1 //===- MipsLegalizerInfo.cpp ------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 /// This file implements the targeting of the Machinelegalizer class for Mips.
10 /// \todo This should be generated by TableGen.
11 //===----------------------------------------------------------------------===//
12 
13 #include "MipsLegalizerInfo.h"
14 #include "MipsTargetMachine.h"
15 #include "llvm/CodeGen/GlobalISel/LegalizerHelper.h"
16 #include "llvm/IR/IntrinsicsMips.h"
17 
18 using namespace llvm;
19 
20 struct TypesAndMemOps {
21   LLT ValTy;
22   LLT PtrTy;
23   unsigned MemSize;
24   bool SystemSupportsUnalignedAccess;
25 };
26 
27 // Assumes power of 2 memory size. Subtargets that have only naturally-aligned
28 // memory access need to perform additional legalization here.
29 static bool isUnalignedMemmoryAccess(uint64_t MemSize, uint64_t AlignInBits) {
30   assert(isPowerOf2_64(MemSize) && "Expected power of 2 memory size");
31   assert(isPowerOf2_64(AlignInBits) && "Expected power of 2 align");
32   if (MemSize > AlignInBits)
33     return true;
34   return false;
35 }
36 
37 static bool
38 CheckTy0Ty1MemSizeAlign(const LegalityQuery &Query,
39                         std::initializer_list<TypesAndMemOps> SupportedValues) {
40   unsigned QueryMemSize = Query.MMODescrs[0].SizeInBits;
41 
42   // Non power of two memory access is never legal.
43   if (!isPowerOf2_64(QueryMemSize))
44     return false;
45 
46   for (auto &Val : SupportedValues) {
47     if (Val.ValTy != Query.Types[0])
48       continue;
49     if (Val.PtrTy != Query.Types[1])
50       continue;
51     if (Val.MemSize != QueryMemSize)
52       continue;
53     if (!Val.SystemSupportsUnalignedAccess &&
54         isUnalignedMemmoryAccess(QueryMemSize, Query.MMODescrs[0].AlignInBits))
55       return false;
56     return true;
57   }
58   return false;
59 }
60 
61 static bool CheckTyN(unsigned N, const LegalityQuery &Query,
62                      std::initializer_list<LLT> SupportedValues) {
63   for (auto &Val : SupportedValues)
64     if (Val == Query.Types[N])
65       return true;
66   return false;
67 }
68 
69 MipsLegalizerInfo::MipsLegalizerInfo(const MipsSubtarget &ST) {
70   using namespace TargetOpcode;
71 
72   const LLT s1 = LLT::scalar(1);
73   const LLT s32 = LLT::scalar(32);
74   const LLT s64 = LLT::scalar(64);
75   const LLT v16s8 = LLT::vector(16, 8);
76   const LLT v8s16 = LLT::vector(8, 16);
77   const LLT v4s32 = LLT::vector(4, 32);
78   const LLT v2s64 = LLT::vector(2, 64);
79   const LLT p0 = LLT::pointer(0, 32);
80 
81   getActionDefinitionsBuilder({G_ADD, G_SUB, G_MUL})
82       .legalIf([=, &ST](const LegalityQuery &Query) {
83         if (CheckTyN(0, Query, {s32}))
84           return true;
85         if (ST.hasMSA() && CheckTyN(0, Query, {v16s8, v8s16, v4s32, v2s64}))
86           return true;
87         return false;
88       })
89       .clampScalar(0, s32, s32);
90 
91   getActionDefinitionsBuilder({G_UADDO, G_UADDE, G_USUBO, G_USUBE, G_UMULO})
92       .lowerFor({{s32, s1}});
93 
94   getActionDefinitionsBuilder(G_UMULH)
95       .legalFor({s32})
96       .maxScalar(0, s32);
97 
98   // MIPS32r6 does not have alignment restrictions for memory access.
99   // For MIPS32r5 and older memory access must be naturally-aligned i.e. aligned
100   // to at least a multiple of its own size. There is however a two instruction
101   // combination that performs 4 byte unaligned access (lwr/lwl and swl/swr)
102   // therefore 4 byte load and store are legal and will use NoAlignRequirements.
103   bool NoAlignRequirements = true;
104 
105   getActionDefinitionsBuilder({G_LOAD, G_STORE})
106       .legalIf([=, &ST](const LegalityQuery &Query) {
107         if (CheckTy0Ty1MemSizeAlign(
108                 Query, {{s32, p0, 8, NoAlignRequirements},
109                         {s32, p0, 16, ST.systemSupportsUnalignedAccess()},
110                         {s32, p0, 32, NoAlignRequirements},
111                         {p0, p0, 32, NoAlignRequirements},
112                         {s64, p0, 64, ST.systemSupportsUnalignedAccess()}}))
113           return true;
114         if (ST.hasMSA() && CheckTy0Ty1MemSizeAlign(
115                                Query, {{v16s8, p0, 128, NoAlignRequirements},
116                                        {v8s16, p0, 128, NoAlignRequirements},
117                                        {v4s32, p0, 128, NoAlignRequirements},
118                                        {v2s64, p0, 128, NoAlignRequirements}}))
119           return true;
120         return false;
121       })
122       // Custom lower scalar memory access, up to 8 bytes, for:
123       // - non-power-of-2 MemSizes
124       // - unaligned 2 or 8 byte MemSizes for MIPS32r5 and older
125       .customIf([=, &ST](const LegalityQuery &Query) {
126         if (!Query.Types[0].isScalar() || Query.Types[1] != p0 ||
127             Query.Types[0] == s1)
128           return false;
129 
130         unsigned Size = Query.Types[0].getSizeInBits();
131         unsigned QueryMemSize = Query.MMODescrs[0].SizeInBits;
132         assert(QueryMemSize <= Size && "Scalar can't hold MemSize");
133 
134         if (Size > 64 || QueryMemSize > 64)
135           return false;
136 
137         if (!isPowerOf2_64(Query.MMODescrs[0].SizeInBits))
138           return true;
139 
140         if (!ST.systemSupportsUnalignedAccess() &&
141             isUnalignedMemmoryAccess(QueryMemSize,
142                                      Query.MMODescrs[0].AlignInBits)) {
143           assert(QueryMemSize != 32 && "4 byte load and store are legal");
144           return true;
145         }
146 
147         return false;
148       })
149       .minScalar(0, s32);
150 
151   getActionDefinitionsBuilder(G_IMPLICIT_DEF)
152       .legalFor({s32, s64});
153 
154   getActionDefinitionsBuilder(G_UNMERGE_VALUES)
155      .legalFor({{s32, s64}});
156 
157   getActionDefinitionsBuilder(G_MERGE_VALUES)
158      .legalFor({{s64, s32}});
159 
160   getActionDefinitionsBuilder({G_ZEXTLOAD, G_SEXTLOAD})
161       .legalForTypesWithMemDesc({{s32, p0, 8, 8},
162                                  {s32, p0, 16, 8}})
163       .clampScalar(0, s32, s32);
164 
165   getActionDefinitionsBuilder({G_ZEXT, G_SEXT, G_ANYEXT})
166       .legalIf([](const LegalityQuery &Query) { return false; })
167       .maxScalar(0, s32);
168 
169   getActionDefinitionsBuilder(G_TRUNC)
170       .legalIf([](const LegalityQuery &Query) { return false; })
171       .maxScalar(1, s32);
172 
173   getActionDefinitionsBuilder(G_SELECT)
174       .legalForCartesianProduct({p0, s32, s64}, {s32})
175       .minScalar(0, s32)
176       .minScalar(1, s32);
177 
178   getActionDefinitionsBuilder(G_BRCOND)
179       .legalFor({s32})
180       .minScalar(0, s32);
181 
182   getActionDefinitionsBuilder(G_BRJT)
183       .legalFor({{p0, s32}});
184 
185   getActionDefinitionsBuilder(G_BRINDIRECT)
186       .legalFor({p0});
187 
188   getActionDefinitionsBuilder(G_PHI)
189       .legalFor({p0, s32, s64})
190       .minScalar(0, s32);
191 
192   getActionDefinitionsBuilder({G_AND, G_OR, G_XOR})
193       .legalFor({s32})
194       .clampScalar(0, s32, s32);
195 
196   getActionDefinitionsBuilder({G_SDIV, G_SREM, G_UDIV, G_UREM})
197       .legalIf([=, &ST](const LegalityQuery &Query) {
198         if (CheckTyN(0, Query, {s32}))
199           return true;
200         if (ST.hasMSA() && CheckTyN(0, Query, {v16s8, v8s16, v4s32, v2s64}))
201           return true;
202         return false;
203       })
204       .minScalar(0, s32)
205       .libcallFor({s64});
206 
207   getActionDefinitionsBuilder({G_SHL, G_ASHR, G_LSHR})
208       .legalFor({{s32, s32}})
209       .clampScalar(1, s32, s32)
210       .clampScalar(0, s32, s32);
211 
212   getActionDefinitionsBuilder(G_ICMP)
213       .legalForCartesianProduct({s32}, {s32, p0})
214       .clampScalar(1, s32, s32)
215       .minScalar(0, s32);
216 
217   getActionDefinitionsBuilder(G_CONSTANT)
218       .legalFor({s32})
219       .clampScalar(0, s32, s32);
220 
221   getActionDefinitionsBuilder({G_PTR_ADD, G_INTTOPTR})
222       .legalFor({{p0, s32}});
223 
224   getActionDefinitionsBuilder(G_PTRTOINT)
225       .legalFor({{s32, p0}});
226 
227   getActionDefinitionsBuilder(G_FRAME_INDEX)
228       .legalFor({p0});
229 
230   getActionDefinitionsBuilder({G_GLOBAL_VALUE, G_JUMP_TABLE})
231       .legalFor({p0});
232 
233   getActionDefinitionsBuilder(G_DYN_STACKALLOC)
234       .lowerFor({{p0, s32}});
235 
236   getActionDefinitionsBuilder(G_VASTART)
237      .legalFor({p0});
238 
239   getActionDefinitionsBuilder(G_BSWAP)
240       .legalIf([=, &ST](const LegalityQuery &Query) {
241         if (ST.hasMips32r2() && CheckTyN(0, Query, {s32}))
242           return true;
243         return false;
244       })
245       .lowerIf([=, &ST](const LegalityQuery &Query) {
246         if (!ST.hasMips32r2() && CheckTyN(0, Query, {s32}))
247           return true;
248         return false;
249       })
250       .maxScalar(0, s32);
251 
252   getActionDefinitionsBuilder(G_BITREVERSE)
253       .lowerFor({s32})
254       .maxScalar(0, s32);
255 
256   getActionDefinitionsBuilder(G_CTLZ)
257       .legalFor({{s32, s32}})
258       .maxScalar(0, s32)
259       .maxScalar(1, s32);
260   getActionDefinitionsBuilder(G_CTLZ_ZERO_UNDEF)
261       .lowerFor({{s32, s32}});
262 
263   getActionDefinitionsBuilder(G_CTTZ)
264       .lowerFor({{s32, s32}})
265       .maxScalar(0, s32)
266       .maxScalar(1, s32);
267   getActionDefinitionsBuilder(G_CTTZ_ZERO_UNDEF)
268       .lowerFor({{s32, s32}, {s64, s64}});
269 
270   getActionDefinitionsBuilder(G_CTPOP)
271       .lowerFor({{s32, s32}})
272       .clampScalar(0, s32, s32)
273       .clampScalar(1, s32, s32);
274 
275   // FP instructions
276   getActionDefinitionsBuilder(G_FCONSTANT)
277       .legalFor({s32, s64});
278 
279   getActionDefinitionsBuilder({G_FADD, G_FSUB, G_FMUL, G_FDIV, G_FABS, G_FSQRT})
280       .legalIf([=, &ST](const LegalityQuery &Query) {
281         if (CheckTyN(0, Query, {s32, s64}))
282           return true;
283         if (ST.hasMSA() && CheckTyN(0, Query, {v16s8, v8s16, v4s32, v2s64}))
284           return true;
285         return false;
286       });
287 
288   getActionDefinitionsBuilder(G_FCMP)
289       .legalFor({{s32, s32}, {s32, s64}})
290       .minScalar(0, s32);
291 
292   getActionDefinitionsBuilder({G_FCEIL, G_FFLOOR})
293       .libcallFor({s32, s64});
294 
295   getActionDefinitionsBuilder(G_FPEXT)
296       .legalFor({{s64, s32}});
297 
298   getActionDefinitionsBuilder(G_FPTRUNC)
299       .legalFor({{s32, s64}});
300 
301   // FP to int conversion instructions
302   getActionDefinitionsBuilder(G_FPTOSI)
303       .legalForCartesianProduct({s32}, {s64, s32})
304       .libcallForCartesianProduct({s64}, {s64, s32})
305       .minScalar(0, s32);
306 
307   getActionDefinitionsBuilder(G_FPTOUI)
308       .libcallForCartesianProduct({s64}, {s64, s32})
309       .lowerForCartesianProduct({s32}, {s64, s32})
310       .minScalar(0, s32);
311 
312   // Int to FP conversion instructions
313   getActionDefinitionsBuilder(G_SITOFP)
314       .legalForCartesianProduct({s64, s32}, {s32})
315       .libcallForCartesianProduct({s64, s32}, {s64})
316       .minScalar(1, s32);
317 
318   getActionDefinitionsBuilder(G_UITOFP)
319       .libcallForCartesianProduct({s64, s32}, {s64})
320       .customForCartesianProduct({s64, s32}, {s32})
321       .minScalar(1, s32);
322 
323   getActionDefinitionsBuilder(G_SEXT_INREG).lower();
324 
325   computeTables();
326   verify(*ST.getInstrInfo());
327 }
328 
329 bool MipsLegalizerInfo::legalizeCustom(LegalizerHelper &Helper,
330                                        MachineInstr &MI) const {
331   using namespace TargetOpcode;
332 
333   MachineIRBuilder &MIRBuilder = Helper.MIRBuilder;
334   MachineRegisterInfo &MRI = *MIRBuilder.getMRI();
335 
336   const LLT s32 = LLT::scalar(32);
337   const LLT s64 = LLT::scalar(64);
338 
339   switch (MI.getOpcode()) {
340   case G_LOAD:
341   case G_STORE: {
342     unsigned MemSize = (**MI.memoperands_begin()).getSize();
343     Register Val = MI.getOperand(0).getReg();
344     unsigned Size = MRI.getType(Val).getSizeInBits();
345 
346     MachineMemOperand *MMOBase = *MI.memoperands_begin();
347 
348     assert(MemSize <= 8 && "MemSize is too large");
349     assert(Size <= 64 && "Scalar size is too large");
350 
351     // Split MemSize into two, P2HalfMemSize is largest power of two smaller
352     // then MemSize. e.g. 8 = 4 + 4 , 6 = 4 + 2, 3 = 2 + 1.
353     unsigned P2HalfMemSize, RemMemSize;
354     if (isPowerOf2_64(MemSize)) {
355       P2HalfMemSize = RemMemSize = MemSize / 2;
356     } else {
357       P2HalfMemSize = 1 << Log2_32(MemSize);
358       RemMemSize = MemSize - P2HalfMemSize;
359     }
360 
361     Register BaseAddr = MI.getOperand(1).getReg();
362     LLT PtrTy = MRI.getType(BaseAddr);
363     MachineFunction &MF = MIRBuilder.getMF();
364 
365     auto P2HalfMemOp = MF.getMachineMemOperand(MMOBase, 0, P2HalfMemSize);
366     auto RemMemOp = MF.getMachineMemOperand(MMOBase, P2HalfMemSize, RemMemSize);
367 
368     if (MI.getOpcode() == G_STORE) {
369       // Widen Val to s32 or s64 in order to create legal G_LSHR or G_UNMERGE.
370       if (Size < 32)
371         Val = MIRBuilder.buildAnyExt(s32, Val).getReg(0);
372       if (Size > 32 && Size < 64)
373         Val = MIRBuilder.buildAnyExt(s64, Val).getReg(0);
374 
375       auto C_P2HalfMemSize = MIRBuilder.buildConstant(s32, P2HalfMemSize);
376       auto Addr = MIRBuilder.buildPtrAdd(PtrTy, BaseAddr, C_P2HalfMemSize);
377 
378       if (MI.getOpcode() == G_STORE && MemSize <= 4) {
379         MIRBuilder.buildStore(Val, BaseAddr, *P2HalfMemOp);
380         auto C_P2Half_InBits = MIRBuilder.buildConstant(s32, P2HalfMemSize * 8);
381         auto Shift = MIRBuilder.buildLShr(s32, Val, C_P2Half_InBits);
382         MIRBuilder.buildStore(Shift, Addr, *RemMemOp);
383       } else {
384         auto Unmerge = MIRBuilder.buildUnmerge(s32, Val);
385         MIRBuilder.buildStore(Unmerge.getReg(0), BaseAddr, *P2HalfMemOp);
386         MIRBuilder.buildStore(Unmerge.getReg(1), Addr, *RemMemOp);
387       }
388     }
389 
390     if (MI.getOpcode() == G_LOAD) {
391 
392       if (MemSize <= 4) {
393         // This is anyextending load, use 4 byte lwr/lwl.
394         auto *Load4MMO = MF.getMachineMemOperand(MMOBase, 0, 4);
395 
396         if (Size == 32)
397           MIRBuilder.buildLoad(Val, BaseAddr, *Load4MMO);
398         else {
399           auto Load = MIRBuilder.buildLoad(s32, BaseAddr, *Load4MMO);
400           MIRBuilder.buildTrunc(Val, Load.getReg(0));
401         }
402 
403       } else {
404         auto C_P2HalfMemSize = MIRBuilder.buildConstant(s32, P2HalfMemSize);
405         auto Addr = MIRBuilder.buildPtrAdd(PtrTy, BaseAddr, C_P2HalfMemSize);
406 
407         auto Load_P2Half = MIRBuilder.buildLoad(s32, BaseAddr, *P2HalfMemOp);
408         auto Load_Rem = MIRBuilder.buildLoad(s32, Addr, *RemMemOp);
409 
410         if (Size == 64)
411           MIRBuilder.buildMerge(Val, {Load_P2Half, Load_Rem});
412         else {
413           auto Merge = MIRBuilder.buildMerge(s64, {Load_P2Half, Load_Rem});
414           MIRBuilder.buildTrunc(Val, Merge);
415         }
416       }
417     }
418     MI.eraseFromParent();
419     break;
420   }
421   case G_UITOFP: {
422     Register Dst = MI.getOperand(0).getReg();
423     Register Src = MI.getOperand(1).getReg();
424     LLT DstTy = MRI.getType(Dst);
425     LLT SrcTy = MRI.getType(Src);
426 
427     if (SrcTy != s32)
428       return false;
429     if (DstTy != s32 && DstTy != s64)
430       return false;
431 
432     // Let 0xABCDEFGH be given unsigned in MI.getOperand(1). First let's convert
433     // unsigned to double. Mantissa has 52 bits so we use following trick:
434     // First make floating point bit mask 0x43300000ABCDEFGH.
435     // Mask represents 2^52 * 0x1.00000ABCDEFGH i.e. 0x100000ABCDEFGH.0 .
436     // Next, subtract  2^52 * 0x1.0000000000000 i.e. 0x10000000000000.0 from it.
437     // Done. Trunc double to float if needed.
438 
439     auto C_HiMask = MIRBuilder.buildConstant(s32, UINT32_C(0x43300000));
440     auto Bitcast = MIRBuilder.buildMerge(s64, {Src, C_HiMask.getReg(0)});
441 
442     MachineInstrBuilder TwoP52FP = MIRBuilder.buildFConstant(
443         s64, BitsToDouble(UINT64_C(0x4330000000000000)));
444 
445     if (DstTy == s64)
446       MIRBuilder.buildFSub(Dst, Bitcast, TwoP52FP);
447     else {
448       MachineInstrBuilder ResF64 = MIRBuilder.buildFSub(s64, Bitcast, TwoP52FP);
449       MIRBuilder.buildFPTrunc(Dst, ResF64);
450     }
451 
452     MI.eraseFromParent();
453     break;
454   }
455   default:
456     return false;
457   }
458 
459   return true;
460 }
461 
462 static bool SelectMSA3OpIntrinsic(MachineInstr &MI, unsigned Opcode,
463                                   MachineIRBuilder &MIRBuilder,
464                                   const MipsSubtarget &ST) {
465   assert(ST.hasMSA() && "MSA intrinsic not supported on target without MSA.");
466   if (!MIRBuilder.buildInstr(Opcode)
467            .add(MI.getOperand(0))
468            .add(MI.getOperand(2))
469            .add(MI.getOperand(3))
470            .constrainAllUses(MIRBuilder.getTII(), *ST.getRegisterInfo(),
471                              *ST.getRegBankInfo()))
472     return false;
473   MI.eraseFromParent();
474   return true;
475 }
476 
477 static bool MSA3OpIntrinsicToGeneric(MachineInstr &MI, unsigned Opcode,
478                                      MachineIRBuilder &MIRBuilder,
479                                      const MipsSubtarget &ST) {
480   assert(ST.hasMSA() && "MSA intrinsic not supported on target without MSA.");
481   MIRBuilder.buildInstr(Opcode)
482       .add(MI.getOperand(0))
483       .add(MI.getOperand(2))
484       .add(MI.getOperand(3));
485   MI.eraseFromParent();
486   return true;
487 }
488 
489 static bool MSA2OpIntrinsicToGeneric(MachineInstr &MI, unsigned Opcode,
490                                      MachineIRBuilder &MIRBuilder,
491                                      const MipsSubtarget &ST) {
492   assert(ST.hasMSA() && "MSA intrinsic not supported on target without MSA.");
493   MIRBuilder.buildInstr(Opcode)
494       .add(MI.getOperand(0))
495       .add(MI.getOperand(2));
496   MI.eraseFromParent();
497   return true;
498 }
499 
500 bool MipsLegalizerInfo::legalizeIntrinsic(LegalizerHelper &Helper,
501                                           MachineInstr &MI) const {
502   MachineIRBuilder &MIRBuilder = Helper.MIRBuilder;
503   MachineRegisterInfo &MRI = *MIRBuilder.getMRI();
504   const MipsSubtarget &ST =
505       static_cast<const MipsSubtarget &>(MI.getMF()->getSubtarget());
506   const MipsInstrInfo &TII = *ST.getInstrInfo();
507   const MipsRegisterInfo &TRI = *ST.getRegisterInfo();
508   const RegisterBankInfo &RBI = *ST.getRegBankInfo();
509 
510   switch (MI.getIntrinsicID()) {
511   case Intrinsic::memcpy:
512   case Intrinsic::memset:
513   case Intrinsic::memmove:
514     if (createMemLibcall(MIRBuilder, MRI, MI) ==
515         LegalizerHelper::UnableToLegalize)
516       return false;
517     MI.eraseFromParent();
518     return true;
519   case Intrinsic::trap: {
520     MachineInstr *Trap = MIRBuilder.buildInstr(Mips::TRAP);
521     MI.eraseFromParent();
522     return constrainSelectedInstRegOperands(*Trap, TII, TRI, RBI);
523   }
524   case Intrinsic::vacopy: {
525     MachinePointerInfo MPO;
526     auto Tmp =
527         MIRBuilder.buildLoad(LLT::pointer(0, 32), MI.getOperand(2),
528                              *MI.getMF()->getMachineMemOperand(
529                                  MPO, MachineMemOperand::MOLoad, 4, Align(4)));
530     MIRBuilder.buildStore(Tmp, MI.getOperand(1),
531                           *MI.getMF()->getMachineMemOperand(
532                               MPO, MachineMemOperand::MOStore, 4, Align(4)));
533     MI.eraseFromParent();
534     return true;
535   }
536   case Intrinsic::mips_addv_b:
537   case Intrinsic::mips_addv_h:
538   case Intrinsic::mips_addv_w:
539   case Intrinsic::mips_addv_d:
540     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_ADD, MIRBuilder, ST);
541   case Intrinsic::mips_addvi_b:
542     return SelectMSA3OpIntrinsic(MI, Mips::ADDVI_B, MIRBuilder, ST);
543   case Intrinsic::mips_addvi_h:
544     return SelectMSA3OpIntrinsic(MI, Mips::ADDVI_H, MIRBuilder, ST);
545   case Intrinsic::mips_addvi_w:
546     return SelectMSA3OpIntrinsic(MI, Mips::ADDVI_W, MIRBuilder, ST);
547   case Intrinsic::mips_addvi_d:
548     return SelectMSA3OpIntrinsic(MI, Mips::ADDVI_D, MIRBuilder, ST);
549   case Intrinsic::mips_subv_b:
550   case Intrinsic::mips_subv_h:
551   case Intrinsic::mips_subv_w:
552   case Intrinsic::mips_subv_d:
553     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_SUB, MIRBuilder, ST);
554   case Intrinsic::mips_subvi_b:
555     return SelectMSA3OpIntrinsic(MI, Mips::SUBVI_B, MIRBuilder, ST);
556   case Intrinsic::mips_subvi_h:
557     return SelectMSA3OpIntrinsic(MI, Mips::SUBVI_H, MIRBuilder, ST);
558   case Intrinsic::mips_subvi_w:
559     return SelectMSA3OpIntrinsic(MI, Mips::SUBVI_W, MIRBuilder, ST);
560   case Intrinsic::mips_subvi_d:
561     return SelectMSA3OpIntrinsic(MI, Mips::SUBVI_D, MIRBuilder, ST);
562   case Intrinsic::mips_mulv_b:
563   case Intrinsic::mips_mulv_h:
564   case Intrinsic::mips_mulv_w:
565   case Intrinsic::mips_mulv_d:
566     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_MUL, MIRBuilder, ST);
567   case Intrinsic::mips_div_s_b:
568   case Intrinsic::mips_div_s_h:
569   case Intrinsic::mips_div_s_w:
570   case Intrinsic::mips_div_s_d:
571     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_SDIV, MIRBuilder, ST);
572   case Intrinsic::mips_mod_s_b:
573   case Intrinsic::mips_mod_s_h:
574   case Intrinsic::mips_mod_s_w:
575   case Intrinsic::mips_mod_s_d:
576     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_SREM, MIRBuilder, ST);
577   case Intrinsic::mips_div_u_b:
578   case Intrinsic::mips_div_u_h:
579   case Intrinsic::mips_div_u_w:
580   case Intrinsic::mips_div_u_d:
581     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_UDIV, MIRBuilder, ST);
582   case Intrinsic::mips_mod_u_b:
583   case Intrinsic::mips_mod_u_h:
584   case Intrinsic::mips_mod_u_w:
585   case Intrinsic::mips_mod_u_d:
586     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_UREM, MIRBuilder, ST);
587   case Intrinsic::mips_fadd_w:
588   case Intrinsic::mips_fadd_d:
589     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_FADD, MIRBuilder, ST);
590   case Intrinsic::mips_fsub_w:
591   case Intrinsic::mips_fsub_d:
592     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_FSUB, MIRBuilder, ST);
593   case Intrinsic::mips_fmul_w:
594   case Intrinsic::mips_fmul_d:
595     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_FMUL, MIRBuilder, ST);
596   case Intrinsic::mips_fdiv_w:
597   case Intrinsic::mips_fdiv_d:
598     return MSA3OpIntrinsicToGeneric(MI, TargetOpcode::G_FDIV, MIRBuilder, ST);
599   case Intrinsic::mips_fmax_a_w:
600     return SelectMSA3OpIntrinsic(MI, Mips::FMAX_A_W, MIRBuilder, ST);
601   case Intrinsic::mips_fmax_a_d:
602     return SelectMSA3OpIntrinsic(MI, Mips::FMAX_A_D, MIRBuilder, ST);
603   case Intrinsic::mips_fsqrt_w:
604     return MSA2OpIntrinsicToGeneric(MI, TargetOpcode::G_FSQRT, MIRBuilder, ST);
605   case Intrinsic::mips_fsqrt_d:
606     return MSA2OpIntrinsicToGeneric(MI, TargetOpcode::G_FSQRT, MIRBuilder, ST);
607   default:
608     break;
609   }
610   return true;
611 }
612