New simulator changes from Andrew

[deliverable/binutils-gdb.git] / sim / ppc / ppc-opcode-stupid

diff --git a/sim/ppc/ppc-opcode-stupid b/sim/ppc/ppc-opcode-stupid
index 39795c87baab6e2cbd914efbbbf019963c390664..849379101e1caedc74b9abd2accae602b3fc4cbb 100644 (file)
--- a/sim/ppc/ppc-opcode-stupid
+++ b/sim/ppc/ppc-opcode-stupid
@@ -16,77 +16,6 @@
 #   You should have received a copy of the GNU General Public License
 #   along with this program; if not, write to the Free Software
 #   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-#   Instruction decode:
-#
-#   The table that follows is used by gen to construct a decision tree
-#   that can identify each possible instruction.  Gen then outputs this
-#   decision tree as (according to config) a table or switch statement
-#   as the function idecode.
-#
-#   In parallel to this, as mentioned above, WITH_EXPANDED_SEMANTICS
-#   determines of the semantic functions themselves should be expanded
-#   in a similar way.
-#
-#   The table contains the following entries:
-#
-#   <valid>
-#
-#   Must be 1 for the entry to be considered.  The last entry must be
-#   zero.
-#      
-#   <first>
-#   <last>
-#
-#   Range of bits (within the instruction) that should be searched for
-#   an instruction field.  Within such ranges, gen looks for opcodes
-#   (constants), registers (strings) and reserved bits (slash) and
-#   according to the rules that follows includes or excludes them from
-#   a possible instruction field.
-#
-#   <force_first>
-#   <force_last>
-#
-#   If an instructioin field was found, enlarge the field size so that
-#   it is forced to at least include bits starting from <force_first>
-#   (<force_last>).  To stop this occuring, use <force_first> = <last>
-#   + 1 and <force_last> = <first> - 1.
-#
-#   <force_slash>
-#
-#   Treat `/' fields as a constant instead of variable when looking for
-#   an instruction field.
-#
-#   <force_expansion>
-#
-#   Treat any contained register (string) fields as constant when
-#   determining the instruction field.  For the instruction decode (and
-#   controled by IDECODE_EXPAND_SEMANTICS) this forces the expansion of
-#   what would otherwize be non constant bits of an instruction.
-#
-#   <use_switch>
-#
-#   Should this table be expanded using a switch statement (val 1) and
-#   if so, should it be padded with entries so as to force the compiler
-#   to generate a jump table (val 2).
-#
-#   <special_mask>
-#   <special_value>
-#   <special_rule>
-#
-#   Special rule to fine tune how specific (or groups) of instructions
-#   are expanded.  The applicability of the rule is determined by
-#
-#     <special_mask> != 0 && (instruction> & <special_mask>) == <special_value>
-#
-#   Where <instruction> is obtained by looking only at constant fields
-#   with in an instructions spec.  When determining an expansion, the
-#   rule is only considered when a node contains a single instruction.
-#   <special_rule> can be any of:
-#
-#        0: for this instruction, expand by earlier rules
-#      1: expand bits <force_low> .. <force_hi> only
-#      2: boolean expansion of only zero/non-zero cases
 #
  0: 5: 0: 5:0:0:             0:0x00000000:0x00000000:0
 21:31:32:-1:0:OE,LR,AA,Rc,LK:0:0x00000000:0x00000000:0