opcodes/i386-opc.h

   1 /* Declarations for Intel 80386 opcode table
   2    Copyright 2007, 2008, 2009, 2010, 2012
   3    Free Software Foundation, Inc.
   4
   5    This file is part of the GNU opcodes library.
   6
   7    This library is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    It is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #include "opcode/i386.h"
  23 #ifdef HAVE_LIMITS_H
  24 #include <limits.h>
  25 #endif
  26
  27 #ifndef CHAR_BIT
  28 #define CHAR_BIT 8
  29 #endif
  30
  31 /* Position of cpu flags bitfiled.  */
  32
  33 enum
  34 {
  35   /* i186 or better required */
  36   Cpu186 = 0,
  37   /* i286 or better required */
  38   Cpu286,
  39   /* i386 or better required */
  40   Cpu386,
  41   /* i486 or better required */
  42   Cpu486,
  43   /* i585 or better required */
  44   Cpu586,
  45   /* i686 or better required */
  46   Cpu686,
  47   /* CLFLUSH Instruction support required */
  48   CpuClflush,
  49   /* NOP Instruction support required */
  50   CpuNop,
  51   /* SYSCALL Instructions support required */
  52   CpuSYSCALL,
  53   /* Floating point support required */
  54   Cpu8087,
  55   /* i287 support required */
  56   Cpu287,
  57   /* i387 support required */
  58   Cpu387,
  59   /* i686 and floating point support required */
  60   Cpu687,
  61   /* SSE3 and floating point support required */
  62   CpuFISTTP,
  63   /* MMX support required */
  64   CpuMMX,
  65   /* SSE support required */
  66   CpuSSE,
  67   /* SSE2 support required */
  68   CpuSSE2,
  69   /* 3dnow! support required */
  70   Cpu3dnow,
  71   /* 3dnow! Extensions support required */
  72   Cpu3dnowA,
  73   /* SSE3 support required */
  74   CpuSSE3,
  75   /* VIA PadLock required */
  76   CpuPadLock,
  77   /* AMD Secure Virtual Machine Ext-s required */
  78   CpuSVME,
  79   /* VMX Instructions required */
  80   CpuVMX,
  81   /* SMX Instructions required */
  82   CpuSMX,
  83   /* SSSE3 support required */
  84   CpuSSSE3,
  85   /* SSE4a support required */
  86   CpuSSE4a,
  87   /* ABM New Instructions required */
  88   CpuABM,
  89   /* SSE4.1 support required */
  90   CpuSSE4_1,
  91   /* SSE4.2 support required */
  92   CpuSSE4_2,
  93   /* AVX support required */
  94   CpuAVX,
  95   /* AVX2 support required */
  96   CpuAVX2,
  97   /* Intel L1OM support required */
  98   CpuL1OM,
  99   /* Intel K1OM support required */
 100   CpuK1OM,
 101   /* Xsave/xrstor New Instructions support required */
 102   CpuXsave,
 103   /* Xsaveopt New Instructions support required */
 104   CpuXsaveopt,
 105   /* AES support required */
 106   CpuAES,
 107   /* PCLMUL support required */
 108   CpuPCLMUL,
 109   /* FMA support required */
 110   CpuFMA,
 111   /* FMA4 support required */
 112   CpuFMA4,
 113   /* XOP support required */
 114   CpuXOP,
 115   /* LWP support required */
 116   CpuLWP,
 117   /* BMI support required */
 118   CpuBMI,
 119   /* TBM support required */
 120   CpuTBM,
 121   /* MOVBE Instruction support required */
 122   CpuMovbe,
 123   /* CMPXCHG16B instruction support required.  */
 124   CpuCX16,
 125   /* EPT Instructions required */
 126   CpuEPT,
 127   /* RDTSCP Instruction support required */
 128   CpuRdtscp,
 129   /* FSGSBASE Instructions required */
 130   CpuFSGSBase,
 131   /* RDRND Instructions required */
 132   CpuRdRnd,
 133   /* F16C Instructions required */
 134   CpuF16C,
 135   /* Intel BMI2 support required */
 136   CpuBMI2,
 137   /* LZCNT support required */
 138   CpuLZCNT,
 139   /* HLE support required */
 140   CpuHLE,
 141   /* RTM support required */
 142   CpuRTM,
 143   /* INVPCID Instructions required */
 144   CpuINVPCID,
 145   /* VMFUNC Instruction required */
 146   CpuVMFUNC,
 147   /* 64bit support available, used by -march= in assembler.  */
 148   CpuLM,
 149   /* RDRSEED instruction required.  */
 150   CpuRDSEED,
 151   /* Multi-presisionn add-carry instructions are required.  */
 152   CpuADX,
 153   /* Supports prefetchw and prefetch instructions.  */
 154   CpuPRFCHW,
 155   /* SMAP instructions required.  */
 156   CpuSMAP,
 157   /* 64bit support required  */
 158   Cpu64,
 159   /* Not supported in the 64bit mode  */
 160   CpuNo64,
 161   /* The last bitfield in i386_cpu_flags.  */
 162   CpuMax = CpuNo64
 163 };
 164
 165 #define CpuNumOfUints \
 166   (CpuMax / sizeof (unsigned int) / CHAR_BIT + 1)
 167 #define CpuNumOfBits \
 168   (CpuNumOfUints * sizeof (unsigned int) * CHAR_BIT)
 169
 170 /* If you get a compiler error for zero width of the unused field,
 171    comment it out.  */
 172 #define CpuUnused       (CpuMax + 1)
 173
 174 /* We can check if an instruction is available with array instead
 175    of bitfield. */
 176 typedef union i386_cpu_flags
 177 {
 178   struct
 179     {
 180       unsigned int cpui186:1;
 181       unsigned int cpui286:1;
 182       unsigned int cpui386:1;
 183       unsigned int cpui486:1;
 184       unsigned int cpui586:1;
 185       unsigned int cpui686:1;
 186       unsigned int cpuclflush:1;
 187       unsigned int cpunop:1;
 188       unsigned int cpusyscall:1;
 189       unsigned int cpu8087:1;
 190       unsigned int cpu287:1;
 191       unsigned int cpu387:1;
 192       unsigned int cpu687:1;
 193       unsigned int cpufisttp:1;
 194       unsigned int cpummx:1;
 195       unsigned int cpusse:1;
 196       unsigned int cpusse2:1;
 197       unsigned int cpua3dnow:1;
 198       unsigned int cpua3dnowa:1;
 199       unsigned int cpusse3:1;
 200       unsigned int cpupadlock:1;
 201       unsigned int cpusvme:1;
 202       unsigned int cpuvmx:1;
 203       unsigned int cpusmx:1;
 204       unsigned int cpussse3:1;
 205       unsigned int cpusse4a:1;
 206       unsigned int cpuabm:1;
 207       unsigned int cpusse4_1:1;
 208       unsigned int cpusse4_2:1;
 209       unsigned int cpuavx:1;
 210       unsigned int cpuavx2:1;
 211       unsigned int cpul1om:1;
 212       unsigned int cpuk1om:1;
 213       unsigned int cpuxsave:1;
 214       unsigned int cpuxsaveopt:1;
 215       unsigned int cpuaes:1;
 216       unsigned int cpupclmul:1;
 217       unsigned int cpufma:1;
 218       unsigned int cpufma4:1;
 219       unsigned int cpuxop:1;
 220       unsigned int cpulwp:1;
 221       unsigned int cpubmi:1;
 222       unsigned int cputbm:1;
 223       unsigned int cpumovbe:1;
 224       unsigned int cpucx16:1;
 225       unsigned int cpuept:1;
 226       unsigned int cpurdtscp:1;
 227       unsigned int cpufsgsbase:1;
 228       unsigned int cpurdrnd:1;
 229       unsigned int cpuf16c:1;
 230       unsigned int cpubmi2:1;
 231       unsigned int cpulzcnt:1;
 232       unsigned int cpuhle:1;
 233       unsigned int cpurtm:1;
 234       unsigned int cpuinvpcid:1;
 235       unsigned int cpuvmfunc:1;
 236       unsigned int cpulm:1;
 237       unsigned int cpurdseed:1;
 238       unsigned int cpuadx:1;
 239       unsigned int cpuprfchw:1;
 240       unsigned int cpusmap:1;
 241       unsigned int cpu64:1;
 242       unsigned int cpuno64:1;
 243 #ifdef CpuUnused
 244       unsigned int unused:(CpuNumOfBits - CpuUnused);
 245 #endif
 246     } bitfield;
 247   unsigned int array[CpuNumOfUints];
 248 } i386_cpu_flags;
 249
 250 /* Position of opcode_modifier bits.  */
 251
 252 enum
 253 {
 254   /* has direction bit. */
 255   D = 0,
 256   /* set if operands can be words or dwords encoded the canonical way */
 257   W,
 258   /* Skip the current insn and use the next insn in i386-opc.tbl to swap
 259      operand in encoding.  */
 260   S,
 261   /* insn has a modrm byte. */
 262   Modrm,
 263   /* register is in low 3 bits of opcode */
 264   ShortForm,
 265   /* special case for jump insns.  */
 266   Jump,
 267   /* call and jump */
 268   JumpDword,
 269   /* loop and jecxz */
 270   JumpByte,
 271   /* special case for intersegment leaps/calls */
 272   JumpInterSegment,
 273   /* FP insn memory format bit, sized by 0x4 */
 274   FloatMF,
 275   /* src/dest swap for floats. */
 276   FloatR,
 277   /* has float insn direction bit. */
 278   FloatD,
 279   /* needs size prefix if in 32-bit mode */
 280   Size16,
 281   /* needs size prefix if in 16-bit mode */
 282   Size32,
 283   /* needs size prefix if in 64-bit mode */
 284   Size64,
 285   /* check register size.  */
 286   CheckRegSize,
 287   /* instruction ignores operand size prefix and in Intel mode ignores
 288      mnemonic size suffix check.  */
 289   IgnoreSize,
 290   /* default insn size depends on mode */
 291   DefaultSize,
 292   /* b suffix on instruction illegal */
 293   No_bSuf,
 294   /* w suffix on instruction illegal */
 295   No_wSuf,
 296   /* l suffix on instruction illegal */
 297   No_lSuf,
 298   /* s suffix on instruction illegal */
 299   No_sSuf,
 300   /* q suffix on instruction illegal */
 301   No_qSuf,
 302   /* long double suffix on instruction illegal */
 303   No_ldSuf,
 304   /* instruction needs FWAIT */
 305   FWait,
 306   /* quick test for string instructions */
 307   IsString,
 308   /* quick test for lockable instructions */
 309   IsLockable,
 310   /* fake an extra reg operand for clr, imul and special register
 311      processing for some instructions.  */
 312   RegKludge,
 313   /* The first operand must be xmm0 */
 314   FirstXmm0,
 315   /* An implicit xmm0 as the first operand */
 316   Implicit1stXmm0,
 317   /* The HLE prefix is OK:
 318      1. With a LOCK prefix.
 319      2. With or without a LOCK prefix.
 320      3. With a RELEASE (0xf3) prefix.
 321    */
 322 #define HLEPrefixNone           0
 323 #define HLEPrefixLock           1
 324 #define HLEPrefixAny            2
 325 #define HLEPrefixRelease        3
 326   HLEPrefixOk,
 327   /* An instruction on which a "rep" prefix is acceptable.  */
 328   RepPrefixOk,
 329   /* Convert to DWORD */
 330   ToDword,
 331   /* Convert to QWORD */
 332   ToQword,
 333   /* Address prefix changes operand 0 */
 334   AddrPrefixOp0,
 335   /* opcode is a prefix */
 336   IsPrefix,
 337   /* instruction has extension in 8 bit imm */
 338   ImmExt,
 339   /* instruction don't need Rex64 prefix.  */
 340   NoRex64,
 341   /* instruction require Rex64 prefix.  */
 342   Rex64,
 343   /* deprecated fp insn, gets a warning */
 344   Ugh,
 345   /* insn has VEX prefix:
 346         1: 128bit VEX prefix.
 347         2: 256bit VEX prefix.
 348         3: Scalar VEX prefix.
 349    */
 350 #define VEX128          1
 351 #define VEX256          2
 352 #define VEXScalar       3
 353   Vex,
 354   /* How to encode VEX.vvvv:
 355      0: VEX.vvvv must be 1111b.
 356      1: VEX.NDS.  Register-only source is encoded in VEX.vvvv where
 357         the content of source registers will be preserved.
 358         VEX.DDS.  The second register operand is encoded in VEX.vvvv
 359         where the content of first source register will be overwritten
 360         by the result.
 361         VEX.NDD2.  The second destination register operand is encoded in
 362         VEX.vvvv for instructions with 2 destination register operands.
 363         For assembler, there are no difference between VEX.NDS, VEX.DDS
 364         and VEX.NDD2.
 365      2. VEX.NDD.  Register destination is encoded in VEX.vvvv for
 366      instructions with 1 destination register operand.
 367      3. VEX.LWP.  Register destination is encoded in VEX.vvvv and one
 368         of the operands can access a memory location.
 369    */
 370 #define VEXXDS  1
 371 #define VEXNDD  2
 372 #define VEXLWP  3
 373   VexVVVV,
 374   /* How the VEX.W bit is used:
 375      0: Set by the REX.W bit.
 376      1: VEX.W0.  Should always be 0.
 377      2: VEX.W1.  Should always be 1.
 378    */
 379 #define VEXW0   1
 380 #define VEXW1   2
 381   VexW,
 382   /* VEX opcode prefix:
 383      0: VEX 0x0F opcode prefix.
 384      1: VEX 0x0F38 opcode prefix.
 385      2: VEX 0x0F3A opcode prefix
 386      3: XOP 0x08 opcode prefix.
 387      4: XOP 0x09 opcode prefix
 388      5: XOP 0x0A opcode prefix.
 389    */
 390 #define VEX0F           0
 391 #define VEX0F38         1
 392 #define VEX0F3A         2
 393 #define XOP08           3
 394 #define XOP09           4
 395 #define XOP0A           5
 396   VexOpcode,
 397   /* number of VEX source operands:
 398      0: <= 2 source operands.
 399      1: 2 XOP source operands.
 400      2: 3 source operands.
 401    */
 402 #define XOP2SOURCES     1
 403 #define VEX3SOURCES     2
 404   VexSources,
 405   /* instruction has VEX 8 bit imm */
 406   VexImmExt,
 407   /* Instruction with vector SIB byte:
 408         1: 128bit vector register.
 409         2: 256bit vector register.
 410    */
 411 #define VecSIB128       1
 412 #define VecSIB256       2
 413   VecSIB,
 414   /* SSE to AVX support required */
 415   SSE2AVX,
 416   /* No AVX equivalent */
 417   NoAVX,
 418   /* Compatible with old (<= 2.8.1) versions of gcc  */
 419   OldGcc,
 420   /* AT&T mnemonic.  */
 421   ATTMnemonic,
 422   /* AT&T syntax.  */
 423   ATTSyntax,
 424   /* Intel syntax.  */
 425   IntelSyntax,
 426   /* The last bitfield in i386_opcode_modifier.  */
 427   Opcode_Modifier_Max
 428 };
 429
 430 typedef struct i386_opcode_modifier
 431 {
 432   unsigned int d:1;
 433   unsigned int w:1;
 434   unsigned int s:1;
 435   unsigned int modrm:1;
 436   unsigned int shortform:1;
 437   unsigned int jump:1;
 438   unsigned int jumpdword:1;
 439   unsigned int jumpbyte:1;
 440   unsigned int jumpintersegment:1;
 441   unsigned int floatmf:1;
 442   unsigned int floatr:1;
 443   unsigned int floatd:1;
 444   unsigned int size16:1;
 445   unsigned int size32:1;
 446   unsigned int size64:1;
 447   unsigned int checkregsize:1;
 448   unsigned int ignoresize:1;
 449   unsigned int defaultsize:1;
 450   unsigned int no_bsuf:1;
 451   unsigned int no_wsuf:1;
 452   unsigned int no_lsuf:1;
 453   unsigned int no_ssuf:1;
 454   unsigned int no_qsuf:1;
 455   unsigned int no_ldsuf:1;
 456   unsigned int fwait:1;
 457   unsigned int isstring:1;
 458   unsigned int islockable:1;
 459   unsigned int regkludge:1;
 460   unsigned int firstxmm0:1;
 461   unsigned int implicit1stxmm0:1;
 462   unsigned int hleprefixok:2;
 463   unsigned int repprefixok:1;
 464   unsigned int todword:1;
 465   unsigned int toqword:1;
 466   unsigned int addrprefixop0:1;
 467   unsigned int isprefix:1;
 468   unsigned int immext:1;
 469   unsigned int norex64:1;
 470   unsigned int rex64:1;
 471   unsigned int ugh:1;
 472   unsigned int vex:2;
 473   unsigned int vexvvvv:2;
 474   unsigned int vexw:2;
 475   unsigned int vexopcode:3;
 476   unsigned int vexsources:2;
 477   unsigned int veximmext:1;
 478   unsigned int vecsib:2;
 479   unsigned int sse2avx:1;
 480   unsigned int noavx:1;
 481   unsigned int oldgcc:1;
 482   unsigned int attmnemonic:1;
 483   unsigned int attsyntax:1;
 484   unsigned int intelsyntax:1;
 485 } i386_opcode_modifier;
 486
 487 /* Position of operand_type bits.  */
 488
 489 enum
 490 {
 491   /* 8bit register */
 492   Reg8 = 0,
 493   /* 16bit register */
 494   Reg16,
 495   /* 32bit register */
 496   Reg32,
 497   /* 64bit register */
 498   Reg64,
 499   /* Floating pointer stack register */
 500   FloatReg,
 501   /* MMX register */
 502   RegMMX,
 503   /* SSE register */
 504   RegXMM,
 505   /* AVX registers */
 506   RegYMM,
 507   /* Control register */
 508   Control,
 509   /* Debug register */
 510   Debug,
 511   /* Test register */
 512   Test,
 513   /* 2 bit segment register */
 514   SReg2,
 515   /* 3 bit segment register */
 516   SReg3,
 517   /* 1 bit immediate */
 518   Imm1,
 519   /* 8 bit immediate */
 520   Imm8,
 521   /* 8 bit immediate sign extended */
 522   Imm8S,
 523   /* 16 bit immediate */
 524   Imm16,
 525   /* 32 bit immediate */
 526   Imm32,
 527   /* 32 bit immediate sign extended */
 528   Imm32S,
 529   /* 64 bit immediate */
 530   Imm64,
 531   /* 8bit/16bit/32bit displacements are used in different ways,
 532      depending on the instruction.  For jumps, they specify the
 533      size of the PC relative displacement, for instructions with
 534      memory operand, they specify the size of the offset relative
 535      to the base register, and for instructions with memory offset
 536      such as `mov 1234,%al' they specify the size of the offset
 537      relative to the segment base.  */
 538   /* 8 bit displacement */
 539   Disp8,
 540   /* 16 bit displacement */
 541   Disp16,
 542   /* 32 bit displacement */
 543   Disp32,
 544   /* 32 bit signed displacement */
 545   Disp32S,
 546   /* 64 bit displacement */
 547   Disp64,
 548   /* Accumulator %al/%ax/%eax/%rax */
 549   Acc,
 550   /* Floating pointer top stack register %st(0) */
 551   FloatAcc,
 552   /* Register which can be used for base or index in memory operand.  */
 553   BaseIndex,
 554   /* Register to hold in/out port addr = dx */
 555   InOutPortReg,
 556   /* Register to hold shift count = cl */
 557   ShiftCount,
 558   /* Absolute address for jump.  */
 559   JumpAbsolute,
 560   /* String insn operand with fixed es segment */
 561   EsSeg,
 562   /* RegMem is for instructions with a modrm byte where the register
 563      destination operand should be encoded in the mod and regmem fields.
 564      Normally, it will be encoded in the reg field. We add a RegMem
 565      flag to the destination register operand to indicate that it should
 566      be encoded in the regmem field.  */
 567   RegMem,
 568   /* Memory.  */
 569   Mem,
 570   /* BYTE memory. */
 571   Byte,
 572   /* WORD memory. 2 byte */
 573   Word,
 574   /* DWORD memory. 4 byte */
 575   Dword,
 576   /* FWORD memory. 6 byte */
 577   Fword,
 578   /* QWORD memory. 8 byte */
 579   Qword,
 580   /* TBYTE memory. 10 byte */
 581   Tbyte,
 582   /* XMMWORD memory. */
 583   Xmmword,
 584   /* YMMWORD memory. */
 585   Ymmword,
 586   /* Unspecified memory size.  */
 587   Unspecified,
 588   /* Any memory size.  */
 589   Anysize,
 590
 591   /* Vector 4 bit immediate.  */
 592   Vec_Imm4,
 593
 594   /* The last bitfield in i386_operand_type.  */
 595   OTMax
 596 };
 597
 598 #define OTNumOfUints \
 599   (OTMax / sizeof (unsigned int) / CHAR_BIT + 1)
 600 #define OTNumOfBits \
 601   (OTNumOfUints * sizeof (unsigned int) * CHAR_BIT)
 602
 603 /* If you get a compiler error for zero width of the unused field,
 604    comment it out.  */
 605 #define OTUnused                (OTMax + 1)
 606
 607 typedef union i386_operand_type
 608 {
 609   struct
 610     {
 611       unsigned int reg8:1;
 612       unsigned int reg16:1;
 613       unsigned int reg32:1;
 614       unsigned int reg64:1;
 615       unsigned int floatreg:1;
 616       unsigned int regmmx:1;
 617       unsigned int regxmm:1;
 618       unsigned int regymm:1;
 619       unsigned int control:1;
 620       unsigned int debug:1;
 621       unsigned int test:1;
 622       unsigned int sreg2:1;
 623       unsigned int sreg3:1;
 624       unsigned int imm1:1;
 625       unsigned int imm8:1;
 626       unsigned int imm8s:1;
 627       unsigned int imm16:1;
 628       unsigned int imm32:1;
 629       unsigned int imm32s:1;
 630       unsigned int imm64:1;
 631       unsigned int disp8:1;
 632       unsigned int disp16:1;
 633       unsigned int disp32:1;
 634       unsigned int disp32s:1;
 635       unsigned int disp64:1;
 636       unsigned int acc:1;
 637       unsigned int floatacc:1;
 638       unsigned int baseindex:1;
 639       unsigned int inoutportreg:1;
 640       unsigned int shiftcount:1;
 641       unsigned int jumpabsolute:1;
 642       unsigned int esseg:1;
 643       unsigned int regmem:1;
 644       unsigned int mem:1;
 645       unsigned int byte:1;
 646       unsigned int word:1;
 647       unsigned int dword:1;
 648       unsigned int fword:1;
 649       unsigned int qword:1;
 650       unsigned int tbyte:1;
 651       unsigned int xmmword:1;
 652       unsigned int ymmword:1;
 653       unsigned int unspecified:1;
 654       unsigned int anysize:1;
 655       unsigned int vec_imm4:1;
 656 #ifdef OTUnused
 657       unsigned int unused:(OTNumOfBits - OTUnused);
 658 #endif
 659     } bitfield;
 660   unsigned int array[OTNumOfUints];
 661 } i386_operand_type;
 662
 663 typedef struct insn_template
 664 {
 665   /* instruction name sans width suffix ("mov" for movl insns) */
 666   char *name;
 667
 668   /* how many operands */
 669   unsigned int operands;
 670
 671   /* base_opcode is the fundamental opcode byte without optional
 672      prefix(es).  */
 673   unsigned int base_opcode;
 674 #define Opcode_D        0x2 /* Direction bit:
 675                                set if Reg --> Regmem;
 676                                unset if Regmem --> Reg. */
 677 #define Opcode_FloatR   0x8 /* Bit to swap src/dest for float insns. */
 678 #define Opcode_FloatD 0x400 /* Direction bit for float insns. */
 679
 680   /* extension_opcode is the 3 bit extension for group <n> insns.
 681      This field is also used to store the 8-bit opcode suffix for the
 682      AMD 3DNow! instructions.
 683      If this template has no extension opcode (the usual case) use None
 684      Instructions */
 685   unsigned int extension_opcode;
 686 #define None 0xffff             /* If no extension_opcode is possible.  */
 687
 688   /* Opcode length.  */
 689   unsigned char opcode_length;
 690
 691   /* cpu feature flags */
 692   i386_cpu_flags cpu_flags;
 693
 694   /* the bits in opcode_modifier are used to generate the final opcode from
 695      the base_opcode.  These bits also are used to detect alternate forms of
 696      the same instruction */
 697   i386_opcode_modifier opcode_modifier;
 698
 699   /* operand_types[i] describes the type of operand i.  This is made
 700      by OR'ing together all of the possible type masks.  (e.g.
 701      'operand_types[i] = Reg|Imm' specifies that operand i can be
 702      either a register or an immediate operand.  */
 703   i386_operand_type operand_types[MAX_OPERANDS];
 704 }
 705 insn_template;
 706
 707 extern const insn_template i386_optab[];
 708
 709 /* these are for register name --> number & type hash lookup */
 710 typedef struct
 711 {
 712   char *reg_name;
 713   i386_operand_type reg_type;
 714   unsigned char reg_flags;
 715 #define RegRex      0x1  /* Extended register.  */
 716 #define RegRex64    0x2  /* Extended 8 bit register.  */
 717   unsigned char reg_num;
 718 #define RegRip  ((unsigned char ) ~0)
 719 #define RegEip  (RegRip - 1)
 720 /* EIZ and RIZ are fake index registers.  */
 721 #define RegEiz  (RegEip - 1)
 722 #define RegRiz  (RegEiz - 1)
 723 /* FLAT is a fake segment register (Intel mode).  */
 724 #define RegFlat     ((unsigned char) ~0)
 725   signed char dw2_regnum[2];
 726 #define Dw2Inval (-1)
 727 }
 728 reg_entry;
 729
 730 /* Entries in i386_regtab.  */
 731 #define REGNAM_AL 1
 732 #define REGNAM_AX 25
 733 #define REGNAM_EAX 41
 734
 735 extern const reg_entry i386_regtab[];
 736 extern const unsigned int i386_regtab_size;
 737
 738 typedef struct
 739 {
 740   char *seg_name;
 741   unsigned int seg_prefix;
 742 }
 743 seg_entry;
 744
 745 extern const seg_entry cs;
 746 extern const seg_entry ds;
 747 extern const seg_entry ss;
 748 extern const seg_entry es;
 749 extern const seg_entry fs;
 750 extern const seg_entry gs;