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authorMichael Meissner <gnu@the-meissners.org>1996-07-23 15:42:42 +0000
committerMichael Meissner <gnu@the-meissners.org>1996-07-23 15:42:42 +0000
commit30c87b55ec44de3a56cecf41fc7c93ed0c4005ca (patch)
tree5752ad56a8e4c990eb02b12f68d486415c79c41b /sim/ppc/ppc-opcode-test-2
parent856bcbcbbc01a252a8df2221038100e9a33f87ff (diff)
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New simulator changes from Andrew
Diffstat (limited to 'sim/ppc/ppc-opcode-test-2')
-rw-r--r--sim/ppc/ppc-opcode-test-271
1 files changed, 0 insertions, 71 deletions
diff --git a/sim/ppc/ppc-opcode-test-2 b/sim/ppc/ppc-opcode-test-2
index 1af4beb..a98d0a7 100644
--- a/sim/ppc/ppc-opcode-test-2
+++ b/sim/ppc/ppc-opcode-test-2
@@ -17,77 +17,6 @@
# 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:: 0:0x00000000:0x00000000:0
21:31:32:-1:0:OE,LR,AA,Rc,LK:0:0x00000000:0x00000000:0
6: 9: 6: 9:0:BO: 0:0xfc000000:0x40000000:1