opcodes/rx-decode.opc

   1 /* -*- c -*- */
   2 /* Copyright 2012 Free Software Foundation, Inc.
   3    Contributed by Red Hat.
   4    Written by DJ Delorie.
   5
   6    This file is part of the GNU opcodes library.
   7
   8    This library is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    It is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include "ansidecl.h"
  28 #include "opcode/rx.h"
  29
  30 #define RX_OPCODE_BIG_ENDIAN 0
  31
  32 typedef struct
  33 {
  34   RX_Opcode_Decoded * rx;
  35   int (* getbyte)(void *);
  36   void * ptr;
  37   unsigned char * op;
  38 } LocalData;
  39
  40 static int trace = 0;
  41
  42 #define BSIZE 0
  43 #define WSIZE 1
  44 #define LSIZE 2
  45
  46 /* These are for when the upper bits are "don't care" or "undefined".  */
  47 static int bwl[] =
  48 {
  49   RX_Byte,
  50   RX_Word,
  51   RX_Long
  52 };
  53
  54 static int sbwl[] =
  55 {
  56   RX_SByte,
  57   RX_SWord,
  58   RX_Long
  59 };
  60
  61 static int ubwl[] =
  62 {
  63   RX_UByte,
  64   RX_UWord,
  65   RX_Long
  66 };
  67
  68 static int memex[] =
  69 {
  70   RX_SByte,
  71   RX_SWord,
  72   RX_Long,
  73   RX_UWord
  74 };
  75
  76 #define ID(x) rx->id = RXO_##x
  77 #define OP(n,t,r,a) (rx->op[n].type = t, \
  78                      rx->op[n].reg = r,      \
  79                      rx->op[n].addend = a )
  80 #define OPs(n,t,r,a,s) (OP (n,t,r,a), \
  81                         rx->op[n].size = s )
  82
  83 /* This is for the BWL and BW bitfields.  */
  84 static int SCALE[] = { 1, 2, 4 };
  85 /* This is for the prefix size enum.  */
  86 static int PSCALE[] = { 4, 1, 1, 1, 2, 2, 2, 3, 4 };
  87
  88 static int flagmap[] = {0, 1, 2, 3, 0, 0, 0, 0,
  89                        16, 17, 0, 0, 0, 0, 0, 0 };
  90
  91 static int dsp3map[] = { 8, 9, 10, 3, 4, 5, 6, 7 };
  92
  93 /*
  94  *C     a constant (immediate) c
  95  *R     A register
  96  *I     Register indirect, no offset
  97  *Is    Register indirect, with offset
  98  *D     standard displacement: type (r,[r],dsp8,dsp16 code), register, BWL code
  99  *P     standard displacement: type (r,[r]), reg, assumes UByte
 100  *Pm    memex displacement: type (r,[r]), reg, memex code
 101  *cc    condition code.  */
 102
 103 #define DC(c)       OP (0, RX_Operand_Immediate, 0, c)
 104 #define DR(r)       OP (0, RX_Operand_Register,  r, 0)
 105 #define DI(r,a)     OP (0, RX_Operand_Indirect,  r, a)
 106 #define DIs(r,a,s)  OP (0, RX_Operand_Indirect,  r, (a) * SCALE[s])
 107 #define DD(t,r,s)   rx_disp (0, t, r, bwl[s], ld);
 108 #define DF(r)       OP (0, RX_Operand_Flag,  flagmap[r], 0)
 109
 110 #define SC(i)       OP (1, RX_Operand_Immediate, 0, i)
 111 #define SR(r)       OP (1, RX_Operand_Register,  r, 0)
 112 #define SRR(r)      OP (1, RX_Operand_TwoReg,  r, 0)
 113 #define SI(r,a)     OP (1, RX_Operand_Indirect,  r, a)
 114 #define SIs(r,a,s)  OP (1, RX_Operand_Indirect,  r, (a) * SCALE[s])
 115 #define SD(t,r,s)   rx_disp (1, t, r, bwl[s], ld);
 116 #define SP(t,r)     rx_disp (1, t, r, (t!=3) ? RX_UByte : RX_Long, ld); P(t, 1);
 117 #define SPm(t,r,m)  rx_disp (1, t, r, memex[m], ld); rx->op[1].size = memex[m];
 118 #define Scc(cc)     OP (1, RX_Operand_Condition,  cc, 0)
 119
 120 #define S2C(i)      OP (2, RX_Operand_Immediate, 0, i)
 121 #define S2R(r)      OP (2, RX_Operand_Register,  r, 0)
 122 #define S2I(r,a)    OP (2, RX_Operand_Indirect,  r, a)
 123 #define S2Is(r,a,s) OP (2, RX_Operand_Indirect,  r, (a) * SCALE[s])
 124 #define S2D(t,r,s)  rx_disp (2, t, r, bwl[s], ld);
 125 #define S2P(t,r)    rx_disp (2, t, r, (t!=3) ? RX_UByte : RX_Long, ld); P(t, 2);
 126 #define S2Pm(t,r,m) rx_disp (2, t, r, memex[m], ld); rx->op[2].size = memex[m];
 127 #define S2cc(cc)    OP (2, RX_Operand_Condition,  cc, 0)
 128
 129 #define BWL(sz)     rx->op[0].size = rx->op[1].size = rx->op[2].size = rx->size = bwl[sz]
 130 #define sBWL(sz)    rx->op[0].size = rx->op[1].size = rx->op[2].size = rx->size = sbwl[sz]
 131 #define uBWL(sz)    rx->op[0].size = rx->op[1].size = rx->op[2].size = rx->size = ubwl[sz]
 132 #define P(t, n)     rx->op[n].size = (t!=3) ? RX_UByte : RX_Long;
 133
 134 #define F(f) store_flags(rx, f)
 135
 136 #define AU ATTRIBUTE_UNUSED
 137 #define GETBYTE() (ld->op [ld->rx->n_bytes++] = ld->getbyte (ld->ptr))
 138
 139 #define SYNTAX(x) rx->syntax = x
 140
 141 #define UNSUPPORTED() \
 142   rx->syntax = "*unknown*"
 143
 144 #define IMM(sf)   immediate (sf, 0, ld)
 145 #define IMMex(sf) immediate (sf, 1, ld)
 146
 147 static int
 148 immediate (int sfield, int ex, LocalData * ld)
 149 {
 150   unsigned long i = 0, j;
 151
 152   switch (sfield)
 153     {
 154 #define B ((unsigned long) GETBYTE())
 155     case 0:
 156 #if RX_OPCODE_BIG_ENDIAN
 157       i  = B;
 158       if (ex && (i & 0x80))
 159         i -= 0x100;
 160       i <<= 24;
 161       i |= B << 16;
 162       i |= B << 8;
 163       i |= B;
 164 #else
 165       i = B;
 166       i |= B << 8;
 167       i |= B << 16;
 168       j = B;
 169       if (ex && (j & 0x80))
 170         j -= 0x100;
 171       i |= j << 24;
 172 #endif
 173       break;
 174     case 3:
 175 #if RX_OPCODE_BIG_ENDIAN
 176       i  = B << 16;
 177       i |= B << 8;
 178       i |= B;
 179 #else
 180       i  = B;
 181       i |= B << 8;
 182       i |= B << 16;
 183 #endif
 184       if (ex && (i & 0x800000))
 185         i -= 0x1000000;
 186       break;
 187     case 2:
 188 #if RX_OPCODE_BIG_ENDIAN
 189       i |= B << 8;
 190       i |= B;
 191 #else
 192       i |= B;
 193       i |= B << 8;
 194 #endif
 195       if (ex && (i & 0x8000))
 196         i -= 0x10000;
 197       break;
 198     case 1:
 199       i |= B;
 200       if (ex && (i & 0x80))
 201         i -= 0x100;
 202       break;
 203     default:
 204       abort();
 205     }
 206   return i;
 207 }
 208
 209 static void
 210 rx_disp (int n, int type, int reg, int size, LocalData * ld)
 211 {
 212   int disp;
 213
 214   ld->rx->op[n].reg = reg;
 215   switch (type)
 216     {
 217     case 3:
 218       ld->rx->op[n].type = RX_Operand_Register;
 219       break;
 220     case 0:
 221       ld->rx->op[n].type = RX_Operand_Indirect;
 222       ld->rx->op[n].addend = 0;
 223       break;
 224     case 1:
 225       ld->rx->op[n].type = RX_Operand_Indirect;
 226       disp = GETBYTE ();
 227       ld->rx->op[n].addend = disp * PSCALE[size];
 228       break;
 229     case 2:
 230       ld->rx->op[n].type = RX_Operand_Indirect;
 231       disp = GETBYTE ();
 232 #if RX_OPCODE_BIG_ENDIAN
 233       disp = disp * 256 + GETBYTE ();
 234 #else
 235       disp = disp + GETBYTE () * 256;
 236 #endif
 237       ld->rx->op[n].addend = disp * PSCALE[size];
 238       break;
 239     default:
 240       abort ();
 241     }
 242 }
 243
 244 #define xO 8
 245 #define xS 4
 246 #define xZ 2
 247 #define xC 1
 248
 249 #define F_____
 250 #define F___ZC rx->flags_0 = rx->flags_s = xZ|xC;
 251 #define F__SZ_ rx->flags_0 = rx->flags_s = xS|xZ;
 252 #define F__SZC rx->flags_0 = rx->flags_s = xS|xZ|xC;
 253 #define F_0SZC rx->flags_0 = xO|xS|xZ|xC; rx->flags_s = xS|xZ|xC;
 254 #define F_O___ rx->flags_0 = rx->flags_s = xO;
 255 #define F_OS__ rx->flags_0 = rx->flags_s = xO|xS;
 256 #define F_OSZ_ rx->flags_0 = rx->flags_s = xO|xS|xZ;
 257 #define F_OSZC rx->flags_0 = rx->flags_s = xO|xS|xZ|xC;
 258
 259 int
 260 rx_decode_opcode (unsigned long pc AU,
 261                   RX_Opcode_Decoded * rx,
 262                   int (* getbyte)(void *),
 263                   void * ptr)
 264 {
 265   LocalData lds, * ld = &lds;
 266   unsigned char op[20] = {0};
 267
 268   lds.rx = rx;
 269   lds.getbyte = getbyte;
 270   lds.ptr = ptr;
 271   lds.op = op;
 272
 273   memset (rx, 0, sizeof (*rx));
 274   BWL(LSIZE);
 275
 276 /** VARY sz 00 01 10 */
 277
 278 /*----------------------------------------------------------------------*/
 279 /* MOV                                                                  */
 280
 281 /** 0111 0101 0100 rdst         mov%s   #%1, %0 */
 282   ID(mov); DR(rdst); SC(IMM (1)); F_____;
 283
 284 /** 1111 10sd rdst im sz        mov%s   #%1, %0 */
 285   ID(mov); DD(sd, rdst, sz);
 286   if ((im == 1 && sz == 0)
 287       || (im == 2 && sz == 1)
 288       || (im == 0 && sz == 2))
 289     {
 290       BWL (sz);
 291       SC(IMM(im));
 292     }
 293   else
 294     {
 295       sBWL (sz);
 296       SC(IMMex(im));
 297     }
 298    F_____;
 299
 300 /** 0110 0110 immm rdst         mov%s   #%1, %0 */
 301   ID(mov); DR(rdst); SC(immm); F_____;
 302
 303 /** 0011 11sz d dst sppp                mov%s   #%1, %0 */
 304   ID(mov); sBWL (sz); DIs(dst, d*16+sppp, sz); SC(IMM(1)); F_____;
 305
 306 /** 11sz sd ss rsrc rdst        mov%s   %1, %0 */
 307   if (sd == 3 && ss == 3 && sz == 2 && rsrc == 0 && rdst == 0)
 308     {
 309       ID(nop2);
 310       rx->syntax = "nop";
 311     }
 312   else
 313     {
 314       ID(mov); sBWL(sz); F_____;
 315       if ((ss == 3) && (sd != 3))
 316         {
 317           SD(ss, rdst, sz); DD(sd, rsrc, sz);
 318         }
 319       else
 320         {
 321           SD(ss, rsrc, sz); DD(sd, rdst, sz);
 322         }
 323     }
 324
 325 /** 10sz 1dsp a src b dst       mov%s   %1, %0 */
 326   ID(mov); sBWL(sz); DR(dst); SIs(src, dsp*4+a*2+b, sz); F_____;
 327
 328 /** 10sz 0dsp a dst b src       mov%s   %1, %0 */
 329   ID(mov); sBWL(sz); DIs(dst, dsp*4+a*2+b, sz); SR(src); F_____;
 330
 331 /** 1111 1110 01sz isrc bsrc rdst       mov%s   [%1, %2], %0 */
 332   ID(movbi); sBWL(sz); DR(rdst); SRR(isrc); S2R(bsrc); F_____;
 333
 334 /** 1111 1110 00sz isrc bsrc rdst       mov%s   %0, [%1, %2] */
 335   ID(movbir); sBWL(sz); DR(rdst); SRR(isrc); S2R(bsrc); F_____;
 336
 337 /** 1111 1110 11sz isrc bsrc rdst       movu%s  [%1, %2], %0 */
 338   ID(movbi); uBWL(sz); DR(rdst); SRR(isrc); S2R(bsrc); F_____;
 339
 340 /** 1111 1101 0010 0p sz rdst rsrc      mov%s   %1, %0 */
 341   ID(mov); sBWL (sz); SR(rsrc); F_____;
 342   OP(0, p ? RX_Operand_Predec : RX_Operand_Postinc, rdst, 0);
 343
 344 /** 1111 1101 0010 1p sz rsrc rdst      mov%s   %1, %0 */
 345   ID(mov); sBWL (sz); DR(rdst); F_____;
 346   OP(1, p ? RX_Operand_Predec : RX_Operand_Postinc, rsrc, 0);
 347
 348 /** 1011 w dsp a src b dst      movu%s  %1, %0 */
 349   ID(mov); uBWL(w); DR(dst); SIs(src, dsp*4+a*2+b, w); F_____;
 350
 351 /** 0101 1 s ss rsrc rdst       movu%s  %1, %0 */
 352   ID(mov); uBWL(s); SD(ss, rsrc, s); DR(rdst); F_____;
 353
 354 /** 1111 1101 0011 1p sz rsrc rdst      movu%s  %1, %0 */
 355   ID(mov); uBWL (sz); DR(rdst); F_____;
 356    OP(1, p ? RX_Operand_Predec : RX_Operand_Postinc, rsrc, 0);
 357
 358 /*----------------------------------------------------------------------*/
 359 /* PUSH/POP                                                             */
 360
 361 /** 0110 1111 dsta dstb         popm    %1-%2 */
 362   ID(popm); SR(dsta); S2R(dstb); F_____;
 363
 364 /** 0110 1110 dsta dstb         pushm   %1-%2 */
 365   ID(pushm); SR(dsta); S2R(dstb); F_____;
 366
 367 /** 0111 1110 1011 rdst         pop     %0 */
 368   ID(mov); OP(1, RX_Operand_Postinc, 0, 0); DR(rdst); F_____;
 369
 370 /** 0111 1110 10sz rsrc         push%s  %1 */
 371   ID(mov); BWL(sz); OP(0, RX_Operand_Predec, 0, 0); SR(rsrc); F_____;
 372
 373 /** 1111 01ss rsrc 10sz         push%s  %1 */
 374   ID(mov); BWL(sz); OP(0, RX_Operand_Predec, 0, 0); SD(ss, rsrc, sz); F_____;
 375
 376 /*----------------------------------------------------------------------*/
 377 /* XCHG                                                                 */
 378
 379 /** 1111 1100 0100 00ss rsrc rdst       xchg    %1%S1, %0 */
 380   ID(xchg); DR(rdst); SP(ss, rsrc);
 381
 382 /** 0000 0110 mx10 00ss 0001 0000 rsrc rdst     xchg    %1%S1, %0 */
 383   ID(xchg); DR(rdst); SPm(ss, rsrc, mx);
 384
 385 /*----------------------------------------------------------------------*/
 386 /* STZ/STNZ                                                             */
 387
 388 /** 1111 1101 0111 im00 1110rdst        stz     #%1, %0 */
 389   ID(stcc); SC(IMMex(im)); DR(rdst); S2cc(RXC_z);
 390
 391 /** 1111 1101 0111 im00 1111rdst        stnz    #%1, %0 */
 392   ID(stcc); SC(IMMex(im)); DR(rdst); S2cc(RXC_nz);
 393
 394 /*----------------------------------------------------------------------*/
 395 /* RTSD                                                                 */
 396
 397 /** 0110 0111                   rtsd    #%1 */
 398   ID(rtsd); SC(IMM(1) * 4);
 399
 400 /** 0011 1111 rega regb         rtsd    #%1, %2-%0 */
 401   ID(rtsd); SC(IMM(1) * 4); S2R(rega); DR(regb);
 402
 403 /*----------------------------------------------------------------------*/
 404 /* AND                                                                  */
 405
 406 /** 0110 0100 immm rdst                 and     #%1, %0 */
 407   ID(and); SC(immm); DR(rdst); F__SZ_;
 408
 409 /** 0111 01im 0010 rdst                 and     #%1, %0 */
 410   ID(and); SC(IMMex(im)); DR(rdst); F__SZ_;
 411
 412 /** 0101 00ss rsrc rdst                 and     %1%S1, %0 */
 413   ID(and); SP(ss, rsrc); DR(rdst); F__SZ_;
 414
 415 /** 0000 0110 mx01 00ss rsrc rdst       and     %1%S1, %0 */
 416   ID(and); SPm(ss, rsrc, mx); DR(rdst); F__SZ_;
 417
 418 /** 1111 1111 0100 rdst srca srcb       and     %2, %1, %0 */
 419   ID(and); DR(rdst); SR(srcb); S2R(srca); F__SZ_;
 420
 421 /*----------------------------------------------------------------------*/
 422 /* OR                                                                   */
 423
 424 /** 0110 0101 immm rdst                 or      #%1, %0 */
 425   ID(or); SC(immm); DR(rdst); F__SZ_;
 426
 427 /** 0111 01im 0011 rdst                 or      #%1, %0 */
 428   ID(or); SC(IMMex(im)); DR(rdst); F__SZ_;
 429
 430 /** 0101 01ss rsrc rdst                 or      %1%S1, %0 */
 431   ID(or); SP(ss, rsrc); DR(rdst); F__SZ_;
 432
 433 /** 0000 0110 mx01 01ss rsrc rdst                       or      %1%S1, %0 */
 434   ID(or); SPm(ss, rsrc, mx); DR(rdst); F__SZ_;
 435
 436 /** 1111 1111 0101 rdst srca srcb       or      %2, %1, %0 */
 437   ID(or); DR(rdst); SR(srcb); S2R(srca); F__SZ_;
 438
 439 /*----------------------------------------------------------------------*/
 440 /* XOR                                                                  */
 441
 442 /** 1111 1101 0111 im00 1101rdst        xor     #%1, %0 */
 443   ID(xor); SC(IMMex(im)); DR(rdst); F__SZ_;
 444
 445 /** 1111 1100 0011 01ss rsrc rdst       xor     %1%S1, %0 */
 446   ID(xor); SP(ss, rsrc); DR(rdst); F__SZ_;
 447
 448 /** 0000 0110 mx10 00ss 0000 1101 rsrc rdst     xor     %1%S1, %0 */
 449   ID(xor); SPm(ss, rsrc, mx); DR(rdst); F__SZ_;
 450
 451 /*----------------------------------------------------------------------*/
 452 /* NOT                                                                  */
 453
 454 /** 0111 1110 0000 rdst                 not     %0 */
 455   ID(xor); DR(rdst); SR(rdst); S2C(~0); F__SZ_;
 456
 457 /** 1111 1100 0011 1011 rsrc rdst       not     %1, %0 */
 458   ID(xor); DR(rdst); SR(rsrc); S2C(~0); F__SZ_;
 459
 460 /*----------------------------------------------------------------------*/
 461 /* TST                                                                  */
 462
 463 /** 1111 1101 0111 im00 1100rdst        tst     #%1, %2 */
 464   ID(and); SC(IMMex(im)); S2R(rdst); F__SZ_;
 465
 466 /** 1111 1100 0011 00ss rsrc rdst       tst     %1%S1, %2 */
 467   ID(and); SP(ss, rsrc); S2R(rdst); F__SZ_;
 468
 469 /** 0000 0110 mx10 00ss 0000 1100 rsrc rdst     tst     %1%S1, %2 */
 470   ID(and); SPm(ss, rsrc, mx); S2R(rdst); F__SZ_;
 471
 472 /*----------------------------------------------------------------------*/
 473 /* NEG                                                                  */
 474
 475 /** 0111 1110 0001 rdst                 neg     %0 */
 476   ID(sub); DR(rdst); SC(0); S2R(rdst); F_OSZC;
 477
 478 /** 1111 1100 0000 0111 rsrc rdst       neg     %2, %0 */
 479   ID(sub); DR(rdst); SC(0); S2R(rsrc); F_OSZC;
 480
 481 /*----------------------------------------------------------------------*/
 482 /* ADC                                                                  */
 483
 484 /** 1111 1101 0111 im00 0010rdst        adc     #%1, %0 */
 485   ID(adc); SC(IMMex(im)); DR(rdst); F_OSZC;
 486
 487 /** 1111 1100 0000 1011 rsrc rdst       adc     %1, %0 */
 488   ID(adc); SR(rsrc); DR(rdst); F_OSZC;
 489
 490 /** 0000 0110 1010 00ss 0000 0010 rsrc rdst     adc     %1%S1, %0 */
 491   ID(adc); SPm(ss, rsrc, 2); DR(rdst); F_OSZC;
 492
 493 /*----------------------------------------------------------------------*/
 494 /* ADD                                                                  */
 495
 496 /** 0110 0010 immm rdst                 add     #%1, %0 */
 497   ID(add); SC(immm); DR(rdst); F_OSZC;
 498
 499 /** 0100 10ss rsrc rdst                 add     %1%S1, %0 */
 500   ID(add); SP(ss, rsrc); DR(rdst); F_OSZC;
 501
 502 /** 0000 0110 mx00 10ss rsrc rdst       add     %1%S1, %0 */
 503   ID(add); SPm(ss, rsrc, mx); DR(rdst); F_OSZC;
 504
 505 /** 0111 00im rsrc rdst                 add     #%1, %2, %0 */
 506   ID(add); SC(IMMex(im)); S2R(rsrc); DR(rdst); F_OSZC;
 507
 508 /** 1111 1111 0010 rdst srca srcb       add     %2, %1, %0 */
 509   ID(add); DR(rdst); SR(srcb); S2R(srca); F_OSZC;
 510
 511 /*----------------------------------------------------------------------*/
 512 /* CMP                                                                  */
 513
 514 /** 0110 0001 immm rdst                 cmp     #%2, %1 */
 515   ID(sub); S2C(immm); SR(rdst); F_OSZC;
 516
 517 /** 0111 01im 0000 rsrc         cmp     #%2, %1%S1 */
 518   ID(sub); SR(rsrc); S2C(IMMex(im)); F_OSZC;
 519
 520 /** 0111 0101 0101 rsrc                 cmp     #%2, %1 */
 521   ID(sub); SR(rsrc); S2C(IMM(1)); F_OSZC;
 522
 523 /** 0100 01ss rsrc rdst         cmp     %2%S2, %1 */
 524   ID(sub); S2P(ss, rsrc); SR(rdst); F_OSZC;
 525
 526 /** 0000 0110 mx00 01ss rsrc rdst               cmp     %2%S2, %1 */
 527   ID(sub); S2Pm(ss, rsrc, mx); SR(rdst); F_OSZC;
 528
 529 /*----------------------------------------------------------------------*/
 530 /* SUB                                                                  */
 531
 532 /** 0110 0000 immm rdst                 sub     #%2, %0 */
 533   ID(sub); S2C(immm); SR(rdst); DR(rdst); F_OSZC;
 534
 535 /** 0100 00ss rsrc rdst                 sub     %2%S2, %1 */
 536   ID(sub); S2P(ss, rsrc); SR(rdst); DR(rdst); F_OSZC;
 537
 538 /** 0000 0110 mx00 00ss rsrc rdst                       sub     %2%S2, %1 */
 539   ID(sub); S2Pm(ss, rsrc, mx); SR(rdst); DR(rdst); F_OSZC;
 540
 541 /** 1111 1111 0000 rdst srca srcb       sub     %2, %1, %0 */
 542   ID(sub); DR(rdst); SR(srcb); S2R(srca); F_OSZC;
 543
 544 /*----------------------------------------------------------------------*/
 545 /* SBB                                                                  */
 546
 547 /** 1111 1100 0000 0011 rsrc rdst       sbb     %1, %0 */
 548   ID(sbb); SR (rsrc); DR(rdst); F_OSZC;
 549
 550   /* FIXME: only supports .L */
 551 /** 0000 0110 mx10 00sp 0000 0000 rsrc rdst     sbb     %1%S1, %0 */
 552   ID(sbb); SPm(sp, rsrc, mx); DR(rdst); F_OSZC;
 553
 554 /*----------------------------------------------------------------------*/
 555 /* ABS                                                                  */
 556
 557 /** 0111 1110 0010 rdst                 abs     %0 */
 558   ID(abs); DR(rdst); SR(rdst); F_OSZ_;
 559
 560 /** 1111 1100 0000 1111 rsrc rdst       abs     %1, %0 */
 561   ID(abs); DR(rdst); SR(rsrc); F_OSZ_;
 562
 563 /*----------------------------------------------------------------------*/
 564 /* MAX                                                                  */
 565
 566 /** 1111 1101 0111 im00 0100rdst        max     #%1, %0 */
 567   ID(max); DR(rdst); SC(IMMex(im));
 568
 569 /** 1111 1100 0001 00ss rsrc rdst       max     %1%S1, %0 */
 570   if (ss == 3 && rsrc == 0 && rdst == 0)
 571     {
 572       ID(nop3);
 573       rx->syntax = "nop";
 574     }
 575   else
 576     {
 577       ID(max); SP(ss, rsrc); DR(rdst);
 578     }
 579
 580 /** 0000 0110 mx10 00ss 0000 0100 rsrc rdst     max     %1%S1, %0 */
 581   ID(max); SPm(ss, rsrc, mx); DR(rdst);
 582
 583 /*----------------------------------------------------------------------*/
 584 /* MIN                                                                  */
 585
 586 /** 1111 1101 0111 im00 0101rdst        min     #%1, %0 */
 587   ID(min); DR(rdst); SC(IMMex(im));
 588
 589 /** 1111 1100 0001 01ss rsrc rdst       min     %1%S1, %0 */
 590   ID(min); SP(ss, rsrc); DR(rdst);
 591
 592 /** 0000 0110 mx10 00ss 0000 0101 rsrc rdst     min     %1%S1, %0 */
 593   ID(min); SPm(ss, rsrc, mx); DR(rdst);
 594
 595 /*----------------------------------------------------------------------*/
 596 /* MUL                                                                  */
 597
 598 /** 0110 0011 immm rdst                 mul     #%1, %0 */
 599   ID(mul); DR(rdst); SC(immm); F_____;
 600
 601 /** 0111 01im 0001rdst                  mul     #%1, %0 */
 602   ID(mul); DR(rdst); SC(IMMex(im)); F_____;
 603
 604 /** 0100 11ss rsrc rdst                 mul     %1%S1, %0 */
 605   ID(mul); SP(ss, rsrc); DR(rdst); F_____;
 606
 607 /** 0000 0110 mx00 11ss rsrc rdst       mul     %1%S1, %0 */
 608   ID(mul); SPm(ss, rsrc, mx); DR(rdst); F_____;
 609
 610 /** 1111 1111 0011 rdst srca srcb       mul     %2, %1, %0 */
 611   ID(mul); DR(rdst); SR(srcb); S2R(srca); F_____;
 612
 613 /*----------------------------------------------------------------------*/
 614 /* EMUL                                                                 */
 615
 616 /** 1111 1101 0111 im00 0110rdst        emul    #%1, %0 */
 617   ID(emul); DR(rdst); SC(IMMex(im));
 618
 619 /** 1111 1100 0001 10ss rsrc rdst       emul    %1%S1, %0 */
 620   ID(emul); SP(ss, rsrc); DR(rdst);
 621
 622 /** 0000 0110 mx10 00ss 0000 0110 rsrc rdst     emul    %1%S1, %0 */
 623   ID(emul); SPm(ss, rsrc, mx); DR(rdst);
 624
 625 /*----------------------------------------------------------------------*/
 626 /* EMULU                                                                        */
 627
 628 /** 1111 1101 0111 im00 0111rdst        emulu   #%1, %0 */
 629   ID(emulu); DR(rdst); SC(IMMex(im));
 630
 631 /** 1111 1100 0001 11ss rsrc rdst       emulu   %1%S1, %0 */
 632   ID(emulu); SP(ss, rsrc); DR(rdst);
 633
 634 /** 0000 0110 mx10 00ss 0000 0111 rsrc rdst     emulu   %1%S1, %0 */
 635   ID(emulu); SPm(ss, rsrc, mx); DR(rdst);
 636
 637 /*----------------------------------------------------------------------*/
 638 /* DIV                                                                  */
 639
 640 /** 1111 1101 0111 im00 1000rdst        div     #%1, %0 */
 641   ID(div); DR(rdst); SC(IMMex(im)); F_O___;
 642
 643 /** 1111 1100 0010 00ss rsrc rdst       div     %1%S1, %0 */
 644   ID(div); SP(ss, rsrc); DR(rdst); F_O___;
 645
 646 /** 0000 0110 mx10 00ss 0000 1000 rsrc rdst     div     %1%S1, %0 */
 647   ID(div); SPm(ss, rsrc, mx); DR(rdst); F_O___;
 648
 649 /*----------------------------------------------------------------------*/
 650 /* DIVU                                                                 */
 651
 652 /** 1111 1101 0111 im00 1001rdst        divu    #%1, %0 */
 653   ID(divu); DR(rdst); SC(IMMex(im)); F_O___;
 654
 655 /** 1111 1100 0010 01ss rsrc rdst       divu    %1%S1, %0 */
 656   ID(divu); SP(ss, rsrc); DR(rdst); F_O___;
 657
 658 /** 0000 0110 mx10 00ss 0000 1001 rsrc rdst     divu    %1%S1, %0 */
 659   ID(divu); SPm(ss, rsrc, mx); DR(rdst); F_O___;
 660
 661 /*----------------------------------------------------------------------*/
 662 /* SHIFT                                                                */
 663
 664 /** 0110 110i mmmm rdst                 shll    #%2, %0 */
 665   ID(shll); S2C(i*16+mmmm); SR(rdst); DR(rdst); F_OSZC;
 666
 667 /** 1111 1101 0110 0010 rsrc rdst       shll    %2, %0 */
 668   ID(shll); S2R(rsrc); SR(rdst); DR(rdst); F_OSZC;
 669
 670 /** 1111 1101 110immmm rsrc rdst        shll    #%2, %1, %0 */
 671   ID(shll); S2C(immmm); SR(rsrc); DR(rdst); F_OSZC;
 672
 673
 674 /** 0110 101i mmmm rdst                 shar    #%2, %0 */
 675   ID(shar); S2C(i*16+mmmm); SR(rdst); DR(rdst); F_0SZC;
 676
 677 /** 1111 1101 0110 0001 rsrc rdst       shar    %2, %0 */
 678   ID(shar); S2R(rsrc); SR(rdst); DR(rdst); F_0SZC;
 679
 680 /** 1111 1101 101immmm rsrc rdst        shar    #%2, %1, %0 */
 681   ID(shar); S2C(immmm); SR(rsrc); DR(rdst); F_0SZC;
 682
 683
 684 /** 0110 100i mmmm rdst                 shlr    #%2, %0 */
 685   ID(shlr); S2C(i*16+mmmm); SR(rdst); DR(rdst); F__SZC;
 686
 687 /** 1111 1101 0110 0000 rsrc rdst       shlr    %2, %0 */
 688   ID(shlr); S2R(rsrc); SR(rdst); DR(rdst); F__SZC;
 689
 690 /** 1111 1101 100immmm rsrc rdst        shlr    #%2, %1, %0 */
 691   ID(shlr); S2C(immmm); SR(rsrc); DR(rdst); F__SZC;
 692
 693 /*----------------------------------------------------------------------*/
 694 /* ROTATE                                                               */
 695
 696 /** 0111 1110 0101 rdst                 rolc    %0 */
 697   ID(rolc); DR(rdst); F__SZC;
 698
 699 /** 0111 1110 0100 rdst                 rorc    %0 */
 700   ID(rorc); DR(rdst); F__SZC;
 701
 702 /** 1111 1101 0110 111i mmmm rdst       rotl    #%1, %0 */
 703   ID(rotl); SC(i*16+mmmm); DR(rdst); F__SZC;
 704
 705 /** 1111 1101 0110 0110 rsrc rdst       rotl    %1, %0 */
 706   ID(rotl); SR(rsrc); DR(rdst); F__SZC;
 707
 708 /** 1111 1101 0110 110i mmmm rdst       rotr    #%1, %0 */
 709   ID(rotr); SC(i*16+mmmm); DR(rdst); F__SZC;
 710
 711 /** 1111 1101 0110 0100 rsrc rdst       rotr    %1, %0 */
 712   ID(rotr); SR(rsrc); DR(rdst); F__SZC;
 713
 714 /** 1111 1101 0110 0101 rsrc rdst       revw    %1, %0 */
 715   ID(revw); SR(rsrc); DR(rdst);
 716
 717 /** 1111 1101 0110 0111 rsrc rdst       revl    %1, %0 */
 718   ID(revl); SR(rsrc); DR(rdst);
 719
 720 /*----------------------------------------------------------------------*/
 721 /* BRANCH                                                               */
 722
 723 /** 0001 n dsp                  b%1.s   %a0 */
 724   ID(branch); Scc(n); DC(pc + dsp3map[dsp]);
 725
 726 /** 0010 cond                   b%1.b   %a0 */
 727   ID(branch); Scc(cond); DC(pc + IMMex (1));
 728
 729 /** 0011 101c                   b%1.w   %a0 */
 730   ID(branch); Scc(c); DC(pc + IMMex (2));
 731
 732
 733 /** 0000 1dsp                   bra.s   %a0 */
 734   ID(branch); DC(pc + dsp3map[dsp]);
 735
 736 /** 0010 1110                   bra.b   %a0 */
 737   ID(branch); DC(pc + IMMex(1));
 738
 739 /** 0011 1000                   bra.w   %a0 */
 740   ID(branch); DC(pc + IMMex(2));
 741
 742 /** 0000 0100                   bra.a   %a0 */
 743   ID(branch); DC(pc + IMMex(3));
 744
 745 /** 0111 1111 0100 rsrc         bra.l   %0 */
 746   ID(branchrel); DR(rsrc);
 747
 748
 749 /** 0111 1111 0000 rsrc         jmp     %0 */
 750   ID(branch); DR(rsrc);
 751
 752 /** 0111 1111 0001 rsrc         jsr     %0 */
 753   ID(jsr); DR(rsrc);
 754
 755 /** 0011 1001                   bsr.w   %a0 */
 756   ID(jsr); DC(pc + IMMex(2));
 757
 758 /** 0000 0101                   bsr.a   %a0 */
 759   ID(jsr); DC(pc + IMMex(3));
 760
 761 /** 0111 1111 0101 rsrc         bsr.l   %0 */
 762   ID(jsrrel); DR(rsrc);
 763
 764 /** 0000 0010                   rts */
 765   ID(rts);
 766
 767 /*----------------------------------------------------------------------*/
 768 /* NOP                                                          */
 769
 770 /** 0000 0011                   nop */
 771   ID(nop);
 772
 773 /*----------------------------------------------------------------------*/
 774 /* STRING FUNCTIONS                                                     */
 775
 776 /** 0111 1111 1000 0011         scmpu */
 777   ID(scmpu); F___ZC;
 778
 779 /** 0111 1111 1000 0111         smovu */
 780   ID(smovu);
 781
 782 /** 0111 1111 1000 1011         smovb */
 783   ID(smovb);
 784
 785 /** 0111 1111 1000 00sz         suntil%s */
 786   ID(suntil); BWL(sz); F___ZC;
 787
 788 /** 0111 1111 1000 01sz         swhile%s */
 789   ID(swhile); BWL(sz); F___ZC;
 790
 791 /** 0111 1111 1000 1111         smovf */
 792   ID(smovf);
 793
 794 /** 0111 1111 1000 10sz         sstr%s */
 795   ID(sstr); BWL(sz);
 796
 797 /*----------------------------------------------------------------------*/
 798 /* RMPA                                                                 */
 799
 800 /** 0111 1111 1000 11sz         rmpa%s */
 801   ID(rmpa); BWL(sz); F_OS__;
 802
 803 /*----------------------------------------------------------------------*/
 804 /* HI/LO stuff                                                          */
 805
 806 /** 1111 1101 0000 0000 srca srcb       mulhi   %1, %2 */
 807   ID(mulhi); SR(srca); S2R(srcb); F_____;
 808
 809 /** 1111 1101 0000 0001 srca srcb       mullo   %1, %2 */
 810   ID(mullo); SR(srca); S2R(srcb); F_____;
 811
 812 /** 1111 1101 0000 0100 srca srcb       machi   %1, %2 */
 813   ID(machi); SR(srca); S2R(srcb); F_____;
 814
 815 /** 1111 1101 0000 0101 srca srcb       maclo   %1, %2 */
 816   ID(maclo); SR(srca); S2R(srcb); F_____;
 817
 818 /** 1111 1101 0001 0111 0000 rsrc       mvtachi %1 */
 819   ID(mvtachi); SR(rsrc); F_____;
 820
 821 /** 1111 1101 0001 0111 0001 rsrc       mvtaclo %1 */
 822   ID(mvtaclo); SR(rsrc); F_____;
 823
 824 /** 1111 1101 0001 1111 0000 rdst       mvfachi %0 */
 825   ID(mvfachi); DR(rdst); F_____;
 826
 827 /** 1111 1101 0001 1111 0010 rdst       mvfacmi %0 */
 828   ID(mvfacmi); DR(rdst); F_____;
 829
 830 /** 1111 1101 0001 1111 0001 rdst       mvfaclo %0 */
 831   ID(mvfaclo); DR(rdst); F_____;
 832
 833 /** 1111 1101 0001 1000 000i 0000       racw    #%1 */
 834   ID(racw); SC(i+1); F_____;
 835
 836 /*----------------------------------------------------------------------*/
 837 /* SAT                                                                  */
 838
 839 /** 0111 1110 0011 rdst         sat     %0 */
 840   ID(sat); DR (rdst);
 841
 842 /** 0111 1111 1001 0011         satr */
 843   ID(satr);
 844
 845 /*----------------------------------------------------------------------*/
 846 /* FLOAT                                                                */
 847
 848 /** 1111 1101 0111 0010 0010 rdst       fadd    #%1, %0 */
 849   ID(fadd); DR(rdst); SC(IMM(0)); F__SZ_;
 850
 851 /** 1111 1100 1000 10sd rsrc rdst       fadd    %1%S1, %0 */
 852   ID(fadd); DR(rdst); SD(sd, rsrc, LSIZE); F__SZ_;
 853
 854 /** 1111 1101 0111 0010 0001 rdst       fcmp    #%1, %0 */
 855   ID(fcmp); DR(rdst); SC(IMM(0)); F_OSZ_;
 856
 857 /** 1111 1100 1000 01sd rsrc rdst       fcmp    %1%S1, %0 */
 858   ID(fcmp); DR(rdst); SD(sd, rsrc, LSIZE); F_OSZ_;
 859
 860 /** 1111 1101 0111 0010 0000 rdst       fsub    #%1, %0 */
 861   ID(fsub); DR(rdst); SC(IMM(0)); F__SZ_;
 862
 863 /** 1111 1100 1000 00sd rsrc rdst       fsub    %1%S1, %0 */
 864   ID(fsub); DR(rdst); SD(sd, rsrc, LSIZE); F__SZ_;
 865
 866 /** 1111 1100 1001 01sd rsrc rdst       ftoi    %1%S1, %0 */
 867   ID(ftoi); DR(rdst); SD(sd, rsrc, LSIZE); F__SZ_;
 868
 869 /** 1111 1101 0111 0010 0011 rdst       fmul    #%1, %0 */
 870   ID(fmul); DR(rdst); SC(IMM(0)); F__SZ_;
 871
 872 /** 1111 1100 1000 11sd rsrc rdst       fmul    %1%S1, %0 */
 873   ID(fmul); DR(rdst); SD(sd, rsrc, LSIZE); F__SZ_;
 874
 875 /** 1111 1101 0111 0010 0100 rdst       fdiv    #%1, %0 */
 876   ID(fdiv); DR(rdst); SC(IMM(0)); F__SZ_;
 877
 878 /** 1111 1100 1001 00sd rsrc rdst       fdiv    %1%S1, %0 */
 879   ID(fdiv); DR(rdst); SD(sd, rsrc, LSIZE); F__SZ_;
 880
 881 /** 1111 1100 1001 10sd rsrc rdst       round   %1%S1, %0 */
 882   ID(round); DR(rdst); SD(sd, rsrc, LSIZE); F__SZ_;
 883
 884 /** 1111 1100 0100 01sd rsrc rdst       itof    %1%S1, %0 */
 885   ID(itof); DR (rdst); SP(sd, rsrc); F__SZ_;
 886
 887 /** 0000 0110 mx10 00sd 0001 0001 rsrc rdst     itof    %1%S1, %0 */
 888   ID(itof); DR (rdst); SPm(sd, rsrc, mx); F__SZ_;
 889
 890 /*----------------------------------------------------------------------*/
 891 /* BIT OPS                                                              */
 892
 893 /** 1111 00sd rdst 0bit                 bset    #%1, %0%S0 */
 894   ID(bset); BWL(BSIZE); SC(bit); DD(sd, rdst, BSIZE); F_____;
 895
 896 /** 1111 1100 0110 00sd rdst rsrc       bset    %1, %0%S0 */
 897   ID(bset); BWL(BSIZE); SR(rsrc); DD(sd, rdst, BSIZE); F_____;
 898   if (sd == 3) /* bset reg,reg */
 899     BWL(LSIZE);
 900
 901 /** 0111 100b ittt rdst                 bset    #%1, %0 */
 902   ID(bset); BWL(LSIZE); SC(b*16+ittt); DR(rdst); F_____;
 903
 904
 905 /** 1111 00sd rdst 1bit                 bclr    #%1, %0%S0 */
 906   ID(bclr); BWL(BSIZE); SC(bit); DD(sd, rdst, BSIZE); F_____;
 907
 908 /** 1111 1100 0110 01sd rdst rsrc       bclr    %1, %0%S0 */
 909   ID(bclr); BWL(BSIZE); SR(rsrc); DD(sd, rdst, BSIZE); F_____;
 910   if (sd == 3) /* bset reg,reg */
 911     BWL(LSIZE);
 912
 913 /** 0111 101b ittt rdst                 bclr    #%1, %0 */
 914   ID(bclr); BWL(LSIZE); SC(b*16+ittt); DR(rdst); F_____;
 915
 916
 917 /** 1111 01sd rdst 0bit                 btst    #%2, %1%S1 */
 918   ID(btst); BWL(BSIZE); S2C(bit); SD(sd, rdst, BSIZE); F___ZC;
 919
 920 /** 1111 1100 0110 10sd rdst rsrc       btst    %2, %1%S1 */
 921   ID(btst); BWL(BSIZE); S2R(rsrc); SD(sd, rdst, BSIZE); F___ZC;
 922   if (sd == 3) /* bset reg,reg */
 923     BWL(LSIZE);
 924
 925 /** 0111 110b ittt rdst                 btst    #%2, %1 */
 926   ID(btst); BWL(LSIZE); S2C(b*16+ittt); SR(rdst); F___ZC;
 927
 928
 929 /** 1111 1100 111bit sd rdst 1111       bnot    #%1, %0%S0 */
 930   ID(bnot); BWL(BSIZE); SC(bit); DD(sd, rdst, BSIZE);
 931
 932 /** 1111 1100 0110 11sd rdst rsrc       bnot    %1, %0%S0 */
 933   ID(bnot); BWL(BSIZE); SR(rsrc); DD(sd, rdst, BSIZE);
 934   if (sd == 3) /* bset reg,reg */
 935     BWL(LSIZE);
 936
 937 /** 1111 1101 111bittt 1111 rdst        bnot    #%1, %0 */
 938   ID(bnot); BWL(LSIZE); SC(bittt); DR(rdst);
 939
 940
 941 /** 1111 1100 111bit sd rdst cond       bm%2    #%1, %0%S0 */
 942   ID(bmcc); BWL(BSIZE); S2cc(cond); SC(bit); DD(sd, rdst, BSIZE);
 943
 944 /** 1111 1101 111 bittt cond rdst       bm%2    #%1, %0%S0 */
 945   ID(bmcc); BWL(LSIZE); S2cc(cond); SC(bittt); DR(rdst);
 946
 947 /*----------------------------------------------------------------------*/
 948 /* CONTROL REGISTERS                                                    */
 949
 950 /** 0111 1111 1011 rdst                 clrpsw  %0 */
 951   ID(clrpsw); DF(rdst);
 952
 953 /** 0111 1111 1010 rdst                 setpsw  %0 */
 954   ID(setpsw); DF(rdst);
 955
 956 /** 0111 0101 0111 0000 0000 immm       mvtipl  #%1 */
 957   ID(mvtipl); SC(immm);
 958
 959 /** 0111 1110 111 crdst                 popc    %0 */
 960   ID(mov); OP(1, RX_Operand_Postinc, 0, 0); DR(crdst + 16);
 961
 962 /** 0111 1110 110 crsrc                 pushc   %1 */
 963   ID(mov); OP(0, RX_Operand_Predec, 0, 0); SR(crsrc + 16);
 964
 965 /** 1111 1101 0111 im11 000crdst        mvtc    #%1, %0 */
 966   ID(mov); SC(IMMex(im)); DR(crdst + 16);
 967
 968 /** 1111 1101 0110 100c rsrc rdst       mvtc    %1, %0 */
 969   ID(mov); SR(rsrc); DR(c*16+rdst + 16);
 970
 971 /** 1111 1101 0110 101s rsrc rdst       mvfc    %1, %0 */
 972   ID(mov); SR((s*16+rsrc) + 16); DR(rdst);
 973
 974 /*----------------------------------------------------------------------*/
 975 /* INTERRUPTS                                                           */
 976
 977 /** 0111 1111 1001 0100         rtfi */
 978   ID(rtfi);
 979
 980 /** 0111 1111 1001 0101         rte */
 981   ID(rte);
 982
 983 /** 0000 0000                   brk */
 984   ID(brk);
 985
 986 /** 0000 0001                   dbt */
 987   ID(dbt);
 988
 989 /** 0111 0101 0110 0000         int #%1 */
 990   ID(int); SC(IMM(1));
 991
 992 /** 0111 1111 1001 0110         wait */
 993   ID(wait);
 994
 995 /*----------------------------------------------------------------------*/
 996 /* SCcnd                                                                */
 997
 998 /** 1111 1100 1101 sz sd rdst cond      sc%1%s  %0 */
 999   ID(sccnd); BWL(sz); DD (sd, rdst, sz); Scc(cond);
1000
1001 /** */
1002
1003   return rx->n_bytes;
1004 }