/* ia64-asmtab.h -- Header for compacted IA-64 opcode tables. Copyright 1999, 2000 Free Software Foundation, Inc. Contributed by Bob Manson of Cygnus Support <manson@cygnus.com> This file is part of GDB, GAS, and the GNU binutils. GDB, GAS, and the GNU binutils are free software; you can redistribute them and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GDB, GAS, and the GNU binutils are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this file; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef IA64_ASMTAB_H #define IA64_ASMTAB_H #include "opcode/ia64.h" /* The primary opcode table is made up of the following: */ struct ia64_main_table { /* The entry in the string table that corresponds to the name of this opcode. */ unsigned short name_index; /* The type of opcode; corresponds to the TYPE field in struct ia64_opcode. */ unsigned char opcode_type; /* The number of outputs for this opcode. */ unsigned char num_outputs; /* The base insn value for this opcode. It may be modified by completers. */ ia64_insn opcode; /* The mask of valid bits in OPCODE. Zeros indicate operand fields. */ ia64_insn mask; /* The operands of this instruction. Corresponds to the OPERANDS field in struct ia64_opcode. */ unsigned char operands[5]; /* The flags for this instruction. Corresponds to the FLAGS field in struct ia64_opcode. */ short flags; /* The tree of completers for this instruction; this is an offset into completer_table. */ short completers; }; /* Each instruction has a set of possible "completers", or additional suffixes that can alter the instruction's behavior, and which has potentially different dependencies. The completer entries modify certain bits in the instruction opcode. Which bits are to be modified are marked by the BITS, MASK and OFFSET fields. The completer entry may also note dependencies for the opcode. These completers are arranged in a DAG; the pointers are indexes into the completer_table array. The completer DAG is searched by find_completer () and ia64_find_matching_opcode (). Note that each completer needs to be applied in turn, so that if we have the instruction cmp.lt.unc the completer entries for both "lt" and "unc" would need to be applied to the opcode's value. Some instructions do not require any completers; these contain an empty completer entry. Instructions that require a completer do not contain an empty entry. Terminal completers (those completers that validly complete an instruction) are marked by having the TERMINAL_COMPLETER flag set. Only dependencies listed in the terminal completer for an opcode are considered to apply to that opcode instance. */ struct ia64_completer_table { /* The bit value that this completer sets. */ unsigned int bits; /* And its mask. 1s are bits that are to be modified in the instruction. */ unsigned int mask; /* The entry in the string table that corresponds to the name of this completer. */ unsigned short name_index; /* An alternative completer, or -1 if this is the end of the chain. */ short alternative; /* A pointer to the DAG of completers that can potentially follow this one, or -1. */ short subentries; /* The bit offset in the instruction where BITS and MASK should be applied. */ unsigned char offset : 7; unsigned char terminal_completer : 1; /* Index into the dependency list table */ short dependencies; }; /* This contains sufficient information for the disassembler to resolve the complete name of the original instruction. */ struct ia64_dis_names { /* COMPLETER_INDEX represents the tree of completers that make up the instruction. The LSB represents the top of the tree for the specified instruction. A 0 bit indicates to go to the next alternate completer via the alternative field; a 1 bit indicates that the current completer is part of the instruction, and to go down the subentries index. We know we've reached the final completer when we run out of 1 bits. There is always at least one 1 bit. */ unsigned int completer_index : 20; /* The index in the main_table[] array for the instruction. */ unsigned short insn_index : 11; /* If set, the next entry in this table is an alternate possibility for this instruction encoding. Which one to use is determined by the instruction type and other factors (see opcode_verify ()). */ unsigned int next_flag : 1; /* The disassembly priority of this entry among instructions. */ unsigned short priority; }; #endif