187 lines
4.9 KiB
C
187 lines
4.9 KiB
C
/* mmix.h -- Header file for MMIX opcode table
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Copyright (C) 2001, 2003, 2010 Free Software Foundation, Inc.
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Written by Hans-Peter Nilsson (hp@bitrange.com)
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This file is part of GDB, GAS, and the GNU binutils.
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GDB, GAS, and the GNU binutils are free software; you can redistribute
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them and/or modify them under the terms of the GNU General Public
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License as published by the Free Software Foundation; either version 3,
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or (at your option) any later version.
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GDB, GAS, and the GNU binutils are distributed in the hope that they
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will be useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this file; see the file COPYING3. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* We could have just a char*[] table indexed by the register number, but
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that would not allow for synonyms. The table is terminated with an
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entry with a NULL name. */
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struct mmix_spec_reg
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{
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const char *name;
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unsigned int number;
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};
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/* General indication of the type of instruction. */
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enum mmix_insn_type
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{
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mmix_type_pseudo,
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mmix_type_normal,
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mmix_type_branch,
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mmix_type_condbranch,
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mmix_type_memaccess_octa,
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mmix_type_memaccess_tetra,
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mmix_type_memaccess_wyde,
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mmix_type_memaccess_byte,
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mmix_type_memaccess_block,
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mmix_type_jsr
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};
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/* Type of operands an instruction takes. Use when parsing assembly code
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and disassembling. */
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enum mmix_operands_type
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{
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mmix_operands_none = 0,
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/* All operands are registers: "$X,$Y,$Z". */
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mmix_operands_regs,
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/* "$X,YZ", like SETH. */
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mmix_operands_reg_yz,
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/* The regular "$X,$Y,$Z|Z".
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The Z is optional; if only "$X,$Y" is given, then "$X,$Y,0" is
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assumed. */
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mmix_operands_regs_z_opt,
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/* The regular "$X,$Y,$Z|Z". */
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mmix_operands_regs_z,
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/* "Address"; only JMP. Zero operands allowed unless GNU syntax. */
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mmix_operands_jmp,
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/* "$X|X,$Y,$Z|Z": PUSHGO; like "3", but X can be expressed as an
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integer. */
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mmix_operands_pushgo,
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/* Two registers or a register and a byte, like FLOT, possibly with
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rounding: "$X,$Z|Z" or "$X,ROUND_MODE,$Z|Z". */
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mmix_operands_roundregs_z,
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/* "X,YZ", POP. Unless GNU syntax, zero or one operand is allowed. */
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mmix_operands_pop,
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/* Two registers, possibly with rounding: "$X,$Z" or
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"$X,ROUND_MODE,$Z". */
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mmix_operands_roundregs,
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/* "XYZ", like SYNC. */
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mmix_operands_sync,
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/* "X,$Y,$Z|Z", like SYNCD. */
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mmix_operands_x_regs_z,
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/* "$X,Y,$Z|Z", like NEG and NEGU. The Y field is optional, default 0. */
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mmix_operands_neg,
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/* "$X,Address, like GETA or branches. */
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mmix_operands_regaddr,
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/* "$X|X,Address, like PUSHJ. */
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mmix_operands_pushj,
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/* "$X,spec_reg"; GET. */
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mmix_operands_get,
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/* "spec_reg,$Z|Z"; PUT. */
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mmix_operands_put,
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/* Two registers, "$X,$Y". */
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mmix_operands_set,
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/* "$X,0"; SAVE. */
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mmix_operands_save,
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/* "0,$Z"; UNSAVE. */
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mmix_operands_unsave,
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/* "X,Y,Z"; like SWYM or TRAP. Zero (or 1 if GNU syntax) to three
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operands, interpreted as 0; XYZ; X, YZ and X, Y, Z. */
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mmix_operands_xyz_opt,
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/* Just "Z", like RESUME. Unless GNU syntax, the operand can be omitted
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and will then be assumed zero. */
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mmix_operands_resume,
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/* These are specials to handle that pseudo-directives are specified
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like ordinary insns when being mmixal-compatible. They signify the
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specific pseudo-directive rather than the operands type. */
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/* LOC. */
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mmix_operands_loc,
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/* PREFIX. */
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mmix_operands_prefix,
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/* BYTE. */
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mmix_operands_byte,
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/* WYDE. */
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mmix_operands_wyde,
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/* TETRA. */
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mmix_operands_tetra,
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/* OCTA. */
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mmix_operands_octa,
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/* LOCAL. */
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mmix_operands_local,
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/* BSPEC. */
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mmix_operands_bspec,
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/* ESPEC. */
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mmix_operands_espec,
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};
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struct mmix_opcode
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{
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const char *name;
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unsigned long match;
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unsigned long lose;
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enum mmix_operands_type operands;
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/* This is used by the disassembly function. */
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enum mmix_insn_type type;
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};
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/* Declare the actual tables. */
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extern const struct mmix_opcode mmix_opcodes[];
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/* This one is terminated with an entry with a NULL name. */
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extern const struct mmix_spec_reg mmix_spec_regs[];
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/* Some insn values we use when padding and synthesizing address loads. */
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#define IMM_OFFSET_BIT 1
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#define COND_INV_BIT 0x8
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#define PRED_INV_BIT 0x10
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#define PUSHGO_INSN_BYTE 0xbe
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#define GO_INSN_BYTE 0x9e
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#define SETL_INSN_BYTE 0xe3
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#define INCML_INSN_BYTE 0xe6
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#define INCMH_INSN_BYTE 0xe5
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#define INCH_INSN_BYTE 0xe4
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#define SWYM_INSN_BYTE 0xfd
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#define JMP_INSN_BYTE 0xf0
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/* We can have 256 - 32 (local registers) - 1 ($255 is not allocatable)
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global registers. */
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#define MAX_GREGS 223
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