include/opcode/m88k.h

   1 /* Table of opcodes for the Motorola M88k family.
   2    Copyright 1989, 1990, 1991, 1993, 2001 Free Software Foundation, Inc.
   3
   4 This file is part of GDB and GAS.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /*
  21  *                      Disassembler Instruction Table
  22  *
  23  *      The first field of the table is the opcode field. If an opcode
  24  *      is specified which has any non-opcode bits on, a system error
  25  *      will occur when the system attempts the install it into the
  26  *      instruction table.  The second parameter is a pointer to the
  27  *      instruction mnemonic. Each operand is specified by offset, width,
  28  *      and type. The offset is the bit number of the least significant
  29  *      bit of the operand with bit 0 being the least significant bit of
  30  *      the instruction. The width is the number of bits used to specify
  31  *      the operand. The type specifies the output format to be used for
  32  *      the operand. The valid formats are: register, register indirect,
  33  *      hex constant, and bit field specification.  The last field is a
  34  *      pointer to the next instruction in the linked list.  These pointers
  35  *      are initialized by init_disasm().
  36  *
  37  *                              Revision History
  38  *
  39  *      Revision 1.0    11/08/85        Creation date
  40  *               1.1    02/05/86        Updated instruction mnemonic table MD
  41  *               1.2    06/16/86        Updated SIM_FLAGS for floating point
  42  *               1.3    09/20/86        Updated for new encoding
  43  *                      05/11/89        R. Trawick adapted from Motorola disassembler
  44  */
  45
  46 #include <stdio.h>
  47
  48 /* Define the number of bits in the primary opcode field of the instruction,
  49    the destination field, the source 1 and source 2 fields.  */
  50
  51 /* Size of opcode field.  */
  52 #define OP 8
  53
  54 /* Size of destination.  */
  55 #define DEST 6
  56
  57 /* Size of source1.  */
  58 #define SOURCE1 6
  59
  60 /* Size of source2.  */
  61 #define SOURCE2 6
  62
  63 /* Number of registers.  */
  64 #define REGs 32
  65
  66 /* Type definitions.  */
  67
  68 typedef unsigned int UINT;
  69 #define    WORD    long
  70 #define    FLAG    unsigned
  71 #define    STATE   short
  72
  73 /* The next four equates define the priorities that the various classes
  74  * of instructions have regarding writing results back into registers and
  75  * signalling exceptions.  */
  76
  77 /* PMEM is also defined in <sys/param.h> on Delta 88's.  Sigh!  */
  78 #undef PMEM
  79
  80 /* Integer priority.  */
  81 #define    PINT  0
  82
  83 /* Floating point priority.  */
  84 #define    PFLT  1
  85
  86 /* Memory priority.  */
  87 #define    PMEM  2
  88
  89 /* Not applicable, instruction doesn't write to regs.  */
  90 #define    NA    3
  91
  92 /* Highest of these priorities.  */
  93 #define    HIPRI 3
  94
  95 /* The instruction registers are an artificial mechanism to speed up
  96  * simulator execution.  In the real processor, an instruction register
  97  * is 32 bits wide.  In the simulator, the 32 bit instruction is kept in
  98  * a structure field called rawop, and the instruction is partially decoded,
  99  * and split into various fields and flags which make up the other fields
 100  * of the structure.
 101  * The partial decode is done when the instructions are initially loaded
 102  * into simulator memory.  The simulator code memory is not an array of
 103  * 32 bit words, but is an array of instruction register structures.
 104  * Yes this wastes memory, but it executes much quicker.
 105  */
 106
 107 struct IR_FIELDS
 108 {
 109   unsigned op:OP,
 110     dest: DEST,
 111     src1: SOURCE1,
 112     src2: SOURCE2;
 113   int ltncy,
 114     extime,
 115     /* Writeback priority.  */
 116     wb_pri;
 117   /* Immediate size.  */
 118   unsigned        imm_flags:2,
 119     /* Register source 1 used.  */
 120     rs1_used:1,
 121     /* Register source 2 used. */
 122     rs2_used:1,
 123     /* Register source/dest. used.  */
 124     rsd_used:1,
 125     /* Complement.  */
 126     c_flag:1,
 127     /* Upper half word.  */
 128     u_flag:1,
 129     /* Execute next.  */
 130     n_flag:1,
 131     /* Uses writeback slot.  */
 132     wb_flag:1,
 133     /* Dest size.  */
 134     dest_64:1,
 135     /* Source 1 size.  */
 136     s1_64:1,
 137     /* Source 2 size.  */
 138     s2_64:1,
 139     scale_flag:1,
 140     /* Scaled register.  */
 141     brk_flg:1;
 142 };
 143
 144 struct  mem_segs
 145 {
 146   /* Pointer (returned by calloc) to segment.  */
 147   struct mem_wrd *seg;
 148
 149   /* Base load address from file headers.  */
 150   unsigned long baseaddr;
 151
 152   /* Ending address of segment.  */
 153   unsigned long endaddr;
 154
 155   /* Segment control flags (none defined).  */
 156   int         flags;
 157 };
 158
 159 #define MAXSEGS         (10)                    /* max number of segment allowed */
 160 #define MEMSEGSIZE      (sizeof(struct mem_segs))/* size of mem_segs structure */
 161
 162 #if 0
 163 #define BRK_RD          (0x01)                  /* break on memory read */
 164 #define BRK_WR          (0x02)                  /* break on memory write */
 165 #define BRK_EXEC        (0x04)                  /* break on execution */
 166 #define BRK_CNT         (0x08)                  /* break on terminal count */
 167 #endif
 168
 169 struct mem_wrd
 170 {
 171   /* Simulator instruction break down.  */
 172   struct IR_FIELDS opcode;
 173   union {
 174     /* Memory element break down.  */
 175     unsigned long  l;
 176     unsigned short s[2];
 177     unsigned char  c[4];
 178   } mem;
 179 };
 180
 181 /* Size of each 32 bit memory model.  */
 182 #define MEMWRDSIZE      (sizeof (struct mem_wrd))
 183
 184 extern struct mem_segs memory[];
 185 extern struct PROCESSOR m78000;
 186
 187 struct PROCESSOR
 188 {
 189   unsigned WORD
 190   /* Execute instruction pointer.  */
 191   ip,
 192     /* Vector base register.  */
 193     vbr,
 194     /* Processor status register.  */
 195     psr;
 196
 197   /* Source 1.  */
 198   WORD    S1bus,
 199     /* Source 2.  */
 200     S2bus,
 201     /* Destination.  */
 202     Dbus,
 203     /* Data address bus.  */
 204     DAbus,
 205     ALU,
 206     /* Data registers.  */
 207     Regs[REGs],
 208     /* Max clocks before reg is available.  */
 209     time_left[REGs],
 210     /* Writeback priority of reg.  */
 211     wb_pri[REGs],
 212     /* Integer unit control regs.  */
 213     SFU0_regs[REGs],
 214     /* Floating point control regs.  */
 215     SFU1_regs[REGs],
 216     Scoreboard[REGs],
 217     Vbr;
 218   unsigned WORD   scoreboard,
 219     Psw,
 220     Tpsw;
 221   /* Waiting for a jump instruction.  */
 222   FLAG   jump_pending:1;
 223 };
 224
 225 /* Size of immediate field.  */
 226
 227 #define    i26bit      1
 228 #define    i16bit      2
 229 #define    i10bit      3
 230
 231 /* Definitions for fields in psr.  */
 232
 233 #define mode  31
 234 #define rbo   30
 235 #define ser   29
 236 #define carry 28
 237 #define sf7m  11
 238 #define sf6m  10
 239 #define sf5m   9
 240 #define sf4m   8
 241 #define sf3m   7
 242 #define sf2m   6
 243 #define sf1m   5
 244 #define mam    4
 245 #define inm    3
 246 #define exm    2
 247 #define trm    1
 248 #define ovfm   0
 249
 250 /* The 1 clock operations.  */
 251
 252 #define    ADDU        1
 253 #define    ADDC        2
 254 #define    ADDUC       3
 255 #define    ADD         4
 256
 257 #define    SUBU    ADD+1
 258 #define    SUBB    ADD+2
 259 #define    SUBUB   ADD+3
 260 #define    SUB     ADD+4
 261
 262 #define    AND_    ADD+5
 263 #define    OR      ADD+6
 264 #define    XOR     ADD+7
 265 #define    CMP     ADD+8
 266
 267 /* Loads.  */
 268
 269 #define    LDAB    CMP+1
 270 #define    LDAH    CMP+2
 271 #define    LDA     CMP+3
 272 #define    LDAD    CMP+4
 273
 274 #define    LDB   LDAD+1
 275 #define    LDH   LDAD+2
 276 #define    LD    LDAD+3
 277 #define    LDD   LDAD+4
 278 #define    LDBU  LDAD+5
 279 #define    LDHU  LDAD+6
 280
 281 /* Stores.  */
 282
 283 #define    STB    LDHU+1
 284 #define    STH    LDHU+2
 285 #define    ST     LDHU+3
 286 #define    STD    LDHU+4
 287
 288 /* Exchange.  */
 289
 290 #define    XMEMBU LDHU+5
 291 #define    XMEM   LDHU+6
 292
 293 /* Branches.  */
 294
 295 #define    JSR    STD+1
 296 #define    BSR    STD+2
 297 #define    BR     STD+3
 298 #define    JMP    STD+4
 299 #define    BB1    STD+5
 300 #define    BB0    STD+6
 301 #define    RTN    STD+7
 302 #define    BCND   STD+8
 303
 304 /* Traps.  */
 305
 306 #define    TB1    BCND+1
 307 #define    TB0    BCND+2
 308 #define    TCND   BCND+3
 309 #define    RTE    BCND+4
 310 #define    TBND   BCND+5
 311
 312 /* Misc.  */
 313
 314 #define    MUL     TBND + 1
 315 #define    DIV     MUL  +2
 316 #define    DIVU    MUL  +3
 317 #define    MASK    MUL  +4
 318 #define    FF0     MUL  +5
 319 #define    FF1     MUL  +6
 320 #define    CLR     MUL  +7
 321 #define    SET     MUL  +8
 322 #define    EXT     MUL  +9
 323 #define    EXTU    MUL  +10
 324 #define    MAK     MUL  +11
 325 #define    ROT     MUL  +12
 326
 327 /* Control register manipulations.  */
 328
 329 #define    LDCR    ROT  +1
 330 #define    STCR    ROT  +2
 331 #define    XCR     ROT  +3
 332
 333 #define    FLDCR    ROT  +4
 334 #define    FSTCR    ROT  +5
 335 #define    FXCR     ROT  +6
 336
 337 #define    NOP     XCR +1
 338
 339 /* Floating point instructions.  */
 340
 341 #define    FADD    NOP +1
 342 #define    FSUB    NOP +2
 343 #define    FMUL    NOP +3
 344 #define    FDIV    NOP +4
 345 #define    FSQRT   NOP +5
 346 #define    FCMP    NOP +6
 347 #define    FIP     NOP +7
 348 #define    FLT     NOP +8
 349 #define    INT     NOP +9
 350 #define    NINT    NOP +10
 351 #define    TRNC    NOP +11
 352 #define    FLDC   NOP +12
 353 #define    FSTC   NOP +13
 354 #define    FXC    NOP +14
 355
 356 #define UEXT(src,off,wid) \
 357   ((((unsigned int)(src)) >> (off)) & ((1 << (wid)) - 1))
 358
 359 #define SEXT(src,off,wid) \
 360   (((((int)(src))<<(32 - ((off) + (wid)))) >>(32 - (wid))) )
 361
 362 #define MAKE(src,off,wid) \
 363   ((((unsigned int)(src)) & ((1 << (wid)) - 1)) << (off))
 364
 365 #define opword(n) (unsigned long) (memaddr->mem.l)
 366
 367 /* Constants and masks.  */
 368
 369 #define SFU0       0x80000000
 370 #define SFU1       0x84000000
 371 #define SFU7       0x9c000000
 372 #define RRI10      0xf0000000
 373 #define RRR        0xf4000000
 374 #define SFUMASK    0xfc00ffe0
 375 #define RRRMASK    0xfc00ffe0
 376 #define RRI10MASK  0xfc00fc00
 377 #define DEFMASK    0xfc000000
 378 #define CTRL       0x0000f000
 379 #define CTRLMASK   0xfc00f800
 380
 381 /* Operands types.  */
 382
 383 enum operand_type
 384 {
 385   HEX = 1,
 386   REG = 2,
 387   CONT = 3,
 388   IND = 3,
 389   BF = 4,
 390   /* Scaled register.  */
 391   REGSC = 5,
 392   /* Control register.  */
 393   CRREG = 6,
 394   /* Floating point control register.  */
 395   FCRREG = 7,
 396   PCREL = 8,
 397   CONDMASK = 9,
 398   /* Extended register.  */
 399   XREG = 10,
 400   /* Decimal.  */
 401   DEC = 11
 402 };
 403
 404 /* Hashing specification.  */
 405
 406 #define HASHVAL     79
 407
 408 /* Structure templates.  */
 409
 410 typedef struct
 411 {
 412   unsigned int offset;
 413   unsigned int width;
 414   enum operand_type type;
 415 } OPSPEC;
 416
 417 struct SIM_FLAGS
 418 {
 419   int  ltncy,   /* latency (max number of clocks needed to execute).  */
 420     extime,   /* execution time (min number of clocks needed to execute).  */
 421     wb_pri;   /* writeback slot priority.  */
 422   unsigned         op:OP,   /* simulator version of opcode.  */
 423     imm_flags:2,   /* 10,16 or 26 bit immediate flags.  */
 424     rs1_used:1,   /* register source 1 used.  */
 425     rs2_used:1,   /* register source 2 used.  */
 426     rsd_used:1,   /* register source/dest used.  */
 427     c_flag:1,   /* complement.  */
 428     u_flag:1,   /* upper half word.  */
 429     n_flag:1,   /* execute next.  */
 430     wb_flag:1,   /* uses writeback slot.  */
 431     dest_64:1,   /* double precision dest.  */
 432     s1_64:1,   /* double precision source 1.  */
 433     s2_64:1,   /* double precision source 2.  */
 434     scale_flag:1;   /* register is scaled.  */
 435 };
 436
 437 typedef struct INSTRUCTAB {
 438   unsigned int  opcode;
 439   char          *mnemonic;
 440   OPSPEC        op1,op2,op3;
 441   struct SIM_FLAGS flgs;
 442 } INSTAB;
 443 \f
 444
 445 #define NO_OPERAND {0,0,0}
 446
 447 extern const INSTAB  instructions[];
 448
 449 /*
 450  * Local Variables:
 451  * fill-column: 131
 452  * End:
 453  */