1 //===-- MipsSEInstrInfo.cpp - Mips32/64 Instruction Information -----------===//
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 contains the Mips32/64 implementation of the TargetInstrInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "MipsSEInstrInfo.h"
15 #include "InstPrinter/MipsInstPrinter.h"
16 #include "MipsMachineFunction.h"
17 #include "MipsTargetMachine.h"
18 #include "llvm/ADT/STLExtras.h"
19 #include "llvm/CodeGen/MachineInstrBuilder.h"
20 #include "llvm/CodeGen/MachineRegisterInfo.h"
21 #include "llvm/Support/CommandLine.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/TargetRegistry.h"
27 static cl::opt<bool> NoDPLoadStore("mno-ldc1-sdc1", cl::init(false),
28 cl::desc("Expand double precision loads and "
29 "stores to their single precision "
32 MipsSEInstrInfo::MipsSEInstrInfo(MipsTargetMachine &tm)
34 tm.getRelocationModel() == Reloc::PIC_ ? Mips::B : Mips::J),
35 RI(*tm.getSubtargetImpl()),
36 IsN64(tm.getSubtarget<MipsSubtarget>().isABI_N64()) {}
38 const MipsRegisterInfo &MipsSEInstrInfo::getRegisterInfo() const {
42 /// isLoadFromStackSlot - If the specified machine instruction is a direct
43 /// load from a stack slot, return the virtual or physical register number of
44 /// the destination along with the FrameIndex of the loaded stack slot. If
45 /// not, return 0. This predicate must return 0 if the instruction has
46 /// any side effects other than loading from the stack slot.
47 unsigned MipsSEInstrInfo::
48 isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const
50 unsigned Opc = MI->getOpcode();
52 if ((Opc == Mips::LW) || (Opc == Mips::LD) ||
53 (Opc == Mips::LWC1) || (Opc == Mips::LDC1) || (Opc == Mips::LDC164)) {
54 if ((MI->getOperand(1).isFI()) && // is a stack slot
55 (MI->getOperand(2).isImm()) && // the imm is zero
56 (isZeroImm(MI->getOperand(2)))) {
57 FrameIndex = MI->getOperand(1).getIndex();
58 return MI->getOperand(0).getReg();
65 /// isStoreToStackSlot - If the specified machine instruction is a direct
66 /// store to a stack slot, return the virtual or physical register number of
67 /// the source reg along with the FrameIndex of the loaded stack slot. If
68 /// not, return 0. This predicate must return 0 if the instruction has
69 /// any side effects other than storing to the stack slot.
70 unsigned MipsSEInstrInfo::
71 isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const
73 unsigned Opc = MI->getOpcode();
75 if ((Opc == Mips::SW) || (Opc == Mips::SD) ||
76 (Opc == Mips::SWC1) || (Opc == Mips::SDC1) || (Opc == Mips::SDC164)) {
77 if ((MI->getOperand(1).isFI()) && // is a stack slot
78 (MI->getOperand(2).isImm()) && // the imm is zero
79 (isZeroImm(MI->getOperand(2)))) {
80 FrameIndex = MI->getOperand(1).getIndex();
81 return MI->getOperand(0).getReg();
87 void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
88 MachineBasicBlock::iterator I, DebugLoc DL,
89 unsigned DestReg, unsigned SrcReg,
91 unsigned Opc = 0, ZeroReg = 0;
93 if (Mips::GPR32RegClass.contains(DestReg)) { // Copy to CPU Reg.
94 if (Mips::GPR32RegClass.contains(SrcReg))
95 Opc = Mips::ADDu, ZeroReg = Mips::ZERO;
96 else if (Mips::CCRRegClass.contains(SrcReg))
98 else if (Mips::FGR32RegClass.contains(SrcReg))
100 else if (Mips::HI32RegClass.contains(SrcReg))
101 Opc = Mips::MFHI, SrcReg = 0;
102 else if (Mips::LO32RegClass.contains(SrcReg))
103 Opc = Mips::MFLO, SrcReg = 0;
104 else if (Mips::HI32DSPRegClass.contains(SrcReg))
105 Opc = Mips::MFHI_DSP;
106 else if (Mips::LO32DSPRegClass.contains(SrcReg))
107 Opc = Mips::MFLO_DSP;
108 else if (Mips::DSPCCRegClass.contains(SrcReg)) {
109 BuildMI(MBB, I, DL, get(Mips::RDDSP), DestReg).addImm(1 << 4)
110 .addReg(SrcReg, RegState::Implicit | getKillRegState(KillSrc));
114 else if (Mips::GPR32RegClass.contains(SrcReg)) { // Copy from CPU Reg.
115 if (Mips::CCRRegClass.contains(DestReg))
117 else if (Mips::FGR32RegClass.contains(DestReg))
119 else if (Mips::HI32RegClass.contains(DestReg))
120 Opc = Mips::MTHI, DestReg = 0;
121 else if (Mips::LO32RegClass.contains(DestReg))
122 Opc = Mips::MTLO, DestReg = 0;
123 else if (Mips::HI32DSPRegClass.contains(DestReg))
124 Opc = Mips::MTHI_DSP;
125 else if (Mips::LO32DSPRegClass.contains(DestReg))
126 Opc = Mips::MTLO_DSP;
127 else if (Mips::DSPCCRegClass.contains(DestReg)) {
128 BuildMI(MBB, I, DL, get(Mips::WRDSP))
129 .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1 << 4)
130 .addReg(DestReg, RegState::ImplicitDefine);
134 else if (Mips::FGR32RegClass.contains(DestReg, SrcReg))
136 else if (Mips::AFGR64RegClass.contains(DestReg, SrcReg))
137 Opc = Mips::FMOV_D32;
138 else if (Mips::FGR64RegClass.contains(DestReg, SrcReg))
139 Opc = Mips::FMOV_D64;
140 else if (Mips::GPR64RegClass.contains(DestReg)) { // Copy to CPU64 Reg.
141 if (Mips::GPR64RegClass.contains(SrcReg))
142 Opc = Mips::DADDu, ZeroReg = Mips::ZERO_64;
143 else if (Mips::HI64RegClass.contains(SrcReg))
144 Opc = Mips::MFHI64, SrcReg = 0;
145 else if (Mips::LO64RegClass.contains(SrcReg))
146 Opc = Mips::MFLO64, SrcReg = 0;
147 else if (Mips::FGR64RegClass.contains(SrcReg))
150 else if (Mips::GPR64RegClass.contains(SrcReg)) { // Copy from CPU64 Reg.
151 if (Mips::HI64RegClass.contains(DestReg))
152 Opc = Mips::MTHI64, DestReg = 0;
153 else if (Mips::LO64RegClass.contains(DestReg))
154 Opc = Mips::MTLO64, DestReg = 0;
155 else if (Mips::FGR64RegClass.contains(DestReg))
159 assert(Opc && "Cannot copy registers");
161 MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(Opc));
164 MIB.addReg(DestReg, RegState::Define);
167 MIB.addReg(SrcReg, getKillRegState(KillSrc));
173 void MipsSEInstrInfo::
174 storeRegToStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
175 unsigned SrcReg, bool isKill, int FI,
176 const TargetRegisterClass *RC, const TargetRegisterInfo *TRI,
177 int64_t Offset) const {
179 if (I != MBB.end()) DL = I->getDebugLoc();
180 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOStore);
184 if (Mips::GPR32RegClass.hasSubClassEq(RC))
186 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
188 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
189 Opc = Mips::STORE_ACC64;
190 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
191 Opc = Mips::STORE_ACC64DSP;
192 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
193 Opc = Mips::STORE_ACC128;
194 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
195 Opc = Mips::STORE_CCOND_DSP;
196 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
198 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
200 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
202 else if (RC->hasType(MVT::v16i8))
204 else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
206 else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
208 else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
211 assert(Opc && "Register class not handled!");
212 BuildMI(MBB, I, DL, get(Opc)).addReg(SrcReg, getKillRegState(isKill))
213 .addFrameIndex(FI).addImm(Offset).addMemOperand(MMO);
216 void MipsSEInstrInfo::
217 loadRegFromStack(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
218 unsigned DestReg, int FI, const TargetRegisterClass *RC,
219 const TargetRegisterInfo *TRI, int64_t Offset) const {
221 if (I != MBB.end()) DL = I->getDebugLoc();
222 MachineMemOperand *MMO = GetMemOperand(MBB, FI, MachineMemOperand::MOLoad);
225 if (Mips::GPR32RegClass.hasSubClassEq(RC))
227 else if (Mips::GPR64RegClass.hasSubClassEq(RC))
229 else if (Mips::ACC64RegClass.hasSubClassEq(RC))
230 Opc = Mips::LOAD_ACC64;
231 else if (Mips::ACC64DSPRegClass.hasSubClassEq(RC))
232 Opc = Mips::LOAD_ACC64DSP;
233 else if (Mips::ACC128RegClass.hasSubClassEq(RC))
234 Opc = Mips::LOAD_ACC128;
235 else if (Mips::DSPCCRegClass.hasSubClassEq(RC))
236 Opc = Mips::LOAD_CCOND_DSP;
237 else if (Mips::FGR32RegClass.hasSubClassEq(RC))
239 else if (Mips::AFGR64RegClass.hasSubClassEq(RC))
241 else if (Mips::FGR64RegClass.hasSubClassEq(RC))
243 else if (RC->hasType(MVT::v16i8))
245 else if (RC->hasType(MVT::v8i16) || RC->hasType(MVT::v8f16))
247 else if (RC->hasType(MVT::v4i32) || RC->hasType(MVT::v4f32))
249 else if (RC->hasType(MVT::v2i64) || RC->hasType(MVT::v2f64))
252 assert(Opc && "Register class not handled!");
253 BuildMI(MBB, I, DL, get(Opc), DestReg).addFrameIndex(FI).addImm(Offset)
257 bool MipsSEInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
258 MachineBasicBlock &MBB = *MI->getParent();
260 switch(MI->getDesc().getOpcode()) {
264 expandRetRA(MBB, MI, Mips::RET);
266 case Mips::PseudoCVT_S_W:
267 expandCvtFPInt(MBB, MI, Mips::CVT_S_W, Mips::MTC1, false);
269 case Mips::PseudoCVT_D32_W:
270 expandCvtFPInt(MBB, MI, Mips::CVT_D32_W, Mips::MTC1, false);
272 case Mips::PseudoCVT_S_L:
273 expandCvtFPInt(MBB, MI, Mips::CVT_S_L, Mips::DMTC1, true);
275 case Mips::PseudoCVT_D64_W:
276 expandCvtFPInt(MBB, MI, Mips::CVT_D64_W, Mips::MTC1, true);
278 case Mips::PseudoCVT_D64_L:
279 expandCvtFPInt(MBB, MI, Mips::CVT_D64_L, Mips::DMTC1, true);
281 case Mips::BuildPairF64:
282 expandBuildPairF64(MBB, MI, false);
284 case Mips::BuildPairF64_64:
285 expandBuildPairF64(MBB, MI, true);
287 case Mips::ExtractElementF64:
288 expandExtractElementF64(MBB, MI, false);
290 case Mips::ExtractElementF64_64:
291 expandExtractElementF64(MBB, MI, true);
293 case Mips::PseudoLDC1:
294 expandDPLoadStore(MBB, MI, Mips::LDC1, Mips::LWC1);
296 case Mips::PseudoSDC1:
297 expandDPLoadStore(MBB, MI, Mips::SDC1, Mips::SWC1);
299 case Mips::MIPSeh_return32:
300 case Mips::MIPSeh_return64:
301 expandEhReturn(MBB, MI);
309 /// getOppositeBranchOpc - Return the inverse of the specified
310 /// opcode, e.g. turning BEQ to BNE.
311 unsigned MipsSEInstrInfo::getOppositeBranchOpc(unsigned Opc) const {
313 default: llvm_unreachable("Illegal opcode!");
314 case Mips::BEQ: return Mips::BNE;
315 case Mips::BNE: return Mips::BEQ;
316 case Mips::BGTZ: return Mips::BLEZ;
317 case Mips::BGEZ: return Mips::BLTZ;
318 case Mips::BLTZ: return Mips::BGEZ;
319 case Mips::BLEZ: return Mips::BGTZ;
320 case Mips::BEQ64: return Mips::BNE64;
321 case Mips::BNE64: return Mips::BEQ64;
322 case Mips::BGTZ64: return Mips::BLEZ64;
323 case Mips::BGEZ64: return Mips::BLTZ64;
324 case Mips::BLTZ64: return Mips::BGEZ64;
325 case Mips::BLEZ64: return Mips::BGTZ64;
326 case Mips::BC1T: return Mips::BC1F;
327 case Mips::BC1F: return Mips::BC1T;
331 /// Adjust SP by Amount bytes.
332 void MipsSEInstrInfo::adjustStackPtr(unsigned SP, int64_t Amount,
333 MachineBasicBlock &MBB,
334 MachineBasicBlock::iterator I) const {
335 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
336 DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
337 unsigned ADDu = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
338 unsigned ADDiu = STI.isABI_N64() ? Mips::DADDiu : Mips::ADDiu;
340 if (isInt<16>(Amount))// addi sp, sp, amount
341 BuildMI(MBB, I, DL, get(ADDiu), SP).addReg(SP).addImm(Amount);
342 else { // Expand immediate that doesn't fit in 16-bit.
343 unsigned Reg = loadImmediate(Amount, MBB, I, DL, 0);
344 BuildMI(MBB, I, DL, get(ADDu), SP).addReg(SP).addReg(Reg, RegState::Kill);
348 /// This function generates the sequence of instructions needed to get the
349 /// result of adding register REG and immediate IMM.
351 MipsSEInstrInfo::loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
352 MachineBasicBlock::iterator II, DebugLoc DL,
353 unsigned *NewImm) const {
354 MipsAnalyzeImmediate AnalyzeImm;
355 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
356 MachineRegisterInfo &RegInfo = MBB.getParent()->getRegInfo();
357 unsigned Size = STI.isABI_N64() ? 64 : 32;
358 unsigned LUi = STI.isABI_N64() ? Mips::LUi64 : Mips::LUi;
359 unsigned ZEROReg = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
360 const TargetRegisterClass *RC = STI.isABI_N64() ?
361 &Mips::GPR64RegClass : &Mips::GPR32RegClass;
362 bool LastInstrIsADDiu = NewImm;
364 const MipsAnalyzeImmediate::InstSeq &Seq =
365 AnalyzeImm.Analyze(Imm, Size, LastInstrIsADDiu);
366 MipsAnalyzeImmediate::InstSeq::const_iterator Inst = Seq.begin();
368 assert(Seq.size() && (!LastInstrIsADDiu || (Seq.size() > 1)));
370 // The first instruction can be a LUi, which is different from other
371 // instructions (ADDiu, ORI and SLL) in that it does not have a register
373 unsigned Reg = RegInfo.createVirtualRegister(RC);
375 if (Inst->Opc == LUi)
376 BuildMI(MBB, II, DL, get(LUi), Reg).addImm(SignExtend64<16>(Inst->ImmOpnd));
378 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(ZEROReg)
379 .addImm(SignExtend64<16>(Inst->ImmOpnd));
381 // Build the remaining instructions in Seq.
382 for (++Inst; Inst != Seq.end() - LastInstrIsADDiu; ++Inst)
383 BuildMI(MBB, II, DL, get(Inst->Opc), Reg).addReg(Reg, RegState::Kill)
384 .addImm(SignExtend64<16>(Inst->ImmOpnd));
386 if (LastInstrIsADDiu)
387 *NewImm = Inst->ImmOpnd;
392 unsigned MipsSEInstrInfo::getAnalyzableBrOpc(unsigned Opc) const {
393 return (Opc == Mips::BEQ || Opc == Mips::BNE || Opc == Mips::BGTZ ||
394 Opc == Mips::BGEZ || Opc == Mips::BLTZ || Opc == Mips::BLEZ ||
395 Opc == Mips::BEQ64 || Opc == Mips::BNE64 || Opc == Mips::BGTZ64 ||
396 Opc == Mips::BGEZ64 || Opc == Mips::BLTZ64 || Opc == Mips::BLEZ64 ||
397 Opc == Mips::BC1T || Opc == Mips::BC1F || Opc == Mips::B ||
402 void MipsSEInstrInfo::expandRetRA(MachineBasicBlock &MBB,
403 MachineBasicBlock::iterator I,
404 unsigned Opc) const {
405 BuildMI(MBB, I, I->getDebugLoc(), get(Opc)).addReg(Mips::RA);
408 std::pair<bool, bool>
409 MipsSEInstrInfo::compareOpndSize(unsigned Opc,
410 const MachineFunction &MF) const {
411 const MCInstrDesc &Desc = get(Opc);
412 assert(Desc.NumOperands == 2 && "Unary instruction expected.");
413 const MipsRegisterInfo *RI = &getRegisterInfo();
414 unsigned DstRegSize = getRegClass(Desc, 0, RI, MF)->getSize();
415 unsigned SrcRegSize = getRegClass(Desc, 1, RI, MF)->getSize();
417 return std::make_pair(DstRegSize > SrcRegSize, DstRegSize < SrcRegSize);
420 void MipsSEInstrInfo::expandCvtFPInt(MachineBasicBlock &MBB,
421 MachineBasicBlock::iterator I,
422 unsigned CvtOpc, unsigned MovOpc,
424 const MCInstrDesc &CvtDesc = get(CvtOpc), &MovDesc = get(MovOpc);
425 const MachineOperand &Dst = I->getOperand(0), &Src = I->getOperand(1);
426 unsigned DstReg = Dst.getReg(), SrcReg = Src.getReg(), TmpReg = DstReg;
427 unsigned KillSrc = getKillRegState(Src.isKill());
428 DebugLoc DL = I->getDebugLoc();
429 bool DstIsLarger, SrcIsLarger;
431 tie(DstIsLarger, SrcIsLarger) = compareOpndSize(CvtOpc, *MBB.getParent());
434 TmpReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
437 DstReg = getRegisterInfo().getSubReg(DstReg, Mips::sub_lo);
439 BuildMI(MBB, I, DL, MovDesc, TmpReg).addReg(SrcReg, KillSrc);
440 BuildMI(MBB, I, DL, CvtDesc, DstReg).addReg(TmpReg, RegState::Kill);
443 void MipsSEInstrInfo::expandExtractElementF64(MachineBasicBlock &MBB,
444 MachineBasicBlock::iterator I,
446 unsigned DstReg = I->getOperand(0).getReg();
447 unsigned SrcReg = I->getOperand(1).getReg();
448 unsigned N = I->getOperand(2).getImm();
449 DebugLoc dl = I->getDebugLoc();
451 assert(N < 2 && "Invalid immediate");
452 unsigned SubIdx = N ? Mips::sub_hi : Mips::sub_lo;
453 unsigned SubReg = getRegisterInfo().getSubReg(SrcReg, SubIdx);
455 if (SubIdx == Mips::sub_hi && FP64)
456 BuildMI(MBB, I, dl, get(Mips::MFHC1), DstReg).addReg(SubReg);
458 BuildMI(MBB, I, dl, get(Mips::MFC1), DstReg).addReg(SubReg);
461 void MipsSEInstrInfo::expandBuildPairF64(MachineBasicBlock &MBB,
462 MachineBasicBlock::iterator I,
464 unsigned DstReg = I->getOperand(0).getReg();
465 unsigned LoReg = I->getOperand(1).getReg(), HiReg = I->getOperand(2).getReg();
466 const MCInstrDesc& Mtc1Tdd = get(Mips::MTC1);
467 DebugLoc dl = I->getDebugLoc();
468 const TargetRegisterInfo &TRI = getRegisterInfo();
472 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_lo))
476 BuildMI(MBB, I, dl, get(Mips::MTHC1), TRI.getSubReg(DstReg, Mips::sub_hi))
479 BuildMI(MBB, I, dl, Mtc1Tdd, TRI.getSubReg(DstReg, Mips::sub_hi))
483 /// Add 4 to the displacement of operand MO.
484 static void fixDisp(MachineOperand &MO) {
485 switch (MO.getType()) {
487 llvm_unreachable("Unhandled operand type.");
488 case MachineOperand::MO_Immediate:
489 MO.setImm(MO.getImm() + 4);
491 case MachineOperand::MO_GlobalAddress:
492 case MachineOperand::MO_ConstantPoolIndex:
493 case MachineOperand::MO_BlockAddress:
494 case MachineOperand::MO_TargetIndex:
495 case MachineOperand::MO_ExternalSymbol:
496 MO.setOffset(MO.getOffset() + 4);
501 void MipsSEInstrInfo::expandDPLoadStore(MachineBasicBlock &MBB,
502 MachineBasicBlock::iterator I,
503 unsigned OpcD, unsigned OpcS) const {
504 // If NoDPLoadStore is false, just change the opcode.
505 if (!NoDPLoadStore) {
506 genInstrWithNewOpc(OpcD, I);
510 // Expand a double precision FP load or store to two single precision
513 const TargetRegisterInfo &TRI = getRegisterInfo();
514 const MachineOperand &ValReg = I->getOperand(0);
515 unsigned LoReg = TRI.getSubReg(ValReg.getReg(), Mips::sub_lo);
516 unsigned HiReg = TRI.getSubReg(ValReg.getReg(), Mips::sub_hi);
518 if (!TM.getSubtarget<MipsSubtarget>().isLittle())
519 std::swap(LoReg, HiReg);
521 // Create an instruction which loads from or stores to the lower memory
523 MachineInstrBuilder MIB = genInstrWithNewOpc(OpcS, I);
524 MIB->getOperand(0).setReg(LoReg);
526 // Create an instruction which loads from or stores to the higher memory
528 MIB = genInstrWithNewOpc(OpcS, I);
529 MIB->getOperand(0).setReg(HiReg);
530 fixDisp(MIB->getOperand(2));
533 void MipsSEInstrInfo::expandEhReturn(MachineBasicBlock &MBB,
534 MachineBasicBlock::iterator I) const {
535 // This pseudo instruction is generated as part of the lowering of
536 // ISD::EH_RETURN. We convert it to a stack increment by OffsetReg, and
537 // indirect jump to TargetReg
538 const MipsSubtarget &STI = TM.getSubtarget<MipsSubtarget>();
539 unsigned ADDU = STI.isABI_N64() ? Mips::DADDu : Mips::ADDu;
540 unsigned JR = STI.isABI_N64() ? Mips::JR64 : Mips::JR;
541 unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
542 unsigned RA = STI.isABI_N64() ? Mips::RA_64 : Mips::RA;
543 unsigned T9 = STI.isABI_N64() ? Mips::T9_64 : Mips::T9;
544 unsigned ZERO = STI.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO;
545 unsigned OffsetReg = I->getOperand(0).getReg();
546 unsigned TargetReg = I->getOperand(1).getReg();
548 // addu $ra, $v0, $zero
549 // addu $sp, $sp, $v1
551 if (TM.getRelocationModel() == Reloc::PIC_)
552 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), T9)
553 .addReg(TargetReg).addReg(ZERO);
554 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), RA)
555 .addReg(TargetReg).addReg(ZERO);
556 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(ADDU), SP)
557 .addReg(SP).addReg(OffsetReg);
558 BuildMI(MBB, I, I->getDebugLoc(), TM.getInstrInfo()->get(JR)).addReg(RA);
561 const MipsInstrInfo *llvm::createMipsSEInstrInfo(MipsTargetMachine &TM) {
562 return new MipsSEInstrInfo(TM);