LLVM  8.0.0svn
X86BaseInfo.h
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1 //===-- X86BaseInfo.h - Top level definitions for X86 -------- --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains small standalone helper functions and enum definitions for
11 // the X86 target useful for the compiler back-end and the MC libraries.
12 // As such, it deliberately does not include references to LLVM core
13 // code gen types, passes, etc..
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_LIB_TARGET_X86_MCTARGETDESC_X86BASEINFO_H
18 #define LLVM_LIB_TARGET_X86_MCTARGETDESC_X86BASEINFO_H
19 
20 #include "X86MCTargetDesc.h"
21 #include "llvm/MC/MCInstrDesc.h"
22 #include "llvm/Support/DataTypes.h"
24 
25 namespace llvm {
26 
27 namespace X86 {
28  // Enums for memory operand decoding. Each memory operand is represented with
29  // a 5 operand sequence in the form:
30  // [BaseReg, ScaleAmt, IndexReg, Disp, Segment]
31  // These enums help decode this.
32  enum {
36  AddrDisp = 3,
37 
38  /// AddrSegmentReg - The operand # of the segment in the memory operand.
40 
41  /// AddrNumOperands - Total number of operands in a memory reference.
43  };
44 
45  /// AVX512 static rounding constants. These need to match the values in
46  /// avx512fintrin.h.
51  TO_ZERO = 3,
53  };
54 
55  /// The constants to describe instr prefixes if there are
56  enum IPREFIXES {
63  NO_SCHED_INFO = 32, // Don't add sched comment to the current instr because
64  // it was already added
66  };
67 } // end namespace X86;
68 
69 /// X86II - This namespace holds all of the target specific flags that
70 /// instruction info tracks.
71 ///
72 namespace X86II {
73  /// Target Operand Flag enum.
74  enum TOF {
75  //===------------------------------------------------------------------===//
76  // X86 Specific MachineOperand flags.
77 
79 
80  /// MO_GOT_ABSOLUTE_ADDRESS - On a symbol operand, this represents a
81  /// relocation of:
82  /// SYMBOL_LABEL + [. - PICBASELABEL]
84 
85  /// MO_PIC_BASE_OFFSET - On a symbol operand this indicates that the
86  /// immediate should get the value of the symbol minus the PIC base label:
87  /// SYMBOL_LABEL - PICBASELABEL
89 
90  /// MO_GOT - On a symbol operand this indicates that the immediate is the
91  /// offset to the GOT entry for the symbol name from the base of the GOT.
92  ///
93  /// See the X86-64 ELF ABI supplement for more details.
94  /// SYMBOL_LABEL @GOT
96 
97  /// MO_GOTOFF - On a symbol operand this indicates that the immediate is
98  /// the offset to the location of the symbol name from the base of the GOT.
99  ///
100  /// See the X86-64 ELF ABI supplement for more details.
101  /// SYMBOL_LABEL @GOTOFF
103 
104  /// MO_GOTPCREL - On a symbol operand this indicates that the immediate is
105  /// offset to the GOT entry for the symbol name from the current code
106  /// location.
107  ///
108  /// See the X86-64 ELF ABI supplement for more details.
109  /// SYMBOL_LABEL @GOTPCREL
111 
112  /// MO_PLT - On a symbol operand this indicates that the immediate is
113  /// offset to the PLT entry of symbol name from the current code location.
114  ///
115  /// See the X86-64 ELF ABI supplement for more details.
116  /// SYMBOL_LABEL @PLT
118 
119  /// MO_TLSGD - On a symbol operand this indicates that the immediate is
120  /// the offset of the GOT entry with the TLS index structure that contains
121  /// the module number and variable offset for the symbol. Used in the
122  /// general dynamic TLS access model.
123  ///
124  /// See 'ELF Handling for Thread-Local Storage' for more details.
125  /// SYMBOL_LABEL @TLSGD
127 
128  /// MO_TLSLD - On a symbol operand this indicates that the immediate is
129  /// the offset of the GOT entry with the TLS index for the module that
130  /// contains the symbol. When this index is passed to a call to
131  /// __tls_get_addr, the function will return the base address of the TLS
132  /// block for the symbol. Used in the x86-64 local dynamic TLS access model.
133  ///
134  /// See 'ELF Handling for Thread-Local Storage' for more details.
135  /// SYMBOL_LABEL @TLSLD
137 
138  /// MO_TLSLDM - On a symbol operand this indicates that the immediate is
139  /// the offset of the GOT entry with the TLS index for the module that
140  /// contains the symbol. When this index is passed to a call to
141  /// ___tls_get_addr, the function will return the base address of the TLS
142  /// block for the symbol. Used in the IA32 local dynamic TLS access model.
143  ///
144  /// See 'ELF Handling for Thread-Local Storage' for more details.
145  /// SYMBOL_LABEL @TLSLDM
147 
148  /// MO_GOTTPOFF - On a symbol operand this indicates that the immediate is
149  /// the offset of the GOT entry with the thread-pointer offset for the
150  /// symbol. Used in the x86-64 initial exec TLS access model.
151  ///
152  /// See 'ELF Handling for Thread-Local Storage' for more details.
153  /// SYMBOL_LABEL @GOTTPOFF
155 
156  /// MO_INDNTPOFF - On a symbol operand this indicates that the immediate is
157  /// the absolute address of the GOT entry with the negative thread-pointer
158  /// offset for the symbol. Used in the non-PIC IA32 initial exec TLS access
159  /// model.
160  ///
161  /// See 'ELF Handling for Thread-Local Storage' for more details.
162  /// SYMBOL_LABEL @INDNTPOFF
164 
165  /// MO_TPOFF - On a symbol operand this indicates that the immediate is
166  /// the thread-pointer offset for the symbol. Used in the x86-64 local
167  /// exec TLS access model.
168  ///
169  /// See 'ELF Handling for Thread-Local Storage' for more details.
170  /// SYMBOL_LABEL @TPOFF
172 
173  /// MO_DTPOFF - On a symbol operand this indicates that the immediate is
174  /// the offset of the GOT entry with the TLS offset of the symbol. Used
175  /// in the local dynamic TLS access model.
176  ///
177  /// See 'ELF Handling for Thread-Local Storage' for more details.
178  /// SYMBOL_LABEL @DTPOFF
180 
181  /// MO_NTPOFF - On a symbol operand this indicates that the immediate is
182  /// the negative thread-pointer offset for the symbol. Used in the IA32
183  /// local exec TLS access model.
184  ///
185  /// See 'ELF Handling for Thread-Local Storage' for more details.
186  /// SYMBOL_LABEL @NTPOFF
188 
189  /// MO_GOTNTPOFF - On a symbol operand this indicates that the immediate is
190  /// the offset of the GOT entry with the negative thread-pointer offset for
191  /// the symbol. Used in the PIC IA32 initial exec TLS access model.
192  ///
193  /// See 'ELF Handling for Thread-Local Storage' for more details.
194  /// SYMBOL_LABEL @GOTNTPOFF
196 
197  /// MO_DLLIMPORT - On a symbol operand "FOO", this indicates that the
198  /// reference is actually to the "__imp_FOO" symbol. This is used for
199  /// dllimport linkage on windows.
201 
202  /// MO_DARWIN_NONLAZY - On a symbol operand "FOO", this indicates that the
203  /// reference is actually to the "FOO$non_lazy_ptr" symbol, which is a
204  /// non-PIC-base-relative reference to a non-hidden dyld lazy pointer stub.
206 
207  /// MO_DARWIN_NONLAZY_PIC_BASE - On a symbol operand "FOO", this indicates
208  /// that the reference is actually to "FOO$non_lazy_ptr - PICBASE", which is
209  /// a PIC-base-relative reference to a non-hidden dyld lazy pointer stub.
211 
212  /// MO_TLVP - On a symbol operand this indicates that the immediate is
213  /// some TLS offset.
214  ///
215  /// This is the TLS offset for the Darwin TLS mechanism.
217 
218  /// MO_TLVP_PIC_BASE - On a symbol operand this indicates that the immediate
219  /// is some TLS offset from the picbase.
220  ///
221  /// This is the 32-bit TLS offset for Darwin TLS in PIC mode.
223 
224  /// MO_SECREL - On a symbol operand this indicates that the immediate is
225  /// the offset from beginning of section.
226  ///
227  /// This is the TLS offset for the COFF/Windows TLS mechanism.
229 
230  /// MO_ABS8 - On a symbol operand this indicates that the symbol is known
231  /// to be an absolute symbol in range [0,128), so we can use the @ABS8
232  /// symbol modifier.
234 
235  /// MO_COFFSTUB - On a symbol operand "FOO", this indicates that the
236  /// reference is actually to the ".refptr.FOO" symbol. This is used for
237  /// stub symbols on windows.
239  };
240 
241  enum : uint64_t {
242  //===------------------------------------------------------------------===//
243  // Instruction encodings. These are the standard/most common forms for X86
244  // instructions.
245  //
246 
247  // PseudoFrm - This represents an instruction that is a pseudo instruction
248  // or one that has not been implemented yet. It is illegal to code generate
249  // it, but tolerated for intermediate implementation stages.
250  Pseudo = 0,
251 
252  /// Raw - This form is for instructions that don't have any operands, so
253  /// they are just a fixed opcode value, like 'leave'.
254  RawFrm = 1,
255 
256  /// AddRegFrm - This form is used for instructions like 'push r32' that have
257  /// their one register operand added to their opcode.
259 
260  /// RawFrmMemOffs - This form is for instructions that store an absolute
261  /// memory offset as an immediate with a possible segment override.
263 
264  /// RawFrmSrc - This form is for instructions that use the source index
265  /// register SI/ESI/RSI with a possible segment override.
267 
268  /// RawFrmDst - This form is for instructions that use the destination index
269  /// register DI/EDI/RDI.
271 
272  /// RawFrmDstSrc - This form is for instructions that use the source index
273  /// register SI/ESI/RSI with a possible segment override, and also the
274  /// destination index register DI/EDI/RDI.
276 
277  /// RawFrmImm8 - This is used for the ENTER instruction, which has two
278  /// immediates, the first of which is a 16-bit immediate (specified by
279  /// the imm encoding) and the second is a 8-bit fixed value.
281 
282  /// RawFrmImm16 - This is used for CALL FAR instructions, which have two
283  /// immediates, the first of which is a 16 or 32-bit immediate (specified by
284  /// the imm encoding) and the second is a 16-bit fixed value. In the AMD
285  /// manual, this operand is described as pntr16:32 and pntr16:16
287 
288  /// MRM[0-7][rm] - These forms are used to represent instructions that use
289  /// a Mod/RM byte, and use the middle field to hold extended opcode
290  /// information. In the intel manual these are represented as /0, /1, ...
291  ///
292 
293  /// MRMDestMem - This form is used for instructions that use the Mod/RM byte
294  /// to specify a destination, which in this case is memory.
295  ///
297 
298  /// MRMSrcMem - This form is used for instructions that use the Mod/RM byte
299  /// to specify a source, which in this case is memory.
300  ///
301  MRMSrcMem = 33,
302 
303  /// MRMSrcMem4VOp3 - This form is used for instructions that encode
304  /// operand 3 with VEX.VVVV and load from memory.
305  ///
307 
308  /// MRMSrcMemOp4 - This form is used for instructions that use the Mod/RM
309  /// byte to specify the fourth source, which in this case is memory.
310  ///
312 
313  /// MRMXm - This form is used for instructions that use the Mod/RM byte
314  /// to specify a memory source, but doesn't use the middle field.
315  ///
316  MRMXm = 39, // Instruction that uses Mod/RM but not the middle field.
317 
318  // Next, instructions that operate on a memory r/m operand...
319  MRM0m = 40, MRM1m = 41, MRM2m = 42, MRM3m = 43, // Format /0 /1 /2 /3
320  MRM4m = 44, MRM5m = 45, MRM6m = 46, MRM7m = 47, // Format /4 /5 /6 /7
321 
322  /// MRMDestReg - This form is used for instructions that use the Mod/RM byte
323  /// to specify a destination, which in this case is a register.
324  ///
326 
327  /// MRMSrcReg - This form is used for instructions that use the Mod/RM byte
328  /// to specify a source, which in this case is a register.
329  ///
330  MRMSrcReg = 49,
331 
332  /// MRMSrcReg4VOp3 - This form is used for instructions that encode
333  /// operand 3 with VEX.VVVV and do not load from memory.
334  ///
336 
337  /// MRMSrcRegOp4 - This form is used for instructions that use the Mod/RM
338  /// byte to specify the fourth source, which in this case is a register.
339  ///
341 
342  /// MRMXr - This form is used for instructions that use the Mod/RM byte
343  /// to specify a register source, but doesn't use the middle field.
344  ///
345  MRMXr = 55, // Instruction that uses Mod/RM but not the middle field.
346 
347  // Instructions that operate on a register r/m operand...
348  MRM0r = 56, MRM1r = 57, MRM2r = 58, MRM3r = 59, // Format /0 /1 /2 /3
349  MRM4r = 60, MRM5r = 61, MRM6r = 62, MRM7r = 63, // Format /4 /5 /6 /7
350 
351  /// MRM_XX - A mod/rm byte of exactly 0xXX.
352  MRM_C0 = 64, MRM_C1 = 65, MRM_C2 = 66, MRM_C3 = 67,
353  MRM_C4 = 68, MRM_C5 = 69, MRM_C6 = 70, MRM_C7 = 71,
354  MRM_C8 = 72, MRM_C9 = 73, MRM_CA = 74, MRM_CB = 75,
355  MRM_CC = 76, MRM_CD = 77, MRM_CE = 78, MRM_CF = 79,
356  MRM_D0 = 80, MRM_D1 = 81, MRM_D2 = 82, MRM_D3 = 83,
357  MRM_D4 = 84, MRM_D5 = 85, MRM_D6 = 86, MRM_D7 = 87,
358  MRM_D8 = 88, MRM_D9 = 89, MRM_DA = 90, MRM_DB = 91,
359  MRM_DC = 92, MRM_DD = 93, MRM_DE = 94, MRM_DF = 95,
360  MRM_E0 = 96, MRM_E1 = 97, MRM_E2 = 98, MRM_E3 = 99,
361  MRM_E4 = 100, MRM_E5 = 101, MRM_E6 = 102, MRM_E7 = 103,
362  MRM_E8 = 104, MRM_E9 = 105, MRM_EA = 106, MRM_EB = 107,
363  MRM_EC = 108, MRM_ED = 109, MRM_EE = 110, MRM_EF = 111,
364  MRM_F0 = 112, MRM_F1 = 113, MRM_F2 = 114, MRM_F3 = 115,
365  MRM_F4 = 116, MRM_F5 = 117, MRM_F6 = 118, MRM_F7 = 119,
366  MRM_F8 = 120, MRM_F9 = 121, MRM_FA = 122, MRM_FB = 123,
367  MRM_FC = 124, MRM_FD = 125, MRM_FE = 126, MRM_FF = 127,
368 
369  FormMask = 127,
370 
371  //===------------------------------------------------------------------===//
372  // Actual flags...
373 
374  // OpSize - OpSizeFixed implies instruction never needs a 0x66 prefix.
375  // OpSize16 means this is a 16-bit instruction and needs 0x66 prefix in
376  // 32-bit mode. OpSize32 means this is a 32-bit instruction needs a 0x66
377  // prefix in 16-bit mode.
380 
384 
385  // AsSize - AdSizeX implies this instruction determines its need of 0x67
386  // prefix from a normal ModRM memory operand. The other types indicate that
387  // an operand is encoded with a specific width and a prefix is needed if
388  // it differs from the current mode.
391 
396 
397  //===------------------------------------------------------------------===//
398  // OpPrefix - There are several prefix bytes that are used as opcode
399  // extensions. These are 0x66, 0xF3, and 0xF2. If this field is 0 there is
400  // no prefix.
401  //
404 
405  // PD - Prefix code for packed double precision vector floating point
406  // operations performed in the SSE registers.
408 
409  // XS, XD - These prefix codes are for single and double precision scalar
410  // floating point operations performed in the SSE registers.
412 
413  //===------------------------------------------------------------------===//
414  // OpMap - This field determines which opcode map this instruction
415  // belongs to. i.e. one-byte, two-byte, 0x0f 0x38, 0x0f 0x3a, etc.
416  //
419 
420  // OB - OneByte - Set if this instruction has a one byte opcode.
421  OB = 0 << OpMapShift,
422 
423  // TB - TwoByte - Set if this instruction has a two byte opcode, which
424  // starts with a 0x0F byte before the real opcode.
425  TB = 1 << OpMapShift,
426 
427  // T8, TA - Prefix after the 0x0F prefix.
428  T8 = 2 << OpMapShift, TA = 3 << OpMapShift,
429 
430  // XOP8 - Prefix to include use of imm byte.
431  XOP8 = 4 << OpMapShift,
432 
433  // XOP9 - Prefix to exclude use of imm byte.
434  XOP9 = 5 << OpMapShift,
435 
436  // XOPA - Prefix to encode 0xA in VEX.MMMM of XOP instructions.
437  XOPA = 6 << OpMapShift,
438 
439  /// ThreeDNow - This indicates that the instruction uses the
440  /// wacky 0x0F 0x0F prefix for 3DNow! instructions. The manual documents
441  /// this as having a 0x0F prefix with a 0x0F opcode, and each instruction
442  /// storing a classifier in the imm8 field. To simplify our implementation,
443  /// we handle this by storeing the classifier in the opcode field and using
444  /// this flag to indicate that the encoder should do the wacky 3DNow! thing.
446 
447  //===------------------------------------------------------------------===//
448  // REX_W - REX prefixes are instruction prefixes used in 64-bit mode.
449  // They are used to specify GPRs and SSE registers, 64-bit operand size,
450  // etc. We only cares about REX.W and REX.R bits and only the former is
451  // statically determined.
452  //
454  REX_W = 1 << REXShift,
455 
456  //===------------------------------------------------------------------===//
457  // This three-bit field describes the size of an immediate operand. Zero is
458  // unused so that we can tell if we forgot to set a value.
460  ImmMask = 15 << ImmShift,
461  Imm8 = 1 << ImmShift,
464  Imm16 = 4 << ImmShift,
466  Imm32 = 6 << ImmShift,
468  Imm32S = 8 << ImmShift,
469  Imm64 = 9 << ImmShift,
470 
471  //===------------------------------------------------------------------===//
472  // FP Instruction Classification... Zero is non-fp instruction.
473 
474  // FPTypeMask - Mask for all of the FP types...
477 
478  // NotFP - The default, set for instructions that do not use FP registers.
480 
481  // ZeroArgFP - 0 arg FP instruction which implicitly pushes ST(0), f.e. fld0
483 
484  // OneArgFP - 1 arg FP instructions which implicitly read ST(0), such as fst
486 
487  // OneArgFPRW - 1 arg FP instruction which implicitly read ST(0) and write a
488  // result back to ST(0). For example, fcos, fsqrt, etc.
489  //
491 
492  // TwoArgFP - 2 arg FP instructions which implicitly read ST(0), and an
493  // explicit argument, storing the result to either ST(0) or the implicit
494  // argument. For example: fadd, fsub, fmul, etc...
496 
497  // CompareFP - 2 arg FP instructions which implicitly read ST(0) and an
498  // explicit argument, but have no destination. Example: fucom, fucomi, ...
500 
501  // CondMovFP - "2 operand" floating point conditional move instructions.
503 
504  // SpecialFP - Special instruction forms. Dispatch by opcode explicitly.
506 
507  // Lock prefix
509  LOCK = 1 << LOCKShift,
510 
511  // REP prefix
513  REP = 1 << REPShift,
514 
515  // Execution domain for SSE instructions.
516  // 0 means normal, non-SSE instruction.
518 
519  // Encoding
522 
523  // VEX - encoding using 0xC4/0xC5
525 
526  /// XOP - Opcode prefix used by XOP instructions.
528 
529  // VEX_EVEX - Specifies that this instruction use EVEX form which provides
530  // syntax support up to 32 512-bit register operands and up to 7 16-bit
531  // mask operands as well as source operand data swizzling/memory operand
532  // conversion, eviction hint, and rounding mode.
534 
535  // Opcode
537 
538  /// VEX_W - Has a opcode specific functionality, but is used in the same
539  /// way as REX_W is for regular SSE instructions.
541  VEX_W = 1ULL << VEX_WShift,
542 
543  /// VEX_4V - Used to specify an additional AVX/SSE register. Several 2
544  /// address instructions in SSE are represented as 3 address ones in AVX
545  /// and the additional register is encoded in VEX_VVVV prefix.
546  VEX_4VShift = VEX_WShift + 1,
547  VEX_4V = 1ULL << VEX_4VShift,
548 
549  /// VEX_L - Stands for a bit in the VEX opcode prefix meaning the current
550  /// instruction uses 256-bit wide registers. This is usually auto detected
551  /// if a VR256 register is used, but some AVX instructions also have this
552  /// field marked when using a f256 memory references.
553  VEX_LShift = VEX_4VShift + 1,
554  VEX_L = 1ULL << VEX_LShift,
555 
556  // EVEX_K - Set if this instruction requires masking
557  EVEX_KShift = VEX_LShift + 1,
558  EVEX_K = 1ULL << EVEX_KShift,
559 
560  // EVEX_Z - Set if this instruction has EVEX.Z field set.
561  EVEX_ZShift = EVEX_KShift + 1,
562  EVEX_Z = 1ULL << EVEX_ZShift,
563 
564  // EVEX_L2 - Set if this instruction has EVEX.L' field set.
565  EVEX_L2Shift = EVEX_ZShift + 1,
567 
568  // EVEX_B - Set if this instruction has EVEX.B field set.
569  EVEX_BShift = EVEX_L2Shift + 1,
570  EVEX_B = 1ULL << EVEX_BShift,
571 
572  // The scaling factor for the AVX512's 8-bit compressed displacement.
573  CD8_Scale_Shift = EVEX_BShift + 1,
575 
576  /// Explicitly specified rounding control
577  EVEX_RCShift = CD8_Scale_Shift + 7,
579 
580  // NOTRACK prefix
581  NoTrackShift = EVEX_RCShift + 1,
583  };
584 
585  // getBaseOpcodeFor - This function returns the "base" X86 opcode for the
586  // specified machine instruction.
587  //
588  inline uint8_t getBaseOpcodeFor(uint64_t TSFlags) {
589  return TSFlags >> X86II::OpcodeShift;
590  }
591 
592  inline bool hasImm(uint64_t TSFlags) {
593  return (TSFlags & X86II::ImmMask) != 0;
594  }
595 
596  /// getSizeOfImm - Decode the "size of immediate" field from the TSFlags field
597  /// of the specified instruction.
598  inline unsigned getSizeOfImm(uint64_t TSFlags) {
599  switch (TSFlags & X86II::ImmMask) {
600  default: llvm_unreachable("Unknown immediate size");
601  case X86II::Imm8:
602  case X86II::Imm8PCRel:
603  case X86II::Imm8Reg: return 1;
604  case X86II::Imm16:
605  case X86II::Imm16PCRel: return 2;
606  case X86II::Imm32:
607  case X86II::Imm32S:
608  case X86II::Imm32PCRel: return 4;
609  case X86II::Imm64: return 8;
610  }
611  }
612 
613  /// isImmPCRel - Return true if the immediate of the specified instruction's
614  /// TSFlags indicates that it is pc relative.
615  inline unsigned isImmPCRel(uint64_t TSFlags) {
616  switch (TSFlags & X86II::ImmMask) {
617  default: llvm_unreachable("Unknown immediate size");
618  case X86II::Imm8PCRel:
619  case X86II::Imm16PCRel:
620  case X86II::Imm32PCRel:
621  return true;
622  case X86II::Imm8:
623  case X86II::Imm8Reg:
624  case X86II::Imm16:
625  case X86II::Imm32:
626  case X86II::Imm32S:
627  case X86II::Imm64:
628  return false;
629  }
630  }
631 
632  /// isImmSigned - Return true if the immediate of the specified instruction's
633  /// TSFlags indicates that it is signed.
634  inline unsigned isImmSigned(uint64_t TSFlags) {
635  switch (TSFlags & X86II::ImmMask) {
636  default: llvm_unreachable("Unknown immediate signedness");
637  case X86II::Imm32S:
638  return true;
639  case X86II::Imm8:
640  case X86II::Imm8PCRel:
641  case X86II::Imm8Reg:
642  case X86II::Imm16:
643  case X86II::Imm16PCRel:
644  case X86II::Imm32:
645  case X86II::Imm32PCRel:
646  case X86II::Imm64:
647  return false;
648  }
649  }
650 
651  /// getOperandBias - compute whether all of the def operands are repeated
652  /// in the uses and therefore should be skipped.
653  /// This determines the start of the unique operand list. We need to determine
654  /// if all of the defs have a corresponding tied operand in the uses.
655  /// Unfortunately, the tied operand information is encoded in the uses not
656  /// the defs so we have to use some heuristics to find which operands to
657  /// query.
658  inline unsigned getOperandBias(const MCInstrDesc& Desc) {
659  unsigned NumDefs = Desc.getNumDefs();
660  unsigned NumOps = Desc.getNumOperands();
661  switch (NumDefs) {
662  default: llvm_unreachable("Unexpected number of defs");
663  case 0:
664  return 0;
665  case 1:
666  // Common two addr case.
667  if (NumOps > 1 && Desc.getOperandConstraint(1, MCOI::TIED_TO) == 0)
668  return 1;
669  // Check for AVX-512 scatter which has a TIED_TO in the second to last
670  // operand.
671  if (NumOps == 8 &&
672  Desc.getOperandConstraint(6, MCOI::TIED_TO) == 0)
673  return 1;
674  return 0;
675  case 2:
676  // XCHG/XADD have two destinations and two sources.
677  if (NumOps >= 4 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0 &&
678  Desc.getOperandConstraint(3, MCOI::TIED_TO) == 1)
679  return 2;
680  // Check for gather. AVX-512 has the second tied operand early. AVX2
681  // has it as the last op.
682  if (NumOps == 9 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0 &&
683  (Desc.getOperandConstraint(3, MCOI::TIED_TO) == 1 ||
684  Desc.getOperandConstraint(8, MCOI::TIED_TO) == 1) &&
685  "Instruction with 2 defs isn't gather?")
686  return 2;
687  return 0;
688  }
689  }
690 
691  /// getMemoryOperandNo - The function returns the MCInst operand # for the
692  /// first field of the memory operand. If the instruction doesn't have a
693  /// memory operand, this returns -1.
694  ///
695  /// Note that this ignores tied operands. If there is a tied register which
696  /// is duplicated in the MCInst (e.g. "EAX = addl EAX, [mem]") it is only
697  /// counted as one operand.
698  ///
699  inline int getMemoryOperandNo(uint64_t TSFlags) {
700  bool HasVEX_4V = TSFlags & X86II::VEX_4V;
701  bool HasEVEX_K = TSFlags & X86II::EVEX_K;
702 
703  switch (TSFlags & X86II::FormMask) {
704  default: llvm_unreachable("Unknown FormMask value in getMemoryOperandNo!");
705  case X86II::Pseudo:
706  case X86II::RawFrm:
707  case X86II::AddRegFrm:
708  case X86II::RawFrmImm8:
709  case X86II::RawFrmImm16:
711  case X86II::RawFrmSrc:
712  case X86II::RawFrmDst:
713  case X86II::RawFrmDstSrc:
714  return -1;
715  case X86II::MRMDestMem:
716  return 0;
717  case X86II::MRMSrcMem:
718  // Start from 1, skip any registers encoded in VEX_VVVV or I8IMM, or a
719  // mask register.
720  return 1 + HasVEX_4V + HasEVEX_K;
722  // Skip registers encoded in reg.
723  return 1 + HasEVEX_K;
724  case X86II::MRMSrcMemOp4:
725  // Skip registers encoded in reg, VEX_VVVV, and I8IMM.
726  return 3;
727  case X86II::MRMDestReg:
728  case X86II::MRMSrcReg:
730  case X86II::MRMSrcRegOp4:
731  case X86II::MRMXr:
732  case X86II::MRM0r: case X86II::MRM1r:
733  case X86II::MRM2r: case X86II::MRM3r:
734  case X86II::MRM4r: case X86II::MRM5r:
735  case X86II::MRM6r: case X86II::MRM7r:
736  return -1;
737  case X86II::MRMXm:
738  case X86II::MRM0m: case X86II::MRM1m:
739  case X86II::MRM2m: case X86II::MRM3m:
740  case X86II::MRM4m: case X86II::MRM5m:
741  case X86II::MRM6m: case X86II::MRM7m:
742  // Start from 0, skip registers encoded in VEX_VVVV or a mask register.
743  return 0 + HasVEX_4V + HasEVEX_K;
744  case X86II::MRM_C0: case X86II::MRM_C1: case X86II::MRM_C2:
745  case X86II::MRM_C3: case X86II::MRM_C4: case X86II::MRM_C5:
746  case X86II::MRM_C6: case X86II::MRM_C7: case X86II::MRM_C8:
747  case X86II::MRM_C9: case X86II::MRM_CA: case X86II::MRM_CB:
748  case X86II::MRM_CC: case X86II::MRM_CD: case X86II::MRM_CE:
749  case X86II::MRM_CF: case X86II::MRM_D0: case X86II::MRM_D1:
750  case X86II::MRM_D2: case X86II::MRM_D3: case X86II::MRM_D4:
751  case X86II::MRM_D5: case X86II::MRM_D6: case X86II::MRM_D7:
752  case X86II::MRM_D8: case X86II::MRM_D9: case X86II::MRM_DA:
753  case X86II::MRM_DB: case X86II::MRM_DC: case X86II::MRM_DD:
754  case X86II::MRM_DE: case X86II::MRM_DF: case X86II::MRM_E0:
755  case X86II::MRM_E1: case X86II::MRM_E2: case X86II::MRM_E3:
756  case X86II::MRM_E4: case X86II::MRM_E5: case X86II::MRM_E6:
757  case X86II::MRM_E7: case X86II::MRM_E8: case X86II::MRM_E9:
758  case X86II::MRM_EA: case X86II::MRM_EB: case X86II::MRM_EC:
759  case X86II::MRM_ED: case X86II::MRM_EE: case X86II::MRM_EF:
760  case X86II::MRM_F0: case X86II::MRM_F1: case X86II::MRM_F2:
761  case X86II::MRM_F3: case X86II::MRM_F4: case X86II::MRM_F5:
762  case X86II::MRM_F6: case X86II::MRM_F7: case X86II::MRM_F8:
763  case X86II::MRM_F9: case X86II::MRM_FA: case X86II::MRM_FB:
764  case X86II::MRM_FC: case X86II::MRM_FD: case X86II::MRM_FE:
765  case X86II::MRM_FF:
766  return -1;
767  }
768  }
769 
770  /// isX86_64ExtendedReg - Is the MachineOperand a x86-64 extended (r8 or
771  /// higher) register? e.g. r8, xmm8, xmm13, etc.
772  inline bool isX86_64ExtendedReg(unsigned RegNo) {
773  if ((RegNo >= X86::XMM8 && RegNo <= X86::XMM31) ||
774  (RegNo >= X86::YMM8 && RegNo <= X86::YMM31) ||
775  (RegNo >= X86::ZMM8 && RegNo <= X86::ZMM31))
776  return true;
777 
778  switch (RegNo) {
779  default: break;
780  case X86::R8: case X86::R9: case X86::R10: case X86::R11:
781  case X86::R12: case X86::R13: case X86::R14: case X86::R15:
782  case X86::R8D: case X86::R9D: case X86::R10D: case X86::R11D:
783  case X86::R12D: case X86::R13D: case X86::R14D: case X86::R15D:
784  case X86::R8W: case X86::R9W: case X86::R10W: case X86::R11W:
785  case X86::R12W: case X86::R13W: case X86::R14W: case X86::R15W:
786  case X86::R8B: case X86::R9B: case X86::R10B: case X86::R11B:
787  case X86::R12B: case X86::R13B: case X86::R14B: case X86::R15B:
788  case X86::CR8: case X86::CR9: case X86::CR10: case X86::CR11:
789  case X86::CR12: case X86::CR13: case X86::CR14: case X86::CR15:
790  case X86::DR8: case X86::DR9: case X86::DR10: case X86::DR11:
791  case X86::DR12: case X86::DR13: case X86::DR14: case X86::DR15:
792  return true;
793  }
794  return false;
795  }
796 
797  /// is32ExtendedReg - Is the MemoryOperand a 32 extended (zmm16 or higher)
798  /// registers? e.g. zmm21, etc.
799  static inline bool is32ExtendedReg(unsigned RegNo) {
800  return ((RegNo >= X86::XMM16 && RegNo <= X86::XMM31) ||
801  (RegNo >= X86::YMM16 && RegNo <= X86::YMM31) ||
802  (RegNo >= X86::ZMM16 && RegNo <= X86::ZMM31));
803  }
804 
805 
806  inline bool isX86_64NonExtLowByteReg(unsigned reg) {
807  return (reg == X86::SPL || reg == X86::BPL ||
808  reg == X86::SIL || reg == X86::DIL);
809  }
810 
811  /// isKMasked - Is this a masked instruction.
812  inline bool isKMasked(uint64_t TSFlags) {
813  return (TSFlags & X86II::EVEX_K) != 0;
814  }
815 
816  /// isKMergedMasked - Is this a merge masked instruction.
817  inline bool isKMergeMasked(uint64_t TSFlags) {
818  return isKMasked(TSFlags) && (TSFlags & X86II::EVEX_Z) == 0;
819  }
820 }
821 
822 } // end namespace llvm;
823 
824 #endif
MO_SECREL - On a symbol operand this indicates that the immediate is the offset from beginning of sec...
Definition: X86BaseInfo.h:228
MRMSrcMem4VOp3 - This form is used for instructions that encode operand 3 with VEX.VVVV and load from memory.
Definition: X86BaseInfo.h:306
MO_COFFSTUB - On a symbol operand "FOO", this indicates that the reference is actually to the "...
Definition: X86BaseInfo.h:238
bool isX86_64NonExtLowByteReg(unsigned reg)
Definition: X86BaseInfo.h:806
#define REP(f, t)
MRM_XX - A mod/rm byte of exactly 0xXX.
Definition: X86BaseInfo.h:352
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
MO_TLSLD - On a symbol operand this indicates that the immediate is the offset of the GOT entry with ...
Definition: X86BaseInfo.h:136
MO_TLVP_PIC_BASE - On a symbol operand this indicates that the immediate is some TLS offset from the ...
Definition: X86BaseInfo.h:222
Describe properties that are true of each instruction in the target description file.
Definition: MCInstrDesc.h:163
RawFrmImm8 - This is used for the ENTER instruction, which has two immediates, the first of which is ...
Definition: X86BaseInfo.h:280
VEX_L - Stands for a bit in the VEX opcode prefix meaning the current instruction uses 256-bit wide r...
Definition: X86BaseInfo.h:553
MO_GOTPCREL - On a symbol operand this indicates that the immediate is offset to the GOT entry for th...
Definition: X86BaseInfo.h:110
MO_DTPOFF - On a symbol operand this indicates that the immediate is the offset of the GOT entry with...
Definition: X86BaseInfo.h:179
RawFrmImm16 - This is used for CALL FAR instructions, which have two immediates, the first of which i...
Definition: X86BaseInfo.h:286
unsigned isImmPCRel(uint64_t TSFlags)
isImmPCRel - Return true if the immediate of the specified instruction&#39;s TSFlags indicates that it is...
Definition: X86BaseInfo.h:615
MO_DARWIN_NONLAZY_PIC_BASE - On a symbol operand "FOO", this indicates that the reference is actually...
Definition: X86BaseInfo.h:210
VEX_W - Has a opcode specific functionality, but is used in the same way as REX_W is for regular SSE ...
Definition: X86BaseInfo.h:540
unsigned getNumOperands() const
Return the number of declared MachineOperands for this MachineInstruction.
Definition: MCInstrDesc.h:210
Raw - This form is for instructions that don&#39;t have any operands, so they are just a fixed opcode val...
Definition: X86BaseInfo.h:254
AddRegFrm - This form is used for instructions like &#39;push r32&#39; that have their one register operand a...
Definition: X86BaseInfo.h:258
uint8_t getBaseOpcodeFor(uint64_t TSFlags)
Definition: X86BaseInfo.h:588
MO_GOT - On a symbol operand this indicates that the immediate is the offset to the GOT entry for the...
Definition: X86BaseInfo.h:95
MO_GOTTPOFF - On a symbol operand this indicates that the immediate is the offset of the GOT entry wi...
Definition: X86BaseInfo.h:154
MO_ABS8 - On a symbol operand this indicates that the symbol is known to be an absolute symbol in ran...
Definition: X86BaseInfo.h:233
VEX_4V - Used to specify an additional AVX/SSE register.
Definition: X86BaseInfo.h:546
RawFrmDst - This form is for instructions that use the destination index register DI/EDI/RDI...
Definition: X86BaseInfo.h:270
bool hasImm(uint64_t TSFlags)
Definition: X86BaseInfo.h:592
MO_DARWIN_NONLAZY - On a symbol operand "FOO", this indicates that the reference is actually to the "...
Definition: X86BaseInfo.h:205
bool isX86_64ExtendedReg(unsigned RegNo)
isX86_64ExtendedReg - Is the MachineOperand a x86-64 extended (r8 or higher) register? e.g.
Definition: X86BaseInfo.h:772
MRMDestReg - This form is used for instructions that use the Mod/RM byte to specify a destination...
Definition: X86BaseInfo.h:325
MO_GOT_ABSOLUTE_ADDRESS - On a symbol operand, this represents a relocation of: SYMBOL_LABEL + [...
Definition: X86BaseInfo.h:83
MRMSrcReg - This form is used for instructions that use the Mod/RM byte to specify a source...
Definition: X86BaseInfo.h:330
IPREFIXES
The constants to describe instr prefixes if there are.
Definition: X86BaseInfo.h:56
MO_GOTNTPOFF - On a symbol operand this indicates that the immediate is the offset of the GOT entry w...
Definition: X86BaseInfo.h:195
MO_TLVP - On a symbol operand this indicates that the immediate is some TLS offset.
Definition: X86BaseInfo.h:216
MO_TLSLDM - On a symbol operand this indicates that the immediate is the offset of the GOT entry with...
Definition: X86BaseInfo.h:146
MO_NTPOFF - On a symbol operand this indicates that the immediate is the negative thread-pointer offs...
Definition: X86BaseInfo.h:187
unsigned getOperandBias(const MCInstrDesc &Desc)
getOperandBias - compute whether all of the def operands are repeated in the uses and therefore shoul...
Definition: X86BaseInfo.h:658
unsigned isImmSigned(uint64_t TSFlags)
isImmSigned - Return true if the immediate of the specified instruction&#39;s TSFlags indicates that it i...
Definition: X86BaseInfo.h:634
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Windows x64, Windows Itanium (IA-64)
MO_TLSGD - On a symbol operand this indicates that the immediate is the offset of the GOT entry with ...
Definition: X86BaseInfo.h:126
MO_TPOFF - On a symbol operand this indicates that the immediate is the thread-pointer offset for the...
Definition: X86BaseInfo.h:171
static bool is32ExtendedReg(unsigned RegNo)
is32ExtendedReg - Is the MemoryOperand a 32 extended (zmm16 or higher) registers? e...
Definition: X86BaseInfo.h:799
int getOperandConstraint(unsigned OpNum, MCOI::OperandConstraint Constraint) const
Returns the value of the specific constraint if it is set.
Definition: MCInstrDesc.h:187
MRM[0-7][rm] - These forms are used to represent instructions that use a Mod/RM byte, and use the middle field to hold extended opcode information.
Definition: X86BaseInfo.h:296
MRMSrcMem - This form is used for instructions that use the Mod/RM byte to specify a source...
Definition: X86BaseInfo.h:301
unsigned getNumDefs() const
Return the number of MachineOperands that are register definitions.
Definition: MCInstrDesc.h:225
bool isKMergeMasked(uint64_t TSFlags)
isKMergedMasked - Is this a merge masked instruction.
Definition: X86BaseInfo.h:817
RawFrmDstSrc - This form is for instructions that use the source index register SI/ESI/RSI with a pos...
Definition: X86BaseInfo.h:275
MRMSrcMemOp4 - This form is used for instructions that use the Mod/RM byte to specify the fourth sour...
Definition: X86BaseInfo.h:311
MRMXm - This form is used for instructions that use the Mod/RM byte to specify a memory source...
Definition: X86BaseInfo.h:316
XOP - Opcode prefix used by XOP instructions.
Definition: X86BaseInfo.h:527
MRMXr - This form is used for instructions that use the Mod/RM byte to specify a register source...
Definition: X86BaseInfo.h:345
AddrSegmentReg - The operand # of the segment in the memory operand.
Definition: X86BaseInfo.h:39
MO_GOTOFF - On a symbol operand this indicates that the immediate is the offset to the location of th...
Definition: X86BaseInfo.h:102
AddrNumOperands - Total number of operands in a memory reference.
Definition: X86BaseInfo.h:42
MO_INDNTPOFF - On a symbol operand this indicates that the immediate is the absolute address of the G...
Definition: X86BaseInfo.h:163
RawFrmMemOffs - This form is for instructions that store an absolute memory offset as an immediate wi...
Definition: X86BaseInfo.h:262
unsigned getSizeOfImm(uint64_t TSFlags)
getSizeOfImm - Decode the "size of immediate" field from the TSFlags field of the specified instructi...
Definition: X86BaseInfo.h:598
TOF
Target Operand Flag enum.
Definition: X86BaseInfo.h:74
ThreeDNow - This indicates that the instruction uses the wacky 0x0F 0x0F prefix for 3DNow! instructio...
Definition: X86BaseInfo.h:445
RawFrmSrc - This form is for instructions that use the source index register SI/ESI/RSI with a possib...
Definition: X86BaseInfo.h:266
STATIC_ROUNDING
AVX512 static rounding constants.
Definition: X86BaseInfo.h:47
bool isKMasked(uint64_t TSFlags)
isKMasked - Is this a masked instruction.
Definition: X86BaseInfo.h:812
MO_PLT - On a symbol operand this indicates that the immediate is offset to the PLT entry of symbol n...
Definition: X86BaseInfo.h:117
Explicitly specified rounding control.
Definition: X86BaseInfo.h:577
MO_PIC_BASE_OFFSET - On a symbol operand this indicates that the immediate should get the value of th...
Definition: X86BaseInfo.h:88
MRMSrcReg4VOp3 - This form is used for instructions that encode operand 3 with VEX.VVVV and do not load from memory.
Definition: X86BaseInfo.h:335
MRMSrcRegOp4 - This form is used for instructions that use the Mod/RM byte to specify the fourth sour...
Definition: X86BaseInfo.h:340
MO_DLLIMPORT - On a symbol operand "FOO", this indicates that the reference is actually to the "__imp...
Definition: X86BaseInfo.h:200
int getMemoryOperandNo(uint64_t TSFlags)
getMemoryOperandNo - The function returns the MCInst operand # for the first field of the memory oper...
Definition: X86BaseInfo.h:699