Minor fix to decoding extended opcode 30 on PPC

On PPC, the extended opcode of table 30 is decoded based on the following criterion: If bit 27 = 1. Extended opcode is at range 27-30. Otherwise the extended opcode range is 27-29.
dyninst · Nov 2, 2018 · d5f19ec · d5f19ec
1 parent 7a62f5b
commit d5f19ec
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/instructionAPI/src/InstructionDecoder-power.C b/instructionAPI/src/InstructionDecoder-power.C
@@ -829,7 +829,12 @@ using namespace boost::assign;
     }
     const power_entry& InstructionDecoder_power::extended_op_30()
     {
-        const power_table::const_iterator entry_it = power_entry::extended_op_30.find(field<27, 29>(insn));
+
+        power_table::const_iterator entry_it;
+	if (field<27,27>(insn) == 0)
+	   entry_it = power_entry::extended_op_30.find(field<27, 29>(insn));
+	else
+	   entry_it = power_entry::extended_op_30.find(field<27, 30>(insn));
         if (entry_it == power_entry::extended_op_30.end())
             return invalid_entry;
         return entry_it->second;