1 //===- X86RecognizableInstr.cpp - Disassembler instruction spec --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is part of the X86 Disassembler Emitter.
11 // It contains the implementation of a single recognizable instruction.
12 // Documentation for the disassembler emitter in general can be found in
13 // X86DisasemblerEmitter.h.
15 //===----------------------------------------------------------------------===//
17 #include "X86DisassemblerShared.h"
18 #include "X86RecognizableInstr.h"
19 #include "X86ModRMFilters.h"
21 #include "llvm/Support/ErrorHandling.h"
50 // A clone of X86 since we can't depend on something that is generated.
60 MRM0r = 16, MRM1r = 17, MRM2r = 18, MRM3r = 19,
61 MRM4r = 20, MRM5r = 21, MRM6r = 22, MRM7r = 23,
62 MRM0m = 24, MRM1m = 25, MRM2m = 26, MRM3m = 27,
63 MRM4m = 28, MRM5m = 29, MRM6m = 30, MRM7m = 31,
67 #define MAP(from, to) MRM_##from = to,
76 D8 = 3, D9 = 4, DA = 5, DB = 6,
77 DC = 7, DD = 8, DE = 9, DF = 10,
80 A6 = 15, A7 = 16, T8XD = 17, T8XS = 18, TAXD = 19
84 // If rows are added to the opcode extension tables, then corresponding entries
85 // must be added here.
87 // If the row corresponds to a single byte (i.e., 8f), then add an entry for
88 // that byte to ONE_BYTE_EXTENSION_TABLES.
90 // If the row corresponds to two bytes where the first is 0f, add an entry for
91 // the second byte to TWO_BYTE_EXTENSION_TABLES.
93 // If the row corresponds to some other set of bytes, you will need to modify
94 // the code in RecognizableInstr::emitDecodePath() as well, and add new prefixes
95 // to the X86 TD files, except in two cases: if the first two bytes of such a
96 // new combination are 0f 38 or 0f 3a, you just have to add maps called
97 // THREE_BYTE_38_EXTENSION_TABLES and THREE_BYTE_3A_EXTENSION_TABLES and add a
98 // switch(Opcode) just below the case X86Local::T8: or case X86Local::TA: line
99 // in RecognizableInstr::emitDecodePath().
101 #define ONE_BYTE_EXTENSION_TABLES \
102 EXTENSION_TABLE(80) \
103 EXTENSION_TABLE(81) \
104 EXTENSION_TABLE(82) \
105 EXTENSION_TABLE(83) \
106 EXTENSION_TABLE(8f) \
107 EXTENSION_TABLE(c0) \
108 EXTENSION_TABLE(c1) \
109 EXTENSION_TABLE(c6) \
110 EXTENSION_TABLE(c7) \
111 EXTENSION_TABLE(d0) \
112 EXTENSION_TABLE(d1) \
113 EXTENSION_TABLE(d2) \
114 EXTENSION_TABLE(d3) \
115 EXTENSION_TABLE(f6) \
116 EXTENSION_TABLE(f7) \
117 EXTENSION_TABLE(fe) \
120 #define TWO_BYTE_EXTENSION_TABLES \
121 EXTENSION_TABLE(00) \
122 EXTENSION_TABLE(01) \
123 EXTENSION_TABLE(18) \
124 EXTENSION_TABLE(71) \
125 EXTENSION_TABLE(72) \
126 EXTENSION_TABLE(73) \
127 EXTENSION_TABLE(ae) \
128 EXTENSION_TABLE(ba) \
131 #define THREE_BYTE_38_EXTENSION_TABLES \
134 using namespace X86Disassembler;
136 /// needsModRMForDecode - Indicates whether a particular instruction requires a
137 /// ModR/M byte for the instruction to be properly decoded. For example, a
138 /// MRMDestReg instruction needs the Mod field in the ModR/M byte to be set to
141 /// @param form - The form of the instruction.
142 /// @return - true if the form implies that a ModR/M byte is required, false
144 static bool needsModRMForDecode(uint8_t form) {
145 if (form == X86Local::MRMDestReg ||
146 form == X86Local::MRMDestMem ||
147 form == X86Local::MRMSrcReg ||
148 form == X86Local::MRMSrcMem ||
149 (form >= X86Local::MRM0r && form <= X86Local::MRM7r) ||
150 (form >= X86Local::MRM0m && form <= X86Local::MRM7m))
156 /// isRegFormat - Indicates whether a particular form requires the Mod field of
157 /// the ModR/M byte to be 0b11.
159 /// @param form - The form of the instruction.
160 /// @return - true if the form implies that Mod must be 0b11, false
162 static bool isRegFormat(uint8_t form) {
163 if (form == X86Local::MRMDestReg ||
164 form == X86Local::MRMSrcReg ||
165 (form >= X86Local::MRM0r && form <= X86Local::MRM7r))
171 /// byteFromBitsInit - Extracts a value at most 8 bits in width from a BitsInit.
172 /// Useful for switch statements and the like.
174 /// @param init - A reference to the BitsInit to be decoded.
175 /// @return - The field, with the first bit in the BitsInit as the lowest
177 static uint8_t byteFromBitsInit(BitsInit &init) {
178 int width = init.getNumBits();
180 assert(width <= 8 && "Field is too large for uint8_t!");
187 for (index = 0; index < width; index++) {
188 if (static_cast<BitInit*>(init.getBit(index))->getValue())
197 /// byteFromRec - Extract a value at most 8 bits in with from a Record given the
198 /// name of the field.
200 /// @param rec - The record from which to extract the value.
201 /// @param name - The name of the field in the record.
202 /// @return - The field, as translated by byteFromBitsInit().
203 static uint8_t byteFromRec(const Record* rec, const std::string &name) {
204 BitsInit* bits = rec->getValueAsBitsInit(name);
205 return byteFromBitsInit(*bits);
208 RecognizableInstr::RecognizableInstr(DisassemblerTables &tables,
209 const CodeGenInstruction &insn,
214 Name = Rec->getName();
215 Spec = &tables.specForUID(UID);
217 if (!Rec->isSubClassOf("X86Inst")) {
218 ShouldBeEmitted = false;
222 Prefix = byteFromRec(Rec, "Prefix");
223 Opcode = byteFromRec(Rec, "Opcode");
224 Form = byteFromRec(Rec, "FormBits");
225 SegOvr = byteFromRec(Rec, "SegOvrBits");
227 HasOpSizePrefix = Rec->getValueAsBit("hasOpSizePrefix");
228 HasAdSizePrefix = Rec->getValueAsBit("hasAdSizePrefix");
229 HasREX_WPrefix = Rec->getValueAsBit("hasREX_WPrefix");
230 HasVEXPrefix = Rec->getValueAsBit("hasVEXPrefix");
231 HasVEX_4VPrefix = Rec->getValueAsBit("hasVEX_4VPrefix");
232 HasVEX_4VOp3Prefix = Rec->getValueAsBit("hasVEX_4VOp3Prefix");
233 HasVEX_WPrefix = Rec->getValueAsBit("hasVEX_WPrefix");
234 HasMemOp4Prefix = Rec->getValueAsBit("hasMemOp4Prefix");
235 IgnoresVEX_L = Rec->getValueAsBit("ignoresVEX_L");
236 HasLockPrefix = Rec->getValueAsBit("hasLockPrefix");
237 IsCodeGenOnly = Rec->getValueAsBit("isCodeGenOnly");
239 Name = Rec->getName();
240 AsmString = Rec->getValueAsString("AsmString");
242 Operands = &insn.Operands.OperandList;
244 IsSSE = (HasOpSizePrefix && (Name.find("16") == Name.npos)) ||
245 (Name.find("CRC32") != Name.npos);
246 HasFROperands = hasFROperands();
247 HasVEX_LPrefix = has256BitOperands() || Rec->getValueAsBit("hasVEX_L");
249 // Check for 64-bit inst which does not require REX
252 // FIXME: Is there some better way to check for In64BitMode?
253 std::vector<Record*> Predicates = Rec->getValueAsListOfDefs("Predicates");
254 for (unsigned i = 0, e = Predicates.size(); i != e; ++i) {
255 if (Predicates[i]->getName().find("32Bit") != Name.npos) {
259 if (Predicates[i]->getName().find("64Bit") != Name.npos) {
264 // FIXME: These instructions aren't marked as 64-bit in any way
265 Is64Bit |= Rec->getName() == "JMP64pcrel32" ||
266 Rec->getName() == "MASKMOVDQU64" ||
267 Rec->getName() == "POPFS64" ||
268 Rec->getName() == "POPGS64" ||
269 Rec->getName() == "PUSHFS64" ||
270 Rec->getName() == "PUSHGS64" ||
271 Rec->getName() == "REX64_PREFIX" ||
272 Rec->getName().find("MOV64") != Name.npos ||
273 Rec->getName().find("PUSH64") != Name.npos ||
274 Rec->getName().find("POP64") != Name.npos;
276 ShouldBeEmitted = true;
279 void RecognizableInstr::processInstr(DisassemblerTables &tables,
280 const CodeGenInstruction &insn,
283 // Ignore "asm parser only" instructions.
284 if (insn.TheDef->getValueAsBit("isAsmParserOnly"))
287 RecognizableInstr recogInstr(tables, insn, uid);
289 recogInstr.emitInstructionSpecifier(tables);
291 if (recogInstr.shouldBeEmitted())
292 recogInstr.emitDecodePath(tables);
295 InstructionContext RecognizableInstr::insnContext() const {
296 InstructionContext insnContext;
298 if (HasVEX_4VPrefix || HasVEX_4VOp3Prefix|| HasVEXPrefix) {
299 if (HasVEX_LPrefix && HasVEX_WPrefix) {
301 insnContext = IC_VEX_L_W_OPSIZE;
303 llvm_unreachable("Don't support VEX.L and VEX.W together");
304 } else if (HasOpSizePrefix && HasVEX_LPrefix)
305 insnContext = IC_VEX_L_OPSIZE;
306 else if (HasOpSizePrefix && HasVEX_WPrefix)
307 insnContext = IC_VEX_W_OPSIZE;
308 else if (HasOpSizePrefix)
309 insnContext = IC_VEX_OPSIZE;
310 else if (HasVEX_LPrefix &&
311 (Prefix == X86Local::XS || Prefix == X86Local::T8XS))
312 insnContext = IC_VEX_L_XS;
313 else if (HasVEX_LPrefix && (Prefix == X86Local::XD ||
314 Prefix == X86Local::T8XD ||
315 Prefix == X86Local::TAXD))
316 insnContext = IC_VEX_L_XD;
317 else if (HasVEX_WPrefix &&
318 (Prefix == X86Local::XS || Prefix == X86Local::T8XS))
319 insnContext = IC_VEX_W_XS;
320 else if (HasVEX_WPrefix && (Prefix == X86Local::XD ||
321 Prefix == X86Local::T8XD ||
322 Prefix == X86Local::TAXD))
323 insnContext = IC_VEX_W_XD;
324 else if (HasVEX_WPrefix)
325 insnContext = IC_VEX_W;
326 else if (HasVEX_LPrefix)
327 insnContext = IC_VEX_L;
328 else if (Prefix == X86Local::XD || Prefix == X86Local::T8XD ||
329 Prefix == X86Local::TAXD)
330 insnContext = IC_VEX_XD;
331 else if (Prefix == X86Local::XS || Prefix == X86Local::T8XS)
332 insnContext = IC_VEX_XS;
334 insnContext = IC_VEX;
335 } else if (Is64Bit || HasREX_WPrefix) {
336 if (HasREX_WPrefix && HasOpSizePrefix)
337 insnContext = IC_64BIT_REXW_OPSIZE;
338 else if (HasOpSizePrefix && (Prefix == X86Local::XD ||
339 Prefix == X86Local::T8XD ||
340 Prefix == X86Local::TAXD))
341 insnContext = IC_64BIT_XD_OPSIZE;
342 else if (HasOpSizePrefix &&
343 (Prefix == X86Local::XS || Prefix == X86Local::T8XS))
344 insnContext = IC_64BIT_XS_OPSIZE;
345 else if (HasOpSizePrefix)
346 insnContext = IC_64BIT_OPSIZE;
347 else if (HasAdSizePrefix)
348 insnContext = IC_64BIT_ADSIZE;
349 else if (HasREX_WPrefix &&
350 (Prefix == X86Local::XS || Prefix == X86Local::T8XS))
351 insnContext = IC_64BIT_REXW_XS;
352 else if (HasREX_WPrefix && (Prefix == X86Local::XD ||
353 Prefix == X86Local::T8XD ||
354 Prefix == X86Local::TAXD))
355 insnContext = IC_64BIT_REXW_XD;
356 else if (Prefix == X86Local::XD || Prefix == X86Local::T8XD ||
357 Prefix == X86Local::TAXD)
358 insnContext = IC_64BIT_XD;
359 else if (Prefix == X86Local::XS || Prefix == X86Local::T8XS)
360 insnContext = IC_64BIT_XS;
361 else if (HasREX_WPrefix)
362 insnContext = IC_64BIT_REXW;
364 insnContext = IC_64BIT;
366 if (HasOpSizePrefix && (Prefix == X86Local::XD ||
367 Prefix == X86Local::T8XD ||
368 Prefix == X86Local::TAXD))
369 insnContext = IC_XD_OPSIZE;
370 else if (HasOpSizePrefix &&
371 (Prefix == X86Local::XS || Prefix == X86Local::T8XS))
372 insnContext = IC_XS_OPSIZE;
373 else if (HasOpSizePrefix)
374 insnContext = IC_OPSIZE;
375 else if (HasAdSizePrefix)
376 insnContext = IC_ADSIZE;
377 else if (Prefix == X86Local::XD || Prefix == X86Local::T8XD ||
378 Prefix == X86Local::TAXD)
380 else if (Prefix == X86Local::XS || Prefix == X86Local::T8XS ||
381 Prefix == X86Local::REP)
390 RecognizableInstr::filter_ret RecognizableInstr::filter() const {
395 // Filter out intrinsics
397 assert(Rec->isSubClassOf("X86Inst") && "Can only filter X86 instructions");
399 if (Form == X86Local::Pseudo ||
400 (IsCodeGenOnly && Name.find("_REV") == Name.npos))
401 return FILTER_STRONG;
403 if (Form == X86Local::MRMInitReg)
404 return FILTER_STRONG;
407 // Filter out artificial instructions but leave in the LOCK_PREFIX so it is
408 // printed as a separate "instruction".
410 if (Name.find("_Int") != Name.npos ||
411 Name.find("Int_") != Name.npos ||
412 Name.find("_NOREX") != Name.npos)
413 return FILTER_STRONG;
415 // Filter out instructions with segment override prefixes.
416 // They're too messy to handle now and we'll special case them if needed.
419 return FILTER_STRONG;
421 // Filter out instructions that can't be printed.
423 if (AsmString.size() == 0)
424 return FILTER_STRONG;
426 // Filter out instructions with subreg operands.
428 if (AsmString.find("subreg") != AsmString.npos)
429 return FILTER_STRONG;
436 // Filter out instructions with a LOCK prefix;
437 // prefer forms that do not have the prefix
441 // Filter out alternate forms of AVX instructions
442 if (Name.find("_alt") != Name.npos ||
443 Name.find("XrYr") != Name.npos ||
444 (Name.find("r64r") != Name.npos && Name.find("r64r64") == Name.npos) ||
445 Name.find("_64mr") != Name.npos ||
446 Name.find("Xrr") != Name.npos ||
447 Name.find("rr64") != Name.npos)
452 if (Name.find("PCMPISTRI") != Name.npos && Name != "PCMPISTRI")
454 if (Name.find("PCMPESTRI") != Name.npos && Name != "PCMPESTRI")
457 if (Name.find("MOV") != Name.npos && Name.find("r0") != Name.npos)
459 if (Name.find("MOVZ") != Name.npos && Name.find("MOVZX") == Name.npos)
461 if (Name.find("Fs") != Name.npos)
463 if (Name == "PUSH64i16" ||
464 Name == "MOVPQI2QImr" ||
465 Name == "VMOVPQI2QImr" ||
466 Name == "MMX_MOVD64rrv164" ||
467 Name == "MOV64ri64i32" ||
468 Name == "VMASKMOVDQU64" ||
469 Name == "VEXTRACTPSrr64" ||
470 Name == "VMOVQd64rr" ||
471 Name == "VMOVQs64rr")
474 if (HasFROperands && Name.find("MOV") != Name.npos &&
475 ((Name.find("2") != Name.npos && Name.find("32") == Name.npos) ||
476 (Name.find("to") != Name.npos)))
477 return FILTER_STRONG;
479 return FILTER_NORMAL;
482 bool RecognizableInstr::hasFROperands() const {
483 const std::vector<CGIOperandList::OperandInfo> &OperandList = *Operands;
484 unsigned numOperands = OperandList.size();
486 for (unsigned operandIndex = 0; operandIndex < numOperands; ++operandIndex) {
487 const std::string &recName = OperandList[operandIndex].Rec->getName();
489 if (recName.find("FR") != recName.npos)
495 bool RecognizableInstr::has256BitOperands() const {
496 const std::vector<CGIOperandList::OperandInfo> &OperandList = *Operands;
497 unsigned numOperands = OperandList.size();
499 for (unsigned operandIndex = 0; operandIndex < numOperands; ++operandIndex) {
500 const std::string &recName = OperandList[operandIndex].Rec->getName();
502 if (!recName.compare("VR256")) {
509 void RecognizableInstr::handleOperand(bool optional, unsigned &operandIndex,
510 unsigned &physicalOperandIndex,
511 unsigned &numPhysicalOperands,
512 const unsigned *operandMapping,
513 OperandEncoding (*encodingFromString)
515 bool hasOpSizePrefix)) {
517 if (physicalOperandIndex >= numPhysicalOperands)
520 assert(physicalOperandIndex < numPhysicalOperands);
523 while (operandMapping[operandIndex] != operandIndex) {
524 Spec->operands[operandIndex].encoding = ENCODING_DUP;
525 Spec->operands[operandIndex].type =
526 (OperandType)(TYPE_DUP0 + operandMapping[operandIndex]);
530 const std::string &typeName = (*Operands)[operandIndex].Rec->getName();
532 Spec->operands[operandIndex].encoding = encodingFromString(typeName,
534 Spec->operands[operandIndex].type = typeFromString(typeName,
540 ++physicalOperandIndex;
543 void RecognizableInstr::emitInstructionSpecifier(DisassemblerTables &tables) {
546 if (!ShouldBeEmitted)
551 Spec->filtered = true;
554 ShouldBeEmitted = false;
560 Spec->insnContext = insnContext();
562 const std::vector<CGIOperandList::OperandInfo> &OperandList = *Operands;
564 unsigned numOperands = OperandList.size();
565 unsigned numPhysicalOperands = 0;
567 // operandMapping maps from operands in OperandList to their originals.
568 // If operandMapping[i] != i, then the entry is a duplicate.
569 unsigned operandMapping[X86_MAX_OPERANDS];
570 assert(numOperands <= X86_MAX_OPERANDS && "X86_MAX_OPERANDS is not large enough");
572 for (unsigned operandIndex = 0; operandIndex < numOperands; ++operandIndex) {
573 if (OperandList[operandIndex].Constraints.size()) {
574 const CGIOperandList::ConstraintInfo &Constraint =
575 OperandList[operandIndex].Constraints[0];
576 if (Constraint.isTied()) {
577 operandMapping[operandIndex] = operandIndex;
578 operandMapping[Constraint.getTiedOperand()] = operandIndex;
580 ++numPhysicalOperands;
581 operandMapping[operandIndex] = operandIndex;
584 ++numPhysicalOperands;
585 operandMapping[operandIndex] = operandIndex;
589 #define HANDLE_OPERAND(class) \
590 handleOperand(false, \
592 physicalOperandIndex, \
593 numPhysicalOperands, \
595 class##EncodingFromString);
597 #define HANDLE_OPTIONAL(class) \
598 handleOperand(true, \
600 physicalOperandIndex, \
601 numPhysicalOperands, \
603 class##EncodingFromString);
605 // operandIndex should always be < numOperands
606 unsigned operandIndex = 0;
607 // physicalOperandIndex should always be < numPhysicalOperands
608 unsigned physicalOperandIndex = 0;
611 case X86Local::RawFrm:
612 // Operand 1 (optional) is an address or immediate.
613 // Operand 2 (optional) is an immediate.
614 assert(numPhysicalOperands <= 2 &&
615 "Unexpected number of operands for RawFrm");
616 HANDLE_OPTIONAL(relocation)
617 HANDLE_OPTIONAL(immediate)
619 case X86Local::AddRegFrm:
620 // Operand 1 is added to the opcode.
621 // Operand 2 (optional) is an address.
622 assert(numPhysicalOperands >= 1 && numPhysicalOperands <= 2 &&
623 "Unexpected number of operands for AddRegFrm");
624 HANDLE_OPERAND(opcodeModifier)
625 HANDLE_OPTIONAL(relocation)
627 case X86Local::MRMDestReg:
628 // Operand 1 is a register operand in the R/M field.
629 // Operand 2 is a register operand in the Reg/Opcode field.
630 // - In AVX, there is a register operand in the VEX.vvvv field here -
631 // Operand 3 (optional) is an immediate.
633 assert(numPhysicalOperands >= 3 && numPhysicalOperands <= 4 &&
634 "Unexpected number of operands for MRMDestRegFrm with VEX_4V");
636 assert(numPhysicalOperands >= 2 && numPhysicalOperands <= 3 &&
637 "Unexpected number of operands for MRMDestRegFrm");
639 HANDLE_OPERAND(rmRegister)
642 // FIXME: In AVX, the register below becomes the one encoded
643 // in ModRMVEX and the one above the one in the VEX.VVVV field
644 HANDLE_OPERAND(vvvvRegister)
646 HANDLE_OPERAND(roRegister)
647 HANDLE_OPTIONAL(immediate)
649 case X86Local::MRMDestMem:
650 // Operand 1 is a memory operand (possibly SIB-extended)
651 // Operand 2 is a register operand in the Reg/Opcode field.
652 // - In AVX, there is a register operand in the VEX.vvvv field here -
653 // Operand 3 (optional) is an immediate.
655 assert(numPhysicalOperands >= 3 && numPhysicalOperands <= 4 &&
656 "Unexpected number of operands for MRMDestMemFrm with VEX_4V");
658 assert(numPhysicalOperands >= 2 && numPhysicalOperands <= 3 &&
659 "Unexpected number of operands for MRMDestMemFrm");
660 HANDLE_OPERAND(memory)
663 // FIXME: In AVX, the register below becomes the one encoded
664 // in ModRMVEX and the one above the one in the VEX.VVVV field
665 HANDLE_OPERAND(vvvvRegister)
667 HANDLE_OPERAND(roRegister)
668 HANDLE_OPTIONAL(immediate)
670 case X86Local::MRMSrcReg:
671 // Operand 1 is a register operand in the Reg/Opcode field.
672 // Operand 2 is a register operand in the R/M field.
673 // - In AVX, there is a register operand in the VEX.vvvv field here -
674 // Operand 3 (optional) is an immediate.
675 // Operand 4 (optional) is an immediate.
677 if (HasVEX_4VPrefix || HasVEX_4VOp3Prefix)
678 assert(numPhysicalOperands >= 3 && numPhysicalOperands <= 5 &&
679 "Unexpected number of operands for MRMSrcRegFrm with VEX_4V");
681 assert(numPhysicalOperands >= 2 && numPhysicalOperands <= 4 &&
682 "Unexpected number of operands for MRMSrcRegFrm");
684 HANDLE_OPERAND(roRegister)
687 // FIXME: In AVX, the register below becomes the one encoded
688 // in ModRMVEX and the one above the one in the VEX.VVVV field
689 HANDLE_OPERAND(vvvvRegister)
692 HANDLE_OPERAND(immediate)
694 HANDLE_OPERAND(rmRegister)
696 if (HasVEX_4VOp3Prefix)
697 HANDLE_OPERAND(vvvvRegister)
699 if (!HasMemOp4Prefix)
700 HANDLE_OPTIONAL(immediate)
701 HANDLE_OPTIONAL(immediate) // above might be a register in 7:4
702 HANDLE_OPTIONAL(immediate)
704 case X86Local::MRMSrcMem:
705 // Operand 1 is a register operand in the Reg/Opcode field.
706 // Operand 2 is a memory operand (possibly SIB-extended)
707 // - In AVX, there is a register operand in the VEX.vvvv field here -
708 // Operand 3 (optional) is an immediate.
710 if (HasVEX_4VPrefix || HasVEX_4VOp3Prefix)
711 assert(numPhysicalOperands >= 3 && numPhysicalOperands <= 5 &&
712 "Unexpected number of operands for MRMSrcMemFrm with VEX_4V");
714 assert(numPhysicalOperands >= 2 && numPhysicalOperands <= 3 &&
715 "Unexpected number of operands for MRMSrcMemFrm");
717 HANDLE_OPERAND(roRegister)
720 // FIXME: In AVX, the register below becomes the one encoded
721 // in ModRMVEX and the one above the one in the VEX.VVVV field
722 HANDLE_OPERAND(vvvvRegister)
725 HANDLE_OPERAND(immediate)
727 HANDLE_OPERAND(memory)
729 if (HasVEX_4VOp3Prefix)
730 HANDLE_OPERAND(vvvvRegister)
732 if (!HasMemOp4Prefix)
733 HANDLE_OPTIONAL(immediate)
734 HANDLE_OPTIONAL(immediate) // above might be a register in 7:4
736 case X86Local::MRM0r:
737 case X86Local::MRM1r:
738 case X86Local::MRM2r:
739 case X86Local::MRM3r:
740 case X86Local::MRM4r:
741 case X86Local::MRM5r:
742 case X86Local::MRM6r:
743 case X86Local::MRM7r:
744 // Operand 1 is a register operand in the R/M field.
745 // Operand 2 (optional) is an immediate or relocation.
746 // Operand 3 (optional) is an immediate.
748 assert(numPhysicalOperands <= 3 &&
749 "Unexpected number of operands for MRMnRFrm with VEX_4V");
751 assert(numPhysicalOperands <= 3 &&
752 "Unexpected number of operands for MRMnRFrm");
754 HANDLE_OPERAND(vvvvRegister)
755 HANDLE_OPTIONAL(rmRegister)
756 HANDLE_OPTIONAL(relocation)
757 HANDLE_OPTIONAL(immediate)
759 case X86Local::MRM0m:
760 case X86Local::MRM1m:
761 case X86Local::MRM2m:
762 case X86Local::MRM3m:
763 case X86Local::MRM4m:
764 case X86Local::MRM5m:
765 case X86Local::MRM6m:
766 case X86Local::MRM7m:
767 // Operand 1 is a memory operand (possibly SIB-extended)
768 // Operand 2 (optional) is an immediate or relocation.
770 assert(numPhysicalOperands >= 2 && numPhysicalOperands <= 3 &&
771 "Unexpected number of operands for MRMnMFrm");
773 assert(numPhysicalOperands >= 1 && numPhysicalOperands <= 2 &&
774 "Unexpected number of operands for MRMnMFrm");
776 HANDLE_OPERAND(vvvvRegister)
777 HANDLE_OPERAND(memory)
778 HANDLE_OPTIONAL(relocation)
780 case X86Local::RawFrmImm8:
781 // operand 1 is a 16-bit immediate
782 // operand 2 is an 8-bit immediate
783 assert(numPhysicalOperands == 2 &&
784 "Unexpected number of operands for X86Local::RawFrmImm8");
785 HANDLE_OPERAND(immediate)
786 HANDLE_OPERAND(immediate)
788 case X86Local::RawFrmImm16:
789 // operand 1 is a 16-bit immediate
790 // operand 2 is a 16-bit immediate
791 HANDLE_OPERAND(immediate)
792 HANDLE_OPERAND(immediate)
794 case X86Local::MRMInitReg:
799 #undef HANDLE_OPERAND
800 #undef HANDLE_OPTIONAL
803 void RecognizableInstr::emitDecodePath(DisassemblerTables &tables) const {
804 // Special cases where the LLVM tables are not complete
806 #define MAP(from, to) \
807 case X86Local::MRM_##from: \
808 filter = new ExactFilter(0x##from); \
811 OpcodeType opcodeType = (OpcodeType)-1;
813 ModRMFilter* filter = NULL;
814 uint8_t opcodeToSet = 0;
817 // Extended two-byte opcodes can start with f2 0f, f3 0f, or 0f
821 opcodeType = TWOBYTE;
825 if (needsModRMForDecode(Form))
826 filter = new ModFilter(isRegFormat(Form));
828 filter = new DumbFilter();
830 #define EXTENSION_TABLE(n) case 0x##n:
831 TWO_BYTE_EXTENSION_TABLES
832 #undef EXTENSION_TABLE
835 llvm_unreachable("Unhandled two-byte extended opcode");
836 case X86Local::MRM0r:
837 case X86Local::MRM1r:
838 case X86Local::MRM2r:
839 case X86Local::MRM3r:
840 case X86Local::MRM4r:
841 case X86Local::MRM5r:
842 case X86Local::MRM6r:
843 case X86Local::MRM7r:
844 filter = new ExtendedFilter(true, Form - X86Local::MRM0r);
846 case X86Local::MRM0m:
847 case X86Local::MRM1m:
848 case X86Local::MRM2m:
849 case X86Local::MRM3m:
850 case X86Local::MRM4m:
851 case X86Local::MRM5m:
852 case X86Local::MRM6m:
853 case X86Local::MRM7m:
854 filter = new ExtendedFilter(false, Form - X86Local::MRM0m);
860 opcodeToSet = Opcode;
865 opcodeType = THREEBYTE_38;
868 if (needsModRMForDecode(Form))
869 filter = new ModFilter(isRegFormat(Form));
871 filter = new DumbFilter();
873 #define EXTENSION_TABLE(n) case 0x##n:
874 THREE_BYTE_38_EXTENSION_TABLES
875 #undef EXTENSION_TABLE
878 llvm_unreachable("Unhandled two-byte extended opcode");
879 case X86Local::MRM0r:
880 case X86Local::MRM1r:
881 case X86Local::MRM2r:
882 case X86Local::MRM3r:
883 case X86Local::MRM4r:
884 case X86Local::MRM5r:
885 case X86Local::MRM6r:
886 case X86Local::MRM7r:
887 filter = new ExtendedFilter(true, Form - X86Local::MRM0r);
889 case X86Local::MRM0m:
890 case X86Local::MRM1m:
891 case X86Local::MRM2m:
892 case X86Local::MRM3m:
893 case X86Local::MRM4m:
894 case X86Local::MRM5m:
895 case X86Local::MRM6m:
896 case X86Local::MRM7m:
897 filter = new ExtendedFilter(false, Form - X86Local::MRM0m);
903 opcodeToSet = Opcode;
907 opcodeType = THREEBYTE_3A;
908 if (needsModRMForDecode(Form))
909 filter = new ModFilter(isRegFormat(Form));
911 filter = new DumbFilter();
912 opcodeToSet = Opcode;
915 opcodeType = THREEBYTE_A6;
916 if (needsModRMForDecode(Form))
917 filter = new ModFilter(isRegFormat(Form));
919 filter = new DumbFilter();
920 opcodeToSet = Opcode;
923 opcodeType = THREEBYTE_A7;
924 if (needsModRMForDecode(Form))
925 filter = new ModFilter(isRegFormat(Form));
927 filter = new DumbFilter();
928 opcodeToSet = Opcode;
938 assert(Opcode >= 0xc0 && "Unexpected opcode for an escape opcode");
939 opcodeType = ONEBYTE;
940 if (Form == X86Local::AddRegFrm) {
941 Spec->modifierType = MODIFIER_MODRM;
942 Spec->modifierBase = Opcode;
943 filter = new AddRegEscapeFilter(Opcode);
945 filter = new EscapeFilter(true, Opcode);
947 opcodeToSet = 0xd8 + (Prefix - X86Local::D8);
951 opcodeType = ONEBYTE;
953 #define EXTENSION_TABLE(n) case 0x##n:
954 ONE_BYTE_EXTENSION_TABLES
955 #undef EXTENSION_TABLE
958 llvm_unreachable("Fell through the cracks of a single-byte "
960 case X86Local::MRM0r:
961 case X86Local::MRM1r:
962 case X86Local::MRM2r:
963 case X86Local::MRM3r:
964 case X86Local::MRM4r:
965 case X86Local::MRM5r:
966 case X86Local::MRM6r:
967 case X86Local::MRM7r:
968 filter = new ExtendedFilter(true, Form - X86Local::MRM0r);
970 case X86Local::MRM0m:
971 case X86Local::MRM1m:
972 case X86Local::MRM2m:
973 case X86Local::MRM3m:
974 case X86Local::MRM4m:
975 case X86Local::MRM5m:
976 case X86Local::MRM6m:
977 case X86Local::MRM7m:
978 filter = new ExtendedFilter(false, Form - X86Local::MRM0m);
991 filter = new EscapeFilter(false, Form - X86Local::MRM0m);
994 if (needsModRMForDecode(Form))
995 filter = new ModFilter(isRegFormat(Form));
997 filter = new DumbFilter();
1000 opcodeToSet = Opcode;
1001 } // switch (Prefix)
1003 assert(opcodeType != (OpcodeType)-1 &&
1004 "Opcode type not set");
1005 assert(filter && "Filter not set");
1007 if (Form == X86Local::AddRegFrm) {
1008 if(Spec->modifierType != MODIFIER_MODRM) {
1009 assert(opcodeToSet < 0xf9 &&
1010 "Not enough room for all ADDREG_FRM operands");
1012 uint8_t currentOpcode;
1014 for (currentOpcode = opcodeToSet;
1015 currentOpcode < opcodeToSet + 8;
1017 tables.setTableFields(opcodeType,
1021 UID, Is32Bit, IgnoresVEX_L);
1023 Spec->modifierType = MODIFIER_OPCODE;
1024 Spec->modifierBase = opcodeToSet;
1026 // modifierBase was set where MODIFIER_MODRM was set
1027 tables.setTableFields(opcodeType,
1031 UID, Is32Bit, IgnoresVEX_L);
1034 tables.setTableFields(opcodeType,
1038 UID, Is32Bit, IgnoresVEX_L);
1040 Spec->modifierType = MODIFIER_NONE;
1041 Spec->modifierBase = opcodeToSet;
1049 #define TYPE(str, type) if (s == str) return type;
1050 OperandType RecognizableInstr::typeFromString(const std::string &s,
1052 bool hasREX_WPrefix,
1053 bool hasOpSizePrefix) {
1055 // For SSE instructions, we ignore the OpSize prefix and force operand
1057 TYPE("GR16", TYPE_R16)
1058 TYPE("GR32", TYPE_R32)
1059 TYPE("GR64", TYPE_R64)
1061 if(hasREX_WPrefix) {
1062 // For instructions with a REX_W prefix, a declared 32-bit register encoding
1064 TYPE("GR32", TYPE_R32)
1066 if(!hasOpSizePrefix) {
1067 // For instructions without an OpSize prefix, a declared 16-bit register or
1068 // immediate encoding is special.
1069 TYPE("GR16", TYPE_R16)
1070 TYPE("i16imm", TYPE_IMM16)
1072 TYPE("i16mem", TYPE_Mv)
1073 TYPE("i16imm", TYPE_IMMv)
1074 TYPE("i16i8imm", TYPE_IMMv)
1075 TYPE("GR16", TYPE_Rv)
1076 TYPE("i32mem", TYPE_Mv)
1077 TYPE("i32imm", TYPE_IMMv)
1078 TYPE("i32i8imm", TYPE_IMM32)
1079 TYPE("u32u8imm", TYPE_IMM32)
1080 TYPE("GR32", TYPE_Rv)
1081 TYPE("i64mem", TYPE_Mv)
1082 TYPE("i64i32imm", TYPE_IMM64)
1083 TYPE("i64i8imm", TYPE_IMM64)
1084 TYPE("GR64", TYPE_R64)
1085 TYPE("i8mem", TYPE_M8)
1086 TYPE("i8imm", TYPE_IMM8)
1087 TYPE("GR8", TYPE_R8)
1088 TYPE("VR128", TYPE_XMM128)
1089 TYPE("f128mem", TYPE_M128)
1090 TYPE("f256mem", TYPE_M256)
1091 TYPE("FR64", TYPE_XMM64)
1092 TYPE("f64mem", TYPE_M64FP)
1093 TYPE("sdmem", TYPE_M64FP)
1094 TYPE("FR32", TYPE_XMM32)
1095 TYPE("f32mem", TYPE_M32FP)
1096 TYPE("ssmem", TYPE_M32FP)
1097 TYPE("RST", TYPE_ST)
1098 TYPE("i128mem", TYPE_M128)
1099 TYPE("i256mem", TYPE_M256)
1100 TYPE("i64i32imm_pcrel", TYPE_REL64)
1101 TYPE("i16imm_pcrel", TYPE_REL16)
1102 TYPE("i32imm_pcrel", TYPE_REL32)
1103 TYPE("SSECC", TYPE_IMM3)
1104 TYPE("AVXCC", TYPE_IMM5)
1105 TYPE("brtarget", TYPE_RELv)
1106 TYPE("uncondbrtarget", TYPE_RELv)
1107 TYPE("brtarget8", TYPE_REL8)
1108 TYPE("f80mem", TYPE_M80FP)
1109 TYPE("lea32mem", TYPE_LEA)
1110 TYPE("lea64_32mem", TYPE_LEA)
1111 TYPE("lea64mem", TYPE_LEA)
1112 TYPE("VR64", TYPE_MM64)
1113 TYPE("i64imm", TYPE_IMMv)
1114 TYPE("opaque32mem", TYPE_M1616)
1115 TYPE("opaque48mem", TYPE_M1632)
1116 TYPE("opaque80mem", TYPE_M1664)
1117 TYPE("opaque512mem", TYPE_M512)
1118 TYPE("SEGMENT_REG", TYPE_SEGMENTREG)
1119 TYPE("DEBUG_REG", TYPE_DEBUGREG)
1120 TYPE("CONTROL_REG", TYPE_CONTROLREG)
1121 TYPE("offset8", TYPE_MOFFS8)
1122 TYPE("offset16", TYPE_MOFFS16)
1123 TYPE("offset32", TYPE_MOFFS32)
1124 TYPE("offset64", TYPE_MOFFS64)
1125 TYPE("VR256", TYPE_XMM256)
1126 TYPE("GR16_NOAX", TYPE_Rv)
1127 TYPE("GR32_NOAX", TYPE_Rv)
1128 TYPE("GR64_NOAX", TYPE_R64)
1129 TYPE("vx32mem", TYPE_M32)
1130 TYPE("vy32mem", TYPE_M32)
1131 TYPE("vx64mem", TYPE_M64)
1132 TYPE("vy64mem", TYPE_M64)
1133 errs() << "Unhandled type string " << s << "\n";
1134 llvm_unreachable("Unhandled type string");
1138 #define ENCODING(str, encoding) if (s == str) return encoding;
1139 OperandEncoding RecognizableInstr::immediateEncodingFromString
1140 (const std::string &s,
1141 bool hasOpSizePrefix) {
1142 if(!hasOpSizePrefix) {
1143 // For instructions without an OpSize prefix, a declared 16-bit register or
1144 // immediate encoding is special.
1145 ENCODING("i16imm", ENCODING_IW)
1147 ENCODING("i32i8imm", ENCODING_IB)
1148 ENCODING("u32u8imm", ENCODING_IB)
1149 ENCODING("SSECC", ENCODING_IB)
1150 ENCODING("AVXCC", ENCODING_IB)
1151 ENCODING("i16imm", ENCODING_Iv)
1152 ENCODING("i16i8imm", ENCODING_IB)
1153 ENCODING("i32imm", ENCODING_Iv)
1154 ENCODING("i64i32imm", ENCODING_ID)
1155 ENCODING("i64i8imm", ENCODING_IB)
1156 ENCODING("i8imm", ENCODING_IB)
1157 // This is not a typo. Instructions like BLENDVPD put
1158 // register IDs in 8-bit immediates nowadays.
1159 ENCODING("VR256", ENCODING_IB)
1160 ENCODING("VR128", ENCODING_IB)
1161 errs() << "Unhandled immediate encoding " << s << "\n";
1162 llvm_unreachable("Unhandled immediate encoding");
1165 OperandEncoding RecognizableInstr::rmRegisterEncodingFromString
1166 (const std::string &s,
1167 bool hasOpSizePrefix) {
1168 ENCODING("GR16", ENCODING_RM)
1169 ENCODING("GR32", ENCODING_RM)
1170 ENCODING("GR64", ENCODING_RM)
1171 ENCODING("GR8", ENCODING_RM)
1172 ENCODING("VR128", ENCODING_RM)
1173 ENCODING("FR64", ENCODING_RM)
1174 ENCODING("FR32", ENCODING_RM)
1175 ENCODING("VR64", ENCODING_RM)
1176 ENCODING("VR256", ENCODING_RM)
1177 errs() << "Unhandled R/M register encoding " << s << "\n";
1178 llvm_unreachable("Unhandled R/M register encoding");
1181 OperandEncoding RecognizableInstr::roRegisterEncodingFromString
1182 (const std::string &s,
1183 bool hasOpSizePrefix) {
1184 ENCODING("GR16", ENCODING_REG)
1185 ENCODING("GR32", ENCODING_REG)
1186 ENCODING("GR64", ENCODING_REG)
1187 ENCODING("GR8", ENCODING_REG)
1188 ENCODING("VR128", ENCODING_REG)
1189 ENCODING("FR64", ENCODING_REG)
1190 ENCODING("FR32", ENCODING_REG)
1191 ENCODING("VR64", ENCODING_REG)
1192 ENCODING("SEGMENT_REG", ENCODING_REG)
1193 ENCODING("DEBUG_REG", ENCODING_REG)
1194 ENCODING("CONTROL_REG", ENCODING_REG)
1195 ENCODING("VR256", ENCODING_REG)
1196 errs() << "Unhandled reg/opcode register encoding " << s << "\n";
1197 llvm_unreachable("Unhandled reg/opcode register encoding");
1200 OperandEncoding RecognizableInstr::vvvvRegisterEncodingFromString
1201 (const std::string &s,
1202 bool hasOpSizePrefix) {
1203 ENCODING("GR32", ENCODING_VVVV)
1204 ENCODING("GR64", ENCODING_VVVV)
1205 ENCODING("FR32", ENCODING_VVVV)
1206 ENCODING("FR64", ENCODING_VVVV)
1207 ENCODING("VR128", ENCODING_VVVV)
1208 ENCODING("VR256", ENCODING_VVVV)
1209 errs() << "Unhandled VEX.vvvv register encoding " << s << "\n";
1210 llvm_unreachable("Unhandled VEX.vvvv register encoding");
1213 OperandEncoding RecognizableInstr::memoryEncodingFromString
1214 (const std::string &s,
1215 bool hasOpSizePrefix) {
1216 ENCODING("i16mem", ENCODING_RM)
1217 ENCODING("i32mem", ENCODING_RM)
1218 ENCODING("i64mem", ENCODING_RM)
1219 ENCODING("i8mem", ENCODING_RM)
1220 ENCODING("ssmem", ENCODING_RM)
1221 ENCODING("sdmem", ENCODING_RM)
1222 ENCODING("f128mem", ENCODING_RM)
1223 ENCODING("f256mem", ENCODING_RM)
1224 ENCODING("f64mem", ENCODING_RM)
1225 ENCODING("f32mem", ENCODING_RM)
1226 ENCODING("i128mem", ENCODING_RM)
1227 ENCODING("i256mem", ENCODING_RM)
1228 ENCODING("f80mem", ENCODING_RM)
1229 ENCODING("lea32mem", ENCODING_RM)
1230 ENCODING("lea64_32mem", ENCODING_RM)
1231 ENCODING("lea64mem", ENCODING_RM)
1232 ENCODING("opaque32mem", ENCODING_RM)
1233 ENCODING("opaque48mem", ENCODING_RM)
1234 ENCODING("opaque80mem", ENCODING_RM)
1235 ENCODING("opaque512mem", ENCODING_RM)
1236 ENCODING("vx32mem", ENCODING_RM)
1237 ENCODING("vy32mem", ENCODING_RM)
1238 ENCODING("vx64mem", ENCODING_RM)
1239 ENCODING("vy64mem", ENCODING_RM)
1240 errs() << "Unhandled memory encoding " << s << "\n";
1241 llvm_unreachable("Unhandled memory encoding");
1244 OperandEncoding RecognizableInstr::relocationEncodingFromString
1245 (const std::string &s,
1246 bool hasOpSizePrefix) {
1247 if(!hasOpSizePrefix) {
1248 // For instructions without an OpSize prefix, a declared 16-bit register or
1249 // immediate encoding is special.
1250 ENCODING("i16imm", ENCODING_IW)
1252 ENCODING("i16imm", ENCODING_Iv)
1253 ENCODING("i16i8imm", ENCODING_IB)
1254 ENCODING("i32imm", ENCODING_Iv)
1255 ENCODING("i32i8imm", ENCODING_IB)
1256 ENCODING("i64i32imm", ENCODING_ID)
1257 ENCODING("i64i8imm", ENCODING_IB)
1258 ENCODING("i8imm", ENCODING_IB)
1259 ENCODING("i64i32imm_pcrel", ENCODING_ID)
1260 ENCODING("i16imm_pcrel", ENCODING_IW)
1261 ENCODING("i32imm_pcrel", ENCODING_ID)
1262 ENCODING("brtarget", ENCODING_Iv)
1263 ENCODING("brtarget8", ENCODING_IB)
1264 ENCODING("i64imm", ENCODING_IO)
1265 ENCODING("offset8", ENCODING_Ia)
1266 ENCODING("offset16", ENCODING_Ia)
1267 ENCODING("offset32", ENCODING_Ia)
1268 ENCODING("offset64", ENCODING_Ia)
1269 errs() << "Unhandled relocation encoding " << s << "\n";
1270 llvm_unreachable("Unhandled relocation encoding");
1273 OperandEncoding RecognizableInstr::opcodeModifierEncodingFromString
1274 (const std::string &s,
1275 bool hasOpSizePrefix) {
1276 ENCODING("RST", ENCODING_I)
1277 ENCODING("GR32", ENCODING_Rv)
1278 ENCODING("GR64", ENCODING_RO)
1279 ENCODING("GR16", ENCODING_Rv)
1280 ENCODING("GR8", ENCODING_RB)
1281 ENCODING("GR16_NOAX", ENCODING_Rv)
1282 ENCODING("GR32_NOAX", ENCODING_Rv)
1283 ENCODING("GR64_NOAX", ENCODING_RO)
1284 errs() << "Unhandled opcode modifier encoding " << s << "\n";
1285 llvm_unreachable("Unhandled opcode modifier encoding");