  49
  50 ENDIAN_INLINE void
  51 write_word (uint8 *addr, uint16 data)
  52 {
  53   addr[1] = (data >> 8) & 0xff;
  54   addr[0] = data & 0xff;
  55
  56 }
  57
  58 ENDIAN_INLINE void
  59 write_longword (uint8 *addr, uint32 data)
  60 {
  61   *(uint16 *)(addr + 2) = (uint16)(data >> 16);
  62   *(uint16 *)(addr) = (uint16)data;
  63 }
  64
  65 ENDIAN_INLINE void
  66 write_longlong (uint8 *addr, int64 data)
  67 {
  68   write_longword (addr+4, (uint32)(data >> 32));
  69   write_longword (addr, (uint32)data);
  70 }