sim/ppc/ppc-cache-rules

   1 #
   2 #   This file is part of the program psim.
   3 #
   4 #   Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
   5 #
   6 #   This program is free software; you can redistribute it and/or modify
   7 #   it under the terms of the GNU General Public License as published by
   8 #   the Free Software Foundation; either version 2 of the License, or
   9 #   (at your option) any later version.
  10 #
  11 #   This program is distributed in the hope that it will be useful,
  12 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 #   GNU General Public License for more details.
  15 #
  16 #   You should have received a copy of the GNU General Public License
  17 #   along with this program; if not, write to the Free Software
  18 #   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19 #
  20 #
  21 # Instruction unpacking:
  22 #
  23 #   Once the instruction has been decoded, the register (and other)
  24 #   fields within the instruction need to be extracted.
  25 #
  26 #   The table that follows determines how each field should be treated.
  27 #   Importantly it considers the case where the extracted field is to
  28 #   be used immediatly or stored in an instruction cache.
  29 #
  30 #   <valid>
  31 #
  32 #   Zero marks the end of the table.  More importantly 1. indicates
  33 #   that the entry is valid and can be cached. 2. indicates that that
  34 #   the entry is valid but can not be cached.
  35 #
  36 #   <old_name>
  37 #
  38 #   The field name as given in the instruction spec.
  39 #
  40 #   <new_name>
  41 #
  42 #   A name for <old_name> once it has been extracted from the
  43 #   instructioin (and possibly stored in the instruction cache).
  44 #
  45 #   <type>
  46 #
  47 #   String specifying the storage type for <new_name> (the extracted
  48 #   field>.
  49 #
  50 #   <expression>
  51 #
  52 #   Specifies how to get <new_name> from <old_name>.  If null, old and
  53 #   new name had better be the same. */
  54 #
  55 #
  56 1:RA:RA::
  57 1:RA:rA:signed_word *:(cpu_registers(processor)->gpr + RA)
  58 1:RT:RT::
  59 1:RT:rT:signed_word *:(cpu_registers(processor)->gpr + RT)
  60 2:RS:RS::
  61 1:RS:rS:signed_word *:(cpu_registers(processor)->gpr + RS)
  62 2:RB:RB::
  63 1:RB:rB:signed_word *:(cpu_registers(processor)->gpr + RB)
  64 2:FRA:FRA::
  65 1:FRA:frA:unsigned64 *:(cpu_registers(processor)->fpr + FRA)
  66 2:FRB:FRB::
  67 1:FRB:frB:unsigned64 *:(cpu_registers(processor)->fpr + FRB)
  68 2:FRC:FRC::
  69 1:FRC:frC:unsigned64 *:(cpu_registers(processor)->fpr + FRC)
  70 2:FRS:FRS::
  71 1:FRS:frS:unsigned64 *:(cpu_registers(processor)->fpr + FRS)
  72 2:FRT:FRT::
  73 1:FRT:frT:unsigned64 *:(cpu_registers(processor)->fpr + FRT)
  74 1:SI:EXTS_SI:unsigned_word:((signed_word)(signed16)instruction)
  75 2:BI:BI::
  76 1:BI:BIT32_BI::BIT32(BI)
  77 2:BA:BA::
  78 1:BA:BIT32_BA::BIT32(BA)
  79 2:BB:BB::
  80 1:BB:BIT32_BB::BIT32(BB)
  81 1:BD:EXTS_BD_0b00:unsigned_word:(((signed_word)(signed16)instruction) & ~3)
  82 #1:BD:CIA_plus_EXTS_BD_0b00:unsigned_word:CIA + EXTS(BD_0b00)
  83 1:LI:EXTS_LI_0b00:unsigned_word:((((signed_word)(signed32)(instruction << 6)) >> 6) & ~0x3)
  84 1:D:EXTS_D:unsigned_word:((signed_word)(signed16)(instruction))
  85 1:DS:EXTS_DS_0b00:unsigned_word:(((signed_word)(signed16)instruction) & ~0x3)