/* mmix.h -- Header file for MMIX opcode table Copyright (C) 2001, 2003 Free Software Foundation, Inc. Written by Hans-Peter Nilsson (hp@bitrange.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. */ /* We could have just a char*[] table indexed by the register number, but that would not allow for synonyms. The table is terminated with an entry with a NULL name. */ struct mmix_spec_reg { const char *name; unsigned int number; }; /* General indication of the type of instruction. */ enum mmix_insn_type { mmix_type_pseudo, mmix_type_normal, mmix_type_branch, mmix_type_condbranch, mmix_type_memaccess_octa, mmix_type_memaccess_tetra, mmix_type_memaccess_wyde, mmix_type_memaccess_byte, mmix_type_memaccess_block, mmix_type_jsr }; /* Type of operands an instruction takes. Use when parsing assembly code and disassembling. */ enum mmix_operands_type { mmix_operands_none = 0, /* All operands are registers: "$X,$Y,$Z". */ mmix_operands_regs, /* "$X,YZ", like SETH. */ mmix_operands_reg_yz, /* The regular "$X,$Y,$Z|Z". The Z is optional; if only "$X,$Y" is given, then "$X,$Y,0" is assumed. */ mmix_operands_regs_z_opt, /* The regular "$X,$Y,$Z|Z". */ mmix_operands_regs_z, /* "Address"; only JMP. Zero operands allowed unless GNU syntax. */ mmix_operands_jmp, /* "$X|X,$Y,$Z|Z": PUSHGO; like "3", but X can be expressed as an integer. */ mmix_operands_pushgo, /* Two registers or a register and a byte, like FLOT, possibly with rounding: "$X,$Z|Z" or "$X,ROUND_MODE,$Z|Z". */ mmix_operands_roundregs_z, /* "X,YZ", POP. Unless GNU syntax, zero or one operand is allowed. */ mmix_operands_pop, /* Two registers, possibly with rounding: "$X,$Z" or "$X,ROUND_MODE,$Z". */ mmix_operands_roundregs, /* "XYZ", like SYNC. */ mmix_operands_sync, /* "X,$Y,$Z|Z", like SYNCD. */ mmix_operands_x_regs_z, /* "$X,Y,$Z|Z", like NEG and NEGU. The Y field is optional, default 0. */ mmix_operands_neg, /* "$X,Address, like GETA or branches. */ mmix_operands_regaddr, /* "$X|X,Address, like PUSHJ. */ mmix_operands_pushj, /* "$X,spec_reg"; GET. */ mmix_operands_get, /* "spec_reg,$Z|Z"; PUT. */ mmix_operands_put, /* Two registers, "$X,$Y". */ mmix_operands_set, /* "$X,0"; SAVE. */ mmix_operands_save, /* "0,$Z"; UNSAVE. */ mmix_operands_unsave, /* "X,Y,Z"; like SWYM or TRAP. Zero (or 1 if GNU syntax) to three operands, interpreted as 0; XYZ; X, YZ and X, Y, Z. */ mmix_operands_xyz_opt, /* Just "Z", like RESUME. Unless GNU syntax, the operand can be omitted and will then be assumed zero. */ mmix_operands_resume, /* These are specials to handle that pseudo-directives are specified like ordinary insns when being mmixal-compatible. They signify the specific pseudo-directive rather than the operands type. */ /* LOC. */ mmix_operands_loc, /* PREFIX. */ mmix_operands_prefix, /* BYTE. */ mmix_operands_byte, /* WYDE. */ mmix_operands_wyde, /* TETRA. */ mmix_operands_tetra, /* OCTA. */ mmix_operands_octa, /* LOCAL. */ mmix_operands_local, /* BSPEC. */ mmix_operands_bspec, /* ESPEC. */ mmix_operands_espec, }; struct mmix_opcode { const char *name; unsigned long match; unsigned long lose; enum mmix_operands_type operands; /* This is used by the disassembly function. */ enum mmix_insn_type type; }; /* Declare the actual tables. */ extern const struct mmix_opcode mmix_opcodes[]; /* This one is terminated with an entry with a NULL name. */ extern const struct mmix_spec_reg mmix_spec_regs[]; /* Some insn values we use when padding and synthesizing address loads. */ #define IMM_OFFSET_BIT 1 #define COND_INV_BIT 0x8 #define PRED_INV_BIT 0x10 #define PUSHGO_INSN_BYTE 0xbe #define GO_INSN_BYTE 0x9e #define SETL_INSN_BYTE 0xe3 #define INCML_INSN_BYTE 0xe6 #define INCMH_INSN_BYTE 0xe5 #define INCH_INSN_BYTE 0xe4 #define SWYM_INSN_BYTE 0xfd #define JMP_INSN_BYTE 0xf0 /* We can have 256 - 32 (local registers) - 1 ($255 is not allocatable) global registers. */ #define MAX_GREGS 223