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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [include/] [opcode/] [mmix.h] - Blame information for rev 856

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1 24 jeremybenn
/* mmix.h -- Header file for MMIX opcode table
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   Copyright (C) 2001, 2003 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 2,
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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 COPYING.  If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, 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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