sdcc/support/sdbinutils/include/opcode/m88k.h

   1 /* Table of opcodes for the Motorola M88k family.
   2    Copyright (C) 1989-2018 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 /*
  22  *                      Disassembler Instruction Table
  23  *
  24  *      The first field of the table is the opcode field. If an opcode
  25  *      is specified which has any non-opcode bits on, a system error
  26  *      will occur when the system attempts the install it into the
  27  *      instruction table.  The second parameter is a pointer to the
  28  *      instruction mnemonic. Each operand is specified by offset, width,
  29  *      and type. The offset is the bit number of the least significant
  30  *      bit of the operand with bit 0 being the least significant bit of
  31  *      the instruction. The width is the number of bits used to specify
  32  *      the operand. The type specifies the output format to be used for
  33  *      the operand. The valid formats are: register, register indirect,
  34  *      hex constant, and bit field specification.  The last field is a
  35  *      pointer to the next instruction in the linked list.  These pointers
  36  *      are initialized by init_disasm().
  37  *
  38  *                              Revision History
  39  *
  40  *      Revision 1.0    11/08/85        Creation date
  41  *               1.1    02/05/86        Updated instruction mnemonic table MD
  42  *               1.2    06/16/86        Updated SIM_FLAGS for floating point
  43  *               1.3    09/20/86        Updated for new encoding
  44  *                      05/11/89        R. Trawick adapted from Motorola disassembler
  45  */
  46
  47 #include <stdio.h>
  48
  49 /* Define the number of bits in the primary opcode field of the instruction,
  50    the destination field, the source 1 and source 2 fields.  */
  51
  52 /* Size of opcode field.  */
  53 #define OP 8
  54
  55 /* Size of destination.  */
  56 #define DEST 6
  57
  58 /* Size of source1.  */
  59 #define SOURCE1 6
  60
  61 /* Size of source2.  */
  62 #define SOURCE2 6
  63
  64 /* Number of registers.  */
  65 #define REGs 32
  66
  67 /* Type definitions.  */
  68
  69 typedef unsigned int UINT;
  70 #define    WORD    long
  71 #define    FLAG    unsigned
  72 #define    STATE   short
  73
  74 /* The next four equates define the priorities that the various classes
  75  * of instructions have regarding writing results back into registers and
  76  * signalling exceptions.  */
  77
  78 /* PMEM is also defined in <sys/param.h> on Delta 88's.  Sigh!  */
  79 #undef PMEM
  80
  81 /* Integer priority.  */
  82 #define    PINT  0
  83
  84 /* Floating point priority.  */
  85 #define    PFLT  1
  86
  87 /* Memory priority.  */
  88 #define    PMEM  2
  89
  90 /* Not applicable, instruction doesn't write to regs.  */
  91 #define    NA    3
  92
  93 /* Highest of these priorities.  */
  94 #define    HIPRI 3
  95
  96 /* The instruction registers are an artificial mechanism to speed up
  97  * simulator execution.  In the real processor, an instruction register
  98  * is 32 bits wide.  In the simulator, the 32 bit instruction is kept in
  99  * a structure field called rawop, and the instruction is partially decoded,
 100  * and split into various fields and flags which make up the other fields
 101  * of the structure.
 102  * The partial decode is done when the instructions are initially loaded
 103  * into simulator memory.  The simulator code memory is not an array of
 104  * 32 bit words, but is an array of instruction register structures.
 105  * Yes this wastes memory, but it executes much quicker.
 106  */
 107
 108 struct IR_FIELDS
 109 {
 110   unsigned op:OP,
 111     dest: DEST,
 112     src1: SOURCE1,
 113     src2: SOURCE2;
 114   int ltncy,
 115     extime,
 116     /* Writeback priority.  */
 117     wb_pri;
 118   /* Immediate size.  */
 119   unsigned        imm_flags:2,
 120     /* Register source 1 used.  */
 121     rs1_used:1,
 122     /* Register source 2 used. */
 123     rs2_used:1,
 124     /* Register source/dest. used.  */
 125     rsd_used:1,
 126     /* Complement.  */
 127     c_flag:1,
 128     /* Upper half word.  */
 129     u_flag:1,
 130     /* Execute next.  */
 131     n_flag:1,
 132     /* Uses writeback slot.  */
 133     wb_flag:1,
 134     /* Dest size.  */
 135     dest_64:1,
 136     /* Source 1 size.  */
 137     s1_64:1,
 138     /* Source 2 size.  */
 139     s2_64:1,
 140     scale_flag:1,
 141     /* Scaled register.  */
 142     brk_flg:1;
 143 };
 144
 145 struct  mem_segs
 146 {
 147   /* Pointer (returned by calloc) to segment.  */
 148   struct mem_wrd *seg;
 149
 150   /* Base load address from file headers.  */
 151   unsigned long baseaddr;
 152
 153   /* Ending address of segment.  */
 154   unsigned long endaddr;
 155
 156   /* Segment control flags (none defined).  */
 157   int         flags;
 158 };
 159
 160 #define MAXSEGS         (10)                    /* max number of segment allowed */
 161 #define MEMSEGSIZE      (sizeof(struct mem_segs))/* size of mem_segs structure */
 162
 163 #if 0
 164 #define BRK_RD          (0x01)                  /* break on memory read */
 165 #define BRK_WR          (0x02)                  /* break on memory write */
 166 #define BRK_EXEC        (0x04)                  /* break on execution */
 167 #define BRK_CNT         (0x08)                  /* break on terminal count */
 168 #endif
 169
 170 struct mem_wrd
 171 {
 172   /* Simulator instruction break down.  */
 173   struct IR_FIELDS opcode;
 174   union {
 175     /* Memory element break down.  */
 176     unsigned long  l;
 177     unsigned short s[2];
 178     unsigned char  c[4];
 179   } mem;
 180 };
 181
 182 /* Size of each 32 bit memory model.  */
 183 #define MEMWRDSIZE      (sizeof (struct mem_wrd))
 184
 185 extern struct mem_segs memory[];
 186 extern struct PROCESSOR m78000;
 187
 188 struct PROCESSOR
 189 {
 190   unsigned WORD
 191   /* Execute instruction pointer.  */
 192   ip,
 193     /* Vector base register.  */
 194     vbr,
 195     /* Processor status register.  */
 196     psr;
 197
 198   /* Source 1.  */
 199   WORD    S1bus,
 200     /* Source 2.  */
 201     S2bus,
 202     /* Destination.  */
 203     Dbus,
 204     /* Data address bus.  */
 205     DAbus,
 206     ALU,
 207     /* Data registers.  */
 208     Regs[REGs],
 209     /* Max clocks before reg is available.  */
 210     time_left[REGs],
 211     /* Writeback priority of reg.  */
 212     wb_pri[REGs],
 213     /* Integer unit control regs.  */
 214     SFU0_regs[REGs],
 215     /* Floating point control regs.  */
 216     SFU1_regs[REGs],
 217     Scoreboard[REGs],
 218     Vbr;
 219   unsigned WORD   scoreboard,
 220     Psw,
 221     Tpsw;
 222   /* Waiting for a jump instruction.  */
 223   FLAG   jump_pending:1;
 224 };
 225
 226 /* Size of immediate field.  */
 227
 228 #define    i26bit      1
 229 #define    i16bit      2
 230 #define    i10bit      3
 231
 232 /* Definitions for fields in psr.  */
 233
 234 #define psr_mode  31
 235 #define psr_rbo   30
 236 #define psr_ser   29
 237 #define psr_carry 28
 238 #define psr_sf7m  11
 239 #define psr_sf6m  10
 240 #define psr_sf5m   9
 241 #define psr_sf4m   8
 242 #define psr_sf3m   7
 243 #define psr_sf2m   6
 244 #define psr_sf1m   5
 245 #define psr_mam    4
 246 #define psr_inm    3
 247 #define psr_exm    2
 248 #define psr_trm    1
 249 #define psr_ovfm   0
 250
 251 /* The 1 clock operations.  */
 252
 253 #define    ADDU        1
 254 #define    ADDC        2
 255 #define    ADDUC       3
 256 #define    ADD         4
 257
 258 #define    SUBU    ADD+1
 259 #define    SUBB    ADD+2
 260 #define    SUBUB   ADD+3
 261 #define    SUB     ADD+4
 262
 263 #define    AND_    ADD+5
 264 #define    OR      ADD+6
 265 #define    XOR     ADD+7
 266 #define    CMP     ADD+8
 267
 268 /* Loads.  */
 269
 270 #define    LDAB    CMP+1
 271 #define    LDAH    CMP+2
 272 #define    LDA     CMP+3
 273 #define    LDAD    CMP+4
 274
 275 #define    LDB   LDAD+1
 276 #define    LDH   LDAD+2
 277 #define    LD    LDAD+3
 278 #define    LDD   LDAD+4
 279 #define    LDBU  LDAD+5
 280 #define    LDHU  LDAD+6
 281
 282 /* Stores.  */
 283
 284 #define    STB    LDHU+1
 285 #define    STH    LDHU+2
 286 #define    ST     LDHU+3
 287 #define    STD    LDHU+4
 288
 289 /* Exchange.  */
 290
 291 #define    XMEMBU LDHU+5
 292 #define    XMEM   LDHU+6
 293
 294 /* Branches.  */
 295
 296 #define    JSR    STD+1
 297 #define    BSR    STD+2
 298 #define    BR     STD+3
 299 #define    JMP    STD+4
 300 #define    BB1    STD+5
 301 #define    BB0    STD+6
 302 #define    RTN    STD+7
 303 #define    BCND   STD+8
 304
 305 /* Traps.  */
 306
 307 #define    TB1    BCND+1
 308 #define    TB0    BCND+2
 309 #define    TCND   BCND+3
 310 #define    RTE    BCND+4
 311 #define    TBND   BCND+5
 312
 313 /* Misc.  */
 314
 315 #define    MUL     TBND + 1
 316 #define    DIV     MUL  +2
 317 #define    DIVU    MUL  +3
 318 #define    MASK    MUL  +4
 319 #define    FF0     MUL  +5
 320 #define    FF1     MUL  +6
 321 #define    CLR     MUL  +7
 322 #define    SET     MUL  +8
 323 #define    EXT     MUL  +9
 324 #define    EXTU    MUL  +10
 325 #define    MAK     MUL  +11
 326 #define    ROT     MUL  +12
 327
 328 /* Control register manipulations.  */
 329
 330 #define    LDCR    ROT  +1
 331 #define    STCR    ROT  +2
 332 #define    XCR     ROT  +3
 333
 334 #define    FLDCR    ROT  +4
 335 #define    FSTCR    ROT  +5
 336 #define    FXCR     ROT  +6
 337
 338 #define    NOP     XCR +1
 339
 340 /* Floating point instructions.  */
 341
 342 #define    FADD    NOP +1
 343 #define    FSUB    NOP +2
 344 #define    FMUL    NOP +3
 345 #define    FDIV    NOP +4
 346 #define    FSQRT   NOP +5
 347 #define    FCMP    NOP +6
 348 #define    FIP     NOP +7
 349 #define    FLT     NOP +8
 350 #define    INT     NOP +9
 351 #define    NINT    NOP +10
 352 #define    TRNC    NOP +11
 353 #define    FLDC   NOP +12
 354 #define    FSTC   NOP +13
 355 #define    FXC    NOP +14
 356
 357 #define UEXT(src,off,wid) \
 358   ((((unsigned int)(src)) >> (off)) & ((1 << (wid)) - 1))
 359
 360 #define SEXT(src,off,wid) \
 361   (((((int)(src))<<(32 - ((off) + (wid)))) >>(32 - (wid))) )
 362
 363 #define MAKE(src,off,wid) \
 364   ((((unsigned int)(src)) & ((1 << (wid)) - 1)) << (off))
 365
 366 #define opword(n) (unsigned long) (memaddr->mem.l)
 367
 368 /* Constants and masks.  */
 369
 370 #define SFU0       0x80000000
 371 #define SFU1       0x84000000
 372 #define SFU7       0x9c000000
 373 #define RRI10      0xf0000000
 374 #define RRR        0xf4000000
 375 #define SFUMASK    0xfc00ffe0
 376 #define RRRMASK    0xfc00ffe0
 377 #define RRI10MASK  0xfc00fc00
 378 #define DEFMASK    0xfc000000
 379 #define CTRL       0x0000f000
 380 #define CTRLMASK   0xfc00f800
 381
 382 /* Operands types.  */
 383
 384 enum operand_type
 385 {
 386   HEX = 1,
 387   REG = 2,
 388   CONT = 3,
 389   IND = 3,
 390   BF = 4,
 391   /* Scaled register.  */
 392   REGSC = 5,
 393   /* Control register.  */
 394   CRREG = 6,
 395   /* Floating point control register.  */
 396   FCRREG = 7,
 397   PCREL = 8,
 398   CONDMASK = 9,
 399   /* Extended register.  */
 400   XREG = 10,
 401   /* Decimal.  */
 402   DEC = 11
 403 };
 404
 405 /* Hashing specification.  */
 406
 407 #define HASHVAL     79
 408
 409 /* Structure templates.  */
 410
 411 typedef struct
 412 {
 413   unsigned int offset;
 414   unsigned int width;
 415   enum operand_type type;
 416 } OPSPEC;
 417
 418 struct SIM_FLAGS
 419 {
 420   int  ltncy,   /* latency (max number of clocks needed to execute).  */
 421     extime,   /* execution time (min number of clocks needed to execute).  */
 422     wb_pri;   /* writeback slot priority.  */
 423   unsigned         op:OP,   /* simulator version of opcode.  */
 424     imm_flags:2,   /* 10,16 or 26 bit immediate flags.  */
 425     rs1_used:1,   /* register source 1 used.  */
 426     rs2_used:1,   /* register source 2 used.  */
 427     rsd_used:1,   /* register source/dest used.  */
 428     c_flag:1,   /* complement.  */
 429     u_flag:1,   /* upper half word.  */
 430     n_flag:1,   /* execute next.  */
 431     wb_flag:1,   /* uses writeback slot.  */
 432     dest_64:1,   /* double precision dest.  */
 433     s1_64:1,   /* double precision source 1.  */
 434     s2_64:1,   /* double precision source 2.  */
 435     scale_flag:1;   /* register is scaled.  */
 436 };
 437
 438 typedef struct INSTRUCTAB {
 439   unsigned int  opcode;
 440   char          *mnemonic;
 441   OPSPEC        op1,op2,op3;
 442   struct SIM_FLAGS flgs;
 443 } INSTAB;
 444 \f
 445
 446 #define NO_OPERAND {0,0,0}
 447
 448 extern const INSTAB  instructions[];
 449
 450 /*
 451  * Local Variables:
 452  * fill-column: 131
 453  * End:
 454  */