mmix.h revision 1.1
1 /* mmix.h -- Header file for MMIX opcode table 2 Copyright (C) 2001, 2003 Free Software Foundation, Inc. 3 Written by Hans-Peter Nilsson (hp (at) bitrange.com) 4 5 This file is part of GDB, GAS, and the GNU binutils. 6 7 GDB, GAS, and the GNU binutils are free software; you can redistribute 8 them and/or modify them under the terms of the GNU General Public 9 License as published by the Free Software Foundation; either version 2, 10 or (at your option) any later version. 11 12 GDB, GAS, and the GNU binutils are distributed in the hope that they 13 will be useful, but WITHOUT ANY WARRANTY; without even the implied 14 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 15 the GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this file; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 20 21 /* We could have just a char*[] table indexed by the register number, but 22 that would not allow for synonyms. The table is terminated with an 23 entry with a NULL name. */ 24 struct mmix_spec_reg 25 { 26 const char *name; 27 unsigned int number; 28 }; 29 30 /* General indication of the type of instruction. */ 31 enum mmix_insn_type 32 { 33 mmix_type_pseudo, 34 mmix_type_normal, 35 mmix_type_branch, 36 mmix_type_condbranch, 37 mmix_type_memaccess_octa, 38 mmix_type_memaccess_tetra, 39 mmix_type_memaccess_wyde, 40 mmix_type_memaccess_byte, 41 mmix_type_memaccess_block, 42 mmix_type_jsr 43 }; 44 45 /* Type of operands an instruction takes. Use when parsing assembly code 46 and disassembling. */ 47 enum mmix_operands_type 48 { 49 mmix_operands_none = 0, 50 51 /* All operands are registers: "$X,$Y,$Z". */ 52 mmix_operands_regs, 53 54 /* "$X,YZ", like SETH. */ 55 mmix_operands_reg_yz, 56 57 /* The regular "$X,$Y,$Z|Z". 58 The Z is optional; if only "$X,$Y" is given, then "$X,$Y,0" is 59 assumed. */ 60 mmix_operands_regs_z_opt, 61 62 /* The regular "$X,$Y,$Z|Z". */ 63 mmix_operands_regs_z, 64 65 /* "Address"; only JMP. Zero operands allowed unless GNU syntax. */ 66 mmix_operands_jmp, 67 68 /* "$X|X,$Y,$Z|Z": PUSHGO; like "3", but X can be expressed as an 69 integer. */ 70 mmix_operands_pushgo, 71 72 /* Two registers or a register and a byte, like FLOT, possibly with 73 rounding: "$X,$Z|Z" or "$X,ROUND_MODE,$Z|Z". */ 74 mmix_operands_roundregs_z, 75 76 /* "X,YZ", POP. Unless GNU syntax, zero or one operand is allowed. */ 77 mmix_operands_pop, 78 79 /* Two registers, possibly with rounding: "$X,$Z" or 80 "$X,ROUND_MODE,$Z". */ 81 mmix_operands_roundregs, 82 83 /* "XYZ", like SYNC. */ 84 mmix_operands_sync, 85 86 /* "X,$Y,$Z|Z", like SYNCD. */ 87 mmix_operands_x_regs_z, 88 89 /* "$X,Y,$Z|Z", like NEG and NEGU. The Y field is optional, default 0. */ 90 mmix_operands_neg, 91 92 /* "$X,Address, like GETA or branches. */ 93 mmix_operands_regaddr, 94 95 /* "$X|X,Address, like PUSHJ. */ 96 mmix_operands_pushj, 97 98 /* "$X,spec_reg"; GET. */ 99 mmix_operands_get, 100 101 /* "spec_reg,$Z|Z"; PUT. */ 102 mmix_operands_put, 103 104 /* Two registers, "$X,$Y". */ 105 mmix_operands_set, 106 107 /* "$X,0"; SAVE. */ 108 mmix_operands_save, 109 110 /* "0,$Z"; UNSAVE. */ 111 mmix_operands_unsave, 112 113 /* "X,Y,Z"; like SWYM or TRAP. Zero (or 1 if GNU syntax) to three 114 operands, interpreted as 0; XYZ; X, YZ and X, Y, Z. */ 115 mmix_operands_xyz_opt, 116 117 /* Just "Z", like RESUME. Unless GNU syntax, the operand can be omitted 118 and will then be assumed zero. */ 119 mmix_operands_resume, 120 121 /* These are specials to handle that pseudo-directives are specified 122 like ordinary insns when being mmixal-compatible. They signify the 123 specific pseudo-directive rather than the operands type. */ 124 125 /* LOC. */ 126 mmix_operands_loc, 127 128 /* PREFIX. */ 129 mmix_operands_prefix, 130 131 /* BYTE. */ 132 mmix_operands_byte, 133 134 /* WYDE. */ 135 mmix_operands_wyde, 136 137 /* TETRA. */ 138 mmix_operands_tetra, 139 140 /* OCTA. */ 141 mmix_operands_octa, 142 143 /* LOCAL. */ 144 mmix_operands_local, 145 146 /* BSPEC. */ 147 mmix_operands_bspec, 148 149 /* ESPEC. */ 150 mmix_operands_espec, 151 }; 152 153 struct mmix_opcode 154 { 155 const char *name; 156 unsigned long match; 157 unsigned long lose; 158 enum mmix_operands_type operands; 159 160 /* This is used by the disassembly function. */ 161 enum mmix_insn_type type; 162 }; 163 164 /* Declare the actual tables. */ 165 extern const struct mmix_opcode mmix_opcodes[]; 166 167 /* This one is terminated with an entry with a NULL name. */ 168 extern const struct mmix_spec_reg mmix_spec_regs[]; 169 170 /* Some insn values we use when padding and synthesizing address loads. */ 171 #define IMM_OFFSET_BIT 1 172 #define COND_INV_BIT 0x8 173 #define PRED_INV_BIT 0x10 174 175 #define PUSHGO_INSN_BYTE 0xbe 176 #define GO_INSN_BYTE 0x9e 177 #define SETL_INSN_BYTE 0xe3 178 #define INCML_INSN_BYTE 0xe6 179 #define INCMH_INSN_BYTE 0xe5 180 #define INCH_INSN_BYTE 0xe4 181 #define SWYM_INSN_BYTE 0xfd 182 #define JMP_INSN_BYTE 0xf0 183 184 /* We can have 256 - 32 (local registers) - 1 ($255 is not allocatable) 185 global registers. */ 186 #define MAX_GREGS 223 187
Indexes created Wed Mar 04 05:31:52 UTC 2026