sim/arm/maverick.h

   1 /*  maverick.h -- Cirrus/DSP co-processor interface header
   2     Copyright (C) 2003-2024 Free Software Foundation, Inc.
   3     Contributed by Aldy Hernandez (aldyh@redhat.com).
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>. */
  17
  18 /* Define Co-Processor instruction handlers here.  */
  19
  20 /* Here's ARMulator's DSP definition.  A few things to note:
  21    1) it has 16 64-bit registers and 4 72-bit accumulators
  22    2) you can only access its registers with MCR and MRC.  */
  23
  24 struct maverick_regs
  25 {
  26   union
  27   {
  28     int i;
  29     float f;
  30   } upper;
  31
  32   union
  33   {
  34     int i;
  35     float f;
  36   } lower;
  37 };
  38
  39 union maverick_acc_regs
  40 {
  41   long double ld;               /* Acc registers are 72-bits.  */
  42 };
  43
  44 extern struct maverick_regs DSPregs[16];
  45 extern union maverick_acc_regs DSPacc[4];
  46 extern ARMword DSPsc;